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EEren's avatar
EEren
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

SignalTap problem.

FPGA (MAX10) connected to a microcontroller board. If I disconnect the board SignalTap runs good. If I connect the board back - SignalTap starts and immediately writes - Invalid JTAG configuration.

Obviously the microcontroller board affects a SignalTap work.

I checked with a scope all JTAG pins and all configuration pins during SignalTap run - seems all good, no spikes, no problems on pins .

What can cause the problem?

4 Replies

  • ShafiqY_Intel's avatar
    ShafiqY_Intel
    Icon for Frequent Contributor rankFrequent Contributor
    5 years ago

    Hi EEren,

    Can you try jtagconfig command when Max 10 connected to microcontroller board?

    (open Command Prompt ---> go to Quartus directory <Quartus installation directory>intelFPGA\18.1\quartus\bin64> ---> run jtagconfig)

    Please send me he screenshot of the result.

    Thanks

  • EEren's avatar
    EEren
    Icon for Occasional Contributor rankOccasional Contributor
    5 years ago

    The problem was CFG_DONE pin. It was connected to CPU pin configured as output. I don't know why but this pin affects Signal Tap flow.

    • ShafiqY_Intel's avatar
      ShafiqY_Intel
      Icon for Frequent Contributor rankFrequent Contributor
      5 years ago

      Hi EEren,

      Have you able to solve this CFG_DONE pin issue?

      Any solution you can share to community here?

      Thanks

      • EEren's avatar
        EEren
        Icon for Occasional Contributor rankOccasional Contributor
        5 years ago

        I just configured this pin as input on the CPU side.