222 lines
7.6 KiB
JavaScript
222 lines
7.6 KiB
JavaScript
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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 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 Pibrella specific node.");
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throw "Info : Ignoring Raspberry Pibrella 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-pibrella] Info : Can't find RPi.GPIO python library.");
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throw "Warning : Can't find 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-pibrella] Error : "+gpioCommand+" needs to be executable.");
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throw "Error : " + gpioCommand + " must to be executable.";
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}
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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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var pintable = {
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// Name : Pin
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"Amber LED":"11",
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"Buzzer ":"12",
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"Red LED":"13",
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"Out E":"15",
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"Out F":"16",
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"Out G":"18",
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"Out H":"22",
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"Green LED":"7",
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"In D":"19",
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"In A":"21",
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"In B":"26",
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"In C":"24",
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"Red Button":"23"
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}
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var tablepin = {
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// Pin : Name
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"11":"Amber",
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"12":"Buzzer",
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"13":"Red",
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"15":"E",
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"16":"F",
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"18":"G",
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"22":"H",
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"7":"Green",
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"19":"D",
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"21":"A",
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"26":"B",
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"24":"C",
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"23":"R"
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}
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function PibrellaIn(n) {
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RED.nodes.createNode(this,n);
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this.buttonState = -1;
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this.pin = pintable[n.pin];
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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] = "tri";
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}
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else {
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if ((pinsInUse[this.pin] !== "tri")||(pinsInUse[this.pin] === "pwm")) {
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node.error("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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node.child = spawn(gpioCommand, ["in",node.pin,"down",35]);
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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:"pibrella/"+tablepin[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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if (RED.settings.verbose) { node.log("ret: "+code+" :"); }
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node.child = null;
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node.running = false;
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node.status({fill:"red",shape:"circle",text:""});
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});
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node.child.on('error', function (err) {
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if (err.errno === "ENOENT") { node.warn('Command not found'); }
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else if (err.errno === "EACCES") { node.warn('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.error("Invalid GPIO pin: "+node.pin);
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}
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node.on("close", function() {
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if (node.child != null) {
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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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node.status({fill:"red",shape:"circle",text:""});
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delete pinsInUse[node.pin];
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if (RED.settings.verbose) { node.log("end"); }
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});
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}
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RED.nodes.registerType("rpi-pibrella in",PibrellaIn);
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function PibrellaOut(n) {
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RED.nodes.createNode(this,n);
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this.pin = pintable[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.error("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 (node.pin === "12") {
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limit = 4096;
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if (out === 1) { out = 262; }
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}
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if ((out >= 0) && (out <= limit)) {
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if (RED.settings.verbose) { node.log("inp: "+msg.payload); }
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if (node.child !== null) { node.child.stdin.write(out+"\n"); }
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else { node.warn("Command not running"); }
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node.status({fill:"green",shape:"dot",text:msg.payload});
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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.pin === "12") {
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node.child = spawn(gpioCommand, ["buzz",node.pin]);
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} else {
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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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}
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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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if (RED.settings.verbose) { node.log("ret: "+code+" :"); }
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node.child = null;
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node.running = false;
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node.status({fill:"red",shape:"circle",text:""});
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});
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node.child.on('error', function (err) {
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if (err.errno === "ENOENT") { node.warn('Command not found'); }
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else if (err.errno === "EACCES") { node.warn('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.error("Invalid GPIO pin: "+node.pin);
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}
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node.on("close", function() {
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if (node.child != null) {
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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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node.status({fill:"red",shape:"circle",text:""});
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delete pinsInUse[node.pin];
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if (RED.settings.verbose) { node.log("end"); }
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});
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}
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RED.nodes.registerType("rpi-pibrella out",PibrellaOut);
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RED.httpAdmin.get('/rpi-pibpins/:id',RED.auth.needsPermission('rpi-pibrella.read'),function(req,res) {
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res.json(pinsInUse);
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});
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}
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