void spi_transceive_dma(void *data_send1, void *data_recv1, uint16_t len1,
void *data_send2, void *data_recv2, uint16_t len2) {
SPI_PdcSetTx(SPI, data_send1, len1, data_send2, len2);
SPI_PdcSetRx(SPI, data_recv1, len1, data_recv2, len2);
// Enable RX and TX DMA transfer requests
SPI_PdcEnableRx(SPI);
SPI_PdcEnableTx(SPI);
}
/**
* \brief Perform SPI slave transfer using PDC.
* \param pBuf Pointer to 1st buffer to transfer.
* \param size Size of the 1st buffer.
* \param pNextBuf Pointer to 2nd buffer to transfer.
* \param nextSize Size of the 2nd buffer.
*/
static void SpiSlaveTransfer( void* pBuf, uint16_t size, void* pNextBuf, uint16_t nextSize )
{
uint32_t spiIER ;
SPI_PdcSetTx( SPI_SLAVE_BASE, pBuf, size, pNextBuf, nextSize ) ;
SPI_PdcSetRx( SPI_SLAVE_BASE, pBuf, size, pNextBuf, nextSize ) ;
/* Enable the RX and TX PDC transfer requests */
SPI_PdcEnableRx( SPI_SLAVE_BASE ) ;
SPI_PdcEnableTx( SPI_SLAVE_BASE ) ;
/* Transfer done handler is in ISR ... */
spiIER = SPI_IER_NSSR | SPI_IER_RXBUFF | (pNextBuf ? SPI_IER_ENDRX : 0) ;
SPI_EnableIt( SPI_SLAVE_BASE, spiIER ) ;
}
/**
* \brief Perform SPI master transfer using PDC.
* \param pBuf Pointer to 1st buffer to transfer.
* \param size Size of the 1st buffer.
* \param pNextBuf Pointer to 2nd buffer to transfer.
* \param nextSize Size of the 2nd buffer.
*/
static void SpiMasterTransfer( void * pBuf, uint16_t size, void * pNextBuf, uint16_t nextSize )
{
SPI_PdcSetTx(SPI_MASTER_BASE, pBuf, size, pNextBuf, nextSize);
SPI_PdcSetRx(SPI_MASTER_BASE, pBuf, size, pNextBuf, nextSize);
/* Enable the RX and TX PDC transfer requests */
SPI_PdcEnableRx(SPI_MASTER_BASE);
SPI_PdcEnableTx(SPI_MASTER_BASE);
/* Waiting transfer done*/
while((SPI_GetStatus(SPI_MASTER_BASE)& SPI_SR_RXBUFF) == 0);
/* Disable the RX and TX PDC transfer requests */
SPI_PdcDisableTx(SPI_MASTER_BASE);
SPI_PdcDisableRx(SPI_MASTER_BASE);
}
