#include "Spi.h"
#include "deca_device_api.h"




void Spi_ChangePrescaler(uint16_t scaling_factor)
{
    uint16_t tmpreg = 0;

    /* Get the SPIx CR1 value */
    tmpreg = SPIx->CR1;

    /*clear the scaling bits*/
    tmpreg &= 0xFFC7;

    /*set the scaling bits*/
    tmpreg |= scaling_factor;

    /* Write to SPIx CR1 */
    SPIx->CR1 = tmpreg;
}

/*! ------------------------------------------------------------------------------------------------------------------
 * 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 tt;
int writetospi
(
    uint16_t       headerLength,
     uint8_t *headerBuffer,
    uint32_t       bodylength,
     uint8_t *bodyBuffer
)
{

    int i = 0;

    decaIrqStatus_t  stat ;

//    stat = decamutexon() ;

    SPIx_CS_GPIO->BRR = SPIx_CS;
//	delay_ms(1);
//	tt=HAL_SPI_Transmit(&hspi1,headerBuffer,headerLength,10);
//	tt=HAL_SPI_Transmit(&hspi1,bodyBuffer,bodylength,10);
//		delay_ms(1);
    for(i = 0; i < headerLength; i++)
    {
				SPIx->DR= headerBuffer[i];
        while ((SPIx->SR & SPI_FLAG_RXNE) == (uint16_t)RESET);				
        SPIx->DR;

    }

    for(i = 0; i < bodylength; i++)
    {
        SPIx->DR = bodyBuffer[i];
			  while ((SPIx->SR & SPI_FLAG_RXNE) == (uint16_t)RESET);		
        SPIx->DR ;
    }

    SPIx_CS_GPIO->BSRR = SPIx_CS;

  //  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_t       headerLength,
     uint8_t *headerBuffer,
    uint32_t       readlength,
    uint8_t       *readBuffer
)
{

    int i = 0;

    decaIrqStatus_t  stat ;

   // stat = decamutexon() ;

    /* Wait for SPIx Tx buffer empty */
    //while (port_SPIx_busy_sending());

    SPIx_CS_GPIO->BRR = SPIx_CS;
//	HAL_SPI_Transmit(&hspi1,headerBuffer,headerLength,10);
//	HAL_SPI_Receive(&hspi1,readBuffer,readlength,10);
    for(i = 0; i < headerLength; i++)
    {
        SPIx->DR = headerBuffer[i];

        while((SPIx->SR & SPI_FLAG_RXNE) == (uint16_t)RESET);

        readBuffer[0] = SPIx->DR ; // Dummy read as we write the header
    }

    for(i = 0; i < readlength; i++)
    {
        SPIx->DR = 0;  // Dummy write as we read the message body

        while((SPIx->SR & SPI_FLAG_RXNE) == (uint16_t)RESET);

        readBuffer[i] = SPIx->DR ;//port_SPIx_receive_data(); //this clears RXNE bit
    }

    SPIx_CS_GPIO->BSRR = SPIx_CS;

   // decamutexoff(stat) ;

    return 0;
} // end readfromspi()