betaflight-configurator/js/serial.js

166 lines
5.7 KiB
JavaScript

var serial = {
connectionId: -1,
bitrate: 0,
bytes_received: 0,
bytes_sent: 0,
transmitting: false,
output_buffer: [],
connect: function(path, options, callback) {
var self = this;
chrome.serial.connect(path, options, function(connectionInfo) {
if (connectionInfo !== undefined) {
self.connectionId = connectionInfo.connectionId;
self.bitrate = connectionInfo.bitrate;
self.bytes_received = 0;
self.bytes_sent = 0;
self.onReceive.addListener(function log_bytes_received(info) {
self.bytes_received += info.data.byteLength;
});
self.onReceiveError.addListener(function watch_for_on_receive_errors(info) {
console.error(info);
// valid conditions are 'disconnected', 'timeout', 'device_lost', 'system_error'
if (info.error == 'system_error') {
// we might be able to recover from this one
chrome.serial.setPaused(self.connectionId, false, function() {
console.log('SERIAL: Connection unpause after onReceiveError triggered');
});
}
});
console.log('SERIAL: Connection opened with ID: ' + connectionInfo.connectionId + ', Baud: ' + connectionInfo.bitrate);
callback(connectionInfo);
} else {
console.log('SERIAL: Failed to open serial port');
callback(false);
}
});
},
disconnect: function(callback) {
var self = this;
self.empty_output_buffer();
// remove listeners
for (var i = (self.onReceive.listeners.length - 1); i >= 0; i--) {
self.onReceive.removeListener(self.onReceive.listeners[i]);
}
for (var i = (self.onReceiveError.listeners.length - 1); i >= 0; i--) {
self.onReceiveError.removeListener(self.onReceiveError.listeners[i]);
}
chrome.serial.disconnect(this.connectionId, function(result) {
if (result) {
console.log('SERIAL: Connection with ID: ' + self.connectionId + ' closed');
} else {
console.log('SERIAL: Failed to close connection with ID: ' + self.connectionId + ' closed');
}
console.log('SERIAL: Statistics - Sent: ' + self.bytes_sent + ' bytes, Received: ' + self.bytes_received + ' bytes');
self.connectionId = -1;
self.bitrate = 0;
callback(result);
});
},
getDevices: function(callback) {
chrome.serial.getDevices(function(devices_array) {
var devices = [];
devices_array.forEach(function(device) {
devices.push(device.path);
});
callback(devices);
});
},
setControlSignals: function(signals, callback) {
chrome.serial.setControlSignals(this.connectionId, signals, callback);
},
getControlSignals: function(callback) {
chrome.serial.getControlSignals(this.connectionId, callback);
},
send: function(data, callback) {
var self = this;
self.output_buffer.push({'data': data, 'callback': callback});
if (!self.transmitting) {
self.transmitting = true;
function sending() {
// store inside separate variables in case array gets destroyed
var data = self.output_buffer[0].data;
var callback = self.output_buffer[0].callback;
chrome.serial.send(self.connectionId, data, function(sendInfo) {
callback(sendInfo);
self.output_buffer.shift();
self.bytes_sent += sendInfo.bytesSent;
if (self.output_buffer.length) {
// keep the buffer withing reasonable limits
while (self.output_buffer.length > 500) {
self.output_buffer.pop();
}
sending();
} else {
self.transmitting = false;
}
});
};
sending();
}
},
onReceive: {
listeners: [],
addListener: function(function_reference) {
var listener = chrome.serial.onReceive.addListener(function_reference);
this.listeners.push(function_reference);
},
removeListener: function(function_reference) {
for (var i = (this.listeners.length - 1); i >= 0; i--) {
if (this.listeners[i] == function_reference) {
chrome.serial.onReceive.removeListener(function_reference);
this.listeners.splice(i, 1);
break;
}
}
}
},
onReceiveError: {
listeners: [],
addListener: function(function_reference) {
var listener = chrome.serial.onReceiveError.addListener(function_reference);
this.listeners.push(function_reference);
},
removeListener: function(function_reference) {
for (var i = (this.listeners.length - 1); i >= 0; i--) {
if (this.listeners[i] == function_reference) {
chrome.serial.onReceiveError.removeListener(function_reference);
this.listeners.splice(i, 1);
break;
}
}
}
},
empty_output_buffer: function() {
this.output_buffer = [];
this.transmitting = false;
}
};