lib/web/src/commands/driving.ts
import { combineFlags } from '../utils';
import {
CommandGenerator,
DeviceId,
DriveFlag,
DrivingCommandIds,
ICommandWithRaw
} from './types';
const encodeNumberLM = (n: number) => {
const absN = Math.abs(n * 3968);
const nFirstHalfByte1 = n === 0 ? 0 : n > 0 ? 0x30 : 0xb0;
// tslint:disable-next-line:no-bitwise
const nSecondHalfByte1 = (absN >> 8) & 0x0f;
return [
// tslint:disable-next-line:no-bitwise
nFirstHalfByte1 | nSecondHalfByte1,
// tslint:disable-next-line:no-bitwise
absN & 0xff,
// tslint:disable-next-line:no-bitwise
(0 >> 8) & 0xff,
// tslint:disable-next-line:no-bitwise
0 & 0xff
];
};
export default (generator: CommandGenerator) => {
const encode = generator(DeviceId.driving);
return {
drive: (
speed: number,
heading: number,
flags: DriveFlag[]
): ICommandWithRaw =>
encode({
commandId: DrivingCommandIds.driveWithHeading,
targetId: 0x12,
payload: [
speed,
// tslint:disable-next-line:no-bitwise
(heading >> 8) & 0xff,
// tslint:disable-next-line:no-bitwise
heading & 0xff,
combineFlags(flags)
]
}),
driveAsRc: (heading: number, speed: number): ICommandWithRaw =>
encode({
// Value: 8d 08 16 02 8b bf 72 93 de 00 00 00 00 b2 d8
commandId: DrivingCommandIds.driveAsRc,
payload: [...encodeNumberLM(heading), ...encodeNumberLM(speed)]
})
};
};