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?
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.