node-red-node-rdk-gpio
Version:
配合RDK硬件使用GPIO功能的功能包(The basic Node-RED node for RDK GPIO)
410 lines (359 loc) • 16.7 kB
JavaScript
module.exports = function(RED) {
"use strict";
var execSync = require('child_process').execSync;
var exec = require('child_process').exec;
var spawn = require('child_process').spawn;
var spawnSync = require('child_process').spawnSync;
var testCommand = __dirname+'/lib/sh/gpiochecker';
var gpioCommand = __dirname+'/lib/sh/nrgpio';
var gpioCommandSudo = __dirname+'/lib/sh/nrgpiosudo';
var allOK = true;
RED.log.info('Loading rdk-gpio nodes...')
try {
execSync(testCommand);
} catch(err) {
allOK = false;
RED.log.warn("rdk-gpio : "+RED._("rdk-gpio.errors.ignorenode"));
}
// the magic to make python print stuff immediately
process.env.PYTHONUNBUFFERED = 1;
var pinsInUse = {};
var pinTypes = {
"out":RED._("rdk-gpio.types.digout"),
"tri":RED._("rdk-gpio.types.input"),
"up":RED._("rdk-gpio.types.pullup"),
"down":RED._("rdk-gpio.types.pulldown"),
"pwm":RED._("rdk-gpio.types.pwmout"),
"softpwm":RED._("rdk-gpio.types.softpwm")
};
var pin2bcm = { '3':'2', '5':'3', '7':'4', '8':'14', '10':'15', '11':'17', '12':'18', '13':'27',
'15':'22', '16':'23', '18':'24', '19':'10', '21':'9', '22':'25', '23':'11', '24':'8', '26':'7',
'29':'5', '31':'6', '32':'12', '33':'13', '35':'19', '36':'16', '37':'26', '38':'20', '40':'21'
}
function getChildPids(pid, pids){
try{
var childPidBuffer = execSync('pgrep -P ' + pid);
var childPid = childPidBuffer.toString().replace(/\r?\n/g, '');
pids.push(childPid);
getChildPids(childPid, pids);
}
catch(e){
return;
}
return;
}
function GPIOOutNode(n) {
RED.nodes.createNode(this,n);
this.pin = (n.bcm === true) ? n.pin : pin2bcm[n.pin];
this.set = n.set || false;
this.level = n.level || 0;
this.freq = n.freq || 48000;
this.out = n.out || "out";
var node = this;
// console.log('pin&type: ', this.pin, this.out)
if (!pinsInUse.hasOwnProperty(this.pin)) {
pinsInUse[this.pin] = this.out;
}
else {
if ((pinsInUse[this.pin] !== this.out)||(pinsInUse[this.pin] === "pwm")) {
node.warn(RED._("rdk-gpio.errors.alreadyset",{pin:this.pin,type:pinTypes[pinsInUse[this.pin]]}));
}
}
function inputlistener(msg, send, done) {
if (msg.payload === "true") { msg.payload = true; }
if (msg.payload === "false") { msg.payload = false; }
var out = Number(msg.payload);
var limit = 1;
if (node.out === "pwm") { limit = 48000; }
if ((out >= 0) && (out <= limit)) {
if (RED.settings.verbose) { node.log("out: "+out); }
if (node.child !== null) {
node.child.stdin.write(out+"\n", () => {
// console.log('write: ', out);
if (done) { done(); }
});
node.status({fill:"green",shape:"dot",text:msg.payload.toString()});
}
else {
node.error(RED._("rdk-gpio.errors.pythoncommandnotfound"),msg);
node.status({fill:"red",shape:"ring",text:"rdk-gpio.status.not-running"});
}
}
else { node.warn(RED._("rdk-gpio.errors.invalidinput")+": "+out); }
}
if (allOK === true) {
// console.log('pin: ', node.pin, node.set, node.out)
if (node.pin !== undefined) {
if (node.out === "out") {
node.child = spawn(gpioCommand, [node.out,node.pin,node.level]);
node.status({fill:"green",shape:"dot",text:node.level});
} else {
node.child = spawn(gpioCommand, [node.out,node.pin,node.freq]);
node.status({fill:"yellow",shape:"dot",text:"rdk-gpio.status.ok"});
}
node.running = true;
node.on("input", inputlistener);
node.child.stdout.on('data', function (data) {
// console.log('on data: ', data.toString())
if (RED.settings.verbose) { node.log("out: "+data+" :"); }
});
node.child.stderr.on('data', function (data) {
if (RED.settings.verbose) { node.log("err: "+data+" :"); }
});
node.child.on('close', function (code) {
node.child = null;
node.running = false;
if (RED.settings.verbose) { node.log(RED._("rdk-gpio.status.closed")); }
if (node.finished) {
node.status({fill:"grey",shape:"ring",text:"rdk-gpio.status.closed"});
node.finished();
}
else { node.status({fill:"red",shape:"ring",text:"rdk-gpio.status.stopped"}); }
});
node.child.on('error', function (err) {
if (err.code === "ENOENT") { node.error(RED._("rdk-gpio.errors.commandnotfound")+err.path,err); }
else if (err.code === "EACCES") { node.error(RED._("rdk-gpio.errors.commandnotexecutable")+err.path,err); }
else { node.error(RED._("rdk-gpio.errors.error",{error:err.code}),err) }
});
node.child.stdin.on('error', function (err) {
if (!node.finished) {
node.error(RED._("rdk-gpio.errors.error",{error:err.code}),err);
}
});
}
else {
node.warn(RED._("rdk-gpio.errors.invalidpin")+": "+node.pin);
}
}
else {
node.status({fill:"grey",shape:"dot",text:"rdk-gpio.status.not-available"});
node.on("input", function(msg) {
node.status({fill:"grey",shape:"dot",text:RED._("rdk-gpio.status.na",{value:msg.payload.toString()})});
});
}
node.on("close", function(done) {
node.status({fill:"grey",shape:"ring",text:"rdk-gpio.status.closed"});
delete pinsInUse[node.pin];
if (node.child != null) {
node.finished = done;
node.child.stdin.write("close "+node.pin, () => {
node.child.kill('SIGKILL');
setTimeout(function() { if (done) { done(); } }, 50);
});
}
else { if (done) { done(); } }
});
}
RED.nodes.registerType("rdk-gpio out", GPIOOutNode);
// RED.nodes.registerType("rdk-gpio soft pwm", GPIOOutNode);
RED.nodes.registerType("rdk-gpio pwm", GPIOOutNode);
function GPIOInNode(n) {
RED.nodes.createNode(this,n);
this.buttonState = -1;
this.pin = (n.bcm === true) ? n.pin : pin2bcm[n.pin];
this.intype = n.intype;
this.read = n.read || false;
this.debounce = Number(n.debounce || 25);
if (this.read) { this.buttonState = -2; }
var node = this;
if (!pinsInUse.hasOwnProperty(this.pin)) {
pinsInUse[this.pin] = this.intype;
}
else {
if ((pinsInUse[this.pin] !== this.intype)||(pinsInUse[this.pin] === "pwm")) {
node.warn(RED._("rdk-gpio.errors.alreadyset",{pin:this.pin,type:pinTypes[pinsInUse[this.pin]]}));
}
}
var startPin = function() {
node.child = spawn(gpioCommand, ["in",node.pin,node.intype,node.debounce]);
node.running = true;
node.status({fill:"yellow",shape:"dot",text:"rdk-gpio.status.ok"});
node.child.stdout.on('data', function (data) {
var d = data.toString().trim().split("\n");
for (var i = 0; i < d.length; i++) {
if (d[i] === '') { return; }
if (node.running && node.buttonState !== -1 && !isNaN(Number(d[i])) && node.buttonState !== d[i]) {
node.send({ topic:"gpio/"+node.pin, payload:Number(d[i]) });
}
node.buttonState = d[i];
node.status({fill:"green",shape:"dot",text:d[i]});
if (RED.settings.verbose) { node.log("out: "+d[i]+" :"); }
}
});
node.child.stderr.on('data', function (data) {
if (RED.settings.verbose) { node.log("err: "+data+" :"); }
});
node.child.on('close', function (code) {
node.running = false;
node.child.removeAllListeners();
delete node.child;
if (RED.settings.verbose) { node.log(RED._("rdk-gpio.status.closed")); }
if (!node.finished && code === 1) {
setTimeout(function() {startPin()}, 250);
}
else if (node.finished) {
node.status({fill:"grey",shape:"ring",text:"rdk-gpio.status.closed"});
node.finished();
}
else { node.status({fill:"red",shape:"ring",text:"rdk-gpio.status.stopped"}); }
});
node.child.on('error', function (err) {
if (err.code === "ENOENT") { node.error(RED._("rdk-gpio.errors.commandnotfound")+err.path,err); }
else if (err.code === "EACCES") { node.error(RED._("rdk-gpio.errors.commandnotexecutable")+err.path,err); }
else { node.error(RED._("rdk-gpio.errors.error",{error:err.code}),err) }
});
node.child.stdin.on('error', function (err) {
if (!node.finished) {
node.error(RED._("rdk-gpio.errors.error",{error:err.code}),err);
}
});
}
if (allOK === true) {
if (node.pin !== undefined) {
startPin();
}
else {
node.warn(RED._("rdk-gpio.errors.invalidpin")+": "+node.pin);
}
}
else {
node.status({fill:"grey",shape:"dot",text:"rdk-gpio.status.not-available"});
if (node.read === true) {
var val;
if (node.intype == "up") { val = 1; }
if (node.intype == "down") { val = 0; }
setTimeout(function() {
node.send({ topic:"gpio/"+node.pin, payload:val });
node.status({fill:"grey",shape:"dot",text:RED._("rdk-gpio.status.na",{value:val})});
},250);
}
}
node.on("close", function(done) {
node.status({fill:"grey",shape:"ring",text:"rdk-gpio.status.closed"});
delete pinsInUse[node.pin];
if (node.child != null) {
node.finished = done;
node.child.stdin.write("close "+node.pin, () => {
if (node.child) {
node.child.kill('SIGKILL');
}
});
}
else { if (done) { done(); } }
});
}
RED.nodes.registerType("rdk-gpio in",GPIOInNode);
function IOMouseNode(n) {
RED.nodes.createNode(this,n);
this.butt = n.butt || 7;
var node = this;
if (allOK === true) {
node.child = spawn(gpioCommandSudo, ["mouse",node.butt]);
node.status({fill:"green",shape:"dot",text:"rdk-gpio.status.ok"});
node.child.stdout.on('data', function (data) {
data = Number(data);
if (data !== 0) { node.send({ topic:"io/mouse", button:data, payload:1 }); }
else { node.send({ topic:"io/mouse", button:data, payload:0 }); }
});
node.child.stderr.on('data', function (data) {
if (RED.settings.verbose) { node.log("err: "+data+" :"); }
});
node.child.on('close', function (code) {
node.child = null;
node.running = false;
if (RED.settings.verbose) { node.log(RED._("rdk-gpio.status.closed")); }
if (node.finished) {
node.status({fill:"grey",shape:"ring",text:"rdk-gpio.status.closed"});
node.finished();
}
else { node.status({fill:"red",shape:"ring",text:"rdk-gpio.status.stopped"}); }
});
node.child.on('error', function (err) {
if (err.errno === "ENOENT") { node.error(RED._("rdk-gpio.errors.commandnotfound")); }
else if (err.errno === "EACCES") { node.error(RED._("rdk-gpio.errors.commandnotexecutable")); }
else { node.error(RED._("rdk-gpio.errors.error")+': ' + err.errno); }
});
node.on("close", function(done) {
node.status({fill:"grey",shape:"ring",text:"rdk-gpio.status.closed"});
if (node.child != null) {
node.finished = done;
var pids = [node.child.pid.toString()];
getChildPids(node.child.pid, pids);
execSync('sudo kill -9 ' + pids.join(' '));
// node.child.kill('SIGINT');
node.child = null;
}
else { done(); }
});
}
else {
node.status({fill:"grey",shape:"dot",text:"rdk-gpio.status.not-available"});
}
}
RED.nodes.registerType("rdk-mouse",IOMouseNode);
function IOKeyboardNode(n) {
RED.nodes.createNode(this,n);
var node = this;
var sudoprocess = 0;
var doConnect = function() {
node.child = spawn(gpioCommandSudo, ["kbd", "0"]);
node.status({fill:"green",shape:"dot",text:"rdk-gpio.status.ok"});
node.child.stdout.on('data', function (data) {
var d = data.toString().trim().split("\n");
for (var i = 0; i < d.length; i++) {
if (d[i] !== '') {
var b = d[i].trim().split(",");
var act = "up";
if (b[1] === "1") { act = "down"; }
if (b[1] === "2") { act = "repeat"; }
node.send({ topic:"io/key", payload:Number(b[0]), action:act });
}
}
});
node.child.stderr.on('data', function (data) {
if (RED.settings.verbose) { node.log("err: "+data+" :"); }
});
node.child.on('close', function (code) {
node.running = false;
node.child = null;
if (RED.settings.verbose) { node.log(RED._("rdk-gpio.status.closed")); }
if (node.finished) {
node.status({fill:"grey",shape:"ring",text:"rdk-gpio.status.closed"});
node.finished();
}
else {
node.status({fill:"red",shape:"ring",text:"rdk-gpio.status.stopped"});
setTimeout(function() { doConnect(); },2000)
}
});
node.child.on('error', function (err) {
if (err.errno === "ENOENT") { node.error(RED._("rdk-gpio.errors.commandnotfound")); }
else if (err.errno === "EACCES") { node.error(RED._("rdk-gpio.errors.commandnotexecutable")); }
else { node.error(RED._("rdk-gpio.errors.error")+': ' + err.errno); }
});
}
if (allOK === true) {
doConnect();
node.on("close", function(done) {
node.status({});
if (node.child != null) {
node.finished = done;
var pids = [node.child.pid.toString()];
getChildPids(node.child.pid, pids);
execSync('sudo kill -9 ' + pids.join(' '));
// node.child.kill('SIGINT');
node.child = null;
}
else {
done(); }
});
}
else {
node.status({fill:"grey",shape:"dot",text:"rdk-gpio.status.not-available"});
}
}
RED.nodes.registerType("rdk-keyboard",IOKeyboardNode);
RED.httpAdmin.get('/rdk-pins/:id', RED.auth.needsPermission('rdk-gpio.read'), function(req,res) {
res.json(pinsInUse);
});
}