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Vivado Hardware manager does not detect any devices on the UltraZed-EG SOM board

eran99

I'm connected to the Avnet UltraZed-EG SOM board using DLC10 USB-JTAG

adopter.
when I click on open-target and then auto-connect, the DLC10 is detected, and the UltraZed-EG is detected - I know that since it says:

Xilinx_tcf/Xilinx/00001877ae8201(0) "open", but if I unplug the jtag connector is says "closed".

However, it says Device Count 0 under properties, and I'm getting a message " No devices detected on target"

 

I set all 4 DIP switches to ON, which is 0000 for JTAG boot mode.

 

Is there any other setting or jumpers I need to deal with on the UltraZed board, or perhaps it's a driver issue?

 

Eran

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    I found that there’s a problem with a reset signal on the JTAG connector (Pin 14) that resets the FPGA once I connect the JTAG cable so that’s definitely a problem that would cause the FPGA to not be found. Hopefully that's the only issue.

    Given that, the question now comes to: Is there away to configure the DLC10 to block/disconnect pin14?

     

    Eran

  • 0 in reply to eran99

    I am not aware of any way to affect the behavior of pin14 of the DLC10 JTAG ribbon cable.  Maybe it will work better to connect the JTAG cable to the board (and the DLC10 JTAG pod to the PC) before powering the board and before opening your project in Vivado?  I believe that is what has worked best for me in the past.  An alternative to the DLC10 JTAG pod that may behave differently, and is definitely faster, is the Digilent HS3 JTAG ModuleDigilent HS3 JTAG Module.

    --Tom

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