Add nuttx to the system framework, which is 10.1.0

2021-06-09 14:33:15 +08:00
parent 06c351e27c
commit 804bd57aa0
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+/****************************************************************************
+ * apps/include/modbus/mbutils.h
+ *
+ * FreeModbus Library: A portable Modbus implementation for Modbus ASCII/RTU.
+ * Copyright (c) 2006 Christian Walter <wolti@sil.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 __APPS_INCLUDE_MODBUS_MBUTILS_H
+#define __APPS_INCLUDE_MODBUS_MBUTILS_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* 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.
+ */
+
+/* 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.
+ *
+ * Input Parameters:
+ *  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.
+ *  usBitOffset The starting address of the bits to set. The first
+ *     bit has the offset 0.
+ *  ucNBits Number of bits to modify. The value must always be smaller
+ *     than 8.
+ *  ucValues Thew new values for the bits. The value for the first bit
+ *     starting at usBitOffset is the LSB of the value ucValues
+ *
+ *   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);
+ */
+
+void xMBUtilSetBits(uint8_t *ucByteBuf, uint16_t usBitOffset,
+                    uint8_t ucNBits, uint8_t ucValues);
+
+/* 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.
+ *
+ * Input Parameters:
+ *  ucByteBuf A buffer where the bit values are stored.
+ *  usBitOffset The starting address of the bits to set. The first
+ *     bit has the offset 0.
+ *  ucNBits Number of bits to modify. The value must always be smaller
+ *     than 8.
+ *
+ *   uint8_t ucBits[2] = {0, 0};
+ *   uint8_t ucResult;
+ *
+ *   // Extract the bits 3 - 10.
+ *
+ *   ucResult = xMBUtilGetBits(ucBits, 3, 8);
+ */
+
+uint8_t xMBUtilGetBits(uint8_t *ucByteBuf, uint16_t usBitOffset, uint8_t ucNBits);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __APPS_INCLUDE_MODBUS_MBUTILS_H */