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297 lines
13 KiB
JavaScript
297 lines
13 KiB
JavaScript
'use strict';
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/*global chrome*/
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var serial = {
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connectionId: false,
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openRequested: false,
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openCanceled: false,
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bitrate: 0,
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bytesReceived: 0,
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bytesSent: 0,
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failed: 0,
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transmitting: false,
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outputBuffer: [],
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connect: function (path, options, callback) {
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var self = this;
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self.openRequested = true;
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chrome.serial.connect(path, options, function (connectionInfo) {
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if (chrome.runtime.lastError) {
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console.error(chrome.runtime.lastError.message);
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}
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if (connectionInfo && !self.openCanceled) {
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self.connectionId = connectionInfo.connectionId;
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self.bitrate = connectionInfo.bitrate;
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self.bytesReceived = 0;
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self.bytesSent = 0;
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self.failed = 0;
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self.openRequested = false;
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self.onReceive.addListener(function log_bytesReceived(info) {
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self.bytesReceived += info.data.byteLength;
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});
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self.onReceiveError.addListener(function watch_for_on_receive_errors(info) {
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console.error(info);
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googleAnalytics.sendException('Serial: ' + info.error, false);
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switch (info.error) {
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case 'system_error': // we might be able to recover from this one
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if (!self.failed++) {
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chrome.serial.setPaused(self.connectionId, false, function () {
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self.getInfo(function (info) {
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if (info) {
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if (!info.paused) {
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console.log('SERIAL: Connection recovered from last onReceiveError');
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googleAnalytics.sendException('Serial: onReceiveError - recovered', false);
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self.failed = 0;
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} else {
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console.log('SERIAL: Connection did not recover from last onReceiveError, disconnecting');
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GUI.log('Unrecoverable <span style="color: red">failure</span> of serial connection, disconnecting...');
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googleAnalytics.sendException('Serial: onReceiveError - unrecoverable', false);
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if (GUI.connected_to || GUI.connecting_to) {
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$('a.connect').click();
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} else {
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self.disconnect();
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}
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}
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} else {
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if (chrome.runtime.lastError) {
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console.error(chrome.runtime.lastError.message);
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}
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}
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});
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});
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}
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break;
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case 'break':
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// This occurs on F1 boards with old firmware during reboot
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case 'overrun':
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// wait 50 ms and attempt recovery
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self.error = info.error;
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setTimeout(function() {
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chrome.serial.setPaused(info.connectionId, false, function() {
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self.getInfo(function (info) {
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if (info) {
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if (info.paused) {
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// assume unrecoverable, disconnect
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console.log('SERIAL: Connection did not recover from ' + self.error + ' condition, disconnecting');
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GUI.log('Unrecoverable <span style="color: red">failure</span> of serial connection, disconnecting...');
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googleAnalytics.sendException('Serial: ' + self.error + ' - unrecoverable', false);
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if (GUI.connected_to || GUI.connecting_to) {
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$('a.connect').click();
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} else {
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self.disconnect();
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}
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}
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else {
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console.log('SERIAL: Connection recovered from ' + self.error + ' condition');
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googleAnalytics.sendException('Serial: ' + self.error + ' - recovered', false);
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}
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}
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});
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});
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}, 50);
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break;
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case 'timeout':
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// TODO
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break;
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case 'device_lost':
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if (GUI.connected_to || GUI.connecting_to) {
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$('a.connect').click();
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} else {
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self.disconnect();
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}
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break;
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case 'disconnected':
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// TODO
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break;
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}
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});
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console.log('SERIAL: Connection opened with ID: ' + connectionInfo.connectionId + ', Baud: ' + connectionInfo.bitrate);
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if (callback) callback(connectionInfo);
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} else if (connectionInfo && self.openCanceled) {
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// connection opened, but this connect sequence was canceled
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// we will disconnect without triggering any callbacks
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self.connectionId = connectionInfo.connectionId;
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console.log('SERIAL: Connection opened with ID: ' + connectionInfo.connectionId + ', but request was canceled, disconnecting');
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// some bluetooth dongles/dongle drivers really doesn't like to be closed instantly, adding a small delay
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setTimeout(function initialization() {
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self.openRequested = false;
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self.openCanceled = false;
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self.disconnect(function resetUI() {
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if (callback) callback(false);
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});
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}, 150);
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} else if (self.openCanceled) {
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// connection didn't open and sequence was canceled, so we will do nothing
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console.log('SERIAL: Connection didn\'t open and request was canceled');
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self.openRequested = false;
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self.openCanceled = false;
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if (callback) callback(false);
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} else {
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self.openRequested = false;
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console.log('SERIAL: Failed to open serial port');
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googleAnalytics.sendException('Serial: FailedToOpen', false);
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if (callback) callback(false);
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}
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});
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},
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disconnect: function (callback) {
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var self = this;
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if (self.connectionId) {
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self.emptyOutputBuffer();
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// remove listeners
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for (var i = (self.onReceive.listeners.length - 1); i >= 0; i--) {
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self.onReceive.removeListener(self.onReceive.listeners[i]);
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}
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for (var i = (self.onReceiveError.listeners.length - 1); i >= 0; i--) {
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self.onReceiveError.removeListener(self.onReceiveError.listeners[i]);
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}
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chrome.serial.disconnect(this.connectionId, function (result) {
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if (chrome.runtime.lastError) {
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console.error(chrome.runtime.lastError.message);
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}
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if (result) {
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console.log('SERIAL: Connection with ID: ' + self.connectionId + ' closed, Sent: ' + self.bytesSent + ' bytes, Received: ' + self.bytesReceived + ' bytes');
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} else {
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console.log('SERIAL: Failed to close connection with ID: ' + self.connectionId + ' closed, Sent: ' + self.bytesSent + ' bytes, Received: ' + self.bytesReceived + ' bytes');
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googleAnalytics.sendException('Serial: FailedToClose', false);
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}
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self.connectionId = false;
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self.bitrate = 0;
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if (callback) callback(result);
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});
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} else {
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// connection wasn't opened, so we won't try to close anything
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// instead we will rise canceled flag which will prevent connect from continueing further after being canceled
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self.openCanceled = true;
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}
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},
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getDevices: function (callback) {
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chrome.serial.getDevices(function (devices_array) {
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var devices = [];
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devices_array.forEach(function (device) {
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devices.push(device.path);
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});
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callback(devices);
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});
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},
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getInfo: function (callback) {
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chrome.serial.getInfo(this.connectionId, callback);
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},
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getControlSignals: function (callback) {
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chrome.serial.getControlSignals(this.connectionId, callback);
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},
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setControlSignals: function (signals, callback) {
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chrome.serial.setControlSignals(this.connectionId, signals, callback);
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},
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send: function (data, callback) {
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var self = this;
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this.outputBuffer.push({'data': data, 'callback': callback});
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function send() {
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// store inside separate variables in case array gets destroyed
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var data = self.outputBuffer[0].data,
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callback = self.outputBuffer[0].callback;
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chrome.serial.send(self.connectionId, data, function (sendInfo) {
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// track sent bytes for statistics
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self.bytesSent += sendInfo.bytesSent;
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// fire callback
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if (callback) callback(sendInfo);
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// remove data for current transmission form the buffer
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self.outputBuffer.shift();
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// if there is any data in the queue fire send immediately, otherwise stop trasmitting
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if (self.outputBuffer.length) {
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// keep the buffer withing reasonable limits
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if (self.outputBuffer.length > 100) {
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var counter = 0;
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while (self.outputBuffer.length > 100) {
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self.outputBuffer.pop();
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counter++;
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}
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console.log('SERIAL: Send buffer overflowing, dropped: ' + counter + ' entries');
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}
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send();
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} else {
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self.transmitting = false;
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}
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});
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}
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if (!this.transmitting) {
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this.transmitting = true;
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send();
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}
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},
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onReceive: {
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listeners: [],
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addListener: function (function_reference) {
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chrome.serial.onReceive.addListener(function_reference);
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this.listeners.push(function_reference);
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},
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removeListener: function (function_reference) {
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for (var i = (this.listeners.length - 1); i >= 0; i--) {
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if (this.listeners[i] == function_reference) {
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chrome.serial.onReceive.removeListener(function_reference);
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this.listeners.splice(i, 1);
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break;
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}
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}
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}
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},
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onReceiveError: {
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listeners: [],
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addListener: function (function_reference) {
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chrome.serial.onReceiveError.addListener(function_reference);
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this.listeners.push(function_reference);
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},
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removeListener: function (function_reference) {
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for (var i = (this.listeners.length - 1); i >= 0; i--) {
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if (this.listeners[i] == function_reference) {
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chrome.serial.onReceiveError.removeListener(function_reference);
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this.listeners.splice(i, 1);
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break;
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}
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}
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}
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},
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emptyOutputBuffer: function () {
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this.outputBuffer = [];
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this.transmitting = false;
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}
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}; |