mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
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254 lines
8.2 KiB
C
Executable File
254 lines
8.2 KiB
C
Executable File
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012,2013 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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---
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A special exception to the GPL can be applied should you wish to distribute
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a combined work that includes ChibiOS/RT, without being obliged to provide
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the source code for any proprietary components. See the file exception.txt
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for full details of how and when the exception can be applied.
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*/
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/**
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* @file serial.c
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* @brief Serial Driver code.
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*
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* @addtogroup SERIAL
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* @{
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*/
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#include "ch.h"
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#include "hal.h"
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#if HAL_USE_SERIAL || 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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* Interface implementation, the following functions just invoke the equivalent
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* queue-level function or macro.
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*/
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static size_t write(void *ip, const uint8_t *bp, size_t n) {
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return chOQWriteTimeout(&((SerialDriver *)ip)->oqueue, bp,
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n, TIME_INFINITE);
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}
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static size_t read(void *ip, uint8_t *bp, size_t n) {
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return chIQReadTimeout(&((SerialDriver *)ip)->iqueue, bp,
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n, TIME_INFINITE);
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}
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static msg_t put(void *ip, uint8_t b) {
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return chOQPutTimeout(&((SerialDriver *)ip)->oqueue, b, TIME_INFINITE);
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}
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static msg_t get(void *ip) {
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return chIQGetTimeout(&((SerialDriver *)ip)->iqueue, TIME_INFINITE);
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}
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static msg_t putt(void *ip, uint8_t b, systime_t timeout) {
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return chOQPutTimeout(&((SerialDriver *)ip)->oqueue, b, timeout);
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}
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static msg_t gett(void *ip, systime_t timeout) {
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return chIQGetTimeout(&((SerialDriver *)ip)->iqueue, timeout);
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}
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static size_t writet(void *ip, const uint8_t *bp, size_t n, systime_t time) {
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return chOQWriteTimeout(&((SerialDriver *)ip)->oqueue, bp, n, time);
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}
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static size_t readt(void *ip, uint8_t *bp, size_t n, systime_t time) {
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return chIQReadTimeout(&((SerialDriver *)ip)->iqueue, bp, n, time);
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}
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static const struct SerialDriverVMT vmt = {
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write, read, put, get,
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putt, gett, writet, readt
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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 Serial 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 sdInit(void) {
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sd_lld_init();
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}
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/**
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* @brief Initializes a generic full duplex driver object.
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* @details The HW dependent part of the initialization has to be performed
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* outside, usually in the hardware initialization code.
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*
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* @param[out] sdp pointer to a @p SerialDriver structure
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* @param[in] inotify pointer to a callback function that is invoked when
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* some data is read from the Queue. The value can be
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* @p NULL.
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* @param[in] onotify pointer to a callback function that is invoked when
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* some data is written in the Queue. The value can be
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* @p NULL.
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*
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* @init
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*/
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void sdObjectInit(SerialDriver *sdp, qnotify_t inotify, qnotify_t onotify) {
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sdp->vmt = &vmt;
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chEvtInit(&sdp->event);
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sdp->state = SD_STOP;
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chIQInit(&sdp->iqueue, sdp->ib, SERIAL_BUFFERS_SIZE, inotify, sdp);
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chOQInit(&sdp->oqueue, sdp->ob, SERIAL_BUFFERS_SIZE, onotify, sdp);
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}
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/**
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* @brief Configures and starts the driver.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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* @param[in] config the architecture-dependent serial driver configuration.
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* If this parameter is set to @p NULL then a default
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* configuration is used.
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*
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* @api
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*/
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void sdStart(SerialDriver *sdp, const SerialConfig *config) {
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chDbgCheck(sdp != NULL, "sdStart");
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chSysLock();
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chDbgAssert((sdp->state == SD_STOP) || (sdp->state == SD_READY),
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"sdStart(), #1",
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"invalid state");
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sd_lld_start(sdp, config);
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sdp->state = SD_READY;
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chSysUnlock();
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}
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/**
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* @brief Stops the driver.
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* @details Any thread waiting on the driver's queues will be awakened with
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* the message @p Q_RESET.
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*
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* @param[in] sdp pointer to a @p SerialDriver object
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*
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* @api
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*/
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void sdStop(SerialDriver *sdp) {
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chDbgCheck(sdp != NULL, "sdStop");
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chSysLock();
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chDbgAssert((sdp->state == SD_STOP) || (sdp->state == SD_READY),
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"sdStop(), #1",
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"invalid state");
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sd_lld_stop(sdp);
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sdp->state = SD_STOP;
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chOQResetI(&sdp->oqueue);
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chIQResetI(&sdp->iqueue);
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chSchRescheduleS();
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chSysUnlock();
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}
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/**
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* @brief Handles incoming data.
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* @details This function must be called from the input interrupt service
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* routine in order to enqueue incoming data and generate the
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* related events.
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* @note The incoming data event is only generated when the input queue
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* becomes non-empty.
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* @note In order to gain some performance it is suggested to not use
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* this function directly but copy this code directly into the
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* interrupt service routine.
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*
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* @param[in] sdp pointer to a @p SerialDriver structure
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* @param[in] b the byte to be written in the driver's Input Queue
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*
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* @iclass
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*/
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void sdIncomingDataI(SerialDriver *sdp, uint8_t b) {
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chDbgCheckClassI();
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chDbgCheck(sdp != NULL, "sdIncomingDataI");
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if (chIQIsEmptyI(&sdp->iqueue))
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chnAddFlagsI(sdp, CHN_INPUT_AVAILABLE);
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if (chIQPutI(&sdp->iqueue, b) < Q_OK)
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chnAddFlagsI(sdp, SD_OVERRUN_ERROR);
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}
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/**
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* @brief Handles outgoing data.
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* @details Must be called from the output interrupt service routine in order
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* to get the next byte to be transmitted.
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* @note In order to gain some performance it is suggested to not use
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* this function directly but copy this code directly into the
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* interrupt service routine.
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*
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* @param[in] sdp pointer to a @p SerialDriver structure
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* @return The byte value read from the driver's output queue.
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* @retval Q_EMPTY if the queue is empty (the lower driver usually
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* disables the interrupt source when this happens).
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*
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* @iclass
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*/
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msg_t sdRequestDataI(SerialDriver *sdp) {
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msg_t b;
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chDbgCheckClassI();
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chDbgCheck(sdp != NULL, "sdRequestDataI");
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b = chOQGetI(&sdp->oqueue);
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if (b < Q_OK)
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chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY);
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return b;
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}
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#endif /* HAL_USE_SERIAL */
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/** @} */
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