192 lines
5.3 KiB
C
192 lines
5.3 KiB
C
/*
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ChibiOS - Copyright (C) 2006..2016 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 uart_lld.c
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* @brief PLATFORM UART subsystem low level driver source.
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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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* @brief UART1 driver identifier.
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*/
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#if (PLATFORM_UART_USE_UART1 == TRUE) || defined(__DOXYGEN__)
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UARTDriver UARTD1;
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#endif
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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 interrupt handlers. */
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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 Low level UART driver initialization.
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*
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* @notapi
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*/
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void uart_lld_init(void) {
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#if PLATFORM_UART_USE_UART1 == TRUE
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/* Driver initialization.*/
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uartObjectInit(&UARTD1);
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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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*
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* @notapi
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*/
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void uart_lld_start(UARTDriver *uartp) {
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if (uartp->state == UART_STOP) {
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/* Enables the peripheral.*/
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#if PLATFORM_UART_USE_UART1 == TRUE
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if (&UARTD1 == uartp) {
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}
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#endif
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}
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/* Configures the peripheral.*/
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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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* @notapi
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*/
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void uart_lld_stop(UARTDriver *uartp) {
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if (uartp->state == UART_READY) {
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/* Resets the peripheral.*/
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/* Disables the peripheral.*/
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#if PLATFORM_UART_USE_UART1 == TRUE
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if (&UARTD1 == uartp) {
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}
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#endif
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}
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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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* @notapi
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*/
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void uart_lld_start_send(UARTDriver *uartp, size_t n, const void *txbuf) {
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(void)uartp;
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(void)n;
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(void)txbuf;
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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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*
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* @notapi
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*/
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size_t uart_lld_stop_send(UARTDriver *uartp) {
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(void)uartp;
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return 0;
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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 send
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* @param[out] rxbuf the pointer to the receive buffer
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*
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* @notapi
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*/
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void uart_lld_start_receive(UARTDriver *uartp, size_t n, void *rxbuf) {
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(void)uartp;
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(void)n;
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(void)rxbuf;
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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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*
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* @notapi
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*/
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size_t uart_lld_stop_receive(UARTDriver *uartp) {
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(void)uartp;
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return 0;
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}
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#endif /* HAL_USE_UART == TRUE */
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/** @} */
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