You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
525 lines
16 KiB
C
525 lines
16 KiB
C
/*
|
|
ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
/**
|
|
* @file hal_uart.c
|
|
* @brief UART Driver code.
|
|
*
|
|
* @addtogroup UART
|
|
* @{
|
|
*/
|
|
|
|
#include "hal.h"
|
|
|
|
#if (HAL_USE_UART == TRUE) || defined(__DOXYGEN__)
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local definitions. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver exported variables. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local variables and types. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local functions. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver exported functions. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief UART Driver initialization.
|
|
* @note This function is implicitly invoked by @p halInit(), there is
|
|
* no need to explicitly initialize the driver.
|
|
*
|
|
* @init
|
|
*/
|
|
void uartInit(void) {
|
|
|
|
uart_lld_init();
|
|
}
|
|
|
|
/**
|
|
* @brief Initializes the standard part of a @p UARTDriver structure.
|
|
*
|
|
* @param[out] uartp pointer to the @p UARTDriver object
|
|
*
|
|
* @init
|
|
*/
|
|
void uartObjectInit(UARTDriver *uartp) {
|
|
|
|
uartp->state = UART_STOP;
|
|
uartp->txstate = UART_TX_IDLE;
|
|
uartp->rxstate = UART_RX_IDLE;
|
|
uartp->config = NULL;
|
|
#if UART_USE_WAIT == TRUE
|
|
uartp->early = false;
|
|
uartp->threadrx = NULL;
|
|
uartp->threadtx = NULL;
|
|
#endif /* UART_USE_WAIT */
|
|
#if UART_USE_MUTUAL_EXCLUSION == TRUE
|
|
osalMutexObjectInit(&uartp->mutex);
|
|
#endif /* UART_USE_MUTUAL_EXCLUSION */
|
|
|
|
/* Optional, user-defined initializer.*/
|
|
#if defined(UART_DRIVER_EXT_INIT_HOOK)
|
|
UART_DRIVER_EXT_INIT_HOOK(uartp);
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* @brief Configures and activates the UART peripheral.
|
|
*
|
|
* @param[in] uartp pointer to the @p UARTDriver object
|
|
* @param[in] config pointer to the @p UARTConfig object
|
|
*
|
|
* @api
|
|
*/
|
|
void uartStart(UARTDriver *uartp, const UARTConfig *config) {
|
|
|
|
osalDbgCheck((uartp != NULL) && (config != NULL));
|
|
|
|
osalSysLock();
|
|
osalDbgAssert((uartp->state == UART_STOP) || (uartp->state == UART_READY),
|
|
"invalid state");
|
|
|
|
uartp->config = config;
|
|
uart_lld_start(uartp);
|
|
uartp->state = UART_READY;
|
|
osalSysUnlock();
|
|
}
|
|
|
|
/**
|
|
* @brief Deactivates the UART peripheral.
|
|
*
|
|
* @param[in] uartp pointer to the @p UARTDriver object
|
|
*
|
|
* @api
|
|
*/
|
|
void uartStop(UARTDriver *uartp) {
|
|
|
|
osalDbgCheck(uartp != NULL);
|
|
|
|
osalSysLock();
|
|
|
|
osalDbgAssert((uartp->state == UART_STOP) || (uartp->state == UART_READY),
|
|
"invalid state");
|
|
|
|
uart_lld_stop(uartp);
|
|
uartp->config = NULL;
|
|
uartp->state = UART_STOP;
|
|
uartp->txstate = UART_TX_IDLE;
|
|
uartp->rxstate = UART_RX_IDLE;
|
|
|
|
osalSysUnlock();
|
|
}
|
|
|
|
/**
|
|
* @brief Starts a transmission on the UART peripheral.
|
|
* @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.
|
|
*
|
|
* @param[in] uartp pointer to the @p UARTDriver object
|
|
* @param[in] n number of data frames to send
|
|
* @param[in] txbuf the pointer to the transmit buffer
|
|
*
|
|
* @api
|
|
*/
|
|
void uartStartSend(UARTDriver *uartp, size_t n, const void *txbuf) {
|
|
|
|
osalDbgCheck((uartp != NULL) && (n > 0U) && (txbuf != NULL));
|
|
|
|
osalSysLock();
|
|
osalDbgAssert(uartp->state == UART_READY, "is active");
|
|
osalDbgAssert(uartp->txstate != UART_TX_ACTIVE, "tx active");
|
|
|
|
uart_lld_start_send(uartp, n, txbuf);
|
|
uartp->txstate = UART_TX_ACTIVE;
|
|
osalSysUnlock();
|
|
}
|
|
|
|
/**
|
|
* @brief Starts a transmission on the UART peripheral.
|
|
* @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 has to be invoked from a lock zone.
|
|
*
|
|
* @param[in] uartp pointer to the @p UARTDriver object
|
|
* @param[in] n number of data frames to send
|
|
* @param[in] txbuf the pointer to the transmit buffer
|
|
*
|
|
* @iclass
|
|
*/
|
|
void uartStartSendI(UARTDriver *uartp, size_t n, const void *txbuf) {
|
|
|
|
osalDbgCheckClassI();
|
|
osalDbgCheck((uartp != NULL) && (n > 0U) && (txbuf != NULL));
|
|
osalDbgAssert(uartp->state == UART_READY, "is active");
|
|
osalDbgAssert(uartp->txstate != UART_TX_ACTIVE, "tx active");
|
|
|
|
uart_lld_start_send(uartp, n, txbuf);
|
|
uartp->txstate = UART_TX_ACTIVE;
|
|
}
|
|
|
|
/**
|
|
* @brief Stops any ongoing transmission.
|
|
* @note Stopping a transmission also suppresses the transmission callbacks.
|
|
*
|
|
* @param[in] uartp pointer to the @p UARTDriver object
|
|
*
|
|
* @return The number of data frames not transmitted by the
|
|
* stopped transmit operation.
|
|
* @retval UART_ERR_NOT_ACTIVE if there was no transmit operation in progress.
|
|
*
|
|
* @api
|
|
*/
|
|
size_t uartStopSend(UARTDriver *uartp) {
|
|
size_t n;
|
|
|
|
osalDbgCheck(uartp != NULL);
|
|
|
|
osalSysLock();
|
|
osalDbgAssert(uartp->state == UART_READY, "not active");
|
|
|
|
if (uartp->txstate == UART_TX_ACTIVE) {
|
|
n = uart_lld_stop_send(uartp);
|
|
uartp->txstate = UART_TX_IDLE;
|
|
}
|
|
else {
|
|
n = UART_ERR_NOT_ACTIVE;
|
|
}
|
|
osalSysUnlock();
|
|
|
|
return n;
|
|
}
|
|
|
|
/**
|
|
* @brief Stops any ongoing transmission.
|
|
* @note Stopping a transmission also suppresses the transmission callbacks.
|
|
* @note This function has to be invoked from a lock zone.
|
|
*
|
|
* @param[in] uartp pointer to the @p UARTDriver object
|
|
*
|
|
* @return The number of data frames not transmitted by the
|
|
* stopped transmit operation.
|
|
* @retval UART_ERR_NOT_ACTIVE if there was no transmit operation in progress.
|
|
*
|
|
* @iclass
|
|
*/
|
|
size_t uartStopSendI(UARTDriver *uartp) {
|
|
|
|
osalDbgCheckClassI();
|
|
osalDbgCheck(uartp != NULL);
|
|
osalDbgAssert(uartp->state == UART_READY, "not active");
|
|
|
|
if (uartp->txstate == UART_TX_ACTIVE) {
|
|
size_t n = uart_lld_stop_send(uartp);
|
|
uartp->txstate = UART_TX_IDLE;
|
|
return n;
|
|
}
|
|
return UART_ERR_NOT_ACTIVE;
|
|
}
|
|
|
|
/**
|
|
* @brief Starts a receive operation on the UART peripheral.
|
|
* @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.
|
|
*
|
|
* @param[in] uartp pointer to the @p UARTDriver object
|
|
* @param[in] n number of data frames to receive
|
|
* @param[in] rxbuf the pointer to the receive buffer
|
|
*
|
|
* @api
|
|
*/
|
|
void uartStartReceive(UARTDriver *uartp, size_t n, void *rxbuf) {
|
|
|
|
osalDbgCheck((uartp != NULL) && (n > 0U) && (rxbuf != NULL));
|
|
|
|
osalSysLock();
|
|
osalDbgAssert(uartp->state == UART_READY, "is active");
|
|
osalDbgAssert(uartp->rxstate != UART_RX_ACTIVE, "rx active");
|
|
|
|
uart_lld_start_receive(uartp, n, rxbuf);
|
|
uartp->rxstate = UART_RX_ACTIVE;
|
|
osalSysUnlock();
|
|
}
|
|
|
|
/**
|
|
* @brief Starts a receive operation on the UART peripheral.
|
|
* @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 has to be invoked from a lock zone.
|
|
*
|
|
* @param[in] uartp pointer to the @p UARTDriver object
|
|
* @param[in] n number of data frames to receive
|
|
* @param[out] rxbuf the pointer to the receive buffer
|
|
*
|
|
* @iclass
|
|
*/
|
|
void uartStartReceiveI(UARTDriver *uartp, size_t n, void *rxbuf) {
|
|
|
|
osalDbgCheckClassI();
|
|
osalDbgCheck((uartp != NULL) && (n > 0U) && (rxbuf != NULL));
|
|
osalDbgAssert(uartp->state == UART_READY, "is active");
|
|
osalDbgAssert(uartp->rxstate != UART_RX_ACTIVE, "rx active");
|
|
|
|
uart_lld_start_receive(uartp, n, rxbuf);
|
|
uartp->rxstate = UART_RX_ACTIVE;
|
|
}
|
|
|
|
/**
|
|
* @brief Stops any ongoing receive operation.
|
|
* @note Stopping a receive operation also suppresses the receive callbacks.
|
|
*
|
|
* @param[in] uartp pointer to the @p UARTDriver object
|
|
*
|
|
* @return The number of data frames not received by the
|
|
* stopped receive operation.
|
|
* @retval UART_ERR_NOT_ACTIVE if there was no receive operation in progress.
|
|
*
|
|
* @api
|
|
*/
|
|
size_t uartStopReceive(UARTDriver *uartp) {
|
|
size_t n;
|
|
|
|
osalDbgCheck(uartp != NULL);
|
|
|
|
osalSysLock();
|
|
osalDbgAssert(uartp->state == UART_READY, "not active");
|
|
|
|
if (uartp->rxstate == UART_RX_ACTIVE) {
|
|
n = uart_lld_stop_receive(uartp);
|
|
uartp->rxstate = UART_RX_IDLE;
|
|
}
|
|
else {
|
|
n = UART_ERR_NOT_ACTIVE;
|
|
}
|
|
osalSysUnlock();
|
|
|
|
return n;
|
|
}
|
|
|
|
/**
|
|
* @brief Stops any ongoing receive operation.
|
|
* @note Stopping a receive operation also suppresses the receive callbacks.
|
|
* @note This function has to be invoked from a lock zone.
|
|
*
|
|
* @param[in] uartp pointer to the @p UARTDriver object
|
|
*
|
|
* @return The number of data frames not received by the
|
|
* stopped receive operation.
|
|
* @retval UART_ERR_NOT_ACTIVE if there was no receive operation in progress.
|
|
*
|
|
* @iclass
|
|
*/
|
|
size_t uartStopReceiveI(UARTDriver *uartp) {
|
|
|
|
osalDbgCheckClassI();
|
|
osalDbgCheck(uartp != NULL);
|
|
osalDbgAssert(uartp->state == UART_READY, "not active");
|
|
|
|
if (uartp->rxstate == UART_RX_ACTIVE) {
|
|
size_t n = uart_lld_stop_receive(uartp);
|
|
uartp->rxstate = UART_RX_IDLE;
|
|
return n;
|
|
}
|
|
return UART_ERR_NOT_ACTIVE;
|
|
}
|
|
|
|
#if (UART_USE_WAIT == TRUE) || defined(__DOXYGEN__)
|
|
/**
|
|
* @brief Performs a transmission on the UART peripheral.
|
|
* @note The function returns when the specified number of frames have been
|
|
* sent to the UART 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 uartSendTimeout(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 = 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 */
|
|
|
|
/** @} */
|