ck-snes#

I'm trying to write an SNES emulator.

Development#

ULX3S USB permissions (Linux)#

If openFPGALoader fails with a USB permission error, add a udev rule for the FTDI device, then reload rules and replug the board.

Example rule (ULX3S FTDI 0403:6015):

SUBSYSTEM=="usb", ATTR{idVendor}=="0403", ATTR{idProduct}=="6015", MODE="0666"

Alternative (group-based):

SUBSYSTEM=="usb", ATTR{idVendor}=="0403", ATTR{idProduct}=="6015", GROUP="plugdev", MODE="0660"

Save as /etc/udev/rules.d/99-ulx3s.rules, then run:

sudo udevadm control --reload-rules

Suggested Editor Config#

Helix#

You can create a local .helix directory. A suggested languages.toml to put there would be:

[language-server.ruff]
command = "ruff"
args = ["server"]

[language-server.vhdl-ls]
command = "vhdl_ls"

[[language]]
name = "python"
language-servers = ["ruff"]
auto-format = true
formatter = { command = "ruff", args = ["format", "--stdin-filename", "tmp.py", "-"] }

[[language]]
name = "vhdl"
file-types = ["vhd", "vhdl"]
language-servers = ["vhdl-ls"]
auto-format = true
formatter = { command = "sh", args = ["-c", "tmp=$(mktemp); cat > \"$tmp\"; ghdl fmt --std=08 \"$tmp\"; rc=$?; rm -f \"$tmp\"; exit $rc"] }

The VHDL formatting requires a bit of a hack, because ghdl doesn't support stdin input.