64 lines
2.2 KiB
C
64 lines
2.2 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) 2020-2021 Damien P. George
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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 "py/runtime.h"
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#include "py/ringbuf.h"
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#include "py/mphal.h"
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#include "uart.h"
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#include "hardware/uart.h"
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#include "hardware/irq.h"
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#include "hardware/regs/uart.h"
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#if MICROPY_HW_ENABLE_UART_REPL
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void uart_irq(void) {
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uart_get_hw(uart_default)->icr = UART_UARTICR_BITS; // clear interrupt flags
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if (uart_is_readable(uart_default)) {
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int c = uart_getc(uart_default);
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#if MICROPY_KBD_EXCEPTION
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if (c == mp_interrupt_char) {
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mp_keyboard_interrupt();
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return;
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}
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#endif
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ringbuf_put(&stdin_ringbuf, c);
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}
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}
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void mp_uart_init(void) {
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uart_get_hw(uart_default)->imsc = UART_UARTIMSC_BITS; // enable mask
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uint irq_num = uart_get_index(uart_default) ? UART1_IRQ : UART0_IRQ;
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irq_set_exclusive_handler(irq_num, uart_irq);
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irq_set_enabled(irq_num, true); // enable irq
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}
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void mp_uart_write_strn(const char *str, size_t len) {
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uart_write_blocking(uart_default, (const uint8_t *)str, len);
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}
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#endif
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