node-poweredup/src/devices/basicmotor.ts
Nathan Kellenicki 705fbd341a
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writeDirect function on device
2019-12-19 10:46:38 -08:00

42 lines
1.1 KiB
TypeScript

import { Device } from "./device";
import { IDeviceInterface } from "../interfaces";
import * as Consts from "../consts";
import { mapSpeed } from "../utils";
export class BasicMotor extends Device {
constructor (hub: IDeviceInterface, portId: number, modeMap: {[event: string]: number}, type: Consts.DeviceType = Consts.DeviceType.UNKNOWN) {
super(hub, portId, modeMap, type);
}
/**
* Set the motor speed.
* @method BasicMotor#power
* @param {number} power For forward, a value between 1 - 100 should be set. For reverse, a value between -1 to -100. Stop is 0.
* @returns {Promise} Resolved upon successful completion of command.
*/
public setPower (power: number) {
return new Promise((resolve) => {
this.writeDirect(0x00, Buffer.from([mapSpeed(power)]));
return resolve();
});
}
/**
* Fully (hard) stop the motor.
* @method BasicMotor#brake
* @returns {Promise} Resolved upon successful completion of command.
*/
public brake () {
return this.setPower(127);
}
}