PRK Firmware ADC example

keymap.rb

require "adc"
require "mouse"

kbd = Keyboard.new

kbd.init_direct_pins( [8] )

kbd.add_layer :default, %i(BOOTSEL)

kbd.define_mode_key :BOOTSEL, [ Proc.new { kbd.bootsel! }, nil, 300, nil ]

adc_x = ADC.new(26)
adc_y = ADC.new(27)

# Adjust center offset
x_offset = 0
y_offset = 0
3.times do
  sleep_ms 20
  x_offset += adc_x.read
  y_offset += adc_y.read
end
x_offset /= 3
y_offset /= 3

mouse = Mouse.new(driver: [adc_x, adc_y])

mouse.task do |mouse|
  # Note: `driver.map(&:read)` doesn't work in mruby/c VM yet
  x, y = mouse.driver.map { |adc| adc.read}
  x -= x_offset
  y -= y_offset
  USB.merge_mouse_report(0,
                         x.abs < 300 ? 0 : x/100,#.clamp(-100, 100),
                         y.abs < 300 ? 0 : y/-100,#.clamp(-100, 100),
                         0,
                         0)
end

kbd.append mouse

kbd.start!