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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2020-2021 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/runtime.h"
#include "py/ringbuf.h"
#include "py/mphal.h"
#include "uart.h"
#include "hardware/uart.h"
#include "hardware/irq.h"
#include "hardware/regs/uart.h"
#if MICROPY_HW_ENABLE_UART_REPL
void uart_irq(void) {
uart_get_hw(uart_default)->icr = UART_UARTICR_BITS; // clear interrupt flags
if (uart_is_readable(uart_default)) {
int c = uart_getc(uart_default);
#if MICROPY_KBD_EXCEPTION
if (c == mp_interrupt_char) {
mp_keyboard_interrupt();
return;
}
#endif
ringbuf_put(&stdin_ringbuf, c);
}
}
void mp_uart_init(void) {
uart_get_hw(uart_default)->imsc = UART_UARTIMSC_BITS; // enable mask
uint irq_num = uart_get_index(uart_default) ? UART1_IRQ : UART0_IRQ;
irq_set_exclusive_handler(irq_num, uart_irq);
irq_set_enabled(irq_num, true); // enable irq
}
void mp_uart_write_strn(const char *str, size_t len) {
uart_write_blocking(uart_default, (const uint8_t *)str, len);
}
#endif
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