Filesystem GPIO

## Description

This PHP library allow you to handle GPIO access based on Sysfs interface found on Linux systems. Under the hood, this is using ReactPHP and my fork from excellent calcinai/rubberneck in order to capture filesystem events (write...).

## Installation

composer req devgiants/filesystem-gpio

Important : install inotify-tools package (named like this on Debian) in order to have proper filesystem event raising system

Usage

use Devgiants\FilesystemGPIO\Model\Board\Board;
use Devgiants\FilesystemGPIO\Model\GPIO\Logic;

try {
    // Board is the linking object carrying all GPIOs
	$board = Board::create();	

	// Numbers 203 or 200 are the Linux GPIO number given by the hardware manufaturer
	$gpo  = $board->registerGPO( 203 );

    // You can invert logic (TTL) to make 0V as the high state.				
	$gpi  = $board->registerGPI( 200, Logic::ACTIVE_LOW );	

    // After, you can manipulate
    $gpo->set(); // will output 5V on GPIO 203
    
    
    // ReactPHP use for input interruption
    $gpi->on( GPIO::AFTER_VALUE_CHANGE_EVENT, function () use ( $gpi, $gpo ) {
        // As declared in inverted logic, isSet() will be true if physical voltage is 0V
        if($gpi->isSet()) {
            $gpo->reset()
        }
    });
	
} catch ( \Exception $exception ) {
	echo "{$exception->getCode()} - {$exception->getMessage()}";
}

## To come

I2C, UART, SPI... And switch to Python to ensure lower level capabilities (especially for hig speed toggling)

bartvanhoutte/filesystem-gpio

Filesystem GPIO

Usage