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KLohr's avatar
KLohr
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

I'm having problems using signalTap with virtual jtag.

I've ported a design using the virtual jtag IP which creates a virtual Uart on a max 10 device. I've done simpler designs that work with signaltap, but this one doesn't. As soon as I enable communica...
KLohr's avatar
KLohr
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

Well, I figured it out this morning. It's the device_lock -timeout 10000 command at the beginning of the tcl script. I copied that from the virtual jtag uart tcl script and it should only be at the beginning of any virtual_ir_shift/dr_shift pair and there should always be a device_unlock after that pair. The jtag uart tcl script had it at the beginning of the program and one at the end which locked out any other jtag access (including signal tap).