move freemodbus tcp server from control to connetion
This commit is contained in:
Wien.b
@@ -13,3 +13,12 @@ config CONNECTION_ADAPTER_POWERLINK
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if CONNECTION_ADAPTER_POWERLINK
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source "$APP_DIR/Framework/connection/industrial_network/powerlink/Kconfig"
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endif
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config CONNECTION_ADAPTER_FREEMODBUSTCP
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bool "Using FREEMODBUSTCP on industrial network adapter device"
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default n
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if CONNECTION_ADAPTER_FREEMODBUSTCP
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source "$APP_DIR/Framework/connection/industrial_network/freemodbus_tcp/Kconfig"
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endif
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@@ -8,4 +8,8 @@ ifeq ($(CONFIG_CONNECTION_ADAPTER_ETHERCAT),y)
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SRC_DIR += ethercat
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endif
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ifeq ($(CONFIG_CONNECTION_ADAPTER_FREEMODBUSTCP),y)
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SRC_DIR += freemodbus_tcp
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endif
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include $(KERNEL_ROOT)/compiler.mk
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@@ -0,0 +1,92 @@
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void LwipTcpRecvTest(void)
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{
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uint8_t enet_port = 0; ///< test enet port 0
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lwip_config_net(enet_port, lwip_ipaddr, lwip_netmask, lwip_gwaddr);
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uint8_t *recv_data;
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socklen_t sin_size;
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int sock = -1, connected, bytes_received, i;
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struct sockaddr_in server_addr, client_addr;
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fd_set readset;
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struct timeval timeout;
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sock = socket(AF_INET, SOCK_STREAM, 0);
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if (sock < 0) {
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KPrintf("[%s:%d] Socket error!\n", __FILE__, __LINE__);
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goto __exit;
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}
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recv_data = (uint8_t *)malloc(128);
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if (recv_data == NULL) {
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KPrintf("No memory!\n");
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goto __exit;
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}
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//configure tcp server param
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server_addr.sin_family = AF_INET;
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server_addr.sin_port = htons(tcp_server_port);
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server_addr.sin_addr.s_addr = INADDR_ANY;
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memset(&(server_addr.sin_zero), 0x0, sizeof(server_addr.sin_zero));
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if (bind(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1) {
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KPrintf("Unable to bind!\n");
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goto __exit;
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}
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if (listen(sock, 5) == -1) {
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KPrintf("Listen error!\n");
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goto __exit;
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}
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timeout.tv_sec = 30;
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timeout.tv_usec = 0;
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if (setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout)) ==-1) {
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KPrintf("setsockopt failed!");
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goto __exit;
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}
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while (1) {
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FD_ZERO(&readset);
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FD_SET(sock, &readset);
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if (select(sock + 1, &readset, NULL, NULL, &timeout) == 0) {
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continue;
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}
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sin_size = sizeof(struct sockaddr_in);
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connected = accept(sock, (struct sockaddr *)&client_addr, &sin_size);
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while (1) {
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bytes_received = recv(connected, recv_data, 128, 0);
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if (bytes_received == 0) {
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KPrintf("client disconnected (%s, %d)\n",inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));
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break;
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} else if (bytes_received < 0) {
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KPrintf("recv error, client: (%s, %d)\n",inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));
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break;
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} else {
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KPrintf("new client connected from (%s, %d)\n",inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));
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KPrintf("recv data length %d Bytes\n", bytes_received);
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for (i = 0; i < bytes_received; i ++) {
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KPrintf("data 0x%x\n", recv_data[i]);
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}
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if (i = bytes_received) {
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KPrintf("\r\n");
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memset(recv_data, 0, sizeof(recv_data));
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}
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}
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}
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if (connected >= 0) {
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closesocket(connected);
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connected = -1;
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break;
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}
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__exit:
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if (sock >= 0) closesocket(sock);
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if (recv_data) free(recv_data);
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}
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SHELL_EXPORT_CMD(SHELL_CMD_PERMISSION(0) |
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SHELL_CMD_TYPE(SHELL_TYPE_CMD_MAIN) | SHELL_CMD_PARAM_NUM(0),TCPRecv, LwipTcpRecvTest, TCP Recv message);
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@@ -0,0 +1,3 @@
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SRC_FILES := $(wildcard ./*.c)
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include $(KERNEL_ROOT)/compiler.mk
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@@ -0,0 +1,411 @@
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/*
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* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
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* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/* ----------------------- System includes ----------------------------------*/
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#include "stdlib.h"
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#include "string.h"
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/* ----------------------- Platform includes --------------------------------*/
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#include "port.h"
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/* ----------------------- Modbus includes ----------------------------------*/
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#include "mb.h"
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#include "mbconfig.h"
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#include "mbframe.h"
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#include "mbproto.h"
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#include "mbfunc.h"
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#include "mbport.h"
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#if MB_RTU_ENABLED == 1
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#include "mbrtu.h"
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#endif
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#if MB_ASCII_ENABLED == 1
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#include "mbascii.h"
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#endif
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#if MB_TCP_ENABLED == 1
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#include "mbtcp.h"
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#endif
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#ifndef MB_PORT_HAS_CLOSE
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#define MB_PORT_HAS_CLOSE 0
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#endif
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/* ----------------------- Static variables ---------------------------------*/
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static UCHAR ucMBAddress;
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static eMBMode eMBCurrentMode;
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static enum
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{
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STATE_ENABLED,
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STATE_DISABLED,
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STATE_NOT_INITIALIZED
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} eMBState = STATE_NOT_INITIALIZED;
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/* Functions pointer which are initialized in eMBInit( ). Depending on the
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* mode (RTU or ASCII) the are set to the correct implementations.
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*/
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static peMBFrameSend peMBFrameSendCur;
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static pvMBFrameStart pvMBFrameStartCur;
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static pvMBFrameStop pvMBFrameStopCur;
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static peMBFrameReceive peMBFrameReceiveCur;
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static pvMBFrameClose pvMBFrameCloseCur;
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/* Callback functions required by the porting layer. They are called when
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* an external event has happend which includes a timeout or the reception
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* or transmission of a character.
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*/
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BOOL( *pxMBFrameCBByteReceived ) ( void );
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BOOL( *pxMBFrameCBTransmitterEmpty ) ( void );
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BOOL( *pxMBPortCBTimerExpired ) ( void );
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BOOL( *pxMBFrameCBReceiveFSMCur ) ( void );
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BOOL( *pxMBFrameCBTransmitFSMCur ) ( void );
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/* An array of Modbus functions handlers which associates Modbus function
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* codes with implementing functions.
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*/
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static xMBFunctionHandler xFuncHandlers[MB_FUNC_HANDLERS_MAX] = {
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#if MB_FUNC_OTHER_REP_SLAVEID_ENABLED > 0
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{MB_FUNC_OTHER_REPORT_SLAVEID, eMBFuncReportSlaveID},
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#endif
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#if MB_FUNC_READ_INPUT_ENABLED > 0
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{MB_FUNC_READ_INPUT_REGISTER, eMBFuncReadInputRegister},
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#endif
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#if MB_FUNC_READ_HOLDING_ENABLED > 0
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{MB_FUNC_READ_HOLDING_REGISTER, eMBFuncReadHoldingRegister},
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#endif
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#if MB_FUNC_WRITE_MULTIPLE_HOLDING_ENABLED > 0
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{MB_FUNC_WRITE_MULTIPLE_REGISTERS, eMBFuncWriteMultipleHoldingRegister},
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#endif
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#if MB_FUNC_WRITE_HOLDING_ENABLED > 0
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{MB_FUNC_WRITE_REGISTER, eMBFuncWriteHoldingRegister},
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#endif
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#if MB_FUNC_READWRITE_HOLDING_ENABLED > 0
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{MB_FUNC_READWRITE_MULTIPLE_REGISTERS, eMBFuncReadWriteMultipleHoldingRegister},
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#endif
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#if MB_FUNC_READ_COILS_ENABLED > 0
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{MB_FUNC_READ_COILS, eMBFuncReadCoils},
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#endif
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#if MB_FUNC_WRITE_COIL_ENABLED > 0
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{MB_FUNC_WRITE_SINGLE_COIL, eMBFuncWriteCoil},
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#endif
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#if MB_FUNC_WRITE_MULTIPLE_COILS_ENABLED > 0
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{MB_FUNC_WRITE_MULTIPLE_COILS, eMBFuncWriteMultipleCoils},
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#endif
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#if MB_FUNC_READ_DISCRETE_INPUTS_ENABLED > 0
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{MB_FUNC_READ_DISCRETE_INPUTS, eMBFuncReadDiscreteInputs},
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#endif
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};
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/* ----------------------- Start implementation -----------------------------*/
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eMBErrorCode
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eMBInit( eMBMode eMode, UCHAR ucSlaveAddress, UCHAR ucPort, ULONG ulBaudRate, eMBParity eParity )
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{
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eMBErrorCode eStatus = MB_ENOERR;
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/* check preconditions */
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if( ( ucSlaveAddress == MB_ADDRESS_BROADCAST ) ||
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( ucSlaveAddress < MB_ADDRESS_MIN ) || ( ucSlaveAddress > MB_ADDRESS_MAX ) )
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{
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eStatus = MB_EINVAL;
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}
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else
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{
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ucMBAddress = ucSlaveAddress;
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switch ( eMode )
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{
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#if MB_RTU_ENABLED > 0
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case MB_RTU:
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pvMBFrameStartCur = eMBRTUStart;
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pvMBFrameStopCur = eMBRTUStop;
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peMBFrameSendCur = eMBRTUSend;
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peMBFrameReceiveCur = eMBRTUReceive;
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pvMBFrameCloseCur = MB_PORT_HAS_CLOSE ? vMBPortClose : NULL;
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pxMBFrameCBByteReceived = xMBRTUReceiveFSM;
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pxMBFrameCBTransmitterEmpty = xMBRTUTransmitFSM;
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pxMBPortCBTimerExpired = xMBRTUTimerT35Expired;
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eStatus = eMBRTUInit( ucMBAddress, ucPort, ulBaudRate, eParity );
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break;
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#endif
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#if MB_ASCII_ENABLED > 0
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case MB_ASCII:
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pvMBFrameStartCur = eMBASCIIStart;
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pvMBFrameStopCur = eMBASCIIStop;
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peMBFrameSendCur = eMBASCIISend;
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peMBFrameReceiveCur = eMBASCIIReceive;
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pvMBFrameCloseCur = MB_PORT_HAS_CLOSE ? vMBPortClose : NULL;
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pxMBFrameCBByteReceived = xMBASCIIReceiveFSM;
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pxMBFrameCBTransmitterEmpty = xMBASCIITransmitFSM;
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pxMBPortCBTimerExpired = xMBASCIITimerT1SExpired;
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eStatus = eMBASCIIInit( ucMBAddress, ucPort, ulBaudRate, eParity );
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break;
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#endif
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default:
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eStatus = MB_EINVAL;
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}
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if( eStatus == MB_ENOERR )
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{
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if( !xMBPortEventInit( ) )
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{
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/* port dependent event module initalization failed. */
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eStatus = MB_EPORTERR;
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}
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else
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{
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eMBCurrentMode = eMode;
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eMBState = STATE_DISABLED;
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}
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}
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}
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return eStatus;
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}
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#if MB_TCP_ENABLED > 0
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eMBErrorCode
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eMBTCPInit( USHORT ucTCPPort )
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{
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eMBErrorCode eStatus = MB_ENOERR;
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if( ( eStatus = eMBTCPDoInit( ucTCPPort ) ) != MB_ENOERR )
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{
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eMBState = STATE_DISABLED;
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}
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else if( !xMBPortEventInit( ) )
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{
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/* Port dependent event module initalization failed. */
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eStatus = MB_EPORTERR;
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}
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else
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{
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pvMBFrameStartCur = eMBTCPStart;
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pvMBFrameStopCur = eMBTCPStop;
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peMBFrameReceiveCur = eMBTCPReceive;
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peMBFrameSendCur = eMBTCPSend;
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pvMBFrameCloseCur = MB_PORT_HAS_CLOSE ? vMBTCPPortClose : NULL;
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ucMBAddress = MB_TCP_PSEUDO_ADDRESS;
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eMBCurrentMode = MB_TCP;
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eMBState = STATE_DISABLED;
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}
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return eStatus;
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}
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#endif
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eMBErrorCode
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eMBRegisterCB( UCHAR ucFunctionCode, pxMBFunctionHandler pxHandler )
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{
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int i;
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eMBErrorCode eStatus;
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if( ( 0 < ucFunctionCode ) && ( ucFunctionCode <= 127 ) )
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{
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ENTER_CRITICAL_SECTION( );
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if( pxHandler != NULL )
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{
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for( i = 0; i < MB_FUNC_HANDLERS_MAX; i++ )
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{
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if( ( xFuncHandlers[i].pxHandler == NULL ) ||
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( xFuncHandlers[i].pxHandler == pxHandler ) )
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{
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xFuncHandlers[i].ucFunctionCode = ucFunctionCode;
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xFuncHandlers[i].pxHandler = pxHandler;
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break;
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}
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}
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eStatus = ( i != MB_FUNC_HANDLERS_MAX ) ? MB_ENOERR : MB_ENORES;
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}
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else
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{
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for( i = 0; i < MB_FUNC_HANDLERS_MAX; i++ )
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{
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if( xFuncHandlers[i].ucFunctionCode == ucFunctionCode )
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{
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xFuncHandlers[i].ucFunctionCode = 0;
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xFuncHandlers[i].pxHandler = NULL;
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break;
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}
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}
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/* Remove can't fail. */
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eStatus = MB_ENOERR;
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}
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EXIT_CRITICAL_SECTION( );
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}
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else
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{
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eStatus = MB_EINVAL;
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}
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return eStatus;
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}
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|
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eMBErrorCode
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eMBClose( void )
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{
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eMBErrorCode eStatus = MB_ENOERR;
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if( eMBState == STATE_DISABLED )
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{
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if( pvMBFrameCloseCur != NULL )
|
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{
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pvMBFrameCloseCur( );
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}
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}
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else
|
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{
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eStatus = MB_EILLSTATE;
|
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}
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return eStatus;
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}
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eMBErrorCode
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eMBEnable( void )
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{
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eMBErrorCode eStatus = MB_ENOERR;
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|
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if( eMBState == STATE_DISABLED )
|
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{
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/* Activate the protocol stack. */
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pvMBFrameStartCur( );
|
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eMBState = STATE_ENABLED;
|
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}
|
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else
|
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{
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eStatus = MB_EILLSTATE;
|
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}
|
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return eStatus;
|
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}
|
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|
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eMBErrorCode
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eMBDisable( void )
|
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{
|
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eMBErrorCode eStatus;
|
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|
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if( eMBState == STATE_ENABLED )
|
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{
|
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pvMBFrameStopCur( );
|
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eMBState = STATE_DISABLED;
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eStatus = MB_ENOERR;
|
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}
|
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else if( eMBState == STATE_DISABLED )
|
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{
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eStatus = MB_ENOERR;
|
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}
|
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else
|
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{
|
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eStatus = MB_EILLSTATE;
|
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}
|
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return eStatus;
|
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}
|
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|
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eMBErrorCode
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eMBPoll( void )
|
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{
|
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static UCHAR *ucMBFrame;
|
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static UCHAR ucRcvAddress;
|
||||
static UCHAR ucFunctionCode;
|
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static USHORT usLength;
|
||||
static eMBException eException;
|
||||
|
||||
int i;
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
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eMBEventType eEvent;
|
||||
|
||||
/* Check if the protocol stack is ready. */
|
||||
if( eMBState != STATE_ENABLED )
|
||||
{
|
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return MB_EILLSTATE;
|
||||
}
|
||||
|
||||
/* Check if there is a event available. If not return control to caller.
|
||||
* Otherwise we will handle the event. */
|
||||
if( xMBPortEventGet( &eEvent ) == TRUE )
|
||||
{
|
||||
switch ( eEvent )
|
||||
{
|
||||
case EV_READY:
|
||||
break;
|
||||
|
||||
case EV_FRAME_RECEIVED:
|
||||
eStatus = peMBFrameReceiveCur( &ucRcvAddress, &ucMBFrame, &usLength );
|
||||
if( eStatus == MB_ENOERR )
|
||||
{
|
||||
/* Check if the frame is for us. If not ignore the frame. */
|
||||
if( ( ucRcvAddress == ucMBAddress ) || ( ucRcvAddress == MB_ADDRESS_BROADCAST ) )
|
||||
{
|
||||
( void )xMBPortEventPost( EV_EXECUTE );
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
||||
case EV_EXECUTE:
|
||||
ucFunctionCode = ucMBFrame[MB_PDU_FUNC_OFF];
|
||||
eException = MB_EX_ILLEGAL_FUNCTION;
|
||||
for( i = 0; i < MB_FUNC_HANDLERS_MAX; i++ )
|
||||
{
|
||||
/* No more function handlers registered. Abort. */
|
||||
if( xFuncHandlers[i].ucFunctionCode == 0 )
|
||||
{
|
||||
break;
|
||||
}
|
||||
else if( xFuncHandlers[i].ucFunctionCode == ucFunctionCode )
|
||||
{
|
||||
eException = xFuncHandlers[i].pxHandler( ucMBFrame, &usLength );
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* If the request was not sent to the broadcast address we
|
||||
* return a reply. */
|
||||
if( ucRcvAddress != MB_ADDRESS_BROADCAST )
|
||||
{
|
||||
if( eException != MB_EX_NONE )
|
||||
{
|
||||
/* An exception occured. Build an error frame. */
|
||||
usLength = 0;
|
||||
ucMBFrame[usLength++] = ( UCHAR )( ucFunctionCode | MB_FUNC_ERROR );
|
||||
ucMBFrame[usLength++] = eException;
|
||||
}
|
||||
if( ( eMBCurrentMode == MB_ASCII ) && MB_ASCII_TIMEOUT_WAIT_BEFORE_SEND_MS )
|
||||
{
|
||||
vMBPortTimersDelay( MB_ASCII_TIMEOUT_WAIT_BEFORE_SEND_MS );
|
||||
}
|
||||
eStatus = peMBFrameSendCur( ucMBAddress, ucMBFrame, usLength );
|
||||
}
|
||||
break;
|
||||
|
||||
case EV_FRAME_SENT:
|
||||
break;
|
||||
}
|
||||
}
|
||||
return MB_ENOERR;
|
||||
}
|
||||
@@ -0,0 +1,416 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _MB_H
|
||||
#define _MB_H
|
||||
|
||||
#include "port.h"
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_BEGIN_EXTERN_C
|
||||
#endif
|
||||
|
||||
#include "mbport.h"
|
||||
#include "mbproto.h"
|
||||
|
||||
/*! \defgroup modbus Modbus
|
||||
* \code #include "mb.h" \endcode
|
||||
*
|
||||
* This module defines the interface for the application. It contains
|
||||
* the basic functions and types required to use the Modbus protocol stack.
|
||||
* A typical application will want to call eMBInit() first. If the device
|
||||
* is ready to answer network requests it must then call eMBEnable() to activate
|
||||
* the protocol stack. In the main loop the function eMBPoll() must be called
|
||||
* periodically. The time interval between pooling depends on the configured
|
||||
* Modbus timeout. If an RTOS is available a separate task should be created
|
||||
* and the task should always call the function eMBPoll().
|
||||
*
|
||||
* \code
|
||||
* // Initialize protocol stack in RTU mode for a slave with address 10 = 0x0A
|
||||
* eMBInit( MB_RTU, 0x0A, 38400, MB_PAR_EVEN );
|
||||
* // Enable the Modbus Protocol Stack.
|
||||
* eMBEnable( );
|
||||
* for( ;; )
|
||||
* {
|
||||
* // Call the main polling loop of the Modbus protocol stack.
|
||||
* eMBPoll( );
|
||||
* ...
|
||||
* }
|
||||
* \endcode
|
||||
*/
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
|
||||
/*! \ingroup modbus
|
||||
* \brief Use the default Modbus TCP port (502)
|
||||
*/
|
||||
#define MB_TCP_PORT_USE_DEFAULT 0
|
||||
|
||||
/* ----------------------- Type definitions ---------------------------------*/
|
||||
|
||||
/*! \ingroup modbus
|
||||
* \brief Modbus serial transmission modes (RTU/ASCII).
|
||||
*
|
||||
* Modbus serial supports two transmission modes. Either ASCII or RTU. RTU
|
||||
* is faster but has more hardware requirements and requires a network with
|
||||
* a low jitter. ASCII is slower and more reliable on slower links (E.g. modems)
|
||||
*/
|
||||
typedef enum
|
||||
{
|
||||
MB_RTU, /*!< RTU transmission mode. */
|
||||
MB_ASCII, /*!< ASCII transmission mode. */
|
||||
MB_TCP /*!< TCP mode. */
|
||||
} eMBMode;
|
||||
|
||||
/*! \ingroup modbus
|
||||
* \brief If register should be written or read.
|
||||
*
|
||||
* This value is passed to the callback functions which support either
|
||||
* reading or writing register values. Writing means that the application
|
||||
* registers should be updated and reading means that the modbus protocol
|
||||
* stack needs to know the current register values.
|
||||
*
|
||||
* \see eMBRegHoldingCB( ), eMBRegCoilsCB( ), eMBRegDiscreteCB( ) and
|
||||
* eMBRegInputCB( ).
|
||||
*/
|
||||
typedef enum
|
||||
{
|
||||
MB_REG_READ, /*!< Read register values and pass to protocol stack. */
|
||||
MB_REG_WRITE /*!< Update register values. */
|
||||
} eMBRegisterMode;
|
||||
|
||||
/*! \ingroup modbus
|
||||
* \brief Errorcodes used by all function in the protocol stack.
|
||||
*/
|
||||
typedef enum
|
||||
{
|
||||
MB_ENOERR, /*!< no error. */
|
||||
MB_ENOREG, /*!< illegal register address. */
|
||||
MB_EINVAL, /*!< illegal argument. */
|
||||
MB_EPORTERR, /*!< porting layer error. */
|
||||
MB_ENORES, /*!< insufficient resources. */
|
||||
MB_EIO, /*!< I/O error. */
|
||||
MB_EILLSTATE, /*!< protocol stack in illegal state. */
|
||||
MB_ETIMEDOUT /*!< timeout error occurred. */
|
||||
} eMBErrorCode;
|
||||
|
||||
|
||||
/* ----------------------- Function prototypes ------------------------------*/
|
||||
/*! \ingroup modbus
|
||||
* \brief Initialize the Modbus protocol stack.
|
||||
*
|
||||
* This functions initializes the ASCII or RTU module and calls the
|
||||
* init functions of the porting layer to prepare the hardware. Please
|
||||
* note that the receiver is still disabled and no Modbus frames are
|
||||
* processed until eMBEnable( ) has been called.
|
||||
*
|
||||
* \param eMode If ASCII or RTU mode should be used.
|
||||
* \param ucSlaveAddress The slave address. Only frames sent to this
|
||||
* address or to the broadcast address are processed.
|
||||
* \param ucPort The port to use. E.g. 1 for COM1 on windows. This value
|
||||
* is platform dependent and some ports simply choose to ignore it.
|
||||
* \param ulBaudRate The baudrate. E.g. 19200. Supported baudrates depend
|
||||
* on the porting layer.
|
||||
* \param eParity Parity used for serial transmission.
|
||||
*
|
||||
* \return If no error occurs the function returns eMBErrorCode::MB_ENOERR.
|
||||
* The protocol is then in the disabled state and ready for activation
|
||||
* by calling eMBEnable( ). Otherwise one of the following error codes
|
||||
* is returned:
|
||||
* - eMBErrorCode::MB_EINVAL If the slave address was not valid. Valid
|
||||
* slave addresses are in the range 1 - 247.
|
||||
* - eMBErrorCode::MB_EPORTERR IF the porting layer returned an error.
|
||||
*/
|
||||
eMBErrorCode eMBInit( eMBMode eMode, UCHAR ucSlaveAddress,
|
||||
UCHAR ucPort, ULONG ulBaudRate, eMBParity eParity );
|
||||
|
||||
/*! \ingroup modbus
|
||||
* \brief Initialize the Modbus protocol stack for Modbus TCP.
|
||||
*
|
||||
* This function initializes the Modbus TCP Module. Please note that
|
||||
* frame processing is still disabled until eMBEnable( ) is called.
|
||||
*
|
||||
* \param usTCPPort The TCP port to listen on.
|
||||
* \return If the protocol stack has been initialized correctly the function
|
||||
* returns eMBErrorCode::MB_ENOERR. Otherwise one of the following error
|
||||
* codes is returned:
|
||||
* - eMBErrorCode::MB_EINVAL If the slave address was not valid. Valid
|
||||
* slave addresses are in the range 1 - 247.
|
||||
* - eMBErrorCode::MB_EPORTERR IF the porting layer returned an error.
|
||||
*/
|
||||
eMBErrorCode eMBTCPInit( USHORT usTCPPort );
|
||||
|
||||
/*! \ingroup modbus
|
||||
* \brief Release resources used by the protocol stack.
|
||||
*
|
||||
* This function disables the Modbus protocol stack and release all
|
||||
* hardware resources. It must only be called when the protocol stack
|
||||
* is disabled.
|
||||
*
|
||||
* \note Note all ports implement this function. A port which wants to
|
||||
* get an callback must define the macro MB_PORT_HAS_CLOSE to 1.
|
||||
*
|
||||
* \return If the resources where released it return eMBErrorCode::MB_ENOERR.
|
||||
* If the protocol stack is not in the disabled state it returns
|
||||
* eMBErrorCode::MB_EILLSTATE.
|
||||
*/
|
||||
eMBErrorCode eMBClose( void );
|
||||
|
||||
/*! \ingroup modbus
|
||||
* \brief Enable the Modbus protocol stack.
|
||||
*
|
||||
* This function enables processing of Modbus frames. Enabling the protocol
|
||||
* stack is only possible if it is in the disabled state.
|
||||
*
|
||||
* \return If the protocol stack is now in the state enabled it returns
|
||||
* eMBErrorCode::MB_ENOERR. If it was not in the disabled state it
|
||||
* return eMBErrorCode::MB_EILLSTATE.
|
||||
*/
|
||||
eMBErrorCode eMBEnable( void );
|
||||
|
||||
/*! \ingroup modbus
|
||||
* \brief Disable the Modbus protocol stack.
|
||||
*
|
||||
* This function disables processing of Modbus frames.
|
||||
*
|
||||
* \return If the protocol stack has been disabled it returns
|
||||
* eMBErrorCode::MB_ENOERR. If it was not in the enabled state it returns
|
||||
* eMBErrorCode::MB_EILLSTATE.
|
||||
*/
|
||||
eMBErrorCode eMBDisable( void );
|
||||
|
||||
/*! \ingroup modbus
|
||||
* \brief The main pooling loop of the Modbus protocol stack.
|
||||
*
|
||||
* This function must be called periodically. The timer interval required
|
||||
* is given by the application dependent Modbus slave timeout. Internally the
|
||||
* function calls xMBPortEventGet() and waits for an event from the receiver or
|
||||
* transmitter state machines.
|
||||
*
|
||||
* \return If the protocol stack is not in the enabled state the function
|
||||
* returns eMBErrorCode::MB_EILLSTATE. Otherwise it returns
|
||||
* eMBErrorCode::MB_ENOERR.
|
||||
*/
|
||||
eMBErrorCode eMBPoll( void );
|
||||
|
||||
/*! \ingroup modbus
|
||||
* \brief Configure the slave id of the device.
|
||||
*
|
||||
* This function should be called when the Modbus function <em>Report Slave ID</em>
|
||||
* is enabled ( By defining MB_FUNC_OTHER_REP_SLAVEID_ENABLED in mbconfig.h ).
|
||||
*
|
||||
* \param ucSlaveID Values is returned in the <em>Slave ID</em> byte of the
|
||||
* <em>Report Slave ID</em> response.
|
||||
* \param xIsRunning If TRUE the <em>Run Indicator Status</em> byte is set to 0xFF.
|
||||
* otherwise the <em>Run Indicator Status</em> is 0x00.
|
||||
* \param pucAdditional Values which should be returned in the <em>Additional</em>
|
||||
* bytes of the <em> Report Slave ID</em> response.
|
||||
* \param usAdditionalLen Length of the buffer <code>pucAdditonal</code>.
|
||||
*
|
||||
* \return If the static buffer defined by MB_FUNC_OTHER_REP_SLAVEID_BUF in
|
||||
* mbconfig.h is to small it returns eMBErrorCode::MB_ENORES. Otherwise
|
||||
* it returns eMBErrorCode::MB_ENOERR.
|
||||
*/
|
||||
eMBErrorCode eMBSetSlaveID( UCHAR ucSlaveID, BOOL xIsRunning,
|
||||
UCHAR const *pucAdditional,
|
||||
USHORT usAdditionalLen );
|
||||
|
||||
/*! \ingroup modbus
|
||||
* \brief Registers a callback handler for a given function code.
|
||||
*
|
||||
* This function registers a new callback handler for a given function code.
|
||||
* The callback handler supplied is responsible for interpreting the Modbus PDU and
|
||||
* the creation of an appropriate response. In case of an error it should return
|
||||
* one of the possible Modbus exceptions which results in a Modbus exception frame
|
||||
* sent by the protocol stack.
|
||||
*
|
||||
* \param ucFunctionCode The Modbus function code for which this handler should
|
||||
* be registers. Valid function codes are in the range 1 to 127.
|
||||
* \param pxHandler The function handler which should be called in case
|
||||
* such a frame is received. If \c NULL a previously registered function handler
|
||||
* for this function code is removed.
|
||||
*
|
||||
* \return eMBErrorCode::MB_ENOERR if the handler has been installed. If no
|
||||
* more resources are available it returns eMBErrorCode::MB_ENORES. In this
|
||||
* case the values in mbconfig.h should be adjusted. If the argument was not
|
||||
* valid it returns eMBErrorCode::MB_EINVAL.
|
||||
*/
|
||||
eMBErrorCode eMBRegisterCB( UCHAR ucFunctionCode,
|
||||
pxMBFunctionHandler pxHandler );
|
||||
|
||||
/* ----------------------- Callback -----------------------------------------*/
|
||||
|
||||
/*! \defgroup modbus_registers Modbus Registers
|
||||
* \code #include "mb.h" \endcode
|
||||
* The protocol stack does not internally allocate any memory for the
|
||||
* registers. This makes the protocol stack very small and also usable on
|
||||
* low end targets. In addition the values don't have to be in the memory
|
||||
* and could for example be stored in a flash.<br>
|
||||
* Whenever the protocol stack requires a value it calls one of the callback
|
||||
* function with the register address and the number of registers to read
|
||||
* as an argument. The application should then read the actual register values
|
||||
* (for example the ADC voltage) and should store the result in the supplied
|
||||
* buffer.<br>
|
||||
* If the protocol stack wants to update a register value because a write
|
||||
* register function was received a buffer with the new register values is
|
||||
* passed to the callback function. The function should then use these values
|
||||
* to update the application register values.
|
||||
*/
|
||||
|
||||
/*! \ingroup modbus_registers
|
||||
* \brief Callback function used if the value of a <em>Input Register</em>
|
||||
* is required by the protocol stack. The starting register address is given
|
||||
* by \c usAddress and the last register is given by <tt>usAddress +
|
||||
* usNRegs - 1</tt>.
|
||||
*
|
||||
* \param pucRegBuffer A buffer where the callback function should write
|
||||
* the current value of the modbus registers to.
|
||||
* \param usAddress The starting address of the register. Input registers
|
||||
* are in the range 1 - 65535.
|
||||
* \param usNRegs Number of registers the callback function must supply.
|
||||
*
|
||||
* \return The function must return one of the following error codes:
|
||||
* - eMBErrorCode::MB_ENOERR If no error occurred. In this case a normal
|
||||
* Modbus response is sent.
|
||||
* - eMBErrorCode::MB_ENOREG If the application can not supply values
|
||||
* for registers within this range. In this case a
|
||||
* <b>ILLEGAL DATA ADDRESS</b> exception frame is sent as a response.
|
||||
* - eMBErrorCode::MB_ETIMEDOUT If the requested register block is
|
||||
* currently not available and the application dependent response
|
||||
* timeout would be violated. In this case a <b>SLAVE DEVICE BUSY</b>
|
||||
* exception is sent as a response.
|
||||
* - eMBErrorCode::MB_EIO If an unrecoverable error occurred. In this case
|
||||
* a <b>SLAVE DEVICE FAILURE</b> exception is sent as a response.
|
||||
*/
|
||||
eMBErrorCode eMBRegInputCB( UCHAR * pucRegBuffer, USHORT usAddress,
|
||||
USHORT usNRegs );
|
||||
|
||||
/*! \ingroup modbus_registers
|
||||
* \brief Callback function used if a <em>Holding Register</em> value is
|
||||
* read or written by the protocol stack. The starting register address
|
||||
* is given by \c usAddress and the last register is given by
|
||||
* <tt>usAddress + usNRegs - 1</tt>.
|
||||
*
|
||||
* \param pucRegBuffer If the application registers values should be updated the
|
||||
* buffer points to the new registers values. If the protocol stack needs
|
||||
* to now the current values the callback function should write them into
|
||||
* this buffer.
|
||||
* \param usAddress The starting address of the register.
|
||||
* \param usNRegs Number of registers to read or write.
|
||||
* \param eMode If eMBRegisterMode::MB_REG_WRITE the application register
|
||||
* values should be updated from the values in the buffer. For example
|
||||
* this would be the case when the Modbus master has issued an
|
||||
* <b>WRITE SINGLE REGISTER</b> command.
|
||||
* If the value eMBRegisterMode::MB_REG_READ the application should copy
|
||||
* the current values into the buffer \c pucRegBuffer.
|
||||
*
|
||||
* \return The function must return one of the following error codes:
|
||||
* - eMBErrorCode::MB_ENOERR If no error occurred. In this case a normal
|
||||
* Modbus response is sent.
|
||||
* - eMBErrorCode::MB_ENOREG If the application can not supply values
|
||||
* for registers within this range. In this case a
|
||||
* <b>ILLEGAL DATA ADDRESS</b> exception frame is sent as a response.
|
||||
* - eMBErrorCode::MB_ETIMEDOUT If the requested register block is
|
||||
* currently not available and the application dependent response
|
||||
* timeout would be violated. In this case a <b>SLAVE DEVICE BUSY</b>
|
||||
* exception is sent as a response.
|
||||
* - eMBErrorCode::MB_EIO If an unrecoverable error occurred. In this case
|
||||
* a <b>SLAVE DEVICE FAILURE</b> exception is sent as a response.
|
||||
*/
|
||||
eMBErrorCode eMBRegHoldingCB( UCHAR * pucRegBuffer, USHORT usAddress,
|
||||
USHORT usNRegs, eMBRegisterMode eMode );
|
||||
|
||||
/*! \ingroup modbus_registers
|
||||
* \brief Callback function used if a <em>Coil Register</em> value is
|
||||
* read or written by the protocol stack. If you are going to use
|
||||
* this function you might use the functions xMBUtilSetBits( ) and
|
||||
* xMBUtilGetBits( ) for working with bitfields.
|
||||
*
|
||||
* \param pucRegBuffer The bits are packed in bytes where the first coil
|
||||
* starting at address \c usAddress is stored in the LSB of the
|
||||
* first byte in the buffer <code>pucRegBuffer</code>.
|
||||
* If the buffer should be written by the callback function unused
|
||||
* coil values (I.e. if not a multiple of eight coils is used) should be set
|
||||
* to zero.
|
||||
* \param usAddress The first coil number.
|
||||
* \param usNCoils Number of coil values requested.
|
||||
* \param eMode If eMBRegisterMode::MB_REG_WRITE the application values should
|
||||
* be updated from the values supplied in the buffer \c pucRegBuffer.
|
||||
* If eMBRegisterMode::MB_REG_READ the application should store the current
|
||||
* values in the buffer \c pucRegBuffer.
|
||||
*
|
||||
* \return The function must return one of the following error codes:
|
||||
* - eMBErrorCode::MB_ENOERR If no error occurred. In this case a normal
|
||||
* Modbus response is sent.
|
||||
* - eMBErrorCode::MB_ENOREG If the application does not map an coils
|
||||
* within the requested address range. In this case a
|
||||
* <b>ILLEGAL DATA ADDRESS</b> is sent as a response.
|
||||
* - eMBErrorCode::MB_ETIMEDOUT If the requested register block is
|
||||
* currently not available and the application dependent response
|
||||
* timeout would be violated. In this case a <b>SLAVE DEVICE BUSY</b>
|
||||
* exception is sent as a response.
|
||||
* - eMBErrorCode::MB_EIO If an unrecoverable error occurred. In this case
|
||||
* a <b>SLAVE DEVICE FAILURE</b> exception is sent as a response.
|
||||
*/
|
||||
eMBErrorCode eMBRegCoilsCB( UCHAR * pucRegBuffer, USHORT usAddress,
|
||||
USHORT usNCoils, eMBRegisterMode eMode );
|
||||
|
||||
/*! \ingroup modbus_registers
|
||||
* \brief Callback function used if a <em>Input Discrete Register</em> value is
|
||||
* read by the protocol stack.
|
||||
*
|
||||
* If you are going to use his function you might use the functions
|
||||
* xMBUtilSetBits( ) and xMBUtilGetBits( ) for working with bitfields.
|
||||
*
|
||||
* \param pucRegBuffer The buffer should be updated with the current
|
||||
* coil values. The first discrete input starting at \c usAddress must be
|
||||
* stored at the LSB of the first byte in the buffer. If the requested number
|
||||
* is not a multiple of eight the remaining bits should be set to zero.
|
||||
* \param usAddress The starting address of the first discrete input.
|
||||
* \param usNDiscrete Number of discrete input values.
|
||||
* \return The function must return one of the following error codes:
|
||||
* - eMBErrorCode::MB_ENOERR If no error occurred. In this case a normal
|
||||
* Modbus response is sent.
|
||||
* - eMBErrorCode::MB_ENOREG If no such discrete inputs exists.
|
||||
* In this case a <b>ILLEGAL DATA ADDRESS</b> exception frame is sent
|
||||
* as a response.
|
||||
* - eMBErrorCode::MB_ETIMEDOUT If the requested register block is
|
||||
* currently not available and the application dependent response
|
||||
* timeout would be violated. In this case a <b>SLAVE DEVICE BUSY</b>
|
||||
* exception is sent as a response.
|
||||
* - eMBErrorCode::MB_EIO If an unrecoverable error occurred. In this case
|
||||
* a <b>SLAVE DEVICE FAILURE</b> exception is sent as a response.
|
||||
*/
|
||||
eMBErrorCode eMBRegDiscreteCB( UCHAR * pucRegBuffer, USHORT usAddress,
|
||||
USHORT usNDiscrete );
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_END_EXTERN_C
|
||||
#endif
|
||||
#endif
|
||||
@@ -0,0 +1,131 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _MB_CONFIG_H
|
||||
#define _MB_CONFIG_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_BEGIN_EXTERN_C
|
||||
#endif
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
/*! \defgroup modbus_cfg Modbus Configuration
|
||||
*
|
||||
* Most modules in the protocol stack are completly optional and can be
|
||||
* excluded. This is specially important if target resources are very small
|
||||
* and program memory space should be saved.<br>
|
||||
*
|
||||
* All of these settings are available in the file <code>mbconfig.h</code>
|
||||
*/
|
||||
/*! \addtogroup modbus_cfg
|
||||
* @{
|
||||
*/
|
||||
/*! \brief If Modbus ASCII support is enabled. */
|
||||
#define MB_ASCII_ENABLED ( 0 )
|
||||
|
||||
/*! \brief If Modbus RTU support is enabled. */
|
||||
#define MB_RTU_ENABLED ( 0 )
|
||||
|
||||
/*! \brief If Modbus TCP support is enabled. */
|
||||
#define MB_TCP_ENABLED ( 1 )
|
||||
|
||||
/*! \brief The character timeout value for Modbus ASCII.
|
||||
*
|
||||
* The character timeout value is not fixed for Modbus ASCII and is therefore
|
||||
* a configuration option. It should be set to the maximum expected delay
|
||||
* time of the network.
|
||||
*/
|
||||
#define MB_ASCII_TIMEOUT_SEC ( 1 )
|
||||
|
||||
/*! \brief Timeout to wait in ASCII prior to enabling transmitter.
|
||||
*
|
||||
* If defined the function calls vMBPortSerialDelay with the argument
|
||||
* MB_ASCII_TIMEOUT_WAIT_BEFORE_SEND_MS to allow for a delay before
|
||||
* the serial transmitter is enabled. This is required because some
|
||||
* targets are so fast that there is no time between receiving and
|
||||
* transmitting the frame. If the master is to slow with enabling its
|
||||
* receiver then he will not receive the response correctly.
|
||||
*/
|
||||
#ifndef MB_ASCII_TIMEOUT_WAIT_BEFORE_SEND_MS
|
||||
#define MB_ASCII_TIMEOUT_WAIT_BEFORE_SEND_MS ( 0 )
|
||||
#endif
|
||||
|
||||
/*! \brief Maximum number of Modbus functions codes the protocol stack
|
||||
* should support.
|
||||
*
|
||||
* The maximum number of supported Modbus functions must be greater than
|
||||
* the sum of all enabled functions in this file and custom function
|
||||
* handlers. If set to small adding more functions will fail.
|
||||
*/
|
||||
#define MB_FUNC_HANDLERS_MAX ( 16 )
|
||||
|
||||
/*! \brief Number of bytes which should be allocated for the <em>Report Slave ID
|
||||
* </em>command.
|
||||
*
|
||||
* This number limits the maximum size of the additional segment in the
|
||||
* report slave id function. See eMBSetSlaveID( ) for more information on
|
||||
* how to set this value. It is only used if MB_FUNC_OTHER_REP_SLAVEID_ENABLED
|
||||
* is set to <code>1</code>.
|
||||
*/
|
||||
#define MB_FUNC_OTHER_REP_SLAVEID_BUF ( 32 )
|
||||
|
||||
/*! \brief If the <em>Report Slave ID</em> function should be enabled. */
|
||||
#define MB_FUNC_OTHER_REP_SLAVEID_ENABLED ( 1 )
|
||||
|
||||
/*! \brief If the <em>Read Input Registers</em> function should be enabled. */
|
||||
#define MB_FUNC_READ_INPUT_ENABLED ( 1 )
|
||||
|
||||
/*! \brief If the <em>Read Holding Registers</em> function should be enabled. */
|
||||
#define MB_FUNC_READ_HOLDING_ENABLED ( 1 )
|
||||
|
||||
/*! \brief If the <em>Write Single Register</em> function should be enabled. */
|
||||
#define MB_FUNC_WRITE_HOLDING_ENABLED ( 1 )
|
||||
|
||||
/*! \brief If the <em>Write Multiple registers</em> function should be enabled. */
|
||||
#define MB_FUNC_WRITE_MULTIPLE_HOLDING_ENABLED ( 1 )
|
||||
|
||||
/*! \brief If the <em>Read Coils</em> function should be enabled. */
|
||||
#define MB_FUNC_READ_COILS_ENABLED ( 1 )
|
||||
|
||||
/*! \brief If the <em>Write Coils</em> function should be enabled. */
|
||||
#define MB_FUNC_WRITE_COIL_ENABLED ( 1 )
|
||||
|
||||
/*! \brief If the <em>Write Multiple Coils</em> function should be enabled. */
|
||||
#define MB_FUNC_WRITE_MULTIPLE_COILS_ENABLED ( 1 )
|
||||
|
||||
/*! \brief If the <em>Read Discrete Inputs</em> function should be enabled. */
|
||||
#define MB_FUNC_READ_DISCRETE_INPUTS_ENABLED ( 1 )
|
||||
|
||||
/*! \brief If the <em>Read/Write Multiple Registers</em> function should be enabled. */
|
||||
#define MB_FUNC_READWRITE_HOLDING_ENABLED ( 1 )
|
||||
|
||||
/*! @} */
|
||||
#ifdef __cplusplus
|
||||
PR_END_EXTERN_C
|
||||
#endif
|
||||
#endif
|
||||
@@ -0,0 +1,86 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _MB_FRAME_H
|
||||
#define _MB_FRAME_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_BEGIN_EXTERN_C
|
||||
#endif
|
||||
|
||||
/*!
|
||||
* Constants which defines the format of a modbus frame. The example is
|
||||
* shown for a Modbus RTU/ASCII frame. Note that the Modbus PDU is not
|
||||
* dependent on the underlying transport.
|
||||
*
|
||||
* <code>
|
||||
* <------------------------ MODBUS SERIAL LINE PDU (1) ------------------->
|
||||
* <----------- MODBUS PDU (1') ---------------->
|
||||
* +-----------+---------------+----------------------------+-------------+
|
||||
* | Address | Function Code | Data | CRC/LRC |
|
||||
* +-----------+---------------+----------------------------+-------------+
|
||||
* | | | |
|
||||
* (2) (3/2') (3') (4)
|
||||
*
|
||||
* (1) ... MB_SER_PDU_SIZE_MAX = 256
|
||||
* (2) ... MB_SER_PDU_ADDR_OFF = 0
|
||||
* (3) ... MB_SER_PDU_PDU_OFF = 1
|
||||
* (4) ... MB_SER_PDU_SIZE_CRC = 2
|
||||
*
|
||||
* (1') ... MB_PDU_SIZE_MAX = 253
|
||||
* (2') ... MB_PDU_FUNC_OFF = 0
|
||||
* (3') ... MB_PDU_DATA_OFF = 1
|
||||
* </code>
|
||||
*/
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define MB_PDU_SIZE_MAX 253 /*!< Maximum size of a PDU. */
|
||||
#define MB_PDU_SIZE_MIN 1 /*!< Function Code */
|
||||
#define MB_PDU_FUNC_OFF 0 /*!< Offset of function code in PDU. */
|
||||
#define MB_PDU_DATA_OFF 1 /*!< Offset for response data in PDU. */
|
||||
|
||||
/* ----------------------- Prototypes 0-------------------------------------*/
|
||||
typedef void ( *pvMBFrameStart ) ( void );
|
||||
|
||||
typedef void ( *pvMBFrameStop ) ( void );
|
||||
|
||||
typedef eMBErrorCode( *peMBFrameReceive ) ( UCHAR * pucRcvAddress,
|
||||
UCHAR ** pucFrame,
|
||||
USHORT * pusLength );
|
||||
|
||||
typedef eMBErrorCode( *peMBFrameSend ) ( UCHAR slaveAddress,
|
||||
const UCHAR * pucFrame,
|
||||
USHORT usLength );
|
||||
|
||||
typedef void( *pvMBFrameClose ) ( void );
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_END_EXTERN_C
|
||||
#endif
|
||||
#endif
|
||||
@@ -0,0 +1,79 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _MB_FUNC_H
|
||||
#define _MB_FUNC_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_BEGIN_EXTERN_C
|
||||
#endif
|
||||
#if MB_FUNC_OTHER_REP_SLAVEID_BUF > 0
|
||||
eMBException eMBFuncReportSlaveID( UCHAR * pucFrame, USHORT * usLen );
|
||||
#endif
|
||||
|
||||
#if MB_FUNC_READ_INPUT_ENABLED > 0
|
||||
eMBException eMBFuncReadInputRegister( UCHAR * pucFrame, USHORT * usLen );
|
||||
#endif
|
||||
|
||||
#if MB_FUNC_READ_HOLDING_ENABLED > 0
|
||||
eMBException eMBFuncReadHoldingRegister( UCHAR * pucFrame, USHORT * usLen );
|
||||
#endif
|
||||
|
||||
#if MB_FUNC_WRITE_HOLDING_ENABLED > 0
|
||||
eMBException eMBFuncWriteHoldingRegister( UCHAR * pucFrame, USHORT * usLen );
|
||||
#endif
|
||||
|
||||
#if MB_FUNC_WRITE_MULTIPLE_HOLDING_ENABLED > 0
|
||||
eMBException eMBFuncWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen );
|
||||
#endif
|
||||
|
||||
#if MB_FUNC_READ_COILS_ENABLED > 0
|
||||
eMBException eMBFuncReadCoils( UCHAR * pucFrame, USHORT * usLen );
|
||||
#endif
|
||||
|
||||
#if MB_FUNC_WRITE_COIL_ENABLED > 0
|
||||
eMBException eMBFuncWriteCoil( UCHAR * pucFrame, USHORT * usLen );
|
||||
#endif
|
||||
|
||||
#if MB_FUNC_WRITE_MULTIPLE_COILS_ENABLED > 0
|
||||
eMBException eMBFuncWriteMultipleCoils( UCHAR * pucFrame, USHORT * usLen );
|
||||
#endif
|
||||
|
||||
#if MB_FUNC_READ_DISCRETE_INPUTS_ENABLED > 0
|
||||
eMBException eMBFuncReadDiscreteInputs( UCHAR * pucFrame, USHORT * usLen );
|
||||
#endif
|
||||
|
||||
#if MB_FUNC_READWRITE_HOLDING_ENABLED > 0
|
||||
eMBException eMBFuncReadWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen );
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_END_EXTERN_C
|
||||
#endif
|
||||
#endif
|
||||
@@ -0,0 +1,269 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbframe.h"
|
||||
#include "mbproto.h"
|
||||
#include "mbconfig.h"
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define MB_PDU_FUNC_READ_ADDR_OFF ( MB_PDU_DATA_OFF )
|
||||
#define MB_PDU_FUNC_READ_COILCNT_OFF ( MB_PDU_DATA_OFF + 2 )
|
||||
#define MB_PDU_FUNC_READ_SIZE ( 4 )
|
||||
#define MB_PDU_FUNC_READ_COILCNT_MAX ( 0x07D0 )
|
||||
|
||||
#define MB_PDU_FUNC_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF )
|
||||
#define MB_PDU_FUNC_WRITE_VALUE_OFF ( MB_PDU_DATA_OFF + 2 )
|
||||
#define MB_PDU_FUNC_WRITE_SIZE ( 4 )
|
||||
|
||||
#define MB_PDU_FUNC_WRITE_MUL_ADDR_OFF ( MB_PDU_DATA_OFF )
|
||||
#define MB_PDU_FUNC_WRITE_MUL_COILCNT_OFF ( MB_PDU_DATA_OFF + 2 )
|
||||
#define MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF ( MB_PDU_DATA_OFF + 4 )
|
||||
#define MB_PDU_FUNC_WRITE_MUL_VALUES_OFF ( MB_PDU_DATA_OFF + 5 )
|
||||
#define MB_PDU_FUNC_WRITE_MUL_SIZE_MIN ( 5 )
|
||||
#define MB_PDU_FUNC_WRITE_MUL_COILCNT_MAX ( 0x07B0 )
|
||||
|
||||
/* ----------------------- Static functions ---------------------------------*/
|
||||
eMBException prveMBError2Exception( eMBErrorCode eErrorCode );
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
|
||||
#if MB_FUNC_READ_COILS_ENABLED > 0
|
||||
|
||||
eMBException
|
||||
eMBFuncReadCoils( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
USHORT usCoilCount;
|
||||
UCHAR ucNBytes;
|
||||
UCHAR *pucFrameCur;
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen == ( MB_PDU_FUNC_READ_SIZE + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF + 1] );
|
||||
usRegAddress++;
|
||||
|
||||
usCoilCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_COILCNT_OFF] << 8 );
|
||||
usCoilCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_COILCNT_OFF + 1] );
|
||||
|
||||
/* Check if the number of registers to read is valid. If not
|
||||
* return Modbus illegal data value exception.
|
||||
*/
|
||||
if( ( usCoilCount >= 1 ) &&
|
||||
( usCoilCount < MB_PDU_FUNC_READ_COILCNT_MAX ) )
|
||||
{
|
||||
/* Set the current PDU data pointer to the beginning. */
|
||||
pucFrameCur = &pucFrame[MB_PDU_FUNC_OFF];
|
||||
*usLen = MB_PDU_FUNC_OFF;
|
||||
|
||||
/* First byte contains the function code. */
|
||||
*pucFrameCur++ = MB_FUNC_READ_COILS;
|
||||
*usLen += 1;
|
||||
|
||||
/* Test if the quantity of coils is a multiple of 8. If not last
|
||||
* byte is only partially field with unused coils set to zero. */
|
||||
if( ( usCoilCount & 0x0007 ) != 0 )
|
||||
{
|
||||
ucNBytes = ( UCHAR )( usCoilCount / 8 + 1 );
|
||||
}
|
||||
else
|
||||
{
|
||||
ucNBytes = ( UCHAR )( usCoilCount / 8 );
|
||||
}
|
||||
*pucFrameCur++ = ucNBytes;
|
||||
*usLen += 1;
|
||||
|
||||
eRegStatus =
|
||||
eMBRegCoilsCB( pucFrameCur, usRegAddress, usCoilCount,
|
||||
MB_REG_READ );
|
||||
|
||||
/* If an error occured convert it into a Modbus exception. */
|
||||
if( eRegStatus != MB_ENOERR )
|
||||
{
|
||||
eStatus = prveMBError2Exception( eRegStatus );
|
||||
}
|
||||
else
|
||||
{
|
||||
/* The response contains the function code, the starting address
|
||||
* and the quantity of registers. We reuse the old values in the
|
||||
* buffer because they are still valid. */
|
||||
*usLen += ucNBytes;;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Can't be a valid read coil register request because the length
|
||||
* is incorrect. */
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
#if MB_FUNC_WRITE_COIL_ENABLED > 0
|
||||
eMBException
|
||||
eMBFuncWriteCoil( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
UCHAR ucBuf[2];
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen == ( MB_PDU_FUNC_WRITE_SIZE + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF + 1] );
|
||||
usRegAddress++;
|
||||
|
||||
if( ( pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF + 1] == 0x00 ) &&
|
||||
( ( pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF] == 0xFF ) ||
|
||||
( pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF] == 0x00 ) ) )
|
||||
{
|
||||
ucBuf[1] = 0;
|
||||
if( pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF] == 0xFF )
|
||||
{
|
||||
ucBuf[0] = 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
ucBuf[0] = 0;
|
||||
}
|
||||
eRegStatus =
|
||||
eMBRegCoilsCB( &ucBuf[0], usRegAddress, 1, MB_REG_WRITE );
|
||||
|
||||
/* If an error occured convert it into a Modbus exception. */
|
||||
if( eRegStatus != MB_ENOERR )
|
||||
{
|
||||
eStatus = prveMBError2Exception( eRegStatus );
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Can't be a valid write coil register request because the length
|
||||
* is incorrect. */
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
#if MB_FUNC_WRITE_MULTIPLE_COILS_ENABLED > 0
|
||||
eMBException
|
||||
eMBFuncWriteMultipleCoils( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
USHORT usCoilCnt;
|
||||
UCHAR ucByteCount;
|
||||
UCHAR ucByteCountVerify;
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen > ( MB_PDU_FUNC_WRITE_SIZE + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF + 1] );
|
||||
usRegAddress++;
|
||||
|
||||
usCoilCnt = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_COILCNT_OFF] << 8 );
|
||||
usCoilCnt |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_COILCNT_OFF + 1] );
|
||||
|
||||
ucByteCount = pucFrame[MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF];
|
||||
|
||||
/* Compute the number of expected bytes in the request. */
|
||||
if( ( usCoilCnt & 0x0007 ) != 0 )
|
||||
{
|
||||
ucByteCountVerify = ( UCHAR )( usCoilCnt / 8 + 1 );
|
||||
}
|
||||
else
|
||||
{
|
||||
ucByteCountVerify = ( UCHAR )( usCoilCnt / 8 );
|
||||
}
|
||||
|
||||
if( ( usCoilCnt >= 1 ) &&
|
||||
( usCoilCnt <= MB_PDU_FUNC_WRITE_MUL_COILCNT_MAX ) &&
|
||||
( ucByteCountVerify == ucByteCount ) )
|
||||
{
|
||||
eRegStatus =
|
||||
eMBRegCoilsCB( &pucFrame[MB_PDU_FUNC_WRITE_MUL_VALUES_OFF],
|
||||
usRegAddress, usCoilCnt, MB_REG_WRITE );
|
||||
|
||||
/* If an error occured convert it into a Modbus exception. */
|
||||
if( eRegStatus != MB_ENOERR )
|
||||
{
|
||||
eStatus = prveMBError2Exception( eRegStatus );
|
||||
}
|
||||
else
|
||||
{
|
||||
/* The response contains the function code, the starting address
|
||||
* and the quantity of registers. We reuse the old values in the
|
||||
* buffer because they are still valid. */
|
||||
*usLen = MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Can't be a valid write coil register request because the length
|
||||
* is incorrect. */
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,28 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
@@ -0,0 +1,133 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbframe.h"
|
||||
#include "mbproto.h"
|
||||
#include "mbconfig.h"
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define MB_PDU_FUNC_READ_ADDR_OFF ( MB_PDU_DATA_OFF )
|
||||
#define MB_PDU_FUNC_READ_DISCCNT_OFF ( MB_PDU_DATA_OFF + 2 )
|
||||
#define MB_PDU_FUNC_READ_SIZE ( 4 )
|
||||
#define MB_PDU_FUNC_READ_DISCCNT_MAX ( 0x07D0 )
|
||||
|
||||
/* ----------------------- Static functions ---------------------------------*/
|
||||
eMBException prveMBError2Exception( eMBErrorCode eErrorCode );
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
|
||||
#if MB_FUNC_READ_COILS_ENABLED > 0
|
||||
|
||||
eMBException
|
||||
eMBFuncReadDiscreteInputs( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
USHORT usDiscreteCnt;
|
||||
UCHAR ucNBytes;
|
||||
UCHAR *pucFrameCur;
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen == ( MB_PDU_FUNC_READ_SIZE + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF + 1] );
|
||||
usRegAddress++;
|
||||
|
||||
usDiscreteCnt = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_DISCCNT_OFF] << 8 );
|
||||
usDiscreteCnt |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_DISCCNT_OFF + 1] );
|
||||
|
||||
/* Check if the number of registers to read is valid. If not
|
||||
* return Modbus illegal data value exception.
|
||||
*/
|
||||
if( ( usDiscreteCnt >= 1 ) &&
|
||||
( usDiscreteCnt < MB_PDU_FUNC_READ_DISCCNT_MAX ) )
|
||||
{
|
||||
/* Set the current PDU data pointer to the beginning. */
|
||||
pucFrameCur = &pucFrame[MB_PDU_FUNC_OFF];
|
||||
*usLen = MB_PDU_FUNC_OFF;
|
||||
|
||||
/* First byte contains the function code. */
|
||||
*pucFrameCur++ = MB_FUNC_READ_DISCRETE_INPUTS;
|
||||
*usLen += 1;
|
||||
|
||||
/* Test if the quantity of coils is a multiple of 8. If not last
|
||||
* byte is only partially field with unused coils set to zero. */
|
||||
if( ( usDiscreteCnt & 0x0007 ) != 0 )
|
||||
{
|
||||
ucNBytes = ( UCHAR ) ( usDiscreteCnt / 8 + 1 );
|
||||
}
|
||||
else
|
||||
{
|
||||
ucNBytes = ( UCHAR ) ( usDiscreteCnt / 8 );
|
||||
}
|
||||
*pucFrameCur++ = ucNBytes;
|
||||
*usLen += 1;
|
||||
|
||||
eRegStatus =
|
||||
eMBRegDiscreteCB( pucFrameCur, usRegAddress, usDiscreteCnt );
|
||||
|
||||
/* If an error occured convert it into a Modbus exception. */
|
||||
if( eRegStatus != MB_ENOERR )
|
||||
{
|
||||
eStatus = prveMBError2Exception( eRegStatus );
|
||||
}
|
||||
else
|
||||
{
|
||||
/* The response contains the function code, the starting address
|
||||
* and the quantity of registers. We reuse the old values in the
|
||||
* buffer because they are still valid. */
|
||||
*usLen += ucNBytes;;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Can't be a valid read coil register request because the length
|
||||
* is incorrect. */
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,307 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbframe.h"
|
||||
#include "mbproto.h"
|
||||
#include "mbconfig.h"
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define MB_PDU_FUNC_READ_ADDR_OFF ( MB_PDU_DATA_OFF + 0)
|
||||
#define MB_PDU_FUNC_READ_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 )
|
||||
#define MB_PDU_FUNC_READ_SIZE ( 4 )
|
||||
#define MB_PDU_FUNC_READ_REGCNT_MAX ( 0x007D )
|
||||
|
||||
#define MB_PDU_FUNC_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF + 0)
|
||||
#define MB_PDU_FUNC_WRITE_VALUE_OFF ( MB_PDU_DATA_OFF + 2 )
|
||||
#define MB_PDU_FUNC_WRITE_SIZE ( 4 )
|
||||
|
||||
#define MB_PDU_FUNC_WRITE_MUL_ADDR_OFF ( MB_PDU_DATA_OFF + 0 )
|
||||
#define MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 )
|
||||
#define MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF ( MB_PDU_DATA_OFF + 4 )
|
||||
#define MB_PDU_FUNC_WRITE_MUL_VALUES_OFF ( MB_PDU_DATA_OFF + 5 )
|
||||
#define MB_PDU_FUNC_WRITE_MUL_SIZE_MIN ( 5 )
|
||||
#define MB_PDU_FUNC_WRITE_MUL_REGCNT_MAX ( 0x0078 )
|
||||
|
||||
#define MB_PDU_FUNC_READWRITE_READ_ADDR_OFF ( MB_PDU_DATA_OFF + 0 )
|
||||
#define MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 )
|
||||
#define MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF ( MB_PDU_DATA_OFF + 4 )
|
||||
#define MB_PDU_FUNC_READWRITE_WRITE_REGCNT_OFF ( MB_PDU_DATA_OFF + 6 )
|
||||
#define MB_PDU_FUNC_READWRITE_BYTECNT_OFF ( MB_PDU_DATA_OFF + 8 )
|
||||
#define MB_PDU_FUNC_READWRITE_WRITE_VALUES_OFF ( MB_PDU_DATA_OFF + 9 )
|
||||
#define MB_PDU_FUNC_READWRITE_SIZE_MIN ( 9 )
|
||||
|
||||
/* ----------------------- Static functions ---------------------------------*/
|
||||
eMBException prveMBError2Exception( eMBErrorCode eErrorCode );
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
|
||||
#if MB_FUNC_WRITE_HOLDING_ENABLED > 0
|
||||
|
||||
eMBException
|
||||
eMBFuncWriteHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen == ( MB_PDU_FUNC_WRITE_SIZE + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_ADDR_OFF + 1] );
|
||||
usRegAddress++;
|
||||
|
||||
/* Make callback to update the value. */
|
||||
eRegStatus = eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_WRITE_VALUE_OFF],
|
||||
usRegAddress, 1, MB_REG_WRITE );
|
||||
|
||||
/* If an error occured convert it into a Modbus exception. */
|
||||
if( eRegStatus != MB_ENOERR )
|
||||
{
|
||||
eStatus = prveMBError2Exception( eRegStatus );
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Can't be a valid request because the length is incorrect. */
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if MB_FUNC_WRITE_MULTIPLE_HOLDING_ENABLED > 0
|
||||
eMBException
|
||||
eMBFuncWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
USHORT usRegCount;
|
||||
UCHAR ucRegByteCount;
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen >= ( MB_PDU_FUNC_WRITE_MUL_SIZE_MIN + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_ADDR_OFF + 1] );
|
||||
usRegAddress++;
|
||||
|
||||
usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF] << 8 );
|
||||
usRegCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_WRITE_MUL_REGCNT_OFF + 1] );
|
||||
|
||||
ucRegByteCount = pucFrame[MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF];
|
||||
|
||||
if( ( usRegCount >= 1 ) &&
|
||||
( usRegCount <= MB_PDU_FUNC_WRITE_MUL_REGCNT_MAX ) &&
|
||||
( ucRegByteCount == ( UCHAR ) ( 2 * usRegCount ) ) )
|
||||
{
|
||||
/* Make callback to update the register values. */
|
||||
eRegStatus =
|
||||
eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_WRITE_MUL_VALUES_OFF],
|
||||
usRegAddress, usRegCount, MB_REG_WRITE );
|
||||
|
||||
/* If an error occured convert it into a Modbus exception. */
|
||||
if( eRegStatus != MB_ENOERR )
|
||||
{
|
||||
eStatus = prveMBError2Exception( eRegStatus );
|
||||
}
|
||||
else
|
||||
{
|
||||
/* The response contains the function code, the starting
|
||||
* address and the quantity of registers. We reuse the
|
||||
* old values in the buffer because they are still valid.
|
||||
*/
|
||||
*usLen = MB_PDU_FUNC_WRITE_MUL_BYTECNT_OFF;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Can't be a valid request because the length is incorrect. */
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if MB_FUNC_READ_HOLDING_ENABLED > 0
|
||||
|
||||
eMBException
|
||||
eMBFuncReadHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
USHORT usRegCount;
|
||||
UCHAR *pucFrameCur;
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen == ( MB_PDU_FUNC_READ_SIZE + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF + 1] );
|
||||
usRegAddress++;
|
||||
|
||||
usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF] << 8 );
|
||||
usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF + 1] );
|
||||
|
||||
/* Check if the number of registers to read is valid. If not
|
||||
* return Modbus illegal data value exception.
|
||||
*/
|
||||
if( ( usRegCount >= 1 ) && ( usRegCount <= MB_PDU_FUNC_READ_REGCNT_MAX ) )
|
||||
{
|
||||
/* Set the current PDU data pointer to the beginning. */
|
||||
pucFrameCur = &pucFrame[MB_PDU_FUNC_OFF];
|
||||
*usLen = MB_PDU_FUNC_OFF;
|
||||
|
||||
/* First byte contains the function code. */
|
||||
*pucFrameCur++ = MB_FUNC_READ_HOLDING_REGISTER;
|
||||
*usLen += 1;
|
||||
|
||||
/* Second byte in the response contain the number of bytes. */
|
||||
*pucFrameCur++ = ( UCHAR ) ( usRegCount * 2 );
|
||||
*usLen += 1;
|
||||
|
||||
/* Make callback to fill the buffer. */
|
||||
eRegStatus = eMBRegHoldingCB( pucFrameCur, usRegAddress, usRegCount, MB_REG_READ );
|
||||
/* If an error occured convert it into a Modbus exception. */
|
||||
if( eRegStatus != MB_ENOERR )
|
||||
{
|
||||
eStatus = prveMBError2Exception( eRegStatus );
|
||||
}
|
||||
else
|
||||
{
|
||||
*usLen += usRegCount * 2;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Can't be a valid request because the length is incorrect. */
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
#if MB_FUNC_READWRITE_HOLDING_ENABLED > 0
|
||||
|
||||
eMBException
|
||||
eMBFuncReadWriteMultipleHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegReadAddress;
|
||||
USHORT usRegReadCount;
|
||||
USHORT usRegWriteAddress;
|
||||
USHORT usRegWriteCount;
|
||||
UCHAR ucRegWriteByteCount;
|
||||
UCHAR *pucFrameCur;
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen >= ( MB_PDU_FUNC_READWRITE_SIZE_MIN + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegReadAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_ADDR_OFF] << 8U );
|
||||
usRegReadAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_ADDR_OFF + 1] );
|
||||
usRegReadAddress++;
|
||||
|
||||
usRegReadCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF] << 8U );
|
||||
usRegReadCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_READ_REGCNT_OFF + 1] );
|
||||
|
||||
usRegWriteAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF] << 8U );
|
||||
usRegWriteAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_ADDR_OFF + 1] );
|
||||
usRegWriteAddress++;
|
||||
|
||||
usRegWriteCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_REGCNT_OFF] << 8U );
|
||||
usRegWriteCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_READWRITE_WRITE_REGCNT_OFF + 1] );
|
||||
|
||||
ucRegWriteByteCount = pucFrame[MB_PDU_FUNC_READWRITE_BYTECNT_OFF];
|
||||
|
||||
if( ( usRegReadCount >= 1 ) && ( usRegReadCount <= 0x7D ) &&
|
||||
( usRegWriteCount >= 1 ) && ( usRegWriteCount <= 0x79 ) &&
|
||||
( ( 2 * usRegWriteCount ) == ucRegWriteByteCount ) )
|
||||
{
|
||||
/* Make callback to update the register values. */
|
||||
eRegStatus = eMBRegHoldingCB( &pucFrame[MB_PDU_FUNC_READWRITE_WRITE_VALUES_OFF],
|
||||
usRegWriteAddress, usRegWriteCount, MB_REG_WRITE );
|
||||
|
||||
if( eRegStatus == MB_ENOERR )
|
||||
{
|
||||
/* Set the current PDU data pointer to the beginning. */
|
||||
pucFrameCur = &pucFrame[MB_PDU_FUNC_OFF];
|
||||
*usLen = MB_PDU_FUNC_OFF;
|
||||
|
||||
/* First byte contains the function code. */
|
||||
*pucFrameCur++ = MB_FUNC_READWRITE_MULTIPLE_REGISTERS;
|
||||
*usLen += 1;
|
||||
|
||||
/* Second byte in the response contain the number of bytes. */
|
||||
*pucFrameCur++ = ( UCHAR ) ( usRegReadCount * 2 );
|
||||
*usLen += 1;
|
||||
|
||||
/* Make the read callback. */
|
||||
eRegStatus =
|
||||
eMBRegHoldingCB( pucFrameCur, usRegReadAddress, usRegReadCount, MB_REG_READ );
|
||||
if( eRegStatus == MB_ENOERR )
|
||||
{
|
||||
*usLen += 2 * usRegReadCount;
|
||||
}
|
||||
}
|
||||
if( eRegStatus != MB_ENOERR )
|
||||
{
|
||||
eStatus = prveMBError2Exception( eRegStatus );
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,121 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbframe.h"
|
||||
#include "mbproto.h"
|
||||
#include "mbconfig.h"
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define MB_PDU_FUNC_READ_ADDR_OFF ( MB_PDU_DATA_OFF )
|
||||
#define MB_PDU_FUNC_READ_REGCNT_OFF ( MB_PDU_DATA_OFF + 2 )
|
||||
#define MB_PDU_FUNC_READ_SIZE ( 4 )
|
||||
#define MB_PDU_FUNC_READ_REGCNT_MAX ( 0x007D )
|
||||
|
||||
#define MB_PDU_FUNC_READ_RSP_BYTECNT_OFF ( MB_PDU_DATA_OFF )
|
||||
|
||||
/* ----------------------- Static functions ---------------------------------*/
|
||||
eMBException prveMBError2Exception( eMBErrorCode eErrorCode );
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
#if MB_FUNC_READ_INPUT_ENABLED > 0
|
||||
|
||||
eMBException
|
||||
eMBFuncReadInputRegister( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
USHORT usRegAddress;
|
||||
USHORT usRegCount;
|
||||
UCHAR *pucFrameCur;
|
||||
|
||||
eMBException eStatus = MB_EX_NONE;
|
||||
eMBErrorCode eRegStatus;
|
||||
|
||||
if( *usLen == ( MB_PDU_FUNC_READ_SIZE + MB_PDU_SIZE_MIN ) )
|
||||
{
|
||||
usRegAddress = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF] << 8 );
|
||||
usRegAddress |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_ADDR_OFF + 1] );
|
||||
usRegAddress++;
|
||||
|
||||
usRegCount = ( USHORT )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF] << 8 );
|
||||
usRegCount |= ( USHORT )( pucFrame[MB_PDU_FUNC_READ_REGCNT_OFF + 1] );
|
||||
|
||||
/* Check if the number of registers to read is valid. If not
|
||||
* return Modbus illegal data value exception.
|
||||
*/
|
||||
if( ( usRegCount >= 1 )
|
||||
&& ( usRegCount < MB_PDU_FUNC_READ_REGCNT_MAX ) )
|
||||
{
|
||||
/* Set the current PDU data pointer to the beginning. */
|
||||
pucFrameCur = &pucFrame[MB_PDU_FUNC_OFF];
|
||||
*usLen = MB_PDU_FUNC_OFF;
|
||||
|
||||
/* First byte contains the function code. */
|
||||
*pucFrameCur++ = MB_FUNC_READ_INPUT_REGISTER;
|
||||
*usLen += 1;
|
||||
|
||||
/* Second byte in the response contain the number of bytes. */
|
||||
*pucFrameCur++ = ( UCHAR )( usRegCount * 2 );
|
||||
*usLen += 1;
|
||||
|
||||
eRegStatus =
|
||||
eMBRegInputCB( pucFrameCur, usRegAddress, usRegCount );
|
||||
|
||||
/* If an error occured convert it into a Modbus exception. */
|
||||
if( eRegStatus != MB_ENOERR )
|
||||
{
|
||||
eStatus = prveMBError2Exception( eRegStatus );
|
||||
}
|
||||
else
|
||||
{
|
||||
*usLen += usRegCount * 2;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Can't be a valid read input register request because the length
|
||||
* is incorrect. */
|
||||
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,87 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbframe.h"
|
||||
#include "mbproto.h"
|
||||
#include "mbconfig.h"
|
||||
|
||||
#if MB_FUNC_OTHER_REP_SLAVEID_ENABLED > 0
|
||||
|
||||
/* ----------------------- Static variables ---------------------------------*/
|
||||
static UCHAR ucMBSlaveID[MB_FUNC_OTHER_REP_SLAVEID_BUF];
|
||||
static USHORT usMBSlaveIDLen;
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
|
||||
eMBErrorCode
|
||||
eMBSetSlaveID( UCHAR ucSlaveID, BOOL xIsRunning,
|
||||
UCHAR const *pucAdditional, USHORT usAdditionalLen )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
|
||||
/* the first byte and second byte in the buffer is reserved for
|
||||
* the parameter ucSlaveID and the running flag. The rest of
|
||||
* the buffer is available for additional data. */
|
||||
if( usAdditionalLen + 2 < MB_FUNC_OTHER_REP_SLAVEID_BUF )
|
||||
{
|
||||
usMBSlaveIDLen = 0;
|
||||
ucMBSlaveID[usMBSlaveIDLen++] = ucSlaveID;
|
||||
ucMBSlaveID[usMBSlaveIDLen++] = ( UCHAR )( xIsRunning ? 0xFF : 0x00 );
|
||||
if( usAdditionalLen > 0 )
|
||||
{
|
||||
memcpy( &ucMBSlaveID[usMBSlaveIDLen], pucAdditional,
|
||||
( size_t )usAdditionalLen );
|
||||
usMBSlaveIDLen += usAdditionalLen;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_ENORES;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
eMBException
|
||||
eMBFuncReportSlaveID( UCHAR * pucFrame, USHORT * usLen )
|
||||
{
|
||||
memcpy( &pucFrame[MB_PDU_DATA_OFF], &ucMBSlaveID[0], ( size_t )usMBSlaveIDLen );
|
||||
*usLen = ( USHORT )( MB_PDU_DATA_OFF + usMBSlaveIDLen );
|
||||
return MB_EX_NONE;
|
||||
}
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,128 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _MB_PORT_H
|
||||
#define _MB_PORT_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_BEGIN_EXTERN_C
|
||||
#endif
|
||||
|
||||
/* ----------------------- Type definitions ---------------------------------*/
|
||||
|
||||
typedef enum
|
||||
{
|
||||
EV_READY, /*!< Startup finished. */
|
||||
EV_FRAME_RECEIVED, /*!< Frame received. */
|
||||
EV_EXECUTE, /*!< Execute function. */
|
||||
EV_FRAME_SENT /*!< Frame sent. */
|
||||
} eMBEventType;
|
||||
|
||||
/*! \ingroup modbus
|
||||
* \brief Parity used for characters in serial mode.
|
||||
*
|
||||
* The parity which should be applied to the characters sent over the serial
|
||||
* link. Please note that this values are actually passed to the porting
|
||||
* layer and therefore not all parity modes might be available.
|
||||
*/
|
||||
typedef enum
|
||||
{
|
||||
MB_PAR_NONE, /*!< No parity. */
|
||||
MB_PAR_ODD, /*!< Odd parity. */
|
||||
MB_PAR_EVEN /*!< Even parity. */
|
||||
} eMBParity;
|
||||
|
||||
/* ----------------------- Supporting functions -----------------------------*/
|
||||
BOOL xMBPortEventInit( void );
|
||||
|
||||
BOOL xMBPortEventPost( eMBEventType eEvent );
|
||||
|
||||
BOOL xMBPortEventGet( /*@out@ */ eMBEventType * eEvent );
|
||||
|
||||
/* ----------------------- Serial port functions ----------------------------*/
|
||||
|
||||
BOOL xMBPortSerialInit( UCHAR ucPort, ULONG ulBaudRate,
|
||||
UCHAR ucDataBits, eMBParity eParity );
|
||||
|
||||
void vMBPortClose( void );
|
||||
|
||||
void xMBPortSerialClose( void );
|
||||
|
||||
void vMBPortSerialEnable( BOOL xRxEnable, BOOL xTxEnable );
|
||||
|
||||
BOOL xMBPortSerialGetByte( CHAR * pucByte );
|
||||
|
||||
BOOL xMBPortSerialPutByte( CHAR ucByte );
|
||||
|
||||
/* ----------------------- Timers functions ---------------------------------*/
|
||||
BOOL xMBPortTimersInit( USHORT usTimeOut50us );
|
||||
|
||||
void xMBPortTimersClose( void );
|
||||
|
||||
void vMBPortTimersEnable( void );
|
||||
|
||||
void vMBPortTimersDisable( void );
|
||||
|
||||
void vMBPortTimersDelay( USHORT usTimeOutMS );
|
||||
|
||||
/* ----------------------- Callback for the protocol stack ------------------*/
|
||||
|
||||
/*!
|
||||
* \brief Callback function for the porting layer when a new byte is
|
||||
* available.
|
||||
*
|
||||
* Depending upon the mode this callback function is used by the RTU or
|
||||
* ASCII transmission layers. In any case a call to xMBPortSerialGetByte()
|
||||
* must immediately return a new character.
|
||||
*
|
||||
* \return <code>TRUE</code> if a event was posted to the queue because
|
||||
* a new byte was received. The port implementation should wake up the
|
||||
* tasks which are currently blocked on the eventqueue.
|
||||
*/
|
||||
extern BOOL( *pxMBFrameCBByteReceived ) ( void );
|
||||
|
||||
extern BOOL( *pxMBFrameCBTransmitterEmpty ) ( void );
|
||||
|
||||
extern BOOL( *pxMBPortCBTimerExpired ) ( void );
|
||||
|
||||
/* ----------------------- TCP port functions -------------------------------*/
|
||||
BOOL xMBTCPPortInit( USHORT usTCPPort );
|
||||
|
||||
void vMBTCPPortClose( void );
|
||||
|
||||
void vMBTCPPortDisable( void );
|
||||
|
||||
BOOL xMBTCPPortGetRequest( UCHAR **ppucMBTCPFrame, USHORT * usTCPLength );
|
||||
|
||||
BOOL xMBTCPPortSendResponse( const UCHAR *pucMBTCPFrame, USHORT usTCPLength );
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_END_EXTERN_C
|
||||
#endif
|
||||
#endif
|
||||
@@ -0,0 +1,82 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _MB_PROTO_H
|
||||
#define _MB_PROTO_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_BEGIN_EXTERN_C
|
||||
#endif
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define MB_ADDRESS_BROADCAST ( 0 ) /*! Modbus broadcast address. */
|
||||
#define MB_ADDRESS_MIN ( 1 ) /*! Smallest possible slave address. */
|
||||
#define MB_ADDRESS_MAX ( 247 ) /*! Biggest possible slave address. */
|
||||
#define MB_FUNC_NONE ( 0 )
|
||||
#define MB_FUNC_READ_COILS ( 1 )
|
||||
#define MB_FUNC_READ_DISCRETE_INPUTS ( 2 )
|
||||
#define MB_FUNC_WRITE_SINGLE_COIL ( 5 )
|
||||
#define MB_FUNC_WRITE_MULTIPLE_COILS ( 15 )
|
||||
#define MB_FUNC_READ_HOLDING_REGISTER ( 3 )
|
||||
#define MB_FUNC_READ_INPUT_REGISTER ( 4 )
|
||||
#define MB_FUNC_WRITE_REGISTER ( 6 )
|
||||
#define MB_FUNC_WRITE_MULTIPLE_REGISTERS ( 16 )
|
||||
#define MB_FUNC_READWRITE_MULTIPLE_REGISTERS ( 23 )
|
||||
#define MB_FUNC_DIAG_READ_EXCEPTION ( 7 )
|
||||
#define MB_FUNC_DIAG_DIAGNOSTIC ( 8 )
|
||||
#define MB_FUNC_DIAG_GET_COM_EVENT_CNT ( 11 )
|
||||
#define MB_FUNC_DIAG_GET_COM_EVENT_LOG ( 12 )
|
||||
#define MB_FUNC_OTHER_REPORT_SLAVEID ( 17 )
|
||||
#define MB_FUNC_ERROR ( 128 )
|
||||
/* ----------------------- Type definitions ---------------------------------*/
|
||||
typedef enum
|
||||
{
|
||||
MB_EX_NONE = 0x00,
|
||||
MB_EX_ILLEGAL_FUNCTION = 0x01,
|
||||
MB_EX_ILLEGAL_DATA_ADDRESS = 0x02,
|
||||
MB_EX_ILLEGAL_DATA_VALUE = 0x03,
|
||||
MB_EX_SLAVE_DEVICE_FAILURE = 0x04,
|
||||
MB_EX_ACKNOWLEDGE = 0x05,
|
||||
MB_EX_SLAVE_BUSY = 0x06,
|
||||
MB_EX_MEMORY_PARITY_ERROR = 0x08,
|
||||
MB_EX_GATEWAY_PATH_FAILED = 0x0A,
|
||||
MB_EX_GATEWAY_TGT_FAILED = 0x0B
|
||||
} eMBException;
|
||||
|
||||
typedef eMBException( *pxMBFunctionHandler ) ( UCHAR * pucFrame, USHORT * pusLength );
|
||||
|
||||
typedef struct
|
||||
{
|
||||
UCHAR ucFunctionCode;
|
||||
pxMBFunctionHandler pxHandler;
|
||||
} xMBFunctionHandler;
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_END_EXTERN_C
|
||||
#endif
|
||||
#endif
|
||||
@@ -0,0 +1,157 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbconfig.h"
|
||||
#include "mbtcp.h"
|
||||
#include "mbframe.h"
|
||||
#include "mbport.h"
|
||||
|
||||
#if MB_TCP_ENABLED > 0
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
|
||||
/* ----------------------- MBAP Header --------------------------------------*/
|
||||
/*
|
||||
*
|
||||
* <------------------------ MODBUS TCP/IP ADU(1) ------------------------->
|
||||
* <----------- MODBUS PDU (1') ---------------->
|
||||
* +-----------+---------------+------------------------------------------+
|
||||
* | TID | PID | Length | UID |Code | Data |
|
||||
* +-----------+---------------+------------------------------------------+
|
||||
* | | | | |
|
||||
* (2) (3) (4) (5) (6)
|
||||
*
|
||||
* (2) ... MB_TCP_TID = 0 (Transaction Identifier - 2 Byte)
|
||||
* (3) ... MB_TCP_PID = 2 (Protocol Identifier - 2 Byte)
|
||||
* (4) ... MB_TCP_LEN = 4 (Number of bytes - 2 Byte)
|
||||
* (5) ... MB_TCP_UID = 6 (Unit Identifier - 1 Byte)
|
||||
* (6) ... MB_TCP_FUNC = 7 (Modbus Function Code)
|
||||
*
|
||||
* (1) ... Modbus TCP/IP Application Data Unit
|
||||
* (1') ... Modbus Protocol Data Unit
|
||||
*/
|
||||
|
||||
#define MB_TCP_TID 0
|
||||
#define MB_TCP_PID 2
|
||||
#define MB_TCP_LEN 4
|
||||
#define MB_TCP_UID 6
|
||||
#define MB_TCP_FUNC 7
|
||||
|
||||
#define MB_TCP_PROTOCOL_ID 0 /* 0 = Modbus Protocol */
|
||||
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
eMBErrorCode
|
||||
eMBTCPDoInit( USHORT ucTCPPort )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
|
||||
if( xMBTCPPortInit( ucTCPPort ) == FALSE )
|
||||
{
|
||||
eStatus = MB_EPORTERR;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
void
|
||||
eMBTCPStart( void )
|
||||
{
|
||||
}
|
||||
|
||||
void
|
||||
eMBTCPStop( void )
|
||||
{
|
||||
/* Make sure that no more clients are connected. */
|
||||
vMBTCPPortDisable( );
|
||||
}
|
||||
|
||||
eMBErrorCode
|
||||
eMBTCPReceive( UCHAR * pucRcvAddress, UCHAR ** ppucFrame, USHORT * pusLength )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_EIO;
|
||||
UCHAR *pucMBTCPFrame;
|
||||
USHORT usLength;
|
||||
USHORT usPID;
|
||||
|
||||
if( xMBTCPPortGetRequest( &pucMBTCPFrame, &usLength ) != FALSE )
|
||||
{
|
||||
usPID = pucMBTCPFrame[MB_TCP_PID] << 8U;
|
||||
usPID |= pucMBTCPFrame[MB_TCP_PID + 1];
|
||||
|
||||
if( usPID == MB_TCP_PROTOCOL_ID )
|
||||
{
|
||||
*ppucFrame = &pucMBTCPFrame[MB_TCP_FUNC];
|
||||
*pusLength = usLength - MB_TCP_FUNC;
|
||||
eStatus = MB_ENOERR;
|
||||
|
||||
/* Modbus TCP does not use any addresses. Fake the source address such
|
||||
* that the processing part deals with this frame.
|
||||
*/
|
||||
*pucRcvAddress = MB_TCP_PSEUDO_ADDRESS;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_EIO;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
eMBErrorCode
|
||||
eMBTCPSend( UCHAR _unused, const UCHAR * pucFrame, USHORT usLength )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
UCHAR *pucMBTCPFrame = ( UCHAR * ) pucFrame - MB_TCP_FUNC;
|
||||
USHORT usTCPLength = usLength + MB_TCP_FUNC;
|
||||
|
||||
/* The MBAP header is already initialized because the caller calls this
|
||||
* function with the buffer returned by the previous call. Therefore we
|
||||
* only have to update the length in the header. Note that the length
|
||||
* header includes the size of the Modbus PDU and the UID Byte. Therefore
|
||||
* the length is usLength plus one.
|
||||
*/
|
||||
pucMBTCPFrame[MB_TCP_LEN] = ( usLength + 1 ) >> 8U;
|
||||
pucMBTCPFrame[MB_TCP_LEN + 1] = ( usLength + 1 ) & 0xFF;
|
||||
if( xMBTCPPortSendResponse( pucMBTCPFrame, usTCPLength ) == FALSE )
|
||||
{
|
||||
eStatus = MB_EIO;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,52 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _MB_TCP_H
|
||||
#define _MB_TCP_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_BEGIN_EXTERN_C
|
||||
#endif
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define MB_TCP_PSEUDO_ADDRESS 255
|
||||
|
||||
/* ----------------------- Function prototypes ------------------------------*/
|
||||
eMBErrorCode eMBTCPDoInit( USHORT ucTCPPort );
|
||||
void eMBTCPStart( void );
|
||||
void eMBTCPStop( void );
|
||||
eMBErrorCode eMBTCPReceive( UCHAR * pucRcvAddress, UCHAR ** pucFrame,
|
||||
USHORT * pusLength );
|
||||
eMBErrorCode eMBTCPSend( UCHAR _unused, const UCHAR * pucFrame,
|
||||
USHORT usLength );
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_END_EXTERN_C
|
||||
#endif
|
||||
#endif
|
||||
@@ -0,0 +1,140 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
/* ----------------------- System includes ----------------------------------*/
|
||||
#include "stdlib.h"
|
||||
#include "string.h"
|
||||
|
||||
/* ----------------------- Platform includes --------------------------------*/
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbproto.h"
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define BITS_UCHAR 8U
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
void
|
||||
xMBUtilSetBits( UCHAR * ucByteBuf, USHORT usBitOffset, UCHAR ucNBits,
|
||||
UCHAR ucValue )
|
||||
{
|
||||
USHORT usWordBuf;
|
||||
USHORT usMask;
|
||||
USHORT usByteOffset;
|
||||
USHORT usNPreBits;
|
||||
USHORT usValue = ucValue;
|
||||
|
||||
assert( ucNBits <= 8 );
|
||||
assert( ( size_t )BITS_UCHAR == sizeof( UCHAR ) * 8 );
|
||||
|
||||
/* Calculate byte offset for first byte containing the bit values starting
|
||||
* at usBitOffset. */
|
||||
usByteOffset = ( USHORT )( ( usBitOffset ) / BITS_UCHAR );
|
||||
|
||||
/* How many bits precede our bits to set. */
|
||||
usNPreBits = ( USHORT )( usBitOffset - usByteOffset * BITS_UCHAR );
|
||||
|
||||
/* Move bit field into position over bits to set */
|
||||
usValue <<= usNPreBits;
|
||||
|
||||
/* Prepare a mask for setting the new bits. */
|
||||
usMask = ( USHORT )( ( 1 << ( USHORT ) ucNBits ) - 1 );
|
||||
usMask <<= usBitOffset - usByteOffset * BITS_UCHAR;
|
||||
|
||||
/* copy bits into temporary storage. */
|
||||
usWordBuf = ucByteBuf[usByteOffset];
|
||||
usWordBuf |= ucByteBuf[usByteOffset + 1] << BITS_UCHAR;
|
||||
|
||||
/* Zero out bit field bits and then or value bits into them. */
|
||||
usWordBuf = ( USHORT )( ( usWordBuf & ( ~usMask ) ) | usValue );
|
||||
|
||||
/* move bits back into storage */
|
||||
ucByteBuf[usByteOffset] = ( UCHAR )( usWordBuf & 0xFF );
|
||||
ucByteBuf[usByteOffset + 1] = ( UCHAR )( usWordBuf >> BITS_UCHAR );
|
||||
}
|
||||
|
||||
UCHAR
|
||||
xMBUtilGetBits( UCHAR * ucByteBuf, USHORT usBitOffset, UCHAR ucNBits )
|
||||
{
|
||||
USHORT usWordBuf;
|
||||
USHORT usMask;
|
||||
USHORT usByteOffset;
|
||||
USHORT usNPreBits;
|
||||
|
||||
/* Calculate byte offset for first byte containing the bit values starting
|
||||
* at usBitOffset. */
|
||||
usByteOffset = ( USHORT )( ( usBitOffset ) / BITS_UCHAR );
|
||||
|
||||
/* How many bits precede our bits to set. */
|
||||
usNPreBits = ( USHORT )( usBitOffset - usByteOffset * BITS_UCHAR );
|
||||
|
||||
/* Prepare a mask for setting the new bits. */
|
||||
usMask = ( USHORT )( ( 1 << ( USHORT ) ucNBits ) - 1 );
|
||||
|
||||
/* copy bits into temporary storage. */
|
||||
usWordBuf = ucByteBuf[usByteOffset];
|
||||
usWordBuf |= ucByteBuf[usByteOffset + 1] << BITS_UCHAR;
|
||||
|
||||
/* throw away unneeded bits. */
|
||||
usWordBuf >>= usNPreBits;
|
||||
|
||||
/* mask away bits above the requested bitfield. */
|
||||
usWordBuf &= usMask;
|
||||
|
||||
return ( UCHAR ) usWordBuf;
|
||||
}
|
||||
|
||||
eMBException
|
||||
prveMBError2Exception( eMBErrorCode eErrorCode )
|
||||
{
|
||||
eMBException eStatus;
|
||||
|
||||
switch ( eErrorCode )
|
||||
{
|
||||
case MB_ENOERR:
|
||||
eStatus = MB_EX_NONE;
|
||||
break;
|
||||
|
||||
case MB_ENOREG:
|
||||
eStatus = MB_EX_ILLEGAL_DATA_ADDRESS;
|
||||
break;
|
||||
|
||||
case MB_ETIMEDOUT:
|
||||
eStatus = MB_EX_SLAVE_BUSY;
|
||||
break;
|
||||
|
||||
default:
|
||||
eStatus = MB_EX_SLAVE_DEVICE_FAILURE;
|
||||
break;
|
||||
}
|
||||
|
||||
return eStatus;
|
||||
}
|
||||
@@ -0,0 +1,107 @@
|
||||
/*
|
||||
* FreeModbus Libary: A portable Modbus implementation for Modbus ASCII/RTU.
|
||||
* Copyright (c) 2006-2018 Christian Walter <cwalter@embedded-solutions.at>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _MB_UTILS_H
|
||||
#define _MB_UTILS_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_BEGIN_EXTERN_C
|
||||
#endif
|
||||
/*! \defgroup modbus_utils Utilities
|
||||
*
|
||||
* This module contains some utility functions which can be used by
|
||||
* the application. It includes some special functions for working with
|
||||
* bitfields backed by a character array buffer.
|
||||
*
|
||||
*/
|
||||
/*! \addtogroup modbus_utils
|
||||
* @{
|
||||
*/
|
||||
/*! \brief Function to set bits in a byte buffer.
|
||||
*
|
||||
* This function allows the efficient use of an array to implement bitfields.
|
||||
* The array used for storing the bits must always be a multiple of two
|
||||
* bytes. Up to eight bits can be set or cleared in one operation.
|
||||
*
|
||||
* \param ucByteBuf A buffer where the bit values are stored. Must be a
|
||||
* multiple of 2 bytes. No length checking is performed and if
|
||||
* usBitOffset / 8 is greater than the size of the buffer memory contents
|
||||
* is overwritten.
|
||||
* \param usBitOffset The starting address of the bits to set. The first
|
||||
* bit has the offset 0.
|
||||
* \param ucNBits Number of bits to modify. The value must always be smaller
|
||||
* than 8.
|
||||
* \param ucValues Thew new values for the bits. The value for the first bit
|
||||
* starting at <code>usBitOffset</code> is the LSB of the value
|
||||
* <code>ucValues</code>
|
||||
*
|
||||
* \code
|
||||
* ucBits[2] = {0, 0};
|
||||
*
|
||||
* // Set bit 4 to 1 (read: set 1 bit starting at bit offset 4 to value 1)
|
||||
* xMBUtilSetBits( ucBits, 4, 1, 1 );
|
||||
*
|
||||
* // Set bit 7 to 1 and bit 8 to 0.
|
||||
* xMBUtilSetBits( ucBits, 7, 2, 0x01 );
|
||||
*
|
||||
* // Set bits 8 - 11 to 0x05 and bits 12 - 15 to 0x0A;
|
||||
* xMBUtilSetBits( ucBits, 8, 8, 0x5A);
|
||||
* \endcode
|
||||
*/
|
||||
void xMBUtilSetBits( UCHAR * ucByteBuf, USHORT usBitOffset,
|
||||
UCHAR ucNBits, UCHAR ucValues );
|
||||
|
||||
/*! \brief Function to read bits in a byte buffer.
|
||||
*
|
||||
* This function is used to extract up bit values from an array. Up to eight
|
||||
* bit values can be extracted in one step.
|
||||
*
|
||||
* \param ucByteBuf A buffer where the bit values are stored.
|
||||
* \param usBitOffset The starting address of the bits to set. The first
|
||||
* bit has the offset 0.
|
||||
* \param ucNBits Number of bits to modify. The value must always be smaller
|
||||
* than 8.
|
||||
*
|
||||
* \code
|
||||
* UCHAR ucBits[2] = {0, 0};
|
||||
* UCHAR ucResult;
|
||||
*
|
||||
* // Extract the bits 3 - 10.
|
||||
* ucResult = xMBUtilGetBits( ucBits, 3, 8 );
|
||||
* \endcode
|
||||
*/
|
||||
UCHAR xMBUtilGetBits( UCHAR * ucByteBuf, USHORT usBitOffset,
|
||||
UCHAR ucNBits );
|
||||
|
||||
/*! @} */
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_END_EXTERN_C
|
||||
#endif
|
||||
#endif
|
||||
@@ -0,0 +1,83 @@
|
||||
/*
|
||||
* FreeModbus Libary: BSD Socket Library Port
|
||||
* Copyright (C) 2006 Christian Walter <wolti@sil.at>
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*
|
||||
* File: $Id$
|
||||
*/
|
||||
|
||||
/**********************************************************
|
||||
* Linux TCP support.
|
||||
* Based on Walter's project.
|
||||
* Modified by Steven Guo <gotop167@163.com>
|
||||
***********************************************************/
|
||||
|
||||
#ifndef _PORT_H
|
||||
#define _PORT_H
|
||||
|
||||
|
||||
#include <assert.h>
|
||||
|
||||
#define INLINE
|
||||
#define PR_BEGIN_EXTERN_C extern "C" {
|
||||
#define PR_END_EXTERN_C }
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_BEGIN_EXTERN_C
|
||||
#endif
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define ENTER_CRITICAL_SECTION( )
|
||||
#define EXIT_CRITICAL_SECTION( )
|
||||
#define MB_PORT_HAS_CLOSE 1
|
||||
#ifndef TRUE
|
||||
#define TRUE 1
|
||||
#endif
|
||||
#ifndef FALSE
|
||||
#define FALSE 0
|
||||
#endif
|
||||
/* ----------------------- Type definitions ---------------------------------*/
|
||||
typedef int SOCKET;
|
||||
|
||||
#define SOCKET_ERROR (-1)
|
||||
#define INVALID_SOCKET (~0)
|
||||
|
||||
|
||||
typedef char BOOL;
|
||||
typedef unsigned char UCHAR;
|
||||
typedef unsigned char BYTE;
|
||||
typedef char CHAR;
|
||||
typedef unsigned short USHORT;
|
||||
typedef short SHORT;
|
||||
|
||||
typedef unsigned long ULONG;
|
||||
typedef long LONG;
|
||||
typedef enum
|
||||
{
|
||||
MB_LOG_DEBUG,
|
||||
MB_LOG_INFO,
|
||||
MB_LOG_WARN,
|
||||
MB_LOG_ERROR
|
||||
} eMBPortLogLevel;
|
||||
|
||||
/* ----------------------- Function prototypes ------------------------------*/
|
||||
|
||||
void TcpvMBPortLog( eMBPortLogLevel eLevel, const CHAR * szModule, const CHAR * szFmt,
|
||||
... );
|
||||
|
||||
#ifdef __cplusplus
|
||||
PR_END_EXTERN_C
|
||||
#endif
|
||||
#endif
|
||||
@@ -0,0 +1,72 @@
|
||||
/*
|
||||
* FreeModbus Libary: Win32 Port
|
||||
* Copyright (C) 2006 Christian Walter <wolti@sil.at>
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*
|
||||
* File: $Id$
|
||||
*/
|
||||
|
||||
/**********************************************************
|
||||
* Linux TCP support.
|
||||
* Based on Walter's project.
|
||||
* Modified by Steven Guo <gotop167@163.com>
|
||||
***********************************************************/
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbport.h"
|
||||
|
||||
/* ----------------------- Variables ----------------------------------------*/
|
||||
static eMBEventType eQueuedEvent;
|
||||
static BOOL xEventInQueue;
|
||||
|
||||
/* ----------------------- Function prototypes ------------------------------*/
|
||||
BOOL xMBPortTCPPool( void );
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
BOOL
|
||||
xMBPortEventInit( void )
|
||||
{
|
||||
xEventInQueue = FALSE;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
BOOL
|
||||
xMBPortEventPost( eMBEventType eEvent )
|
||||
{
|
||||
xEventInQueue = TRUE;
|
||||
eQueuedEvent = eEvent;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
BOOL
|
||||
xMBPortEventGet( eMBEventType * eEvent )
|
||||
{
|
||||
BOOL xEventHappened = FALSE;
|
||||
|
||||
if( xEventInQueue )
|
||||
{
|
||||
*eEvent = eQueuedEvent;
|
||||
xEventInQueue = FALSE;
|
||||
xEventHappened = TRUE;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* We can't do anything with errors from the pooling module. */
|
||||
( void )xMBPortTCPPool( );
|
||||
}
|
||||
return xEventHappened;
|
||||
}
|
||||
@@ -0,0 +1,69 @@
|
||||
/*
|
||||
* FreeModbus Libary: Win32 Port
|
||||
* Copyright (C) 2006 Christian Walter <wolti@sil.at>
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*
|
||||
* File: $Id$
|
||||
*/
|
||||
|
||||
/**********************************************************
|
||||
* Linux TCP support.
|
||||
* Based on Walter's project.
|
||||
* Modified by Steven Guo <gotop167@163.com>
|
||||
***********************************************************/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdarg.h>
|
||||
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbport.h"
|
||||
#include "mbconfig.h"
|
||||
|
||||
|
||||
BOOL
|
||||
prvMBTCPPortAddressToString( SOCKET xSocket, CHAR * szAddr, USHORT usBufSize )
|
||||
{
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
CHAR *
|
||||
prvMBTCPPortFrameToString( UCHAR * pucFrame, USHORT usFrameLen )
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
CHAR *
|
||||
WsaError2String( int iError )
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
void
|
||||
vMBPortLog( eMBPortLogLevel eLevel, const CHAR * szModule, const CHAR * szFmt, ... )
|
||||
{
|
||||
va_list args;
|
||||
static const CHAR *arszLevel2Str[] = { "DEBUG", "INFO", "WARN", "ERROR" };
|
||||
|
||||
fprintf( stderr, "%s: %s: ", arszLevel2Str[eLevel], szModule );
|
||||
|
||||
va_start( args, szFmt );
|
||||
fprintf( stderr, szFmt, args );
|
||||
va_end( args );
|
||||
}
|
||||
@@ -0,0 +1,367 @@
|
||||
/*
|
||||
* FreeModbus Libary: Win32 Port
|
||||
* Copyright (C) 2006 Christian Walter <wolti@sil.at>
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*
|
||||
* File: $Id$
|
||||
*/
|
||||
|
||||
/*
|
||||
* Design Notes:
|
||||
*
|
||||
* The xMBPortTCPInit function allocates a socket and binds the socket to
|
||||
* all available interfaces ( bind with INADDR_ANY ). In addition it
|
||||
* creates an array of event objects which is used to check the state of
|
||||
* the clients. On event object is used to handle new connections or
|
||||
* closed ones. The other objects are used on a per client basis for
|
||||
* processing.
|
||||
*/
|
||||
|
||||
/**********************************************************
|
||||
* Linux TCP support.
|
||||
* Based on Walter's project.
|
||||
* Modified by Steven Guo <gotop167@163.com>
|
||||
***********************************************************/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <sys/types.h>
|
||||
#include <sockets.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
#include <errno.h>
|
||||
#include <time.h>
|
||||
#include "port.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbport.h"
|
||||
|
||||
|
||||
|
||||
/* ----------------------- MBAP Header --------------------------------------*/
|
||||
#define MB_TCP_UID 6
|
||||
#define MB_TCP_LEN 4
|
||||
#define MB_TCP_FUNC 7
|
||||
|
||||
/* ----------------------- Defines -----------------------------------------*/
|
||||
#define MB_TCP_DEFAULT_PORT 502 /* TCP listening port. */
|
||||
#define MB_TCP_POOL_TIMEOUT 50 /* pool timeout for event waiting. */
|
||||
#define MB_TCP_READ_TIMEOUT 1000 /* Maximum timeout to wait for packets. */
|
||||
#define MB_TCP_READ_CYCLE 100 /* Time between checking for new data. */
|
||||
|
||||
#define MB_TCP_DEBUG 1 /* Set to 1 for additional debug output. */
|
||||
|
||||
#define MB_TCP_BUF_SIZE ( 256 + 7 ) /* Must hold a complete Modbus TCP frame. */
|
||||
|
||||
#define EV_CONNECTION 0
|
||||
#define EV_CLIENT 1
|
||||
#define EV_NEVENTS EV_CLIENT + 1
|
||||
|
||||
/* ----------------------- Static variables ---------------------------------*/
|
||||
SOCKET xListenSocket;
|
||||
SOCKET xClientSocket = INVALID_SOCKET;
|
||||
static fd_set allset;
|
||||
|
||||
static UCHAR aucTCPBuf[MB_TCP_BUF_SIZE];
|
||||
static USHORT usTCPBufPos;
|
||||
static USHORT usTCPFrameBytesLeft;
|
||||
|
||||
/* ----------------------- External functions -------------------------------*/
|
||||
CHAR *WsaError2String( int dwError );
|
||||
|
||||
/* ----------------------- Static functions ---------------------------------*/
|
||||
BOOL prvMBTCPPortAddressToString( SOCKET xSocket, CHAR * szAddr, USHORT usBufSize );
|
||||
CHAR *prvMBTCPPortFrameToString( UCHAR * pucFrame, USHORT usFrameLen );
|
||||
static BOOL prvbMBPortAcceptClient( void );
|
||||
static void prvvMBPortReleaseClient( void );
|
||||
|
||||
|
||||
/* ----------------------- Begin implementation -----------------------------*/
|
||||
|
||||
BOOL
|
||||
xMBTCPPortInit( USHORT usTCPPort )
|
||||
{
|
||||
USHORT usPort;
|
||||
struct sockaddr_in serveraddr;
|
||||
|
||||
if( usTCPPort == 0 )
|
||||
{
|
||||
usPort = MB_TCP_DEFAULT_PORT;
|
||||
}
|
||||
else
|
||||
{
|
||||
usPort = ( USHORT ) usTCPPort;
|
||||
}
|
||||
memset( &serveraddr, 0, sizeof( serveraddr ) );
|
||||
serveraddr.sin_family = AF_INET;
|
||||
serveraddr.sin_addr.s_addr = htonl( INADDR_ANY );
|
||||
serveraddr.sin_port = htons( usPort );
|
||||
if( ( xListenSocket = socket( AF_INET, SOCK_STREAM, IPPROTO_TCP ) ) == -1 )
|
||||
{
|
||||
fprintf( stderr, "Create socket failed.\r\n" );
|
||||
return FALSE;
|
||||
}
|
||||
else if( bind( xListenSocket, ( struct sockaddr * )&serveraddr, sizeof( serveraddr ) ) == -1 )
|
||||
{
|
||||
perror("bind");
|
||||
fprintf( stderr, "Bind socket failed.\r\n" );
|
||||
return FALSE;
|
||||
}
|
||||
else if( listen( xListenSocket, 5 ) == -1 )
|
||||
{
|
||||
fprintf( stderr, "Listen socket failed.\r\n" );
|
||||
return FALSE;
|
||||
}
|
||||
FD_ZERO( &allset );
|
||||
FD_SET( xListenSocket, &allset );
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
void
|
||||
vMBTCPPortClose( )
|
||||
{
|
||||
// Close all client sockets.
|
||||
if( xClientSocket != SOCKET_ERROR )
|
||||
{
|
||||
prvvMBPortReleaseClient( );
|
||||
}
|
||||
// Close the listener socket.
|
||||
if( xListenSocket != SOCKET_ERROR )
|
||||
{
|
||||
close( xListenSocket );
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
vMBTCPPortDisable( void )
|
||||
{
|
||||
/* Close all client sockets. */
|
||||
if( xClientSocket != SOCKET_ERROR )
|
||||
{
|
||||
prvvMBPortReleaseClient( );
|
||||
}
|
||||
}
|
||||
|
||||
/*! \ingroup port_win32tcp
|
||||
*
|
||||
* \brief Pool the listening socket and currently connected Modbus TCP clients
|
||||
* for new events.
|
||||
* \internal
|
||||
*
|
||||
* This function checks if new clients want to connect or if already connected
|
||||
* clients are sending requests. If a new client is connected and there are
|
||||
* still client slots left (The current implementation supports only one)
|
||||
* then the connection is accepted and an event object for the new client
|
||||
* socket is activated (See prvbMBPortAcceptClient() ).
|
||||
* Events for already existing clients in \c FD_READ and \c FD_CLOSE. In case of
|
||||
* an \c FD_CLOSE the client connection is released (See prvvMBPortReleaseClient() ).
|
||||
* In case of an \c FD_READ command the existing data is read from the client
|
||||
* and if a complete frame has been received the Modbus Stack is notified.
|
||||
*
|
||||
* \return FALSE in case of an internal I/O error. For example if the internal
|
||||
* event objects are in an invalid state. Note that this does not include any
|
||||
* client errors. In all other cases returns TRUE.
|
||||
*/
|
||||
BOOL
|
||||
xMBPortTCPPool( void )
|
||||
{
|
||||
int n;
|
||||
fd_set fread;
|
||||
struct timeval tval;
|
||||
|
||||
tval.tv_sec = 0;
|
||||
tval.tv_usec = 5000;
|
||||
int ret;
|
||||
USHORT usLength;
|
||||
|
||||
if( xClientSocket == INVALID_SOCKET )
|
||||
{
|
||||
/* Accept to client */
|
||||
if( ( n = select( xListenSocket + 1, &allset, NULL, NULL, NULL ) ) < 0 )
|
||||
{
|
||||
if( errno == EINTR )
|
||||
{
|
||||
;
|
||||
}
|
||||
else
|
||||
{
|
||||
;
|
||||
}
|
||||
}
|
||||
if( FD_ISSET( xListenSocket, &allset ) )
|
||||
{
|
||||
( void )prvbMBPortAcceptClient( );
|
||||
}
|
||||
}
|
||||
while( TRUE )
|
||||
{
|
||||
FD_ZERO( &fread );
|
||||
FD_SET( xClientSocket, &fread );
|
||||
if( ( ( ret = select( xClientSocket + 1, &fread, NULL, NULL, &tval ) ) == SOCKET_ERROR )
|
||||
|| !ret )
|
||||
{
|
||||
continue;
|
||||
}
|
||||
if( ret > 0 )
|
||||
{
|
||||
if( FD_ISSET( xClientSocket, &fread ) )
|
||||
{
|
||||
if( ( ( ret =
|
||||
recv( xClientSocket, &aucTCPBuf[usTCPBufPos], usTCPFrameBytesLeft,
|
||||
0 ) ) == SOCKET_ERROR ) || ( !ret ) )
|
||||
{
|
||||
close( xClientSocket );
|
||||
xClientSocket = INVALID_SOCKET;
|
||||
return TRUE;
|
||||
}
|
||||
usTCPBufPos += ret;
|
||||
usTCPFrameBytesLeft -= ret;
|
||||
if( usTCPBufPos >= MB_TCP_FUNC )
|
||||
{
|
||||
/* Length is a byte count of Modbus PDU (function code + data) and the
|
||||
* unit identifier. */
|
||||
usLength = aucTCPBuf[MB_TCP_LEN] << 8U;
|
||||
usLength |= aucTCPBuf[MB_TCP_LEN + 1];
|
||||
|
||||
/* Is the frame already complete. */
|
||||
if( usTCPBufPos < ( MB_TCP_UID + usLength ) )
|
||||
{
|
||||
usTCPFrameBytesLeft = usLength + MB_TCP_UID - usTCPBufPos;
|
||||
}
|
||||
/* The frame is complete. */
|
||||
else if( usTCPBufPos == ( MB_TCP_UID + usLength ) )
|
||||
{
|
||||
( void )xMBPortEventPost( EV_FRAME_RECEIVED );
|
||||
return TRUE;
|
||||
}
|
||||
/* This can not happend because we always calculate the number of bytes
|
||||
* to receive. */
|
||||
else
|
||||
{
|
||||
assert( usTCPBufPos <= ( MB_TCP_UID + usLength ) );
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/*!
|
||||
* \ingroup port_win32tcp
|
||||
* \brief Receives parts of a Modbus TCP frame and if complete notifies
|
||||
* the protocol stack.
|
||||
* \internal
|
||||
*
|
||||
* This function reads a complete Modbus TCP frame from the protocol stack.
|
||||
* It starts by reading the header with an initial request size for
|
||||
* usTCPFrameBytesLeft = MB_TCP_FUNC. If the header is complete the
|
||||
* number of bytes left can be calculated from it (See Length in MBAP header).
|
||||
* Further read calls are issued until the frame is complete.
|
||||
*
|
||||
* \return \c TRUE if part of a Modbus TCP frame could be processed. In case
|
||||
* of a communication error the function returns \c FALSE.
|
||||
*/
|
||||
|
||||
BOOL
|
||||
xMBTCPPortGetRequest( UCHAR ** ppucMBTCPFrame, USHORT * usTCPLength )
|
||||
{
|
||||
*ppucMBTCPFrame = &aucTCPBuf[0];
|
||||
*usTCPLength = usTCPBufPos;
|
||||
|
||||
/* Reset the buffer. */
|
||||
usTCPBufPos = 0;
|
||||
usTCPFrameBytesLeft = MB_TCP_FUNC;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
BOOL
|
||||
xMBTCPPortSendResponse( const UCHAR * pucMBTCPFrame, USHORT usTCPLength )
|
||||
{
|
||||
BOOL bFrameSent = FALSE;
|
||||
BOOL bAbort = FALSE;
|
||||
int res;
|
||||
int iBytesSent = 0;
|
||||
int iTimeOut = MB_TCP_READ_TIMEOUT;
|
||||
|
||||
do
|
||||
{
|
||||
res = send( xClientSocket, &pucMBTCPFrame[iBytesSent], usTCPLength - iBytesSent, 0 );
|
||||
switch ( res )
|
||||
{
|
||||
case -1:
|
||||
if( iTimeOut > 0 )
|
||||
{
|
||||
iTimeOut -= MB_TCP_READ_CYCLE;
|
||||
// usleep( MB_TCP_READ_CYCLE );
|
||||
// PrivTaskDelay( MB_TCP_READ_CYCLE );
|
||||
}
|
||||
else
|
||||
{
|
||||
bAbort = TRUE;
|
||||
}
|
||||
break;
|
||||
case 0:
|
||||
prvvMBPortReleaseClient( );
|
||||
bAbort = TRUE;
|
||||
break;
|
||||
default:
|
||||
iBytesSent += res;
|
||||
break;
|
||||
}
|
||||
}
|
||||
while( ( iBytesSent != usTCPLength ) && !bAbort );
|
||||
|
||||
bFrameSent = iBytesSent == usTCPLength ? TRUE : FALSE;
|
||||
|
||||
return bFrameSent;
|
||||
}
|
||||
|
||||
void
|
||||
prvvMBPortReleaseClient( )
|
||||
{
|
||||
( void )recv( xClientSocket, &aucTCPBuf[0], MB_TCP_BUF_SIZE, 0 );
|
||||
|
||||
( void )close( xClientSocket );
|
||||
xClientSocket = INVALID_SOCKET;
|
||||
}
|
||||
|
||||
BOOL
|
||||
prvbMBPortAcceptClient( )
|
||||
{
|
||||
SOCKET xNewSocket;
|
||||
BOOL bOkay;
|
||||
|
||||
/* Check if we can handle a new connection. */
|
||||
|
||||
if( xClientSocket != INVALID_SOCKET )
|
||||
{
|
||||
fprintf( stderr, "can't accept new client. all connections in use.\n" );
|
||||
bOkay = FALSE;
|
||||
}
|
||||
else if( ( xNewSocket = accept( xListenSocket, NULL, NULL ) ) == INVALID_SOCKET )
|
||||
{
|
||||
bOkay = FALSE;
|
||||
}
|
||||
else
|
||||
{
|
||||
xClientSocket = xNewSocket;
|
||||
usTCPBufPos = 0;
|
||||
usTCPFrameBytesLeft = MB_TCP_FUNC;
|
||||
bOkay = TRUE;
|
||||
}
|
||||
return bOkay;
|
||||
}
|
||||
@@ -0,0 +1,299 @@
|
||||
/*
|
||||
* FreeModbus Libary: Win32 Demo Application
|
||||
* Copyright (C) 2006 Christian Walter <wolti@sil.at>
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*
|
||||
* File: $Id$
|
||||
*/
|
||||
|
||||
/**********************************************************
|
||||
* Linux TCP support.
|
||||
* Based on Walter's project.
|
||||
* Modified by Steven Guo <gotop167@163.com>
|
||||
***********************************************************/
|
||||
|
||||
/* ----------------------- Standard C Libs includes --------------------------*/
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
#include <unistd.h>
|
||||
#include <errno.h>
|
||||
#include <pthread.h>
|
||||
#include <signal.h>
|
||||
#include <transform.h>
|
||||
#include "lwip/sys.h"
|
||||
#include "lwip/sockets.h"
|
||||
|
||||
/* ----------------------- Modbus includes ----------------------------------*/
|
||||
#include "mb.h"
|
||||
#include "mbport.h"
|
||||
|
||||
/* ----------------------- Defines ------------------------------------------*/
|
||||
#define PROG "freemodbus"
|
||||
|
||||
#define REG_INPUT_START 1000
|
||||
#define REG_INPUT_NREGS 4
|
||||
#define REG_HOLDING_START 2000
|
||||
#define REG_HOLDING_NREGS 10
|
||||
|
||||
/* ----------------------- Static variables ---------------------------------*/
|
||||
static USHORT usRegInputStart = REG_INPUT_START;
|
||||
static USHORT usRegInputBuf[REG_INPUT_NREGS];
|
||||
static USHORT usRegHoldingStart = REG_HOLDING_START;
|
||||
static USHORT usRegHoldingBuf[REG_HOLDING_NREGS];
|
||||
static pthread_mutex_t xLock;
|
||||
static enum ThreadState
|
||||
{
|
||||
STOPPED,
|
||||
RUNNING,
|
||||
SHUTDOWN
|
||||
} ePollThreadState;
|
||||
|
||||
/* ----------------------- Static functions ---------------------------------*/
|
||||
static BOOL bCreatePollingThread( void );
|
||||
static enum ThreadState eGetPollingThreadState( void );
|
||||
static void eSetPollingThreadState( enum ThreadState eNewState );
|
||||
static void* pvPollingThread( void *pvParameter );
|
||||
int LWIPConnectSocket(uint16_t port);
|
||||
|
||||
/* ----------------------- Start implementation -----------------------------*/
|
||||
int MBServer()
|
||||
{
|
||||
int iExitCode;
|
||||
CHAR cCh;
|
||||
BOOL bDoExit;
|
||||
usRegHoldingBuf[5] = 123;
|
||||
usRegHoldingBuf[7] = 234;
|
||||
|
||||
printf("%s ip %d.%d.%d.%d mask %d.%d.%d.%d gw %d.%d.%d.%d\n", __func__,
|
||||
192, 168, 250, 233,
|
||||
255, 255, 255, 255,
|
||||
192, 168, 250, 1);
|
||||
uint8_t local_ip[4] = {192,168,250,233};
|
||||
uint8_t gateway[4] = {192,168,250,1};
|
||||
uint8_t netmask[4] = {255,255,255,0};
|
||||
lwip_config_tcp(0, local_ip, netmask, gateway);
|
||||
printf("%s LWIPInit done\n", __func__);
|
||||
|
||||
if( eMBTCPInit( MB_TCP_PORT_USE_DEFAULT ) != MB_ENOERR )
|
||||
{
|
||||
fprintf( stderr, "%s: can't initialize modbus stack!\r\n", PROG );
|
||||
iExitCode = EXIT_FAILURE;
|
||||
}
|
||||
else
|
||||
{
|
||||
eSetPollingThreadState( STOPPED );
|
||||
/* CLI interface. */
|
||||
if( bCreatePollingThread( ) != TRUE )
|
||||
{
|
||||
printf( "Can't start protocol stack! Already running?\r\n" );
|
||||
}
|
||||
}
|
||||
printf("%d %d %s\n",sizeof(usRegHoldingBuf),__LINE__,__func__);
|
||||
|
||||
while(1)
|
||||
{
|
||||
for(int i =0; i<sizeof(usRegHoldingBuf)/2;i++)
|
||||
{
|
||||
printf("poll recv is %3d\n", usRegHoldingBuf[i]);
|
||||
MdelayKTask(100);
|
||||
}
|
||||
}
|
||||
|
||||
return iExitCode;
|
||||
}
|
||||
|
||||
PRIV_SHELL_CMD_FUNCTION(MBServer, a Mtcp server Demo, PRIV_SHELL_CMD_MAIN_ATTR);
|
||||
|
||||
|
||||
BOOL bCreatePollingThread( void )
|
||||
{
|
||||
BOOL bResult;
|
||||
pthread_t xThread;
|
||||
if( eGetPollingThreadState( ) == STOPPED )
|
||||
{
|
||||
if( pthread_create( &xThread, NULL, pvPollingThread, NULL ) != 0 )
|
||||
{
|
||||
/* Can't create the polling thread. */
|
||||
bResult = FALSE;
|
||||
}
|
||||
else
|
||||
{
|
||||
bResult = TRUE;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
bResult = FALSE;
|
||||
}
|
||||
return bResult;
|
||||
}
|
||||
|
||||
|
||||
void* pvPollingThread( void *pvParameter )
|
||||
{
|
||||
eSetPollingThreadState( RUNNING );
|
||||
|
||||
if( eMBEnable( ) == MB_ENOERR )
|
||||
{
|
||||
do
|
||||
{
|
||||
if( eMBPoll( ) != MB_ENOERR )
|
||||
break;
|
||||
}
|
||||
while( eGetPollingThreadState( ) != SHUTDOWN );
|
||||
}
|
||||
|
||||
( void )eMBDisable( );
|
||||
|
||||
eSetPollingThreadState( STOPPED );
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
enum ThreadState eGetPollingThreadState( )
|
||||
{
|
||||
enum ThreadState eCurState;
|
||||
|
||||
( void )pthread_mutex_lock( &xLock );
|
||||
eCurState = ePollThreadState;
|
||||
( void )pthread_mutex_unlock( &xLock );
|
||||
|
||||
return eCurState;
|
||||
}
|
||||
|
||||
void eSetPollingThreadState( enum ThreadState eNewState )
|
||||
{
|
||||
( void )pthread_mutex_lock( &xLock );
|
||||
ePollThreadState = eNewState;
|
||||
( void )pthread_mutex_unlock( &xLock );
|
||||
}
|
||||
|
||||
eMBErrorCode eMBRegInputCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
int iRegIndex;
|
||||
|
||||
if( ( usAddress >= REG_INPUT_START )
|
||||
&& ( usAddress + usNRegs <= REG_INPUT_START + REG_INPUT_NREGS ) )
|
||||
{
|
||||
iRegIndex = ( int )( usAddress - usRegInputStart );
|
||||
while( usNRegs > 0 )
|
||||
{
|
||||
*pucRegBuffer++ = ( unsigned char )( usRegInputBuf[iRegIndex] >> 8 );
|
||||
*pucRegBuffer++ = ( unsigned char )( usRegInputBuf[iRegIndex] & 0xFF );
|
||||
iRegIndex++;
|
||||
usNRegs--;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_ENOREG;
|
||||
}
|
||||
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
eMBErrorCode eMBRegHoldingCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs, eMBRegisterMode eMode )
|
||||
{
|
||||
eMBErrorCode eStatus = MB_ENOERR;
|
||||
int iRegIndex;
|
||||
|
||||
if( ( usAddress >= REG_HOLDING_START ) &&
|
||||
( usAddress + usNRegs <= REG_HOLDING_START + REG_HOLDING_NREGS ) )
|
||||
{
|
||||
iRegIndex = ( int )( usAddress - usRegHoldingStart );
|
||||
switch ( eMode )
|
||||
{
|
||||
/* Pass current register values to the protocol stack. */
|
||||
case MB_REG_READ:
|
||||
while( usNRegs > 0 )
|
||||
{
|
||||
*pucRegBuffer++ = ( UCHAR ) ( usRegHoldingBuf[iRegIndex] >> 8 );
|
||||
*pucRegBuffer++ = ( UCHAR ) ( usRegHoldingBuf[iRegIndex] & 0xFF );
|
||||
iRegIndex++;
|
||||
usNRegs--;
|
||||
}
|
||||
break;
|
||||
|
||||
/* Update current register values with new values from the
|
||||
* protocol stack. */
|
||||
case MB_REG_WRITE:
|
||||
while( usNRegs > 0 )
|
||||
{
|
||||
usRegHoldingBuf[iRegIndex] = *pucRegBuffer++ << 8;
|
||||
usRegHoldingBuf[iRegIndex] |= *pucRegBuffer++;
|
||||
iRegIndex++;
|
||||
usNRegs--;
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
eStatus = MB_ENOREG;
|
||||
}
|
||||
return eStatus;
|
||||
}
|
||||
|
||||
|
||||
eMBErrorCode eMBRegCoilsCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNCoils, eMBRegisterMode eMode )
|
||||
{
|
||||
return MB_ENOREG;
|
||||
}
|
||||
|
||||
eMBErrorCode eMBRegDiscreteCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNDiscrete )
|
||||
{
|
||||
return MB_ENOREG;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* @description: Modbus Tcp Server Open
|
||||
* @param control_protocol - control protocol pointer
|
||||
* @return success : 0 error
|
||||
*/
|
||||
// int FreeModbusTcpOpen(struct ControlProtocol *control_protocol)
|
||||
// {
|
||||
// ControlProtocolOpenDef(control_protocol);
|
||||
// return 0;
|
||||
// }
|
||||
|
||||
// static struct ControlDone FreeModbusTcp_protocol_done =
|
||||
// {
|
||||
// ._open = FreeModbusTcpOpen,
|
||||
// ._close = NULL,
|
||||
// ._read = NULL,
|
||||
// ._write = NULL,
|
||||
// ._ioctl = NULL,
|
||||
// };
|
||||
|
||||
// void *ReceivePlcDataTask(void *parameter)
|
||||
// {
|
||||
// MBServer();
|
||||
// }
|
||||
|
||||
/**
|
||||
* @description: Modbus Tcp Server Init
|
||||
* @param p_recipe - recipe pointer
|
||||
* @return success : 0 error : -1
|
||||
*/
|
||||
// int FreeModbusTcpServerInit(struct ControlRecipe *p_recipe)
|
||||
// {
|
||||
// p_recipe->done = &FreeModbusTcp_protocol_done;
|
||||
// return 0;
|
||||
// }
|
||||
Reference in New Issue
Block a user