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Code Issues Wiki Activity

improving the async transmission part in serial layer

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This commit is contained in:
cTn 2014-09-13 15:01:32 +02:00
parent 4b96bb39b5
commit 25edf3a4bf
1 changed files with 23 additions and 11 deletions
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34
js/serial.js
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@ -129,36 +129,48 @@ var serial = {
},
send: function (data, callback) {
var self = this;
self.output_buffer.push({'data': data, 'callback': callback});
this.output_buffer.push({'data': data, 'callback': callback});
if (!self.transmitting) {
self.transmitting = true;
if (!this.transmitting) {
this.transmitting = true;
var sending = function () {
var send = function () {
// store inside separate variables in case array gets destroyed
var data = self.output_buffer[0].data,
callback = self.output_buffer[0].callback;
chrome.serial.send(self.connectionId, data, function (sendInfo) {
callback(sendInfo);
self.output_buffer.shift();
// track sent bytes for statistics
self.bytes_sent += sendInfo.bytesSent;
// fire callback
callback(sendInfo);
// remove data for current transmission form the buffer
self.output_buffer.shift();
// if there is any data in the queue fire send immediately, otherwise stop trasmitting
if (self.output_buffer.length) {
// keep the buffer withing reasonable limits
while (self.output_buffer.length > 500) {
self.output_buffer.pop();
if (self.output_buffer.length > 100) {
var counter = 0;
while (self.output_buffer.length > 100) {
self.output_buffer.pop();
counter++;
}
console.log('SERIAL: Send buffer overflowing, dropped: ' + counter + ' entries');
}
sending();
send();
} else {
self.transmitting = false;
}
});
};
sending();
send();
}
},
onReceive: {