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Allow a bunch of Pi nodes to be visible but not active when used not on a Pi

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This commit is contained in:
Dave Conway-Jones
2018-04-15 11:24:56 +01:00
parent ace67b0154
commit acc2dc1a14
15 changed files with 428 additions and 355 deletions
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2
hardware/unicorn/package.json
View File

@@ -1,6 +1,6 @@
{
"name" : "node-red-node-pi-unicorn-hat",
"version" : "0.0.16",
"version" : "0.0.17",
"description" : "A Node-RED node to output to a Raspberry Pi Unicorn HAT from Pimorini.",
"dependencies" : {
"pngjs": "2.2.*"

113
hardware/unicorn/unicorn.js
View File

@@ -7,20 +7,26 @@ module.exports = function(RED) {
var execSync = require('child_process').execSync;
var hatCommand = __dirname+'/unihat';
var allOK = true;
if (!fs.existsSync("/dev/ttyAMA0")) { // unlikely if not on a Pi
//RED.log.info(RED._("rpi-gpio.errors.ignorenode"));
throw "Info : "+RED._("rpi-gpio.errors.ignorenode");
try {
var cpuinfo = fs.readFileSync("/proc/cpuinfo").toString();
if (cpuinfo.indexOf(": BCM") === -1) {
RED.log.warn("rpi-unicorn : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
allOK = false;
}
else if (!fs.existsSync("/usr/share/doc/python-rpi.gpio")) {
RED.log.warn("rpi-unicorn : "+RED._("node-red:rpi-gpio.errors.libnotfound"));
allOK = false;
}
else if (!(1 & parseInt ((fs.statSync(gpioCommand).mode & parseInt ("777", 8)).toString (8)[0]))) {
RED.log.warn("rpi-unicorn : "+RED._("node-red:rpi-gpio.errors.needtobeexecutable",{command:hatCommand}));
allOK = false;
}
}
if (execSync('python -c "import neopixel"').toString() !== "") {
RED.log.warn("Can't find neopixel python library");
throw "Warning : Can't find neopixel python library";
}
if ( !(1 & parseInt ((fs.statSync(hatCommand).mode & parseInt ("777", 8)).toString (8)[0]) )) {
RED.log.error(hatCommand + " command is not executable");
throw "Error : "+RED._("rpi-gpio.errors.mustbeexecutable");
catch(err) {
RED.log.warn("rpi-unicorn : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
allOK = false;
}
// the magic to make python print stuff immediately
@@ -208,52 +214,57 @@ module.exports = function(RED) {
else { node.warn("Input not a string"); }
}
node.child = spawn(hatCommand, [node.bright]);
node.status({fill:"green",shape:"dot",text:"ok"});
if (allOK === true) {
node.child = spawn(hatCommand, [node.bright]);
node.status({fill:"green",shape:"dot",text:"ok"});
node.on("input", inputlistener);
node.on("input", inputlistener);
node.child.stdout.on('data', function (data) {
if (RED.settings.verbose) { node.log("out: "+data+" :"); }
});
node.child.stdout.on('data', function (data) {
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.stderr.on('data', function (data) {
if (RED.settings.verbose) { node.log("err: "+data+" :"); }
});
node.child.on('close', function () {
node.child = null;
if (RED.settings.verbose) { node.log(RED._("rpi-gpio.status.closed")); }
if (node.done) {
node.child.on('close', function () {
node.child = null;
if (RED.settings.verbose) { node.log(RED._("rpi-gpio.status.closed")); }
if (node.done) {
node.status({fill:"grey",shape:"ring",text:"closed"});
node.done();
}
else { node.status({fill:"red",shape:"ring",text:"stopped"}); }
});
node.child.on('error', function (err) {
if (err.errno === "ENOENT") { node.error(RED._("rpi-gpio.errors.commandnotfound")); }
else if (err.errno === "EACCES") { node.error(RED._("rpi-gpio.errors.commandnotexecutable")); }
else { node.error(RED._("rpi-gpio.errors.error")+': ' + err.errno); }
});
node.on("close", function(done) {
node.status({fill:"grey",shape:"ring",text:"closed"});
node.done();
if (node.tout) { clearTimeout(node.tout); }
if (node.child != null) {
node.done = done;
node.child.kill('SIGKILL');
}
else { done(); }
});
var nowready = function() {
node.tout = setTimeout( function() {
if (ready) { inputlistener({payload:"0"}); }
else { nowready(); }
}, 100);
}
else { node.status({fill:"red",shape:"ring",text:"stopped"}); }
});
node.child.on('error', function (err) {
if (err.errno === "ENOENT") { node.error(RED._("rpi-gpio.errors.commandnotfound")); }
else if (err.errno === "EACCES") { node.error(RED._("rpi-gpio.errors.commandnotexecutable")); }
else { node.error(RED._("rpi-gpio.errors.error")+': ' + err.errno); }
});
node.on("close", function(done) {
node.status({fill:"grey",shape:"ring",text:"closed"});
if (node.tout) { clearTimeout(node.tout); }
if (node.child != null) {
node.done = done;
node.child.kill('SIGKILL');
}
else { done(); }
});
var nowready = function() {
node.tout = setTimeout( function() {
if (ready) { inputlistener({payload:"0"}); }
else { nowready(); }
}, 100);
nowready();
}
else {
node.status({fill:"grey",shape:"dot",text:"node-red:rpi-gpio.status.not-available"});
}
nowready();
}
RED.nodes.registerType("rpi-unicorn",UnicornHatNode);
}