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node-red-nodes/hardware/intel/mraa-gpio-din.js

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2015-09-21 18:03:50 +02:00
/**
* Copyright 2015 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
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);
}