Part Number: DK-TM4C123G

DK-TM4C123G: No data at SDout SPI interface to ADC TLV5608 & DAC TLV1570 

hi , I m currenting using STM32H7 to interface to TI ADC TLV1570 & TLV5608, I manage to get the SPI working on STM32H7 i m able to transmit and receive using the SPI , and i m able to duplicate the same command/ data waveform and captured on scope using Example 4 auto scan mode(0x0480, 0x0480, 0x0400, 0x0480), page7 of TLV1570 datasheet (pls see attached) but there was no output at SDout pin. i m varying 0~5v input at Ch0 pin only, 1 channel.  FS connect to 5v, Vref to 3.3v , AVdd and DVdd to 5v, AIN shorted to MO. Can anyone pls advise what went wrong?

main()

{

....

spi_write(0x480);

while(1)

{

   spi_write(0x0480);

   spi_read(0x0400)

....;

}