Add t27c gen-xdc <profile> command that generates nextpnr-compatible XDC constraints from board profiles.\n\n- t27c gen-xdc minimal — 12 prjxray-verified pins + clock\n- t27c gen-xdc full — 16 pins (LED+UART+SPI) + clock\n- --output flag writes to file instead of stdout\n- fpga-build --profile uses shared xdc_for_profile() instead of hardcoded XDC
Add
t27c gen-xdc <profile>command that generates nextpnr-compatible XDC constraints from board profiles.\n\n-t27c gen-xdc minimal— 12 prjxray-verified pins + clock\n-t27c gen-xdc full— 16 pins (LED+UART+SPI) + clock\n---outputflag writes to file instead of stdout\n-fpga-build --profileuses sharedxdc_for_profile()instead of hardcoded XDC