/*! ----------------------------------------------------------------------------
 * @file    deca_spi.c
 * @brief   SPI access functions
 *
 * @attention
 *
 * Copyright 2013 (c) DecaWave Ltd, Dublin, Ireland.
 *
 * All rights reserved.
 *
 * @author DecaWave
 */
#include "deca_spi.h"
#include "deca_device_api.h"

/*! ------------------------------------------------------------------------------------------------------------------
 * Function: openspi()
 *
 * Low level abstract function to open and initialise access to the SPI device.
 * returns 0 for success, or -1 for error
 */
int openspi(/*SPI_TypeDef* SPIx*/)
{

    return 0;

} // end openspi()

/*! ------------------------------------------------------------------------------------------------------------------
 * Function: closespi()
 *
 * Low level abstract function to close the the SPI device.
 * returns 0 for success, or -1 for error
 */
int closespi(void)
{

    return 0;

} // end closespi()

/*! ------------------------------------------------------------------------------------------------------------------
 * Function: writetospi()
 *
 * Low level abstract function to write to the SPI
 * Takes two separate byte buffers for write header and write data
 * returns 0 for success, or -1 for error
 */

 uint8_t spi_recieve_byte(uint8_t b)
 {
   SPDR = b;
   while(!(SPSR & (1<<SPIF)));
   return SPDR;
 }

int writetospi(uint16 headerLength, const uint8 *headerBuffer, uint32 bodylength, const uint8 *bodyBuffer)
{
    decaIrqStatus_t  stat ;

    //stat = decamutexon() ;

    digitalWrite(10, LOW);

    for (uint8_t i = 0; i < headerLength; i++)
        spi_recieve_byte(headerBuffer[i]);

    for (uint8_t i = 0; i < bodylength; i++)
        spi_recieve_byte(bodyBuffer[i]);

    digitalWrite(10, HIGH);

  //decamutexoff(stat) ;

  return 0;
} // end writetospi()


/*! ------------------------------------------------------------------------------------------------------------------
 * Function: readfromspi()
 *
 * Low level abstract function to read from the SPI
 * Takes two separate byte buffers for write header and read data
 * returns the offset into read buffer where first byte of read data may be found,
 * or returns -1 if there was an error
 */
int readfromspi(uint16 headerLength, const uint8 *headerBuffer, uint32 readlength, uint8 *readBuffer)
{
    decaIrqStatus_t  stat ;

    //stat = decamutexon() ;

    digitalWrite(10, LOW);

    for (uint8_t i = 0; i < headerLength; i++)
        spi_recieve_byte(headerBuffer[i]);

    for (uint8_t i = 0; i < readlength; i++)
        readBuffer[i] = spi_recieve_byte(0);

    digitalWrite(10, HIGH);
  //decamutexoff(stat) ;

  return 0;
} // end readfromspi()