TMS570LS1224: MIBSPI Chip select timing

For large delay, you need to transmit data word by word instead of a block of data. 

How to transmit word by word ? 

Please tell me the steps that i need to follow. I am a beginner with TI MCU. 

Hi Sakthi,

This is the SPI TX function which is used to transmit a block of data:

int32 spiTransmitData(spiBASE_t *spi, spiDAT1_t *dataconfig_t, uint32 blocksize, uint16 * srcbuff)
{

  .....
}

1. you can call this function to only transmit 1 word (2bit to 16 bit), and insert a delay manually, then call this function to transmit next word:

    spiTransmitData(..., blocksize=1, ...);

    delay(

    spiTransmitData(..., blocksize=1, ...);

    ...

2. you can modify the HAL generated code: add delay to spiTransmitData(...) function:

    uint32 spiTransmitData(spiBASE_t *spi, spiDAT1_t *dataconfig_t, uint32 blocksize, uint16 * srcbuff)

    {

volatile uint32 SpiBuf;
uint16 Tx_Data;
uint32 Chip_Select_Hold = (dataconfig_t->CS_HOLD) ? 0x10000000U : 0U;
uint32 WDelay = (dataconfig_t->WDEL) ? 0x04000000U : 0U;
SPIDATAFMT_t DataFormat = dataconfig_t->DFSEL;
uint8 ChipSelect = dataconfig_t->CSNR;

/* USER CODE BEGIN (10) */
/* USER CODE END */
while(blocksize != 0U)
{

if((spi->FLG & 0x000000FFU) !=0U)
{
   break;
}

if(blocksize == 1U)
{
   Chip_Select_Hold = 0U;
}
/*SAFETYMCUSW 45 D MR:21.1 <APPROVED> "Valid non NULL input parameters are only allowed in this driver" */
Tx_Data = *srcbuff;

spi->DAT1 = ((uint32)DataFormat << 24U) |
((uint32)ChipSelect << 16U) |
(WDelay) |
(Chip_Select_Hold) |
(uint32)Tx_Data;

/*SAFETYMCUSW 567 S MR:17.1,17.4 <APPROVED> "Pointer increment needed" */
srcbuff++;
/*SAFETYMCUSW 28 D MR:NA <APPROVED> "Hardware status bit read check" */
while((spi->FLG & 0x00000100U) != 0x00000100U)
{
} /* Wait */
SpiBuf = spi->BUF;

blocksize--;

         delay();
}

/* USER CODE BEGIN (11) */
/* USER CODE END */

return (spi->FLG & 0xFFU);

}

BTW, don't enable the CSHOLD.