void EXAMPLE_MasterStartDMATransfer(void)
{
uint32_t i = 0U;
dma_transfer_config_t masterTxDmaConfig, masterRxDmaConfig;
/* Prepare buffer to send and receive data. */
for (i = 0U; i < BUFFER_SIZE; i++)
{
txBuffer[i] = i;
rxBuffer[i] = 0U;
}
/* Prepare and start DMA RX transfer. */
DMA_PrepareTransfer(&masterRxDmaConfig, (void *)&EXAMPLE_SPI_MASTER->RXDAT, rxBuffer, sizeof(uint8_t), BUFFER_SIZE,
kDMA_PeripheralToMemory, NULL);
DMA_SubmitTransfer(&masterRxHandle, &masterRxDmaConfig);
/* Start DMA TX transfer. */
DMA_StartTransfer(&masterRxHandle);
/* Set the last byte to be sent, This will de-assert the SSEL pin when transmission is completed.
* If users want to assert the SSEL pin when transmission is completed, there is no need to set up this descriptor.
*/
lastData = txBuffer[BUFFER_SIZE - 1] | kSPI_EndOfTransfer | (EXAMPLE_SPI_MASTER->TXCTL & 0xFFFF0000);
/* DMA transfer configuration setting. */
dma_xfercfg_t tmp_xfercfg = {0};
tmp_xfercfg.valid = true;
tmp_xfercfg.swtrig = true;
tmp_xfercfg.intA = true;
tmp_xfercfg.byteWidth = sizeof(uint32_t);
tmp_xfercfg.srcInc = 0;
tmp_xfercfg.dstInc = 0;
tmp_xfercfg.transferCount = 1;
/* Create chained descriptor to transmit last word */
DMA_CreateDescriptor(&txDescriptor, &tmp_xfercfg, &lastData, (void *)&EXAMPLE_SPI_MASTER->TXDATCTL, NULL);
/* Add confifuration parameter to descriptor. */
DMA_PrepareTransfer(&masterTxDmaConfig, txBuffer, (void *)&EXAMPLE_SPI_MASTER->TXDAT, sizeof(uint8_t),
BUFFER_SIZE - 1, kDMA_MemoryToPeripheral, &txDescriptor);
/* Disable interrupts for first descriptor to avoid calling callback twice. */
masterTxDmaConfig.xfercfg.intA = false;
masterTxDmaConfig.xfercfg.intB = false;
DMA_SubmitTransfer(&masterTxHandle, &masterTxDmaConfig);
/* Start DMA TX transfer. */
DMA_StartTransfer(&masterTxHandle);
}
How can I modify this function? Or add other configurations? Thank you.
