SignalTap problem.

EEren · ‎03-19-2020

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?

ShafiqY_Intel · ‎03-20-2020

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 · ‎03-25-2020

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 · ‎04-10-2020

Hi EEren,

Have you able to solve this CFG_DONE pin issue?

Any solution you can share to community here?

Thanks

EEren · ‎04-10-2020

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