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ADS8329, No output using SPI

Toby Jacob
Prodigy 125 points
Other Parts Discussed in Thread: ADS8329, TMS320C6657

Hello,

I am having trouble reading data from ADS8329 using the SPI protocol. The DSP I am using is TMS320C6657. 

I have connected SDO, SDI, CS, SCLK to the DSP board. My VA and Vref is 3.3V, VBD is 3V, Input signal is 100kHz, 1Vpp.

My SPI program sends the default mode cmd (0xF), and send another cmd (0xD) to read the data from SDO according to the datasheet.

I don't know if my problem is my SPI program or my physical hardware connections. I have set the GND pins to the same GND. 

Thanks