TMS320F28386D: SPI CS

W Z,

W Z said:

Another question: I am sending 0X18 0X01 0X01 data, but always that show the first TX byes is 0x00?

Your SPI is configured with SPI character length = 16 bits and not 8 bits. If your SPI_setConfig select 8-bit word size instead of 16.

W Z said:

One question: SPI CS I had set it as GPIO, but  TX every 16bits, it set to high automaticlly?

If you are doing byte by byte transaction in non-FIFO mode, I would encourage you to use SPI_transmitByte(base, txData) 

you can change your code like this.

setCS(LOW);

    SPI_transmitByte(SSI_BASE_ADDR, 0x18) ;

    SPI_transmitByte(SSI_BASE_ADDR, 0x01) ;

    SPI_transmitByte(SSI_BASE_ADDR, 0x01) ;

setCS(HIGH);

Regards,

Manoj