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/*
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_st.c
* @brief ST Driver code.
*
* @addtogroup ST
* @{
*/
#include "hal.h"
#if (OSAL_ST_MODE != OSAL_ST_MODE_NONE) || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local types. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
#if (ST_LLD_NUM_ALARMS > 1) || defined(__DOXYGEN__)
st_callback_t st_callbacks[ST_LLD_NUM_ALARMS - 1];
#endif
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief ST Driver initialization.
* @note This function is implicitly invoked by @p halInit(), there is
* no need to explicitly initialize the driver.
*
* @init
*/
void stInit(void) {
#if ST_LLD_NUM_ALARMS > 1
unsigned i;
for (i = 0U; i < (unsigned)ST_LLD_NUM_ALARMS - 1U; i++) {
st_callbacks[i] = NULL;
}
#endif
st_lld_init();
}
#if (OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING) || defined(__DOXYGEN__)
/**
* @brief Starts the alarm zero.
* @note Makes sure that no spurious alarms are triggered after
* this call.
* @note This functionality is only available in free running mode, the
* behavior in periodic mode is undefined.
*
* @param[in] abstime the time to be set for the first alarm
*
* @api
*/
void stStartAlarm(systime_t abstime) {
osalDbgAssert(stIsAlarmActive() == false, "already active");
st_lld_start_alarm(abstime);
}
/**
* @brief Stops the alarm zero interrupt.
* @note This functionality is only available in free running mode, the
* behavior in periodic mode is undefined.
*
* @api
*/
void stStopAlarm(void) {
st_lld_stop_alarm();
}
/**
* @brief Sets the alarm zero time.
* @note This functionality is only available in free running mode, the
* behavior in periodic mode is undefined.
*
* @param[in] abstime the time to be set for the next alarm
*
* @api
*/
void stSetAlarm(systime_t abstime) {
osalDbgAssert(stIsAlarmActive() != false, "not active");
st_lld_set_alarm(abstime);
}
/**
* @brief Returns the alarm zero current time.
* @note This functionality is only available in free running mode, the
* behavior in periodic mode is undefined.
*
* @return The currently set alarm time.
*
* @api
*/
systime_t stGetAlarm(void) {
osalDbgAssert(stIsAlarmActive() != false, "not active");
return st_lld_get_alarm();
}
/**
* @brief Returns the time counter value.
* @note This functionality is only available in free running mode, the
* behaviour in periodic mode is undefined.
*
* @return The counter value.
*
* @api
*/
systime_t stGetCounter(void) {
return st_lld_get_counter();
}
/**
* @brief Determines if the alarm zero is active.
*
* @return The alarm status.
* @retval false if the alarm is not active.
* @retval true is the alarm is active
*
* @api
*/
bool stIsAlarmActive(void) {
return st_lld_is_alarm_active();
}
#if (ST_LLD_NUM_ALARMS > 1) || defined(__DOXYGEN__)
/**
* @brief Determines if the specified alarm is active.
*
* @param[in] alarm alarm channel number (1..ST_LLD_NUM_ALARMS)
* @return The alarm status.
* @retval false if the alarm is not active.
* @retval true is the alarm is active
*
* @api
*/
bool stIsAlarmActiveN(unsigned alarm) {
return st_lld_is_alarm_active_n(n);
}
/**
* @brief Starts an additional alarm.
* @note Makes sure that no spurious alarms are triggered after
* this call.
* @note This functionality is only available in free running mode, the
* behavior in periodic mode is undefined.
*
* @param[in] abstime the time to be set for the first alarm
* @param[in] alarm alarm channel number (1..ST_LLD_NUM_ALARMS)
* @param[in] cb alarm callback
*
* @api
*/
void stStartAlarmN(unsigned alarm, systime_t abstime, st_callback_t cb) {
osalDbgCheck((alarm > 0U) && (alarm < (unsigned)ST_LLD_NUM_ALARMS));
osalDbgAssert(stIsAlarmActiveN(alarm) == false, "already active");
st_callbacks[alarm - 1U] = cb;
st_lld_start_alarm_n(alarm, abstime);
}
/**
* @brief Stops an additional alarm.
* @note This functionality is only available in free running mode, the
* behavior in periodic mode is undefined.
*
* @param[in] alarm alarm channel number (1..ST_LLD_NUM_ALARMS)
*
* @api
*/
void stStopAlarmN(unsigned alarm) {
osalDbgCheck((alarm > 0U) && (alarm < (unsigned)ST_LLD_NUM_ALARMS));
st_callbacks[alarm - 1U] = NULL;
st_lld_stop_alarm_n(alarm);
}
/**
* @brief Sets an additional alarm time.
* @note This functionality is only available in free running mode, the
* behavior in periodic mode is undefined.
*
* @param[in] alarm alarm channel number (1..ST_LLD_NUM_ALARMS)
* @param[in] abstime the time to be set for the next alarm
*
* @api
*/
void stSetAlarmN(unsigned alarm, systime_t abstime) {
osalDbgCheck((alarm > 0U) && (alarm < (unsigned)ST_LLD_NUM_ALARMS));
osalDbgAssert(stIsAlarmActiveN(alarm) != false, "not active");
st_lld_set_alarm_n(alarm, abstime);
}
/**
* @brief Returns an additional alarm current time.
* @note This functionality is only available in free running mode, the
* behavior in periodic mode is undefined.
*
* @param[in] alarm alarm channel number (1..ST_LLD_NUM_ALARMS)
* @return The currently set alarm time.
*
* @api
*/
systime_t stGetAlarmN(unsigned alarm) {
osalDbgCheck((alarm > 0U) && (alarm < (unsigned)ST_LLD_NUM_ALARMS));
osalDbgAssert(stIsAlarmActiveN(alarm) != false, "not active");
return st_lld_get_alarm_n(alarm);
}
#endif /* ST_LLD_NUM_ALARMS > 1 */
#endif /* OSAL_ST_MODE == OSAL_ST_MODE_FREERUNNING */
#endif /* OSAL_ST_MODE != OSAL_ST_MODE_NONE */
/** @} */
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