hasumikin

#!/usr/bin/env ruby

require 'fileutils'

DEFAULT_DEVICE = '/dev/ttyUSB0'
DEFAULT_BAUDRATE = '115200'

if ARGV.include?('--help') || ARGV.include?('-h')
  puts <<~HELP
    This script connects to a serial device using 'screen' and automatically

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PicoRuby Workshop 2025 - Setup & LED Control

Before starting, please check the following resources:

• Terminal emulator (Many of you have already read): https://picoruby.github.io/terminal-emulator
• Setup R2P2: https://picoruby.github.io/setup
  • In this workshop, we use R2P2-PICORUBY-PICO2_W-*.uf2 (PICO2_W is the point)
• Breadboard basics: https://picoruby.github.io/breadboard-basics
• Troubleshooting: https://picoruby.github.io/troubleshooting

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Setup, general information and trouble shooting

Important Notes

(Also read Trouble Shoot)

Laptop Security Settings

If your laptop is configured to prohibit writing to USB memory devices, likely due to your company's security policy, it will not function in the workshop😣

hasumikin

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 ]

hasumikin

require "spi"
require "mouse"
require "consumer_key"

class SPI
  def pmw3360dm_write(*values)
    GPIO.write_at(21, 0)
    write(*values)
    Machine.delay_us 20
    GPIO.write_at(21, 1)

hasumikin

#
# Pin assignment:
# switch matrix:
#   row: 1, 2, 3, 4
#   col: 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18
# RGBLED: 0
# I2C0: trackball and RTC
#   sda_pin: 20
#   scl_pin: 21
# SPI1: 

hasumikin

$ #
$ #  irb.wasm - IRB on CRuby on WebAssembly
$ #
$ # Source code is available at https://github.com/kateinoigakukun/irb.wasm
$ #
$ # QUICK START 
$ #   1. Install gem by `gem "haml" 
$ #   2. `require "haml"` 
$ #   3. `Term.echo Haml::Template.new { "%h1 Haml code!" }.render` 
$ #

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Connection

Note that RP2 (debug target) should be powered, too.

Run Powershell as an admin

You may need to upgrade usbipd : https://github.com/dorssel/usbipd-win/releases

hasumikin

puts "==== Pico87 ===="

kbd = Keyboard.new

kbd.init_pins(
  [ 18, 19, 20, 21, 22, 26 ],
  [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 ]
)

# 0        1       2       3       4     5     6      7     8     9     10      11        12       13       14        15         16            17

hasumikin

class Keyboard
  def grave_escape
    index = @keycodes.index(KEYCODE.index(:KC_ESCAPE).chr)
    if index
      if (@modifier & 0b00010001) > 0    # CTRL
        # Do nothing so that "SHIFT+CTRL+ESCAPE" opens Task Manager
      elsif (@modifier & 0b00100010) > 0 # SHIFT
        @keycodes[index] = KEYCODE.index(:KC_GRAVE).chr
      elsif (@modifier & 0b10001000) > 0 # GUI
        @keycodes[index] = KEYCODE.index(:KC_GRAVE).chr