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PiGpio.js
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PiGpio.js
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var GPIO_PATH = "/sys/class/gpio/";
//var GPIO_PATH = "./gpio/";
var self = this;
var fs = require('fs');
var _OutExported = new Array();
this.SetupPin = SetupPin;
this.OutputPin = OutputPin;
this.UnexportPin = UnexportPin;
this.CleanUpAllPins = CleanUpAllPins;
function SetupPin(pin, direction)
{
//console.log("blah: " + _OutExported.indexOf(pin));
if (_OutExported.indexOf(pin) != -1 )
{
UnexportPin(pin);
}
fs.writeFileSync(GPIO_PATH + "export", pin);
fs.writeFileSync(GPIO_PATH + "gpio" + pin + "/direction", direction);
if (direction == "out")
{
_OutExported.push(pin);
}
}
function OutputPin(pin, value)
{
if (_OutExported.indexOf(pin) == -1)
SetupPin(pin, "out");
var writeValue = "0";
if (value == true)
{
writeValue = "1";
}
fs.writeFileSync(GPIO_PATH + "gpio" + pin + "/value", writeValue);
}
function UnexportPin(pin)
{
index = _OutExported.indexOf(pin);
if (index != -1)
{
_OutExported.splice(index,1);
fs.writeFileSync(GPIO_PATH + "unexport", pin);
}
}
function CleanUpAllPins()
{
for (var i=_OutExported.length - 1; i>=0; i--)
{
UnexportPin(_OutExported[i]);
}
}