168 lines
5.0 KiB
C
168 lines
5.0 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011 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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/**
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* @file ext.c
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* @brief EXT Driver code.
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*
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* @addtogroup EXT
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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_EXT || 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. */
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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 EXT 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 extInit(void) {
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ext_lld_init();
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}
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/**
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* @brief Initializes the standard part of a @p EXTDriver structure.
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*
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* @param[out] extp pointer to the @p EXTDriver object
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*
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* @init
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*/
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void extObjectInit(EXTDriver *extp) {
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extp->state = EXT_STOP;
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extp->config = NULL;
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}
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/**
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* @brief Configures and activates the EXT peripheral.
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* @post After activation all EXT channels are in the disabled state,
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* use @p extChannelEnable() in order to activate them.
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*
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* @param[in] extp pointer to the @p EXTDriver object
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* @param[in] config pointer to the @p EXTConfig object
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*
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* @api
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*/
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void extStart(EXTDriver *extp, const EXTConfig *config) {
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chDbgCheck((extp != NULL) && (config != NULL), "extStart");
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chSysLock();
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chDbgAssert((extp->state == EXT_STOP) || (extp->state == EXT_ACTIVE),
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"extStart(), #1", "invalid state");
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extp->config = config;
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ext_lld_start(extp);
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extp->state = EXT_ACTIVE;
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chSysUnlock();
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}
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/**
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* @brief Deactivates the EXT peripheral.
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*
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* @param[in] extp pointer to the @p EXTDriver object
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*
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* @api
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*/
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void extStop(EXTDriver *extp) {
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chDbgCheck(extp != NULL, "extStop");
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chSysLock();
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chDbgAssert((extp->state == EXT_STOP) || (extp->state == EXT_ACTIVE),
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"extStop(), #1", "invalid state");
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ext_lld_stop(extp);
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extp->state = EXT_STOP;
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chSysUnlock();
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}
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/**
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* @brief Enables an EXT channel.
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*
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* @param[in] extp pointer to the @p EXTDriver object
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* @param[in] channel channel to be enabled
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*
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* @api
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*/
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void extChannelEnable(EXTDriver *extp, expchannel_t channel) {
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chDbgCheck((extp != NULL) &&
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(channel < EXT_MAX_CHANNELS) &&
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(extp->config->channels[channel].mode != EXT_CH_MODE_DISABLED),
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"extChannelEnable");
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chSysLock();
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chDbgAssert(extp->state == EXT_ACTIVE,
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"extChannelEnable(), #1", "invalid state");
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extChannelEnableI(extp, channel);
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chSysUnlock();
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}
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/**
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* @brief Disables an EXT channel.
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*
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* @param[in] extp pointer to the @p EXTDriver object
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* @param[in] channel channel to be disabled
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*
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* @api
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*/
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void extChannelDisable(EXTDriver *extp, expchannel_t channel) {
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chDbgCheck((extp != NULL) &&
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(channel < EXT_MAX_CHANNELS) &&
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(extp->config->channels[channel].mode != EXT_CH_MODE_DISABLED),
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"extChannelDisable");
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chSysLock();
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chDbgAssert(extp->state == EXT_ACTIVE,
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"extChannelDisable(), #1", "invalid state");
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extChannelDisableI(extp, channel);
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chSysUnlock();
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}
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#endif /* HAL_USE_EXT */
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/** @} */
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