78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
// Copyright 2024 Stefan Kerkmann (@KarlK90)
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// Copyright 2021 QMK
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "uart.h"
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#if defined(MCU_RP)
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// 38400 baud, 8 data bits, 1 stop bit, no parity, no flow control
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static SIOConfig sioConfig = {
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.baud = SIO_DEFAULT_BITRATE,
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.UARTLCR_H = (UART_UARTLCR_H_WLEN_8BITS | UART_UARTLCR_H_FEN),
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.UARTCR = 0U,
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.UARTIFLS = (UART_UARTIFLS_RXIFLSEL_1_8F | UART_UARTIFLS_TXIFLSEL_1_8E),
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.UARTDMACR = 0U,
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};
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#else
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static SIOConfig sioConfig = {
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.baud = SIO_DEFAULT_BITRATE,
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# if defined(MCU_STM32) && defined(USE_USARTV3)
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.presc = USART_PRESC1,
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# endif
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.cr1 = UART_CR1,
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.cr2 = UART_CR2,
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.cr3 = UART_CR3,
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};
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#endif
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void uart_init(uint32_t baud) {
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static bool is_initialised = false;
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if (is_initialised) {
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return;
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}
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is_initialised = true;
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sioConfig.baud = baud;
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#if defined(USE_GPIOV1)
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palSetLineMode(UART_TX_PIN, UART_TX_PAL_MODE);
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palSetLineMode(UART_RX_PIN, UART_RX_PAL_MODE);
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#else
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palSetLineMode(UART_TX_PIN, PAL_MODE_ALTERNATE(UART_TX_PAL_MODE) | PAL_OUTPUT_TYPE_PUSHPULL | PAL_OUTPUT_SPEED_HIGHEST);
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palSetLineMode(UART_RX_PIN, PAL_MODE_ALTERNATE(UART_RX_PAL_MODE) | PAL_OUTPUT_TYPE_PUSHPULL | PAL_OUTPUT_SPEED_HIGHEST);
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#endif
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sioStart(&UART_DRIVER, &sioConfig);
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}
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void uart_write(uint8_t data) {
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chnPutTimeout(&UART_DRIVER, data, TIME_INFINITE);
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}
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uint8_t uart_read(void) {
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msg_t result = chnGetTimeout(&UART_DRIVER, TIME_INFINITE);
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if (sioHasRXErrorsX(&UART_DRIVER)) {
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sioGetAndClearErrors(&UART_DRIVER);
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}
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return (uint8_t)result;
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}
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void uart_transmit(const uint8_t *data, uint16_t length) {
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chnWrite(&UART_DRIVER, data, length);
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}
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void uart_receive(uint8_t *data, uint16_t length) {
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chnRead(&UART_DRIVER, data, length);
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if (sioHasRXErrorsX(&UART_DRIVER)) {
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sioGetAndClearErrors(&UART_DRIVER);
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}
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}
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bool uart_available() {
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return !sioIsRXEmptyX(&UART_DRIVER);
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}
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