Fix node-hid requirement

Author: thegecko

README.md

@@ -134,7 +134,8 @@ const DAPjs = require('dapjs');
 let devices = hid.devices();
 devices = devices.filter(device => device.vendorId === 0xD28);
 
-const transport = new DAPjs.HID(devices[0]);
+const device = new hid.HID(devices[0].path);
+const transport = new DAPjs.HID(device);
 const daplink = new DAPjs.DAPLink(transport);
 
 try {

examples/daplink-flash/hid.js

@@ -39,7 +39,8 @@ const getDevices = (vendorID) => {
     try {
         const program = await common.getFile();
         const devices = getDevices(common.DAPLINK_VENDOR);
-        const device = await common.selectDevice(devices);
+        const selected = await common.selectDevice(devices);
+        const device = new hid.HID(selected.path);
         const transport = new DAPjs.HID(device);
         await common.flash(transport, program);
     } catch(error) {

examples/daplink-serial/hid.js

@@ -38,7 +38,8 @@ const getDevices = (vendorID) => {
 (async () => {
     try {
         const devices = getDevices(common.DAPLINK_VENDOR);
-        const device = await common.selectDevice(devices);
+        const selected = await common.selectDevice(devices);
+        const device = new hid.HID(selected.path);
         const transport = new DAPjs.HID(device);
         await common.listen(transport);
     } catch(error) {

examples/execute/hid.js

@@ -40,7 +40,8 @@ const getDevices = (vendorID) => {
 (async () => {
     try {
         const devices = getDevices(common.DAPLINK_VENDOR);
-        const device = await common.selectDevice(devices);
+        const selected = await common.selectDevice(devices);
+        const device = new hid.HID(selected.path);
         const transport = new DAPjs.HID(device);
 
         const deviceHash = await common.deviceHash(transport, DATA);

examples/read-registers/hid.js

@@ -38,7 +38,8 @@ const getDevices = (vendorID) => {
 (async () => {
     try {
         const devices = getDevices(common.DAPLINK_VENDOR);
-        const device = await common.selectDevice(devices);
+        const selected = await common.selectDevice(devices);
+        const device = new hid.HID(selected.path);
         const transport = new DAPjs.HID(device);
         await common.readRegisters(transport);
     } catch(error) {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "dapjs",
-  "version": "2.1.0",
+  "version": "2.2.0",
   "description": "JavaScript interface to on-chip debugger (CMSIS-DAP)",
   "homepage": "https://github.com/ARMmbed/dapjs",
   "license": "MIT",

src/transport/hid.ts

@@ -22,7 +22,7 @@
 */
 
 import { platform } from 'os';
-import type { HID as nodeHID, Device } from 'node-hid';
+import type { HID as nodeHID } from 'node-hid';
 import { Transport } from './';
 
 /**
@@ -31,54 +31,36 @@ import { Transport } from './';
 export class HID implements Transport {
 
     private os: string = platform();
-    private path: string;
-    private device?: nodeHID;
     public readonly packetSize = 64;
 
     /**
      * HID constructor
      * @param path Path to HID device to use
      */
-    constructor(deviceOrPath: Device | string) {
-        const isDevice = (source: Device | string): source is Device => {
-            return (source as Device).path !== undefined;
-        };
-
-        this.path = isDevice(deviceOrPath) ? deviceOrPath.path! : deviceOrPath;
+    constructor(private device: nodeHID) {
     }
 
     /**
      * Open device
      * @returns Promise
      */
     public async open(): Promise<void> {
-        if (!this.path.length) {
-            throw new Error('No path specified');
-        }
-
-        const hid = require('node-hid');
-        this.device = new hid.HID(this.path);
+        return;
     }
 
     /**
      * Close device
      * @returns Promise
      */
     public async close(): Promise<void> {
-        if (this.device) {
-            this.device.close();
-        }
+        this.device.close();
     }
 
     /**
      * Read from device
      * @returns Promise of DataView
      */
     public async read(): Promise<DataView> {
-        if (!this.device) {
-            throw new Error('No device opened');
-        }
-
         const array = await new Promise<number[]>((resolve, reject) => {
             this.device!.read((error: string, data: number[]) => {
                 if (error) {
@@ -99,10 +81,6 @@ export class HID implements Transport {
      * @returns Promise
      */
     public async write(data: BufferSource): Promise<void> {
-        if (!this.device) {
-            throw new Error('No device opened');
-        }
-
         const isView = (source: ArrayBuffer | ArrayBufferView): source is ArrayBufferView => {
             return (source as ArrayBufferView).buffer !== undefined;
         };