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@@ -1,2 +1,44 @@ # ghdlsynth-beta VHDL synthesis (based on ghdl) + +This is awfully experimental and work in progress! + +## How to build + +FIXME: should provide an easy way to build as a module! + +Get ghdl from github, +build and install +build and install libghdlsynth.a: +```sh +$ make libghdlsynth.a +$ make install.libghdlsynth +``` + +Get yosys. + +From ghdlsynth-beta: +Patch yosys sources using yosys.diff +Copy the ghdl/ directory in yosys/frontends + +Configure yosys. +In Makefile.conf, add: +```makefile +ENABLE_GHDL := 1 +GHDL_DIR := <ghdl install dir> +``` + +Build yosys. + +## How to use + +Example for icestick: + +```sh +ghdl -a leds.vhdl +ghdl -a spin1.vhdl +yosys -p 'ghdl leds; synth_ice40 -blif leds.blif' +arachne-pnr -d 1k -o leds.asc -p leds.pcf leds.blif +icepack leds.asc leds.bin +ceprog leds.bin +``` |