-
Notifications
You must be signed in to change notification settings - Fork 592
/
neopixel.js
178 lines (164 loc) · 7.84 KB
/
neopixel.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
module.exports = function(RED) {
"use strict";
var spawn = require('child_process').spawn;
var execSync = require('child_process').execSync;
var fs = require('fs');
var colors = require('./colours.js');
var piCommand = __dirname+'/neopix';
var allOK = true;
try {
var cpuinfo = fs.readFileSync("/proc/cpuinfo").toString();
if (cpuinfo.indexOf(": BCM") === -1) {
RED.log.warn("rpi-neopixels : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
allOK = false;
}
else if (execSync(piCommand+" check").toString() !== "") {
RED.log.warn("rpi-neopixels : Can't find neopixel python library");
allOK = false;
}
else if (!(1 & parseInt ((fs.statSync(piCommand).mode & parseInt ("777", 8)).toString (8)[0]))) {
RED.log.warn("rpi-neopixels : "+RED._("node-red:rpi-gpio.errors.needtobeexecutable",{command:piCommand}));
allOK = false;
}
}
catch(err) {
RED.log.warn("rpi-neopixels : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
allOK = false;
}
// the magic to make python print stuff immediately
process.env.PYTHONUNBUFFERED = 1;
function PiNeopixelNode(n) {
RED.nodes.createNode(this,n);
this.pixels = n.pixels || 1;
this.bgnd = n.bgnd || "0,0,0";
this.fgnd = n.fgnd || "128,128,128";
this.mode = n.mode || "pcent";
this.rgb = n.rgb || "rgb";
this.gamma = n.gamma;
if (this.gamma === undefined) { this.gamma = true; }
this.gpio = n.gpio || 18;
this.channel = 0;
if (this.gpio == 13 || this.gpio == 19) { this.channel = 1; }
this.brightness = Number(n.brightness || 100);
this.wipe = Number(n.wipe || 40);
if (this.wipe < 0) { this.wipe = 0; }
if (this.brightness < 0) { this.brightness = 0; }
if (this.brightness > 100) { this.brightness = 100; }
var node = this;
var needle = "255,255,255";
//var p1 = /^\#[A-Fa-f0-9]{6}$/
var p2 = /^[0-9]+,[0-9]+,[0-9]+$/
var p3 = /^[0-9]+,[0-9]+,[0-9]+,[0-9]+$/
var p4 = /^[0-9]+,[0-9]+,[0-9]+,[0-9]+,[0-9]+$/
function inputlistener(msg) {
if (msg.hasOwnProperty("brightness")) {
node.child.stdin.write("brightness,"+msg.brightness.toString()+"\n");
}
if (msg.hasOwnProperty("payload")) {
var pay = msg.payload.toString().toUpperCase();
var parts = pay.split(",");
if (parts.length <= 2) {
if (parts.length === 2) { // it's a colour and length
if (isNaN(parseInt(parts[1]))) { parts = parts.reverse(); }
if (colors.getRGB(parts[0],node.rgb)) {
var l = parts[1];
if (node.mode.indexOf("pcent") >= 0) { l = parseInt(l / 100 * node.pixels + 0.5); }
l = l - 1;
if (node.mode.indexOf("need") >= 0) {
needle = colors.getRGB(parts[0],node.rgb);
pay = "0,"+(l-1)+","+node.fgnd+"\n"+l+","+needle+"\n"+(l+1)+","+(node.pixels-1)+","+node.bgnd;
}
else {
node.fgnd = colors.getRGB(parts[0],node.rgb);
pay = "0,"+l+","+node.fgnd+"\n"+(l+1)+","+(node.pixels-1)+","+node.bgnd;
}
}
else { node.warn("Invalid colour : "+pay); return; }
}
else {
if (isNaN(pay)) { // it's a single colour word so set background
if (colors.getRGB(pay,node.rgb)) {
node.bgnd = colors.getRGB(pay,node.rgb);
pay = node.bgnd;
}
else { node.warn("Invalid payload : "+pay); return; }
}
else { // it's a single number so just draw bar
var ll = pay;
if (node.mode.indexOf("pcent") >= 0) { ll = parseInt(ll / 100 * node.pixels + 0.5); }
ll = ll - 1;
if (node.mode.indexOf("need") >= 0) {
pay = "0,"+(ll-1)+","+node.fgnd+"\n"+ll+","+needle+"\n"+(ll+1)+","+(node.pixels-1)+","+node.bgnd;
}
else {
pay = "0,"+ll+","+node.fgnd+"\n"+(ll+1)+","+(node.pixels-1)+","+node.bgnd;
}
}
}
node.child.stdin.write(pay+"\n");
return;
}
if ( p2.test(pay) || p3.test(pay) || p4.test(pay) ) {
if ((parts.length > 2) && (node.rgb === "grb")) { // swap r and g values
var tmp = parts[parts.length-3];
parts[parts.length-3] = parts[parts.length-2];
parts[parts.length-2] = tmp;
}
if (parts.length === 3) { node.bgnd = parts.join(","); }
node.child.stdin.write(parts.join(",")+"\n"); // handle 3 parts, 4 part and 5 parts in the python
}
else { node.warn("Invalid payload : "+pay); }
}
}
if (allOK === true) {
node.child = spawn(piCommand, [node.pixels, node.wipe, node.mode, node.brightness, node.gamma, node.channel, node.gpio]);
node.status({fill:"green",shape:"dot",text:"ok"});
node.on("input", inputlistener);
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.on('close', function () {
node.child = null;
if (RED.settings.verbose) { node.log(RED._("rpi-gpio.status.closed")); }
if (node.finished) {
node.status({fill:"grey",shape:"ring",text:"closed"});
node.finished();
}
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.child != null) {
node.finished = done;
node.child.kill('SIGKILL');
}
else { done(); }
});
if (node.bgnd) {
if (node.bgnd.split(',').length === 1) {
node.bgnd = colors.getRGB(node.bgnd,node.rgb);
}
if (node.mode.indexOf("shift") === -1) {
node.child.stdin.write(node.bgnd+"\n");
}
}
if (node.fgnd) {
if (node.fgnd.split(',').length === 1) {
node.fgnd = colors.getRGB(node.fgnd,node.rgb);
}
}
}
else {
node.status({fill:"grey",shape:"dot",text:"node-red:rpi-gpio.status.not-available"});
}
}
RED.nodes.registerType("rpi-neopixels",PiNeopixelNode);
}