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php-linux-gpio
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Implemented base of GpioMapperInterface with WiringPiMapper

This commit is contained in:
Chris 2014-06-06 19:50:17 +02:00
parent d00bcde3ee
commit 633e254958
7 changed files with 445 additions and 36 deletions
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7
composer.json
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@ -9,6 +9,11 @@
}
],
"require": {
"noccylabs/sansi": "dev-master"
},
"autoload": {
"psr-4": {
"NoccyLabs\\Gpio\\": "lib/"
}
}
}

51
composer.lock generated Normal file
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@ -0,0 +1,51 @@
{
"_readme": [
"This file locks the dependencies of your project to a known state",
"Read more about it at http://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file"
],
"hash": "6ede4cbc5ab4ef05b58811c306b5376f",
"packages": [
{
"name": "noccylabs/sansi",
"version": "dev-master",
"source": {
"type": "git",
"url": "http://satis.noccylabs.info/packages/php-sansi.git",
"reference": "9e347698a898dc966802987fc4fbfa7bec7225b0"
},
"type": "library",
"autoload": {
"psr-4": {
"NoccyLabs\\Sansi\\": "lib/"
}
},
"license": [
"GPL-3.0"
],
"authors": [
{
"name": "Christopher Vagnetoft",
"email": "cvagnetoft@gmail.com"
}
],
"description": "Simple ANSI User Interface",
"time": "2014-06-05 12:10:14"
}
],
"packages-dev": [
],
"aliases": [
],
"minimum-stability": "stable",
"stability-flags": {
"noccylabs/sansi": 20
},
"platform": [
],
"platform-dev": [
]
}

42
examples/basic.php
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@ -2,21 +2,41 @@
require_once __DIR__."/../vendor/autoload.php";
use NoccyLabs\Linux\Gpio;
use NoccyLabs\Gpio\Gpio;
use NoccyLabs\Gpio\GpioMapper\WiringPiMapper;
try {
$gpio = new Gpio\Gpio();
$gpio = new Gpio();
} catch (Gpio\Exception $e) {
error_log("Error: {$e}");
}
$pin = $gpio->export(0);
$pin->setInterrupt("rising", function() {
echo "Interrupt on GPIO0\n";
});
// The mapper translates GPIO to logical pins and vice versa
$gpio->setMapper( new WiringPiMapper(2) );
// Access logical pin 0, since we got a mapper assigned. Otherwise this would
// be the actual GPIO0 pin.
$led = $gpio[0]
->export()
->setDirection("output")
->setValue(0)
->setLabel("red led")
->dumpStatus(true);
$btn = $gpio[1]
->setDirection("input")
->setValue(0)
->setEdge("rising")
->setHandler(function() { echo "INTERRUPT!\n"; })
->setLabel("button 1")
->dumpStatus(true);
$gpio[2]
->setDirection("input")
->setValue(0)
->setEdge("rising")
->setHandler(function() { echo "INTERRUPT!\n"; })
->setLabel("button 2")
->dumpStatus(true);
while(true) {
// We need to call this for our interrupt status to be polled
$gpio->update();
usleep(10000);
}

82
lib/Gpio.php
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@ -1,38 +1,72 @@
<?php
/*
* Copyright (C) 2014, NoccyLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
namespace NoccyLabs\Gpio;
class Gpio
class Gpio implements \ArrayAccess
{
public function __construct()
{}
protected $gpio = array();
/** @var NoccyLabs\Gpio\GpioMapperInterface */
protected $mapper;
// call export before getpin
public function getPin($pinno)
{}
public function refresh()
{
$read = $this->fd_gpio;
$write = array();
$except = $read;
select($read, $write, $except, 0);
foreach($except as $fd) {
$pin = $this->getPinFromFd($fd);
$pin->doInterrupt();
}
// export the pin
public function exportPin($pinno)
{}
}
// unexport the pin
public function unexportPin($pinno)
{}
public function setMapper(GpioMapperInterface $mapper=null)
{
$this->mapper = $mapper;
return $this;
}
// set handler, pass null to disable interrupts
public function setInterruptHandler(GpioPin $pin, callable $handler=null)
{}
public function offsetGet($index)
{
if ($this->mapper) { $index = $this->mapper->mapLogicalToGpioPin($index); }
if (empty($this->gpio[$index])) {
$this->gpio[$index] = new GpioPin($index);
}
return $this->gpio[$index];
}
// get the interrupt handler for the pin
public function getInterruptHandler(GpioPin $pin)
{}
public function offsetExists($index)
{
return array_key_exists($index, $this->gpio);
}
// set edge
public function setInterruptEdge(GpioPin $pin, $edge)
{}
public function offsetSet($index,$value)
{ throw new \Exception(); }
// get edge
public function getInterruptEdge(GpioPin $pin)
{}
public function offsetUnset($index)
{
unset($this->gpio[$index]);
}
}

86
lib/GpioMapper/WiringPiMapper.php Normal file
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@ -0,0 +1,86 @@
<?php
/*
* Copyright (C) 2014, NoccyLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
namespace NoccyLabs\Gpio\GpioMapper;
use NoccyLabs\Gpio\GpioMapperInterface;
class WiringPiMapper implements GpioMapperInterface
{
protected $version;
public function __construct($version=1)
{
$this->version = (int)$version;
}
/** {@inheritdoc} */
public function mapGpioToLogicalPin($gpio)
{
switch ($gpio) {
case 17: return 0;
case 18: return 1;
// ..
}
}
/** {@inheritdoc} */
public function mapLogicalToGpioPin($logical)
{
switch ($logical) {
case 0: return 17;
case 1: return 18;
case 2:
if ($this->version == 2) {
return 27;
}
return 21;
case 3: return 22;
case 4: return 23;
case 5: return 24;
case 6: return 25;
case 7: return 11;
case 8:
if ($this->version == 2) {
return 2;
}
return 0;
case 9:
if ($this->version == 2) {
return 3;
}
return 1;
case 10: return 8;
case 11: return 7;
case 12: return 10;
case 13: return 9;
case 14: return 11;
case 15: return 14;
case 16: return 15;
case 17: return 28;
case 18: return 29;
case 19: return 30;
case 20: return 31;
default:
throw new \Exception;
}
}
}

37
lib/GpioMapperInterface.php Normal file
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@ -0,0 +1,37 @@
<?php
/*
* Copyright (C) 2014, NoccyLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
namespace NoccyLabs\Gpio;
interface GpioMapperInterface
{
/**
* Map the GPIO pin numbers to a more logical number set, such as that of
* wiringPi.
*/
public function mapGpioToLogicalPin($gpio);
/**
* Map a logical pin number, such as the ones used by wiringPi, into the
* actual GPIO pin number.
*
*/
public function mapLogicalToGpioPin($logical);
}

176
lib/GpioPin.php Normal file
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@ -0,0 +1,176 @@
<?php
/*
* Copyright (C) 2014, NoccyLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
namespace NoccyLabs\Gpio;
use NoccyLabs\Sansi\Charset as CS;
/**
* GPIO pin implementation. This class wraps all interaction with a GPIO pin,
* thus decoupling it from the main Gpio class.
*
*/
class GpioPin
{
protected $fd;
protected $pin;
protected $value = 0;
protected $direction;
protected $edge;
protected $handler;
protected $label;
public function __construct($pin)
{
$this->pin = (int)$pin;
//$this->fd = fopen("/sys/class/gpio/gpio{$pin}/value", "rb");
}
public function __destruct()
{
//fclose($this->fd);
}
public function setDirection($direction)
{
if (!in_array($direction, array("input", "output"))) {
throw new \Exception;
}
$this->direction = $direction;
//file_put_contents("/sys/class/gpio/{$this->pin}/direction", $direction);
return $this;
}
public function getDirection()
{
return $this->direction;
}
public function setValue($value)
{
$this->value = (bool)$value;
//file_put_contents("/sys/class/gpio/{$this->pin}/value", (int)$this->value);
return $this;
}
public function getValue()
{
return $this->value;
}
public function setLabel($label)
{
$this->label = (string)$label;
return $this;
}
public function getLabel()
{
return $this->label;
}
public function export()
{
/*
file_put_contents("/sys/class/gpio/export", $this->pin);
if (!file_exists("/sys/class/gpio/gpio{$this->pin}")) {
throw new \Exception();
}
*/
return $this;
}
public function unexport()
{
//file_put_contents("/sys/class/gpio/unexport", $this->pin);
return $this;
}
public function setEdge($edge)
{
if (!in_array($edge, array("rising", "falling", "both", "none"))) {
throw new \Exception;
}
$this->edge = $edge;
//file_put_contents("/sys/class/gpio/{$this->pin}/edge", $edge);
return $this;
}
public function getEdge()
{
return $this->edge;
}
public function setHandler(callable $handler=null)
{
return $this;
}
public function doInterrupt()
{
fseek($this->fd,0,SEEK_SET);
$val = fgets($this->fd);
}
public function dumpStatus($ansi=false)
{
if ($ansi) {
$status = "\e[43;37;1m GPIO{$this->pin} \e[0m\n";
$direction = "\e[36;1m".
($this->direction=="input"?(CS::chr(0x2190)):(CS::chr(0x2192))).
"\e[0m ".$this->direction;
$edge = "\e[33;1m";
if ($this->edge == "rising") {
$edge.= CS::chr(0x21A5)."\e[0m rising";
} elseif ($this->edge == "falling") {
$edge.= CS::chr(0x21A7)."\e[0m falling";
} else {
$edge.= "\e[0m".$this->edge;
}
} else {
$status = "********** GPIO{$this->pin} **********\n";
$direction = $this->direction;
}
foreach(array(
"Direction" => $direction,
"Value" => ($this->value?1:0),
"Edge" => $edge,
"Label" => $this->label,
"Hardware" => "unknown",
"Int count" => 0
) as $k=>$v) {
if ($ansi) {
$status.= sprintf(" \e[32;1m%10s\e[0m: \e[0m%s\e[0m\n", $k, $v);
} else {
$status.= sprintf(" %-10s: %s\n", $k, $v);
}
}
error_log($status);
return $this;
}
}