This contains a simple, artificial, example of the nextpnr generic API.
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simple.py procedurally generates a simple FPGA architecture with IO at the edges, logic slices in all other tiles, and interconnect only between adjacent tiles
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simple_timing.py annotates cells with timing data (this is a separate script that must be run after packing)
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write_fasm.py uses the nextpnr Python API to write a FASM file for a design
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bitstream.py uses write_fasm.py to create a FASM ("FPGA assembly") file for the place-and-routed design
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Run simple.sh to build an example design on the FPGA above