Using an Arduino as a logic analyzer

Using an arduino uno as a logic analyzer

shell.nix

{ pkgs ? import <nixpkgs> {} }:
let
  unstable = import <unstable> {};
in
  pkgs.mkShell {
    buildInputs = [
      pkgs.arduino
      unstable.pkgs.pulseview
    ];
    shellHook = ''
set -e
export ARDUINO_DIR=${pkgs.arduino-core}/share/arduino
# Needed to fix hanky borken window not resizing in wayland...
export _JAVA_AWT_WM_NONREPARENTING=1
export PATH="$PATH:$ARDUINO_DIR"
    '';
}

$ git clone https://github.com/gillham/logic_analyzer
$ cd logic_analyzer
$ arduino .

Tools > port > /dev/usbTTY1

Click upload...

arduino ide showing files and successful upload

$ pulseview

a selection dialog selecting arduino in pulseview — Selecting the arduino board in pulseview

a graph showing jittery up down results — It's a wonder the stepper was spinning at all

After selecting the proper ports 8 9 10 11 this jumbled mess appears

Time to start figuring out why it's such a mess and how to clean it up.