https://github.com/cannikin/gpio_pure

A Ruby library for talking to the GPIO pins on a Raspberry Pi using the native /sys/class/gpio functionality built into the Raspian OS
https://github.com/cannikin/gpio_pure

Last synced: about 2 months ago
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A Ruby library for talking to the GPIO pins on a Raspberry Pi using the native /sys/class/gpio functionality built into the Raspian OS

• Host: GitHub
• URL: https://github.com/cannikin/gpio_pure
• Owner: cannikin
• Created: 2013-01-04T23:00:40.000Z (almost 12 years ago)
• Default Branch: master
• Last Pushed: 2013-01-04T23:41:42.000Z (almost 12 years ago)
• Last Synced: 2024-10-12T15:22:45.519Z (3 months ago)
• Language: Ruby
• Size: 117 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# GPIO Pure

A Ruby library for talking to the GPIO pins on a Raspberry Pi using the native

`/sys/class/gpio` functionality built into the Raspian OS.

## A note on pins

Pin numbering on the Raspberry Pi can be confusing. You will see references to

three different numbering schemes:

1. The physical pins on the Raspberry Pi, numbered 1 - 26

2. The GPIO pin number that the on-board Broadcom chip understands (jumps around

   from 17 to 31 back to 0...these are all over the place)

3. The wiringPi numbering scheme, numbered from 0 - 16. wiringPi is a popular

   C library that gives you access to the GPIO pins in a more programmatic way.

   The author, [Gordon](https://projects.drogon.net/raspberry-pi/wiringpi/) 

   did what the Arduino does which is re-number the pins in numerical order

   regardless of what the actual on-board chip calls them internally. The

   wiringPi numbering scheme is what gpio_pure uses. For more info, see:

   https://projects.drogon.net/raspberry-pi/wiringpi/

   

## Usage

    require 'gpio'

    GPIO.write 0, 1  # Set the output of pin 0 high

    GPIO.write 0, 0  # Set the output of pin 1 low

    GPIO.read 1      # Read the current value of pin 1

    GPIO.clear 1     # Optional, removes the pin's virtual file from the OS