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pigpio

pigpio is a C library for the Raspberry which allows control of the General Purpose Input Outputs (GPIO).

Features

Interfaces

The library provides a number of control interfaces

Utilities

A number of utility programs are provided:

Documentation

See http://abyz.me.uk/rpi/pigpio/

Example programs

See http://abyz.me.uk/rpi/pigpio/examples.html

GPIO

ALL GPIO are identified by their Broadcom number. See http://elinux.org.

There are 54 GPIO in total, arranged in two banks.

Bank 1 contains GPIO 0-31. Bank 2 contains GPIO 32-54.

A user should only manipulate GPIO in bank 1.

There are at least three types of board:

It is safe to read all the GPIO. If you try to write a system GPIO or change its mode you can crash the Pi or corrupt the data on the SD card.