/*
    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_sio_lld.c
 * @brief   PLATFORM SIO subsystem low level driver source.
 *
 * @addtogroup SIO
 * @{
 */

#include "hal.h"

#if (HAL_USE_SIO == TRUE) || defined(__DOXYGEN__)

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

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

/**
 * @brief   SIO1 driver identifier.
 */
#if (PLATFORM_SIO_USE_SIO1 == TRUE) || defined(__DOXYGEN__)
SIODriver SIOD1;
#endif

/*===========================================================================*/
/* Driver local variables and types.                                         */
/*===========================================================================*/

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

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

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

/**
 * @brief   Low level SIO driver initialization.
 *
 * @notapi
 */
void sio_lld_init(void) {

#if PLATFORM_SIO_USE_SIO1 == TRUE
  /* Driver initialization.*/
  sioObjectInit(&SIOD1);
#endif
}

/**
 * @brief   Configures and activates the SIO peripheral.
 *
 * @param[in] siop      pointer to the @p SIODriver object
 *
 * @notapi
 */
void sio_lld_start(SIODriver *siop) {

  if (siop->state == SIO_STOP) {
    /* Enables the peripheral.*/
#if PLATFORM_SIO_USE_SIO1 == TRUE
    if (&SIOD1 == siop) {

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

}

/**
 * @brief   Deactivates the SIO peripheral.
 *
 * @param[in] siop      pointer to the @p SIODriver object
 *
 * @notapi
 */
void sio_lld_stop(SIODriver *siop) {

  if (siop->state == SIO_READY) {
    /* Resets the peripheral.*/

    /* Disables the peripheral.*/
#if PLATFORM_SIO_USE_SIO1 == TRUE
    if (&SIOD1 == siop) {

    }
#endif
  }
}


/**
 * @brief   Reads data from the RX FIFO.
 * @details This function is non-blocking, data is read if present and the
 *          effective amount is returned.
 * @note    This function can be called from any context but it is meant to
 *          be called from the @p rxne_cb callback handler.
 *
 * @param[in] siop      pointer to the @p SIODriver object
 * @param[in] buffer    buffer for the received data
 * @param[in] size      maximum number of bytes to read
 * @return              The number of received bytes.
 *
 * @notapi
 */
size_t sio_lld_read(SIODriver *siop, uint8_t *buffer, size_t size) {

  (void)siop;
  (void)buffer;
  (void)size;

  return (size_t)0;
}

/**
 * @brief   Writes data into the TX FIFO.
 * @details This function is non-blocking, data is written if there is space
 *          in the FIFO and the effective amount is returned.
 * @note    This function can be called from any context but it is meant to
 *          be called from the @p rxne_cb callback handler.
 *
 * @param[in] siop      pointer to the @p SIODriver object
 * @param[out] buffer   buffer containing the data to be transmitted
 * @param[in] size      maximum number of bytes to read
 * @return              The number of transmitted bytes.
 *
 * @notapi
 */
size_t sio_lld_write(SIODriver *siop, const uint8_t *buffer, size_t size) {

  (void)siop;
  (void)buffer;
  (void)size;

  return (size_t)0;
}

/**
 * @brief   Control operation on a serial port.
 *
 * @param[in] siop      pointer to the @p SIODriver object
 * @param[in] operation control operation code
 * @param[in,out] arg   operation argument
 *
 * @return              The control operation status.
 * @retval MSG_OK       in case of success.
 * @retval MSG_TIMEOUT  in case of operation timeout.
 * @retval MSG_RESET    in case of operation reset.
 *
 * @notapi
 */
msg_t sio_lld_control(SIODriver *siop, unsigned int operation, void *arg) {

  (void)siop;
  (void)operation;
  (void)arg;

  return MSG_OK;
}

#endif /* HAL_USE_SIO == TRUE */

/** @} */