mirror of
https://github.com/m5stack/M5Stack_MicroPython.git
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85 lines
3.0 KiB
C
85 lines
3.0 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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* Development of the code in this file was sponsored by Microbric Pty Ltd
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2016 Damien P. George
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* Copyright (c) 2018 LoBo (https://github.com/loboris)
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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 "driver/uart.h"
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#include "uart.h"
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#include "py/mpstate.h"
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#include "py/mphal.h"
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STATIC void uart_irq_handler(void *arg);
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QueueHandle_t uart0_mutex = NULL;
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QueueSetMemberHandle_t uart0_semaphore = NULL;
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int uart0_raw_input = 0;
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static uart_isr_handle_t uart0_handle = NULL;
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//------------------
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void uart_init(void)
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{
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if (uart0_mutex == NULL) uart0_mutex = xSemaphoreCreateMutex();
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if (uart0_semaphore == NULL) uart0_semaphore = xSemaphoreCreateBinary();
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if (uart0_handle == NULL) {
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uart_isr_register(UART_NUM_0, uart_irq_handler, NULL, ESP_INTR_FLAG_LOWMED | ESP_INTR_FLAG_IRAM, &uart0_handle);
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uart_enable_rx_intr(UART_NUM_0);
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}
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}
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// all code executed in ISR must be in IRAM, and any const data must be in DRAM
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//-----------------------------------------------
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STATIC void IRAM_ATTR uart_irq_handler(void *arg)
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{
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volatile uart_dev_t *uart = &UART0;
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static int xHigherPriorityTaskWoken;
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uart->int_clr.rxfifo_full = 1;
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uart->int_clr.frm_err = 1;
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uart->int_clr.rxfifo_tout = 1;
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xHigherPriorityTaskWoken = pdFALSE;
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while (uart->status.rxfifo_cnt) {
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uint8_t c = uart->fifo.rw_byte;
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if ((uart0_raw_input == 0) && (c == mp_interrupt_char)) {
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// inline version of mp_keyboard_interrupt();
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MP_STATE_VM(mp_pending_exception) = MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_kbd_exception));
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#if MICROPY_ENABLE_SCHEDULER
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if (MP_STATE_VM(sched_state) == MP_SCHED_IDLE) {
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MP_STATE_VM(sched_state) = MP_SCHED_PENDING;
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}
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#endif
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}
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else {
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// this is an inline function so will be in IRAM
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ringbuf_put(&stdin_ringbuf, c);
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}
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}
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xSemaphoreGiveFromISR( uart0_semaphore, &xHigherPriorityTaskWoken );}
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