109 lines
3.7 KiB
C
109 lines
3.7 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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*
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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 "soc/uart_periph.h"
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "uart.h"
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STATIC void uart_irq_handler(void *arg);
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void uart_stdout_init(void) {
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uart_config_t uartcfg = {
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.baud_rate = MICROPY_HW_UART_REPL_BAUD,
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.data_bits = UART_DATA_8_BITS,
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.parity = UART_PARITY_DISABLE,
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.stop_bits = UART_STOP_BITS_1,
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.flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
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.rx_flow_ctrl_thresh = 0
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};
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#if SOC_UART_SUPPORT_XTAL_CLK
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// works independently of APB frequency
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uartcfg.source_clk = UART_SCLK_XTAL; // ESP32C3, ESP32S3
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#endif
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uart_param_config(MICROPY_HW_UART_REPL, &uartcfg);
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const uint32_t rxbuf = 129; // IDF requires > 128 min
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const uint32_t txbuf = 0;
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uart_driver_install(MICROPY_HW_UART_REPL, rxbuf, txbuf, 0, NULL, 0);
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uart_isr_handle_t handle;
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uart_isr_free(MICROPY_HW_UART_REPL);
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uart_isr_register(MICROPY_HW_UART_REPL, uart_irq_handler, NULL, ESP_INTR_FLAG_LOWMED | ESP_INTR_FLAG_IRAM, &handle);
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uart_enable_rx_intr(MICROPY_HW_UART_REPL);
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}
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int uart_stdout_tx_strn(const char *str, size_t len) {
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size_t remaining = len;
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// TODO add a timeout
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for (;;) {
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int ret = uart_tx_chars(MICROPY_HW_UART_REPL, str, remaining);
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if (ret == -1) {
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return -1;
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}
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remaining -= ret;
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if (remaining <= 0) {
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break;
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}
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str += ret;
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ulTaskNotifyTake(pdFALSE, 1);
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}
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return len - remaining;
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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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STATIC void IRAM_ATTR uart_irq_handler(void *arg) {
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volatile uart_dev_t *uart = &UART0;
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#if CONFIG_IDF_TARGET_ESP32S3
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uart->int_clr.rxfifo_full_int_clr = 1;
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uart->int_clr.rxfifo_tout_int_clr = 1;
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#else
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uart->int_clr.rxfifo_full = 1;
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uart->int_clr.rxfifo_tout = 1;
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uart->int_clr.frm_err = 1;
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#endif
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while (uart->status.rxfifo_cnt) {
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#if CONFIG_IDF_TARGET_ESP32
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uint8_t c = uart->fifo.rw_byte;
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#elif CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32S3
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uint8_t c = READ_PERI_REG(UART_FIFO_AHB_REG(0)); // UART0
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#endif
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if (c == mp_interrupt_char) {
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mp_sched_keyboard_interrupt();
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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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}
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