We are developing the program of the FPGA for the SPI control and data acquisition with the evaluation board of AD converter AD9681, which is connected with the evaluation board of Zynq UltraScale+MPSoC ZCU102 with FMC connector.
We can detect the SDIO, SCLK and CSB at the FMC connector by controlling the FPGA, but we cannot detect these signals at the P1 connector onboard the AD9681 after the connection with the FPGA, which shows zero voltage.
Is there a possibility the FPGA fails in getting the ID information from EEPROM onboard the AD9681 to decide the voltages ?
We would be grateful if you could give us some information on the driver program for the SPI of AD9681.
Thank you in advance.