k64 spi2+dma 做从机和stm32通信，调用DSPI_MasterTransferEDMA(EXAMPLE_DSPI_MASTER_BASEADDR, &g_dspi_edma_m_handle, &masterXfer)后返回值不是kStatus_Success，是kDSPI_Busy，一直打印There is error when start DSPI_SlaveTransferEDMA，代码如下stm32这边程序是没问题的，此程序是按照库里面demo修改的，求解，谢谢，

[shengzhang]

void SPI2_Slave_Transfer(uint8_t *txdata,uint8_t *rxdata,uint8_t size)
{
dspi_transfer_t slaveXfer;

isTransferCompleted = false;

/* Set slave transfer ready to receive/send data */
slaveXfer.txData = txdata;
slaveXfer.rxData = rxdata;
slaveXfer.dataSize = size;
slaveXfer.configFlags = kDSPI_SlaveCtar0;


#if 1
/* Set up slave,DMA mode*/
if (kStatus_Success != DSPI_SlaveTransferEDMA(EXAMPLE_DSPI_SLAVE_BASEADDR, &g_dspi_edma_s_handle, &slaveXfer))
{
PRINTF("There is error when start DSPI_SlaveTransferEDMA \r\n");
}
#endif

}

[Hui_Ma]

Hi,

I would recommend customer to refer [dspi_edma_b2b_transfer_slave] demo at MCUXpresso SDK software for FRDM-K64F.

The project default path is :

..\SDK_2.3.0_FRDM-K64F\boards\frdmk64f\driver_examples\dspi\edma_b2b_transfer\slave

It needs to initialize the DMA MUX module and eDMA module before call the DSPI_SlaveTransferCreateHandleEDMA() function.

And It also need to initialize SPI slave related pins.

Wish it helps.

Have a great day,
Mike

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