build.ninja

## Project-specific settings
project = template
top = top

## board/device-specific settings
device = lp8k
package = cm81
f_in = 16

## end of user definitions

build_dir = build

rule create-build-directory
    description = Create the build directory
    command = mkdir -p $out

# run the synthese to produce a JSON output
rule synthesize
    description = Synthesize Verilog design
    command = yosys -q -p 'synth_ice40 -top $top -json $out' $in

rule place-n-route
    description = Place'n'route
    command = nextpnr-ice40 --quiet --$device --package $package --top $top --json $in --pcf constraints.pcf --asc $out

rule pack
    description = Generating the final FPGA bitstream
    command = icepack $in $out


rule gen-pll
    description = Generate PLL settings file
    command = icepll -i $f_in -o 100 -m -f $out

build $build_dir: create-build-directory
build $build_dir/pll.v: gen-pll
build $build_dir/$project.json: synthesize $top.v $build_dir/pll.v
build $build_dir/$project.asc: place-n-route $build_dir/$project.json
build $build_dir/$project.bin: pack $build_dir/$project.asc