icu.c
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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
---
A special exception to the GPL can be applied should you wish to distribute
a combined work that includes ChibiOS/RT, without being obliged to provide
the source code for any proprietary components. See the file exception.txt
for full details of how and when the exception can be applied.
*/
/**
* @file icu.c
* @brief ICU Driver code.
*
* @addtogroup ICU
* @{
*/
#include "ch.h"
#include "hal.h"
#if HAL_USE_ICU || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief ICU Driver initialization.
* @note This function is implicitly invoked by @p halInit(), there is
* no need to explicitly initialize the driver.
*
* @init
*/
void icuInit(void) {
icu_lld_init();
}
/**
* @brief Initializes the standard part of a @p ICUDriver structure.
*
* @param[out] icup pointer to the @p ICUDriver object
*
* @init
*/
void icuObjectInit(ICUDriver *icup) {
icup->state = ICU_STOP;
icup->config = NULL;
}
/**
* @brief Configures and activates the ICU peripheral.
*
* @param[in] icup pointer to the @p ICUDriver object
* @param[in] config pointer to the @p ICUConfig object
*
* @api
*/
void icuStart(ICUDriver *icup, const ICUConfig *config) {
chDbgCheck((icup != NULL) && (config != NULL), "icuStart");
chSysLock();
chDbgAssert((icup->state == ICU_STOP) || (icup->state == ICU_READY),
"icuStart(), #1", "invalid state");
icup->config = config;
icu_lld_start(icup);
icup->state = ICU_READY;
chSysUnlock();
}
/**
* @brief Deactivates the ICU peripheral.
*
* @param[in] icup pointer to the @p ICUDriver object
*
* @api
*/
void icuStop(ICUDriver *icup) {
chDbgCheck(icup != NULL, "icuStop");
chSysLock();
chDbgAssert((icup->state == ICU_STOP) || (icup->state == ICU_READY),
"icuStop(), #1", "invalid state");
icu_lld_stop(icup);
icup->state = ICU_STOP;
chSysUnlock();
}
/**
* @brief Enables the input capture.
*
* @param[in] icup pointer to the @p ICUDriver object
*
* @api
*/
void icuEnable(ICUDriver *icup) {
chDbgCheck(icup != NULL, "icuEnable");
chSysLock();
chDbgAssert(icup->state == ICU_READY, "icuEnable(), #1", "invalid state");
icu_lld_enable(icup);
icup->state = ICU_WAITING;
chSysUnlock();
}
/**
* @brief Disables the input capture.
*
* @param[in] icup pointer to the @p ICUDriver object
*
* @api
*/
void icuDisable(ICUDriver *icup) {
chDbgCheck(icup != NULL, "icuDisable");
chSysLock();
chDbgAssert((icup->state == ICU_READY) || (icup->state == ICU_WAITING) ||
(icup->state == ICU_ACTIVE) || (icup->state == ICU_IDLE),
"icuDisable(), #1", "invalid state");
icu_lld_disable(icup);
icup->state = ICU_READY;
chSysUnlock();
}
#endif /* HAL_USE_ICU */
/** @} */