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@rmurphey
Created July 27, 2012 00:27
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shiftOut in javascript
var five = require("johnny-five"),
board;
board = new five.Board();
board.on("ready", function() {
(new five.Led(13)).on();
var dataPin = 2;
var clockPin = 3;
var latchPin = 4;
var value = 0;
next(value);
function next(i) {
board.digitalWrite(latchPin, board.firmata.LOW);
shiftOut(dataPin, clockPin, i);
board.digitalWrite(latchPin, board.firmata.HIGH);
if (++i > 255) {
return;
}
setTimeout(function() {
next(i);
}, 500);
}
function shiftOut(dataPin, clockPin, value) {
// much thanks to http://www.sqlskills.com/blogs/paulselec/post/Arduino-figuring-out-shift-registers.aspx
for (var mask = 128; mask > 0; mask = mask >> 1) {
board.digitalWrite(clockPin, board.firmata.LOW);
board.digitalWrite(
dataPin, board.firmata[ value & mask ? 'HIGH' : 'LOW' ]
);
board.digitalWrite(clockPin, board.firmata.HIGH)
}
}
});
@shiawuen
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Here is my quick hack to control on-off LEDs with Express + Socket.IO + Johnny Five

https://plus.google.com/102455075182037186148/posts/JkbhQG8Mrkg (video)

@rwaldron
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Nice!

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