RTOS/PROCESSOR-SDK-OMAPL138: SPI EDMA issue

Part Number:PROCESSOR-SDK-OMAPL138

Tool/software: TI-RTOS

Hi All,

I am trying to communicate my device with spi with Edma by configuring SPI as below but facing transaction issue. So, I started spi edma in loopback mode.

My configurations are as follows...

SPI_INSTANCE = 1

SPI_socGetInitCfg(SPI_INSTANCE, &spi_cfg);

hEdma[0] = edma3init(0, &edmaResult);
if (edmaResult != EDMA3_DRV_SOK)
{
goto err;
}

spi_cfg.edmaHandle = hEdma[0];
spi_cfg.dmaMode = true;
SPI_socSetInitCfg(SPI_INSTANCE, &spi_cfg);

SPI_Params_init(&spiParams);
spiParams.frameFormat = SPI_POL0_PHA1;

SPI_init();

hwHandle = (SPI_Handle)SPI_open(SPI_INSTANCE, &spiParams);

SPI_control(hwHandle,SPI_V0_CMD_LOOPBACK,(void *) &loop);

if (!hwHandle)
{
while(1);
}

xferEnable = 1;
SPI_control(hwHandle, SPI_V0_CMD_XFER_ACTIVATE, (void *)&xferEnable);

txBuffer = (uint8_t *)Osal_local2Global(txBuf);
RxBuffer = (uint8_t *)Osal_local2Global(rxBuf);

while(1)
{

memcpy(txBuffer, "hello\n", 6);

len = 6;

CacheP_wb((void *)RxBuffer, 128);

transaction.txBuf = (uint32_t *)txBuffer;
transaction.rxBuf = (uint8_t *) RxBuffer;
transaction.count = len;
transaction.arg = (void *)&terminateXfer;

retVal = SPI_transfer(hwHandle, &transaction);

if (retVal == false)
{
testPassed = false;
while(1);
}
CacheP_Inv((void *)RxBuffer, 128);
memset(rxBuf, 0, 4);

udelay(1000);
}

SPI_close(hwHandle);

I took mcbsp as a reference to configure spi in edma mode but couldn't make it work. 

I am receiving dma interrupt Once with rx data as 0xB5B5B5B5B5B5 after that control getting exit from the task after keeping it in while(1) also.

Can anyone help me, where I am going wrong?

Thanks,

Bhargavi Ale.