sunxi_gpio gem

Native Ruby Extension to work with Sunxi GPIO. This gem is currently beta. It supports writing, reading, watching.

Installtion

gem install sunxi_gpio

Usage

Simple writing

require 'sunxi_gpio/pin'

SunxiGPIO::Pin.open

pin = SunxiGPIO::Pin.new(pin: :PB2, direction: :out)
pin.on
sleep 1
pin.off

SunxiGPIO::Pin.close

Simple reading

require 'sunxi_gpio/pin'

SunxiGPIO::Pin.open

pin = SunxiGPIO::Pin.new(pin: :PB2, direction: :in)

10.times do
  value = pin.read
  puts "result: #{value}"
  sleep 1
end

SunxiGPIO::Pin.close

Watch

Watches the pin going to status in parameter and executes the block. Block will only be triggered with a status change is seen.

require 'sunxi_gpio/pin'

SunxiGPIO::Pin.open

pin = SunxiGPIO::Pin.new(pin: :PB2, direction: :out)

pin.watch(SunxiGPIO::PinValues::GPIO_LOW) do
  puts "I am in the loop with value #{pin.read}"
end

SunxiGPIO::Pin.close

Enable pull for a pin

When using pins as input, you can use internal resistors to pull the pin up or pull down. This is important if you use open-collector sensors which have floating output in some states. Pull can be used as :up or :down -depending of the type of layout.

SunxiGPIO::Pin.open

pin = SunxiGPIO::Pin.new(pin: :PI15, direction: :in, pull: :up)
value=pin.read

SunxiGPIO::Pin.close

Contributors

• phortx
• happychriss