81 lines
2.7 KiB
Nix
81 lines
2.7 KiB
Nix
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{
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description = "FPGA flake, running verilog on ice40";
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inputs = {
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flake-utils.url = "github:numtide/flake-utils";
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};
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outputs = { self, nixpkgs, flake-utils }:
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flake-utils.lib.eachDefaultSystem (sys:
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let pkgs = nixpkgs.legacyPackages.${sys};
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verilator = import ./verilator.nix pkgs ;
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yosys = pkgs.yosys;
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vflags = ''-DSIMULATE -Wno-fatal -Wpedantic -Wwarn-lint -Wwarn-style -Wno-PINCONNECTEMPTY -Wno-BLKSEQ -CFLAGS "-Wpedantic -std=c++20"'';
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verilate-src = cmd: ''
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cp -r ${./src} ./src
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cp -r ${./simulation} ./simulation
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find ./src/ -name '*.v' -exec ${verilator}/bin/verilator ${vflags} ${cmd} {} +
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'';
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lint = pkgs.runCommand "lint" {} ''
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${verilate-src "--lint-only"}
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echo "compiler didn't get angry :3"
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: 3 > $out
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'';
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test-trace = pkgs.runCommandCC "test-trace" {} ''
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set -e
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${verilate-src "--cc --build --exe --trace -CFLAGS -DTRACE=1 ./simulation/test_led.cpp -top top"}
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mv obj_dir "$out" && mkdir "$out/bin"
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cp "$out/Vtop" "$out/bin/sim"
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$out/bin/sim $out/trace.vcd
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echo "${pkgs.gtkwave}/bin/gtkwave $out/trace.vcd" > $out/bin/test-trace
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chmod u+x $out/bin/test-trace
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'';
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synth = pkgs.runCommandCC "synth" {} ''
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mkdir -p "$out"
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find ${./src} -name '*.v' -exec ${yosys}/bin/yosys -f ' -sv' -q -p "synth_ice40 -top top -json $out/synth.json" {} +
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'';
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pnr-interactive = pkgs.writeScriptBin "pnr-interactive" ''
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${pkgs.nextpnrWithGui}/bin/nextpnr-ice40 --up5k --package sg48 --pcf ${./pins.pcf} --json ${synth}/synth.json --gui
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'';
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pnr = pkgs.runCommandCC "pnr" {} ''
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mkdir -p "$out"
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${pkgs.nextpnrWithGui}/bin/nextpnr-ice40 --up5k --package sg48 --pcf ${./pins.pcf} --json ${synth}/synth.json --asc "$out/pnr.asc" \
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--freq 50
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'';
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flash = pkgs.writeScriptBin "flash" ''
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set -e
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bin="$(mktemp)"
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${pkgs.icestorm}/bin/icepack ${pnr}/pnr.asc "$bin"
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${pkgs.icestorm}/bin/iceprog "$bin"
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'';
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deps = [
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yosys pkgs.nextpnrWithGui pkgs.icestorm verilator pkgs.gtkwave
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pkgs.picocom
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];
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in rec {
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packages.verilator = verilator;
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packages.lint = lint;
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packages.test-trace = test-trace;
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packages.synth = synth;
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packages.pnr-interactive = pnr-interactive;
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packages.pnr = pnr;
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packages.flash = flash;
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devShells.default = pkgs.mkShell { packages = deps; };
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}
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);
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}
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