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First pass at buffering incoming data until a complete message has arrived

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This commit is contained in:
Nathan Kunicki 2018-06-28 17:18:16 +01:00
parent ed515d6ec0
commit c6395e109b
1 changed files with 49 additions and 20 deletions
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69
lpf2hub.ts
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@ -25,6 +25,9 @@ export class LPF2Hub extends Hub {
private _lastTiltX: number = 0;
private _lastTiltY: number = 0;
private _incomingData: Buffer = Buffer.alloc(0);
private _outgoingData: Buffer = Buffer.alloc(0);
constructor (peripheral: Peripheral, autoSubscribe: boolean = true) {
super(peripheral, autoSubscribe);
@ -184,29 +187,49 @@ export class LPF2Hub extends Hub {
}
private _parseMessage (data: Buffer) {
private _parseMessage (data?: Buffer) {
switch (data[2]) {
case 0x01:
{
this._parseDeviceInfo(data);
break;
if (data) {
this._incomingData = Buffer.concat([this._incomingData, data]);
}
if (this._incomingData.length <= 0) {
return;
}
const len = this._incomingData[0];
if (len >= this._incomingData.length) {
const message = this._incomingData.slice(0, len);
this._incomingData = this._incomingData.slice(len);
switch (message[2]) {
case 0x01:
{
this._parseDeviceInfo(message);
break;
}
case 0x04:
{
this._parsePortMessage(message);
break;
}
case 0x45:
{
this._parseSensorMessage(message);
break;
}
case 0x82:
{
this._parsePortAction(message);
break;
}
}
case 0x04:
{
this._parsePortMessage(data);
break;
}
case 0x45:
{
this._parseSensorMessage(data);
break;
}
case 0x82:
{
this._parsePortAction(data);
break;
if (this._incomingData.length > 0) {
this._parseMessage();
}
}
}
@ -341,6 +364,12 @@ export class LPF2Hub extends Hub {
this.emit("rotate", port.id, rotation);
break;
}
case Consts.Devices.BOOST_MOVE_HUB_MOTOR:
{
const rotation = data.readInt32LE(2);
this.emit("rotate", port.id, rotation);
break;
}
case Consts.Devices.BOOST_TILT:
{
const tiltX = data[4] > 160 ? data[4] - 255 : data[4];