/*
    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
                 2011,2012,2013 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/>.
*/

/**
 * @file    templates/can_lld.c
 * @brief   CAN Driver subsystem low level driver source template.
 *
 * @addtogroup CAN
 * @{
 */

#include "ch.h"
#include "hal.h"

#if HAL_USE_CAN || defined(__DOXYGEN__)

/*===========================================================================*/
/* Driver local definitions.                                                 */
/*===========================================================================*/

/*===========================================================================*/
/* Driver exported variables.                                                */
/*===========================================================================*/

/** @brief CAN1 driver identifier.*/
#if PLATFORM_CAN_USE_CAN1 || defined(__DOXYGEN__)
CANDriver CAND1;
#endif

/*===========================================================================*/
/* Driver local variables.                                                   */
/*===========================================================================*/

/*===========================================================================*/
/* Driver local functions.                                                   */
/*===========================================================================*/

/*===========================================================================*/
/* Driver interrupt handlers.                                                */
/*===========================================================================*/

/*===========================================================================*/
/* Driver exported functions.                                                */
/*===========================================================================*/

/**
 * @brief   Low level CAN driver initialization.
 *
 * @notapi
 */
void can_lld_init(void) {

#if PLATFORM_CAN_USE_CAN1
  /* Driver initialization.*/
  canObjectInit(&CAND1);
#endif /* PLATFORM_CAN_USE_CAN1 */
}

/**
 * @brief   Configures and activates the CAN peripheral.
 *
 * @param[in] canp      pointer to the @p CANDriver object
 *
 * @notapi
 */
void can_lld_start(CANDriver *canp) {

  if (canp->state == CAN_STOP) {
    /* Enables the pehipheral.*/
#if PLATFORM_CAN_USE_CAN1
    if (&CAND1 == canp) {

    }
#endif /* PLATFORM_CAN_USE_CAN1 */
  }
  /* Configures the peripheral.*/

}

/**
 * @brief   Deactivates the CAN peripheral.
 *
 * @param[in] canp      pointer to the @p CANDriver object
 *
 * @notapi
 */
void can_lld_stop(CANDriver *canp) {

  if (canp->state == CAN_READY) {
    /* Resets the peripheral.*/

    /* Disables the peripheral.*/
#if PLATFORM_CAN_USE_CAN1
    if (&CAND1 == canp) {

    }
#endif /* PLATFORM_CAN_USE_CAN1 */
  }
}

/**
 * @brief   Determines whether a frame can be transmitted.
 *
 * @param[in] canp      pointer to the @p CANDriver object
 * @param[in] mailbox   mailbox number, @p CAN_ANY_MAILBOX for any mailbox
 *
 * @return              The queue space availability.
 * @retval FALSE        no space in the transmit queue.
 * @retval TRUE         transmit slot available.
 *
 * @notapi
 */
bool_t can_lld_is_tx_empty(CANDriver *canp, canmbx_t mailbox) {

  switch (mailbox) {
  case CAN_ANY_MAILBOX:
    return FALSE;
  case 1:
    return FALSE;
  case 2:
    return FALSE;
  case 3:
    return FALSE;
  default:
    return FALSE;
  }
}

/**
 * @brief   Inserts a frame into the transmit queue.
 *
 * @param[in] canp      pointer to the @p CANDriver object
 * @param[in] ctfp      pointer to the CAN frame to be transmitted
 * @param[in] mailbox   mailbox number,  @p CAN_ANY_MAILBOX for any mailbox
 *
 * @notapi
 */
void can_lld_transmit(CANDriver *canp,
                      canmbx_t mailbox,
                      const CANTxFrame *ctfp) {

}

/**
 * @brief   Determines whether a frame has been received.
 *
 * @param[in] canp      pointer to the @p CANDriver object
 * @param[in] mailbox   mailbox number, @p CAN_ANY_MAILBOX for any mailbox
 *
 * @return              The queue space availability.
 * @retval FALSE        no space in the transmit queue.
 * @retval TRUE         transmit slot available.
 *
 * @notapi
 */
bool_t can_lld_is_rx_nonempty(CANDriver *canp, canmbx_t mailbox) {

  switch (mailbox) {
  case CAN_ANY_MAILBOX:
    return FALSE
  case 1:
    return FALSE
  case 2:
    return FALSE
  default:
    return FALSE;
  }
}

/**
 * @brief   Receives a frame from the input queue.
 *
 * @param[in] canp      pointer to the @p CANDriver object
 * @param[in] mailbox   mailbox number, @p CAN_ANY_MAILBOX for any mailbox
 * @param[out] crfp     pointer to the buffer where the CAN frame is copied
 *
 * @notapi
 */
void can_lld_receive(CANDriver *canp,
                     canmbx_t mailbox,
                     CANRxFrame *crfp) {

}

#if CAN_USE_SLEEP_MODE || defined(__DOXYGEN__)
/**
 * @brief   Enters the sleep mode.
 *
 * @param[in] canp      pointer to the @p CANDriver object
 *
 * @notapi
 */
void can_lld_sleep(CANDriver *canp) {

}

/**
 * @brief   Enforces leaving the sleep mode.
 *
 * @param[in] canp      pointer to the @p CANDriver object
 *
 * @notapi
 */
void can_lld_wakeup(CANDriver *canp) {

}
#endif /* CAN_USE_SLEEP_MODE */

#endif /* HAL_USE_CAN */

/** @} */