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ianjorgensen/usb.js

Last active August 29, 2015 14:07
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usb.js
/*<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<script type="text/javascript" src="file:///android_asset/js/lib/jquery-1.9.1.js"></script>
<!-- Required includes. json2.js may not be required in specific instances. -->
<script type="text/javascript" src="file:///android_asset/js/lib/jockey.js"></script>
<script type="text/javascript" src="file:///android_asset/js/lib/guid.js"></script>
<script type="text/javascript" src="file:///android_asset/js/lib/common.min.js"></script>
<script type="text/javascript" src="file:///android_asset/js/usb.js"></script>
<script type="text/javascript" src="file:///android_asset/js/app.js"></script>
</head>
<body>
</body>
</html>*/
/*app.js*/
var usb = Usb();
Jockey.on('send-opcode', function() {
common.step([
function(next) {
usb.open(next);
},
function(data, next) {
usb.write('0x04,0x00', next);
},
function(data, next) {
Jockey.send('message', {message: data});
}
],
function(err) {
Jockey.send('message', {message: 'error: ' + data});
});
});
/*lib/guid.js*/
var guid = (function() {
function s4() {
return Math.floor((1 + Math.random()) * 0x10000)
.toString(16)
.substring(1);
}
return function() {
return s4() + s4() + '-' + s4() + '-' + s4() + '-' +
s4() + '-' + s4() + s4() + s4();
};
})();
/*lib/usb.js*/
var Usb = function(options) {
var uuid = guid();
return {
open: function(callback) {
var eventHandlerId = 'openComplete-' + uuid;
Jockey.on(eventHandlerId, function(response) {
Jockey.off(eventHandlerId);
response = JSON.parse(response);
callback(response.err);
});
Jockey.send('open', {eventHandlerId: eventHandlerId});
},
write: function(message, callback) {
var eventHandlerId = 'writeComplete-' + uuid;
Jockey.on(eventHandlerId, function(response) {
Jockey.off(eventHandlerId);
response = JSON.parse(response);
callback(response.err);
});
Jockey.send('write', {eventHandlerId: eventHandlerId, message: message});
},
read: function(callback) {
var eventHandlerId = 'readComplete-' + uuid;
Jockey.on(eventHandlerId, function(response) {
Jockey.off(eventHandlerId);
response = JSON.parse(response);
callback(response.err, response.data);
});
Jockey.send('read', {eventHandlerId: eventHandlerId});
}
}
};
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