Hello Kanimozhi Raju,
I have test the SPI in the KSDK sample code, it can send out the data what you want.
I find your main code is:
void main (void)
{
printf("\n SPI Interface with afe \n");
spi_init();
while(1)
{
spi_write(0x00,0x000000);
spi_write(0x20,0x000004);
spi_write(0x00,0x000001);
spi_read(0x20);
}
}
So, I have wrote this code in the KSDK
int main(void)
{
BOARD_InitPins();
BOARD_BootClockRUN();
BOARD_InitDebugConsole();
uint32_t srcClock_Hz;
uint32_t errorCount;
uint32_t i;
dspi_master_config_t masterConfig;
dspi_slave_config_t slaveConfig;
dspi_transfer_t masterXfer;
/* Master config */
masterConfig.whichCtar = kDSPI_Ctar0;
masterConfig.ctarConfig.baudRate = TRANSFER_BAUDRATE;
masterConfig.ctarConfig.bitsPerFrame = 8U;
masterConfig.ctarConfig.cpol = kDSPI_ClockPolarityActiveHigh;
masterConfig.ctarConfig.cpha = kDSPI_ClockPhaseFirstEdge;
masterConfig.ctarConfig.direction = kDSPI_MsbFirst;
masterConfig.ctarConfig.pcsToSckDelayInNanoSec = 1000000000U / TRANSFER_BAUDRATE;
masterConfig.ctarConfig.lastSckToPcsDelayInNanoSec = 1000000000U / TRANSFER_BAUDRATE;
masterConfig.ctarConfig.betweenTransferDelayInNanoSec = 1000000000U / TRANSFER_BAUDRATE;
masterConfig.whichPcs = EXAMPLE_DSPI_MASTER_PCS_FOR_INIT;
masterConfig.pcsActiveHighOrLow = kDSPI_PcsActiveLow;
masterConfig.enableContinuousSCK = false;
masterConfig.enableRxFifoOverWrite = false;
masterConfig.enableModifiedTimingFormat = false;
masterConfig.samplePoint = kDSPI_SckToSin0Clock;
srcClock_Hz = DSPI_MASTER_CLK_FREQ;
DSPI_MasterInit(EXAMPLE_DSPI_MASTER_BASEADDR, &masterConfig, srcClock_Hz);
/* Set up the transfer data */
for (i = 0U; i < TRANSFER_SIZE; i++)
{
masterTxData[i] = i % 256U;
masterRxData[i] = 0U;
}
masterTxData[0] = 0X00;
masterTxData[1] = 0X00;
masterTxData[2] = 0X00;
masterTxData[3] = 0X00;
/* Start master transfer */
masterXfer.txData = masterTxData;
masterXfer.rxData = masterRxData;
masterXfer.dataSize = 4;
masterXfer.configFlags = kDSPI_MasterCtar0 | EXAMPLE_DSPI_MASTER_PCS_FOR_TRANSFER | kDSPI_MasterPcsContinuous;
DSPI_MasterTransferBlocking(EXAMPLE_DSPI_MASTER_BASEADDR, &masterXfer);
masterTxData[0] = 0X20;
masterTxData[1] = 0X00;
masterTxData[2] = 0X00;
masterTxData[3] = 0X04;
/* Start master transfer */
masterXfer.txData = masterTxData;
masterXfer.rxData = masterRxData;
masterXfer.dataSize = 4;
masterXfer.configFlags = kDSPI_MasterCtar0 | EXAMPLE_DSPI_MASTER_PCS_FOR_TRANSFER | kDSPI_MasterPcsContinuous;
DSPI_MasterTransferBlocking(EXAMPLE_DSPI_MASTER_BASEADDR, &masterXfer);
masterTxData[0] = 0X00;
masterTxData[1] = 0X00;
masterTxData[2] = 0X00;
masterTxData[3] = 0X01;
/* Start master transfer */
masterXfer.txData = masterTxData;
masterXfer.rxData = masterRxData;
masterXfer.dataSize = 4;
masterXfer.configFlags = kDSPI_MasterCtar0 | EXAMPLE_DSPI_MASTER_PCS_FOR_TRANSFER | kDSPI_MasterPcsContinuous;
DSPI_MasterTransferBlocking(EXAMPLE_DSPI_MASTER_BASEADDR, &masterXfer);
while (1)
{
}
}
The test spi wave is:
Because I didn't add the slave, then the MISO wire have no data, but the MOSI data is correct.
More details, please refer to my attached project which is based on KSDK2.2.
Wish it helps you!
Have a great day,
Kerry
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Unless your SPI device is 'very unusual' (and it is NOT) remove SCKE from line 74. Optimizing the timing so CS just hits 'exactly 32 clocks' from within a continuous stream is 'more trouble than you need'.
You have no PCS value in lines 292 and 353. The Chip-select pattern MUST remain thru the whole four bytes (A/D3/D2/D1). I would expect you only need PCS0 (per line 60), so '1' for all PCS fields (lines 260/271/281/292/313/326/339/353). This code also still has '|=' for all SR writes, please replace with just '=' !!!
AFE4490:
