some scripts

firmware/ctrl.rb

@@ -0,0 +1,60 @@
+#!/Users/aaron/.rubies/arm64/ruby-trunk/bin/ruby
+
+require "myhidapi"
+
+class Handle
+  NONE      = 0
+  BACKLIGHT = 1
+  RESET     = 2
+  DRIVE     = 3
+  NEUTRAL   = 4
+  REVERSE   = 5
+  PARK      = 6
+
+  def initialize
+    devices = MyHIDAPI.enumerate 0x0, 0x0
+    dev = devices.find { |dev|
+      if dev.product_string =~ /Initial/i
+        p dev
+      end
+      dev.product_string =~ /Initial/i && dev.usage == 0x61
+    }
+    @handle = dev.open
+    100.times do
+      break if @handle
+      @handle = dev.open
+    end
+    raise "Couldn't connect" unless @handle
+  end
+
+  def reset!; send_command RESET; end
+  def drive!; send_command DRIVE; end
+  def neutral!; send_command NEUTRAL; end
+  def reverse!; send_command REVERSE; end
+  def park!; send_command PARK; end
+  def backlight!; send_command BACKLIGHT; end
+
+  private
+
+  def send_command cmd, param = nil
+    buf = [0x0, cmd, param].compact
+    loop do
+      break if @handle.write buf.pack('C*')
+    end
+  end
+end
+
+if __FILE__ == $0
+  handle = Handle.new
+  cmd = ARGV[0] || "reset"
+  case cmd
+  when "reset"
+    handle.reset!
+    sleep 1
+    handle.backlight!
+  when "drive" then handle.drive!
+  when "neutral" then handle.neutral!
+  when "park" then handle.park!
+  when "reverse" then handle.reverse!
+  end
+end

firmware/reset.rb

@@ -0,0 +1,19 @@
+require "uchip/mcp2221"
+
+# Find the first connected chip
+chip = UChip::MCP2221.first || raise("Couldn't find the chip!")
+
+p chip.gpio_value 0
+p chip.gpio_value 1
+
+chip.set_gpio_value 0, 0
+chip.set_gpio_value 1, 0
+
+chip.set_gpio_value 0, 1
+chip.set_gpio_value 1, 0
+
+chip.set_gpio_value 0, 0
+chip.set_gpio_value 1, 1
+
+chip.set_gpio_value 0, 0
+chip.set_gpio_value 1, 0