forked from xuos/xiuos
108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2017 Armink (armink.ztl@gmail.com)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <rtthread.h>
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#include <rtdevice.h>
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#include <rthw.h>
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#include "lib/utils/interrupt_char.h"
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#include "mpgetcharport.h"
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#define UART_FIFO_SIZE 256
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static struct rt_ringbuffer *rx_fifo = NULL;
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static rt_err_t (*odev_rx_ind)(rt_device_t dev, rt_size_t size) = NULL;
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static rt_err_t getchar_rx_ind(rt_device_t dev, rt_size_t size) {
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uint8_t ch;
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rt_size_t i;
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rt_base_t int_lvl;
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for (i = 0; i < size; i++) {
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/* read a char */
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if (rt_device_read(dev, 0, &ch, 1)) {
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if (ch == mp_interrupt_char) {
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mp_keyboard_interrupt();
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} else {
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int_lvl = rt_hw_interrupt_disable();
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rt_ringbuffer_put_force(rx_fifo, &ch, 1);
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rt_hw_interrupt_enable(int_lvl);
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}
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}
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}
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return RT_EOK;
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}
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void mp_getchar_init(void) {
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rt_base_t int_lvl;
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rt_device_t console;
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/* create RX FIFO */
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rx_fifo = rt_ringbuffer_create(UART_FIFO_SIZE);
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/* created must success */
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RT_ASSERT(rx_fifo);
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int_lvl = rt_hw_interrupt_disable();
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console = rt_console_get_device();
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if (console) {
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/* backup RX indicate */
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odev_rx_ind = console->rx_indicate;
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rt_device_set_rx_indicate(console, getchar_rx_ind);
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}
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rt_hw_interrupt_enable(int_lvl);
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}
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void mp_getchar_deinit(void) {
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rt_base_t int_lvl;
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rt_device_t console;
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rt_ringbuffer_destroy(rx_fifo);
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int_lvl = rt_hw_interrupt_disable();
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console = rt_console_get_device();
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if (console && odev_rx_ind) {
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/* restore RX indicate */
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rt_device_set_rx_indicate(console, odev_rx_ind);
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}
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rt_hw_interrupt_enable(int_lvl);
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}
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int mp_getchar(void) {
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uint8_t ch;
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rt_base_t int_lvl;
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int_lvl = rt_hw_interrupt_disable();
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if (!rt_ringbuffer_getchar(rx_fifo, &ch)) {
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ch = 0xFF;
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}
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rt_hw_interrupt_enable(int_lvl);
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return ch;
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}
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