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node-red-nodes/hardware/intel/mraa-gpio-din.js
2017-01-29 17:45:44 +00:00

57 lines
1.8 KiB
JavaScript

module.exports = function(RED) {
var m = require('mraa');
//console.log("BOARD :",m.getPlatformName());
function gpioDin(n) {
RED.nodes.createNode(this,n);
this.pin = n.pin;
this.interrupt = n.interrupt;
this.x = new m.Gpio(parseInt(this.pin));
this.board = m.getPlatformName();
var node = this;
node.x.mode(m.PIN_GPIO);
node.x.dir(m.DIR_IN);
node.x.isr(m.EDGE_BOTH, function() {
var g = node.x.read();
var msg = { payload:g, topic:node.board+"/D"+node.pin };
switch (g) {
case 0: {
node.status({fill:"green",shape:"ring",text:"low"});
if (node.interrupt=== "f" || node.interrupt === "b") {
node.send(msg);
}
break;
}
case 1: {
node.status({fill:"green",shape:"dot",text:"high"});
if (node.interrupt=== "r" || node.interrupt === "b") {
node.send(msg);
}
break;
}
default: {
node.status({fill:"grey",shape:"ring",text:"unknown"});
}
}
});
switch (node.x.read()) {
case 0: {
node.status({fill:"green",shape:"ring",text:"low"});
break;
}
case 1: {
node.status({fill:"green",shape:"dot",text:"high"});
break;
}
default: {
node.status({});
}
}
this.on('close', function() {
node.x.isr(m.EDGE_BOTH, null);
});
}
RED.nodes.registerType("mraa-gpio-din", gpioDin);
}