525 lines
16 KiB
C
525 lines
16 KiB
C
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/*
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ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file hal_uart.c
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* @brief UART Driver code.
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*
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* @addtogroup UART
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* @{
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*/
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#include "hal.h"
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#if (HAL_USE_UART == TRUE) || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local variables and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief UART Driver initialization.
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* @note This function is implicitly invoked by @p halInit(), there is
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* no need to explicitly initialize the driver.
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*
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* @init
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*/
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void uartInit(void) {
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uart_lld_init();
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}
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/**
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* @brief Initializes the standard part of a @p UARTDriver structure.
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*
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* @param[out] uartp pointer to the @p UARTDriver object
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*
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* @init
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*/
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void uartObjectInit(UARTDriver *uartp) {
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uartp->state = UART_STOP;
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uartp->txstate = UART_TX_IDLE;
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uartp->rxstate = UART_RX_IDLE;
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uartp->config = NULL;
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#if UART_USE_WAIT == TRUE
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uartp->early = false;
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uartp->threadrx = NULL;
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uartp->threadtx = NULL;
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#endif /* UART_USE_WAIT */
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#if UART_USE_MUTUAL_EXCLUSION == TRUE
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osalMutexObjectInit(&uartp->mutex);
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#endif /* UART_USE_MUTUAL_EXCLUSION */
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/* Optional, user-defined initializer.*/
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#if defined(UART_DRIVER_EXT_INIT_HOOK)
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UART_DRIVER_EXT_INIT_HOOK(uartp);
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#endif
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}
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/**
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* @brief Configures and activates the UART peripheral.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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* @param[in] config pointer to the @p UARTConfig object
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*
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* @api
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*/
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void uartStart(UARTDriver *uartp, const UARTConfig *config) {
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osalDbgCheck((uartp != NULL) && (config != NULL));
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osalSysLock();
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osalDbgAssert((uartp->state == UART_STOP) || (uartp->state == UART_READY),
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"invalid state");
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uartp->config = config;
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uart_lld_start(uartp);
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uartp->state = UART_READY;
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osalSysUnlock();
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}
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/**
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* @brief Deactivates the UART peripheral.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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*
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* @api
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*/
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void uartStop(UARTDriver *uartp) {
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osalDbgCheck(uartp != NULL);
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osalSysLock();
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osalDbgAssert((uartp->state == UART_STOP) || (uartp->state == UART_READY),
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"invalid state");
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uart_lld_stop(uartp);
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uartp->config = NULL;
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uartp->state = UART_STOP;
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uartp->txstate = UART_TX_IDLE;
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uartp->rxstate = UART_RX_IDLE;
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osalSysUnlock();
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}
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/**
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* @brief Starts a transmission on the UART peripheral.
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* @note The buffers are organized as uint8_t arrays for data sizes below
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* or equal to 8 bits else it is organized as uint16_t arrays.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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* @param[in] n number of data frames to send
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* @param[in] txbuf the pointer to the transmit buffer
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*
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* @api
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*/
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void uartStartSend(UARTDriver *uartp, size_t n, const void *txbuf) {
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osalDbgCheck((uartp != NULL) && (n > 0U) && (txbuf != NULL));
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osalSysLock();
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osalDbgAssert(uartp->state == UART_READY, "is active");
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osalDbgAssert(uartp->txstate != UART_TX_ACTIVE, "tx active");
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uart_lld_start_send(uartp, n, txbuf);
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uartp->txstate = UART_TX_ACTIVE;
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osalSysUnlock();
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}
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/**
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* @brief Starts a transmission on the UART peripheral.
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* @note The buffers are organized as uint8_t arrays for data sizes below
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* or equal to 8 bits else it is organized as uint16_t arrays.
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* @note This function has to be invoked from a lock zone.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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* @param[in] n number of data frames to send
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* @param[in] txbuf the pointer to the transmit buffer
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*
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* @iclass
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*/
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void uartStartSendI(UARTDriver *uartp, size_t n, const void *txbuf) {
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osalDbgCheckClassI();
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osalDbgCheck((uartp != NULL) && (n > 0U) && (txbuf != NULL));
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osalDbgAssert(uartp->state == UART_READY, "is active");
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osalDbgAssert(uartp->txstate != UART_TX_ACTIVE, "tx active");
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uart_lld_start_send(uartp, n, txbuf);
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uartp->txstate = UART_TX_ACTIVE;
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}
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/**
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* @brief Stops any ongoing transmission.
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* @note Stopping a transmission also suppresses the transmission callbacks.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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*
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* @return The number of data frames not transmitted by the
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* stopped transmit operation.
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* @retval UART_ERR_NOT_ACTIVE if there was no transmit operation in progress.
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*
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* @api
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*/
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size_t uartStopSend(UARTDriver *uartp) {
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size_t n;
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osalDbgCheck(uartp != NULL);
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osalSysLock();
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osalDbgAssert(uartp->state == UART_READY, "not active");
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if (uartp->txstate == UART_TX_ACTIVE) {
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n = uart_lld_stop_send(uartp);
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uartp->txstate = UART_TX_IDLE;
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}
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else {
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n = UART_ERR_NOT_ACTIVE;
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}
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osalSysUnlock();
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return n;
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}
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/**
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* @brief Stops any ongoing transmission.
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* @note Stopping a transmission also suppresses the transmission callbacks.
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* @note This function has to be invoked from a lock zone.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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*
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* @return The number of data frames not transmitted by the
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* stopped transmit operation.
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* @retval UART_ERR_NOT_ACTIVE if there was no transmit operation in progress.
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*
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* @iclass
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*/
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size_t uartStopSendI(UARTDriver *uartp) {
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osalDbgCheckClassI();
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osalDbgCheck(uartp != NULL);
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osalDbgAssert(uartp->state == UART_READY, "not active");
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if (uartp->txstate == UART_TX_ACTIVE) {
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size_t n = uart_lld_stop_send(uartp);
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uartp->txstate = UART_TX_IDLE;
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return n;
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}
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return UART_ERR_NOT_ACTIVE;
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}
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/**
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* @brief Starts a receive operation on the UART peripheral.
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* @note The buffers are organized as uint8_t arrays for data sizes below
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* or equal to 8 bits else it is organized as uint16_t arrays.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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* @param[in] n number of data frames to receive
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* @param[in] rxbuf the pointer to the receive buffer
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*
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* @api
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*/
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void uartStartReceive(UARTDriver *uartp, size_t n, void *rxbuf) {
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osalDbgCheck((uartp != NULL) && (n > 0U) && (rxbuf != NULL));
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osalSysLock();
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osalDbgAssert(uartp->state == UART_READY, "is active");
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osalDbgAssert(uartp->rxstate != UART_RX_ACTIVE, "rx active");
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uart_lld_start_receive(uartp, n, rxbuf);
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uartp->rxstate = UART_RX_ACTIVE;
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osalSysUnlock();
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}
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/**
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* @brief Starts a receive operation on the UART peripheral.
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* @note The buffers are organized as uint8_t arrays for data sizes below
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* or equal to 8 bits else it is organized as uint16_t arrays.
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* @note This function has to be invoked from a lock zone.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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* @param[in] n number of data frames to receive
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* @param[out] rxbuf the pointer to the receive buffer
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*
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* @iclass
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*/
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void uartStartReceiveI(UARTDriver *uartp, size_t n, void *rxbuf) {
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osalDbgCheckClassI();
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osalDbgCheck((uartp != NULL) && (n > 0U) && (rxbuf != NULL));
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osalDbgAssert(uartp->state == UART_READY, "is active");
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osalDbgAssert(uartp->rxstate != UART_RX_ACTIVE, "rx active");
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uart_lld_start_receive(uartp, n, rxbuf);
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uartp->rxstate = UART_RX_ACTIVE;
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}
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/**
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* @brief Stops any ongoing receive operation.
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* @note Stopping a receive operation also suppresses the receive callbacks.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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*
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* @return The number of data frames not received by the
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* stopped receive operation.
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* @retval UART_ERR_NOT_ACTIVE if there was no receive operation in progress.
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*
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* @api
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*/
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size_t uartStopReceive(UARTDriver *uartp) {
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size_t n;
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osalDbgCheck(uartp != NULL);
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osalSysLock();
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osalDbgAssert(uartp->state == UART_READY, "not active");
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if (uartp->rxstate == UART_RX_ACTIVE) {
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n = uart_lld_stop_receive(uartp);
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uartp->rxstate = UART_RX_IDLE;
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}
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else {
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n = UART_ERR_NOT_ACTIVE;
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}
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osalSysUnlock();
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return n;
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}
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/**
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* @brief Stops any ongoing receive operation.
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* @note Stopping a receive operation also suppresses the receive callbacks.
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* @note This function has to be invoked from a lock zone.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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*
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* @return The number of data frames not received by the
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* stopped receive operation.
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* @retval UART_ERR_NOT_ACTIVE if there was no receive operation in progress.
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*
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* @iclass
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*/
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size_t uartStopReceiveI(UARTDriver *uartp) {
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osalDbgCheckClassI();
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osalDbgCheck(uartp != NULL);
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osalDbgAssert(uartp->state == UART_READY, "not active");
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if (uartp->rxstate == UART_RX_ACTIVE) {
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size_t n = uart_lld_stop_receive(uartp);
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uartp->rxstate = UART_RX_IDLE;
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return n;
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}
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return UART_ERR_NOT_ACTIVE;
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}
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#if (UART_USE_WAIT == TRUE) || defined(__DOXYGEN__)
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/**
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* @brief Performs a transmission on the UART peripheral.
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* @note The function returns when the specified number of frames have been
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* sent to the UART or on timeout.
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* @note The buffers are organized as uint8_t arrays for data sizes below
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* or equal to 8 bits else it is organized as uint16_t arrays.
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* @note This function implements a software timeout, it does not use
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* any underlying HW timeout mechanism.
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*
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* @param[in] uartp pointer to the @p UARTDriver object
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* @param[in,out] np number of data frames to transmit, on exit the number
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* of frames actually transmitted
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* @param[in] txbuf the pointer to the transmit buffer
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* @param[in] timeout operation timeout
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* @return The operation status.
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* @retval MSG_OK if the operation completed successfully.
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* @retval MSG_TIMEOUT if the operation timed out.
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*
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* @api
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*/
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msg_t uartSendTimeout(UARTDriver *uartp, size_t *np,
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const void *txbuf, sysinterval_t timeout) {
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msg_t msg;
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osalDbgCheck((uartp != NULL) && (*np > 0U) && (txbuf != NULL));
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osalSysLock();
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osalDbgAssert(uartp->state == UART_READY, "is active");
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osalDbgAssert(uartp->txstate != UART_TX_ACTIVE, "tx active");
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/* Transmission start.*/
|
||
|
|
uartp->early = true;
|
||
|
|
uart_lld_start_send(uartp, *np, txbuf);
|
||
|
|
uartp->txstate = UART_TX_ACTIVE;
|
||
|
|
|
||
|
|
/* Waiting for result.*/
|
||
|
|
msg = osalThreadSuspendTimeoutS(&uartp->threadtx, timeout);
|
||
|
|
if (msg != MSG_OK) {
|
||
|
|
*np -= uartStopSendI(uartp);
|
||
|
|
}
|
||
|
|
osalSysUnlock();
|
||
|
|
|
||
|
|
return msg;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Performs a transmission on the UART peripheral.
|
||
|
|
* @note The function returns when the specified number of frames have been
|
||
|
|
* physically transmitted or on timeout.
|
||
|
|
* @note The buffers are organized as uint8_t arrays for data sizes below
|
||
|
|
* or equal to 8 bits else it is organized as uint16_t arrays.
|
||
|
|
* @note This function implements a software timeout, it does not use
|
||
|
|
* any underlying HW timeout mechanism.
|
||
|
|
*
|
||
|
|
* @param[in] uartp pointer to the @p UARTDriver object
|
||
|
|
* @param[in,out] np number of data frames to transmit, on exit the number
|
||
|
|
* of frames actually transmitted
|
||
|
|
* @param[in] txbuf the pointer to the transmit buffer
|
||
|
|
* @param[in] timeout operation timeout
|
||
|
|
* @return The operation status.
|
||
|
|
* @retval MSG_OK if the operation completed successfully.
|
||
|
|
* @retval MSG_TIMEOUT if the operation timed out.
|
||
|
|
*
|
||
|
|
* @api
|
||
|
|
*/
|
||
|
|
msg_t uartSendFullTimeout(UARTDriver *uartp, size_t *np,
|
||
|
|
const void *txbuf, sysinterval_t timeout) {
|
||
|
|
msg_t msg;
|
||
|
|
|
||
|
|
osalDbgCheck((uartp != NULL) && (*np > 0U) && (txbuf != NULL));
|
||
|
|
|
||
|
|
osalSysLock();
|
||
|
|
osalDbgAssert(uartp->state == UART_READY, "is active");
|
||
|
|
osalDbgAssert(uartp->txstate != UART_TX_ACTIVE, "tx active");
|
||
|
|
|
||
|
|
/* Transmission start.*/
|
||
|
|
uartp->early = false;
|
||
|
|
uart_lld_start_send(uartp, *np, txbuf);
|
||
|
|
uartp->txstate = UART_TX_ACTIVE;
|
||
|
|
|
||
|
|
/* Waiting for result.*/
|
||
|
|
msg = osalThreadSuspendTimeoutS(&uartp->threadtx, timeout);
|
||
|
|
if (msg != MSG_OK) {
|
||
|
|
*np = uartStopSendI(uartp);
|
||
|
|
}
|
||
|
|
osalSysUnlock();
|
||
|
|
|
||
|
|
return msg;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Performs a receive operation on the UART peripheral.
|
||
|
|
* @note The function returns when the specified number of frames have been
|
||
|
|
* received or on error/timeout.
|
||
|
|
* @note The buffers are organized as uint8_t arrays for data sizes below
|
||
|
|
* or equal to 8 bits else it is organized as uint16_t arrays.
|
||
|
|
* @note This function implements a software timeout, it does not use
|
||
|
|
* any underlying HW timeout mechanism.
|
||
|
|
*
|
||
|
|
* @param[in] uartp pointer to the @p UARTDriver object
|
||
|
|
* @param[in,out] np number of data frames to receive, on exit the number
|
||
|
|
* of frames actually received
|
||
|
|
* @param[in] rxbuf the pointer to the receive buffer
|
||
|
|
* @param[in] timeout operation timeout
|
||
|
|
*
|
||
|
|
* @return The operation status.
|
||
|
|
* @retval MSG_OK if the operation completed successfully.
|
||
|
|
* @retval MSG_TIMEOUT if the operation timed out.
|
||
|
|
* @retval MSG_RESET in case of a receive error.
|
||
|
|
*
|
||
|
|
* @api
|
||
|
|
*/
|
||
|
|
msg_t uartReceiveTimeout(UARTDriver *uartp, size_t *np,
|
||
|
|
void *rxbuf, sysinterval_t timeout) {
|
||
|
|
msg_t msg;
|
||
|
|
|
||
|
|
osalDbgCheck((uartp != NULL) && (*np > 0U) && (rxbuf != NULL));
|
||
|
|
|
||
|
|
osalSysLock();
|
||
|
|
osalDbgAssert(uartp->state == UART_READY, "is active");
|
||
|
|
osalDbgAssert(uartp->rxstate != UART_RX_ACTIVE, "rx active");
|
||
|
|
|
||
|
|
/* Receive start.*/
|
||
|
|
uart_lld_start_receive(uartp, *np, rxbuf);
|
||
|
|
uartp->rxstate = UART_RX_ACTIVE;
|
||
|
|
|
||
|
|
/* Waiting for result.*/
|
||
|
|
msg = osalThreadSuspendTimeoutS(&uartp->threadrx, timeout);
|
||
|
|
if (msg != MSG_OK) {
|
||
|
|
*np -= uartStopReceiveI(uartp);
|
||
|
|
}
|
||
|
|
osalSysUnlock();
|
||
|
|
|
||
|
|
return msg;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if (UART_USE_MUTUAL_EXCLUSION == TRUE) || defined(__DOXYGEN__)
|
||
|
|
/**
|
||
|
|
* @brief Gains exclusive access to the UART bus.
|
||
|
|
* @details This function tries to gain ownership to the UART bus, if the bus
|
||
|
|
* is already being used then the invoking thread is queued.
|
||
|
|
* @pre In order to use this function the option @p UART_USE_MUTUAL_EXCLUSION
|
||
|
|
* must be enabled.
|
||
|
|
*
|
||
|
|
* @param[in] uartp pointer to the @p UARTDriver object
|
||
|
|
*
|
||
|
|
* @api
|
||
|
|
*/
|
||
|
|
void uartAcquireBus(UARTDriver *uartp) {
|
||
|
|
|
||
|
|
osalDbgCheck(uartp != NULL);
|
||
|
|
|
||
|
|
osalMutexLock(&uartp->mutex);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Releases exclusive access to the UART bus.
|
||
|
|
* @pre In order to use this function the option @p UART_USE_MUTUAL_EXCLUSION
|
||
|
|
* must be enabled.
|
||
|
|
*
|
||
|
|
* @param[in] uartp pointer to the @p UARTDriver object
|
||
|
|
*
|
||
|
|
* @api
|
||
|
|
*/
|
||
|
|
void uartReleaseBus(UARTDriver *uartp) {
|
||
|
|
|
||
|
|
osalDbgCheck(uartp != NULL);
|
||
|
|
|
||
|
|
osalMutexUnlock(&uartp->mutex);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* HAL_USE_UART == TRUE */
|
||
|
|
|
||
|
|
/** @} */
|