node-red-contrib-smartnode/hardwareOutput/blink/blink.js

this project is a nodejs package for making the nodered support the Smart Device development. the pacakge require node-red enviroment.

/**
 * Copyright 2015, 2015 MakerCollider.
 *
 * 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 checkPin = require("node-red-contrib-smartnode/extends/check_pin");
    var groveSensor = require("jsupm_grove");
    function blink(config) {
        RED.nodes.createNode(this, config);
        this.digitalPin = config.digitalPin;
        this.interval = config.interval;
        var node = this;
        
	   var myinterval=null;
        var is_on = false;
        node.digitalPin = node.digitalPin>>>0;
        var key = 'P'+node.digitalPin;
        if (checkPin.getDigitalPinValue(key)==1){
            node.status({fill: "red", shape: "dot", text: "pin repeat"});
            console.log('LED blink digital pin ' + node.digitalPin +' repeat');
            return;
        }
        else if (checkPin.getDigitalPinValue(key)==0){
            checkPin.setDigitalPinValue(key, 1);
            node.status({fill: "blue", shape: "ring", text: "pin check pass"});
            console.log('LED blink digital pin ' + node.digitalPin +' OK');
        }
        else{
            node.status({fill: "blue", shape: "ring", text: "Unknown"});
            console.log('unknown pin' + node.digitalPin + ' key value' + checkPin.getDigitalPinValue(key));
            return;
        }

        var led = new groveSensor.GroveLed(node.digitalPin);  

		this.on('input', function(msg){
			if (msg.payload==1)
			{
                        if(is_on == false)
                        {
                        is_on = true;
			var i = 0;
			myinterval = setInterval(function() {
				if (i%2 == 0){
					led.on();
				}else{
					led.off();
				}
				i++;
			},node.interval);
                        }			
			}
			else if (msg.payload==0)
			{
                        if(is_on == true)
                        {
                            is_on = false;
				clearInterval(myinterval);
                                led.off(); 
                        }
			}
		});	
		
        this.on('close', function() {
                clearInterval(myinterval);
              checkPin.initDigitalPin();  //init pin
        });	
   
    }


    RED.nodes.registerType("Blink", blink);
}