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FPGA-Research-Manchester / FABulous

Fabric generator and CAD tools
https://fabulous.readthedocs.io/en/latest/
Apache License 2.0
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nextpnr error #118

Open anudeepdharavathu opened 11 months ago

anudeepdharavathu commented 11 months ago

After running the command, FAB_ROOT=.. nextpnr-generic --uarch fabulous --json test_design/${DESIGN}.json -o fasm=test_design/${DESIGN}_des.fasm

I see an error ERROR: Max frequency for clock 'clk': 6.29 MHz (FAIL at 12.00 MHz)

I am unable to find where the clock constraint of 12 MHz is set. I would like to relax it. Can someone help?

IAmMarcelJung commented 10 months ago

Try to use the "nextnpnr-generic" option "--freq". For more info and options run "nextpnr-generic -h".