I was using the SDP-H1 board with the EVAL-AD7768-4FMCZ daughter board when the LabView software appeared to hangup after the SAMPLE button was pushed (it had successfully worked several times previously). I used Windows TASK MANAGER to terminate the LabView software, pushed the reset button on the SDP-H1 board then removed the 12V power jack and unplugged the USB connection.
I re-connected the 12V supply then plugged in the USB connector. Device Manager confirmed the presence of the USB driver, but only the BF_POWER LED illuminated (previously several LEDs were on. Launching the LabView software produced a "Waiting for transfer from Controller" message to be displayed for sometime before an "Error 1172" message was displayed.
When the board was operating correctly, the FPGA_DONE LED was on. Because this LED is no longer on I assume the FPGA is not being programmed (?).
How do I get this board to work ?
I have made some voltage measurements on the SDP-H1 board to help diagnose the problem:
3V3 FPGA measures 3.308V
2V5 FPGA measures 2.499V
1V23 FPGA CORE measures 1.229V
VADJ FPGA at R179 measures 0.286V
VADJ FPGA at R180 measures 0V
1V8_DDR2_VDDO measures 0V
0.9V DDR2 measures 0V
3V3 FMC measures 0V
+5V0 at R176 measures 5.03V
These measurements made with the daughter board plugged in and powered by +9V, SDP-H1 board powered from +12v and USB connected to PC.
It sounds like the board may somehow have been damaged. Please always ensure that the SDP-H1 and EVAL-AD7768FMCZ are mated correctly during operation, I recommend screwing them together securely. Take particular care around powering down the system also. Ensure to RESET the SDP-H1 board before removing the power.
Thank you Niall. It is possible the boards became disconnected during operation as the mated boards do not sit flat on the bench as the EVAL-AD7768-4FMCZ feet are way too short. My suggestion would be too include a couple screws with EVAL-AD7768-4FMCZ, as it appears to be designed to only plug into the SDP-H1.
My follow up question is which board is most likely damaged - the SDP-H1 or the EVAL-AD7768FMCZ ?
Thank you for the feedback.
The SDP-H1 board is likely to have become damaged. You should be able to check to see that the AD7768-4 powers up successfully if it is left powered as a standalone board. There is a PWRGD signal on this board also.