mirror of
https://github.com/node-red/node-red.git
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285 lines
10 KiB
JavaScript
285 lines
10 KiB
JavaScript
/**
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* Copyright 2013,2014 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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module.exports = function(RED) {
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"use strict";
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var util = require("util");
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var exec = require('child_process').exec;
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var spawn = require('child_process').spawn;
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var fs = require('fs');
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var gpioCommand = __dirname+'/nrgpio';
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if (!fs.existsSync("/dev/ttyAMA0")) { // unlikely if not on a Pi
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//util.log("Info : Ignoring Raspberry Pi specific node.");
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throw "Info : Ignoring Raspberry Pi specific node.";
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}
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if (!fs.existsSync("/usr/share/doc/python-rpi.gpio")) {
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util.log("[rpi-gpio] Info : Can't find Pi RPi.GPIO python library.");
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throw "Warning : Can't find Pi RPi.GPIO python library.";
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}
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if ( !(1 & parseInt ((fs.statSync(gpioCommand).mode & parseInt ("777", 8)).toString (8)[0]) )) {
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util.log("[rpi-gpio] Error : "+gpioCommand+" needs to be executable.");
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throw "Error : nrgpio must to be executable.";
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}
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// the magic to make python print stuff immediately
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process.env.PYTHONUNBUFFERED = 1;
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var pinsInUse = {};
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var pinTypes = {"out":"digital output", "tri":"input", "up":"input with pull up", "down":"input with pull down", "pwm":"PWM output"};
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function GPIOInNode(n) {
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RED.nodes.createNode(this,n);
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this.buttonState = -1;
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this.pin = n.pin;
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this.intype = n.intype;
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this.read = n.read || false;
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if (this.read) { this.buttonState = -2; }
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var node = this;
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if (!pinsInUse.hasOwnProperty(this.pin)) {
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pinsInUse[this.pin] = this.intype;
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}
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else {
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if ((pinsInUse[this.pin] !== this.intype)||(pinsInUse[this.pin] === "pwm")) {
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node.warn("GPIO pin "+this.pin+" already set as "+pinTypes[pinsInUse[this.pin]]);
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}
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}
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if (node.pin !== undefined) {
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if (node.intype === "tri") {
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node.child = spawn(gpioCommand, ["in",node.pin]);
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} else {
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node.child = spawn(gpioCommand, ["in",node.pin,node.intype]);
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}
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node.running = true;
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node.status({fill:"green",shape:"dot",text:"OK"});
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node.child.stdout.on('data', function (data) {
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data = data.toString().trim();
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if (data.length > 0) {
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if (node.buttonState !== -1) {
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node.send({ topic:"pi/"+node.pin, payload:Number(data) });
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}
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node.buttonState = data;
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node.status({fill:"green",shape:"dot",text:data});
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if (RED.settings.verbose) { node.log("out: "+data+" :"); }
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}
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});
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node.child.stderr.on('data', function (data) {
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if (RED.settings.verbose) { node.log("err: "+data+" :"); }
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});
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node.child.on('close', function (code) {
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node.child = null;
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node.running = false;
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if (RED.settings.verbose) { node.log("closed"); }
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if (node.done) {
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node.status({fill:"grey",shape:"ring",text:"closed"});
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node.done();
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}
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else { node.status({fill:"red",shape:"ring",text:"stopped"}); }
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});
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node.child.on('error', function (err) {
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if (err.errno === "ENOENT") { node.error('nrgpio command not found'); }
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else if (err.errno === "EACCES") { node.error('nrgpio command not executable'); }
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else { node.log('error: ' + err); }
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});
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}
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else {
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node.warn("Invalid GPIO pin: "+node.pin);
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}
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node.on("close", function(done) {
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node.status({fill:"grey",shape:"ring",text:"close"});
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delete pinsInUse[node.pin];
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if (node.child != null) {
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node.done = done;
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node.child.stdin.write(" close "+node.pin);
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node.child.kill('SIGKILL');
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}
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else { done(); }
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});
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}
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RED.nodes.registerType("rpi-gpio in",GPIOInNode);
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function GPIOOutNode(n) {
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RED.nodes.createNode(this,n);
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this.pin = n.pin;
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this.set = n.set || false;
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this.level = n.level || 0;
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this.out = n.out || "out";
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var node = this;
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if (!pinsInUse.hasOwnProperty(this.pin)) {
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pinsInUse[this.pin] = this.out;
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}
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else {
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if ((pinsInUse[this.pin] !== this.out)||(pinsInUse[this.pin] === "pwm")) {
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node.warn("GPIO pin "+this.pin+" already set as "+pinTypes[pinsInUse[this.pin]]);
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}
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}
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function inputlistener(msg) {
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if (msg.payload === "true") { msg.payload = true; }
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if (msg.payload === "false") { msg.payload = false; }
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var out = Number(msg.payload);
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var limit = 1;
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if (node.out === "pwm") { limit = 100; }
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if ((out >= 0) && (out <= limit)) {
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if (RED.settings.verbose) { node.log("out: "+msg.payload); }
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if (node.child !== null) {
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node.child.stdin.write(msg.payload+"\n");
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node.status({fill:"green",shape:"dot",text:msg.payload.toString()});
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}
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else {
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node.error("nrpgio python command not running");
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node.status({fill:"red",shape:"ring",text:"not running"});
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}
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}
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else { node.warn("Invalid input: "+out); }
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}
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if (node.pin !== undefined) {
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if (node.set && (node.out === "out")) {
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node.child = spawn(gpioCommand, [node.out,node.pin,node.level]);
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} else {
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node.child = spawn(gpioCommand, [node.out,node.pin]);
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}
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node.running = true;
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node.status({fill:"green",shape:"dot",text:"OK"});
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node.on("input", inputlistener);
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node.child.stdout.on('data', function (data) {
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if (RED.settings.verbose) { node.log("out: "+data+" :"); }
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});
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node.child.stderr.on('data', function (data) {
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if (RED.settings.verbose) { node.log("err: "+data+" :"); }
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});
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node.child.on('close', function (code) {
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node.child = null;
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node.running = false;
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if (RED.settings.verbose) { node.log("closed"); }
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if (node.done) {
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node.status({fill:"grey",shape:"ring",text:"closed"});
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node.done();
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}
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else { node.status({fill:"red",shape:"ring",text:"stopped"}); }
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});
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node.child.on('error', function (err) {
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if (err.errno === "ENOENT") { node.error('nrgpio command not found'); }
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else if (err.errno === "EACCES") { node.error('nrgpio command not executable'); }
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else { node.log('error: ' + err); }
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});
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}
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else {
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node.warn("Invalid GPIO pin: "+node.pin);
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}
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node.on("close", function(done) {
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node.status({fill:"grey",shape:"ring",text:"close"});
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delete pinsInUse[node.pin];
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if (node.child != null) {
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node.done = done;
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node.child.stdin.write(" close "+node.pin);
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node.child.kill('SIGKILL');
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}
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else { done(); }
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});
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}
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var pitype = { type:"" };
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exec(gpioCommand+" rev 0", function(err,stdout,stderr) {
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if (err) {
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console.log('[rpi-gpio] Version command failed for some reason.');
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}
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else {
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if (stdout.trim() == "0") { pitype = { type:"Compute" }; }
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else if (stdout.trim() == "1") { pitype = { type:"A/B v1" }; }
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else if (stdout.trim() == "2") { pitype = { type:"A/B v2" }; }
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else if (stdout.trim() == "3") { pitype = { type:"Model B+" }; }
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else { console.log("SAW Pi TYPE",stdout.trim()); }
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}
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});
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RED.nodes.registerType("rpi-gpio out",GPIOOutNode);
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function PiMouseNode(n) {
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RED.nodes.createNode(this,n);
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this.butt = n.butt || 7;
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var node = this;
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node.child = spawn(gpioCommand+".py", ["mouse",node.butt]);
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node.status({fill:"green",shape:"dot",text:"OK"});
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node.child.stdout.on('data', function (data) {
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data = Number(data);
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if (data === 0) { node.send({ topic:"pi/mouse", button:data, payload:0 }); }
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else { node.send({ topic:"pi/mouse", button:data, payload:1 }); }
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});
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node.child.stderr.on('data', function (data) {
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if (RED.settings.verbose) { node.log("err: "+data+" :"); }
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});
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node.child.on('close', function (code) {
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node.child = null;
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node.running = false;
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if (RED.settings.verbose) { node.log("closed"); }
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if (node.done) {
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node.status({fill:"grey",shape:"ring",text:"closed"});
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node.done();
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}
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else { node.status({fill:"red",shape:"ring",text:"stopped"}); }
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});
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node.child.on('error', function (err) {
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if (err.errno === "ENOENT") { node.error('nrgpio command not found'); }
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else if (err.errno === "EACCES") { node.error('nrgpio ommand not executable'); }
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else { node.log('error: ' + err); }
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});
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node.on("close", function(done) {
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node.status({fill:"grey",shape:"ring",text:"close"});
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if (node.child != null) {
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node.done = done;
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node.child.kill('SIGINT');
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node.child = null;
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}
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else { done(); }
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});
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}
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RED.nodes.registerType("rpi-mouse",PiMouseNode);
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RED.httpAdmin.get('/rpi-gpio/:id', RED.auth.needsPermission('rpi-gpio.read'), function(req,res) {
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res.json(pitype);
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});
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RED.httpAdmin.get('/rpi-pins/:id', RED.auth.needsPermission('rpi-gpio.read'), function(req,res) {
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res.json(pinsInUse);
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});
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}
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