/*
    ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio.

    This file is part of ChibiOS.

    ChibiOS 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 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/>.
*/

/**
 * @file    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.                                                   */
/*===========================================================================*/

/*===========================================================================*/
/* 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) {

  st_lld_init();
}


/**
 * @brief   Starts the 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
 *
 * @api
 */
void stStartAlarm(systime_t abstime) {

  osalDbgAssert(stIsAlarmActive() == false, "already active");

  st_lld_start_alarm(abstime);
}

/**
 * @brief   Stops the alarm 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 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 current alarm 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();
}

#endif /* OSAL_ST_MODE != OSAL_ST_MODE_NONE */

/** @} */