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mruby-WiringPi

How to use

  • checkout mruby
git clone https://github.com/mruby/mruby.git  # original mruby
  # or
git clone https://github.com/iij/mruby.git    # iij extended mruby (File, IO, Socket, ... extend)
  • edit build_config.rb
MRuby::Build.new do |conf|

    # ... (snip) ...

    conf.gem :git => 'https://github.com/akiray03/mruby-WiringPi.git'  # add this line
    conf.gem :git => 'https://github.com/matsumoto-r/mruby-sleep.git'  # add this line
end
  • build ruby ./minirake
  • exec sudo ./bin/mruby build/mrbgems/mruby-WiringPi/sample/sample.rb

Pin Mapping

wiringPi GPIO (Pin#) Name
0 17 GPIO 0
1 18 GPIO 1
2 27 GPIO 2
3 22 GPIO 3
4 23 GPIO 4
5 24 GPIO 5
6 25 GPIO 6
7 4 GPIO 7
8 2 SDA
9 3 SCL
10 8 CE0
11 7 CE1
12 10 MOSI
13 9 MISO
14 11 SCLK
15 14 TxD
16 15 RxD
17 28 GPIO 8
18 29 GPIO 9
19 30 GPIO10
20 31 GPIO11

sample

io = WiringPi::GPIO.new
pin = 0
io.mode(pin, WiringPi::OUTPUT)

5.times do
  puts "pin:#{pin} set high"
  io.write(pin, WiringPi::HIGH)
  sleep 1
  puts "pin:#{pin} set low"
  io.write(pin, WiringPi::LOW)
  sleep 1
end
io.read(pin)
  • WiringPi::Serial is not tested...

sample (LCD)

wiringPi GPIO (Pin#) Name LCD Port
0 17 GPIO 0 DB0
1 18 GPIO 1 DB1
2 27 GPIO 2 DB2
3 22 GPIO 3 DB3
4 23 GPIO 4 DB4
5 24 GPIO 5 DB5
6 25 GPIO 6 DB6
7 4 GPIO 7 DB7
12 10 MOSI Enable
13 9 MISO Register Select
  • The Read/Write pin must be connected to 0V/Ground.
lcd = LCD.new rows: 18, cols: 2, bits: 8, rs: 13, strb: 12, dpin: [0,1,2,3,4,5,6,7]

lcd.lcd_pos 0, 0
lcd.lcd_puts "Hello, mruby"
lcd.lcd_pos 0, 1
lcd.lcd_puts "Hi, Raspberry Pi"

TODO

  • cross build support

License

This software is licensed under the same license terms of WiringPi (https://github.com/WiringPi/WiringPi).

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