120 lines
3.6 KiB
Plaintext
120 lines
3.6 KiB
Plaintext
// 导入USB接口api包。
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import usb from '@ohos.usbManager';
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import { UsbTag } from '../config';
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import { StringToBytes } from './Common';
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//plc数据转成无锡科研所usb字节数据
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function plcStrToWXCodeArr(wuXiDataStr: string) {
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// const arr = stringToArr(wuXiDataStr);
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const arr = StringToBytes(wuXiDataStr);
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// 数据包总长度和有效长度
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const maxDataSize: number = 63;
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// 存储所有数据包的数组
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const packetArr: number[][] = [];
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// 计算需要的数据包数量
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const loop: number = Math.ceil(arr.length / maxDataSize);
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for (let i = 0; i < loop; i++) {
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// 截取当前数据包的数据
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const thisPacket: number[] = Array.from(arr.slice(i * maxDataSize, (i + 1) * maxDataSize));
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// 计算需要补齐的长度
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const oSize: number = maxDataSize - thisPacket.length;
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// 创建当前数据包
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const packet: number[] = [thisPacket.length, ...thisPacket];
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// 如果需要补齐，则填充 0x00
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if (oSize > 0) {
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packet.push(...new Array(oSize).fill(0x00));
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}
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// 将当前数据包添加到结果数组中
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packetArr.push(packet);
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}
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return packetArr;
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}
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export default class UsbService {
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public isWXUSBDevice: Boolean
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private devicepipe?: usb.USBDevicePipe
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private outEndpoint?: usb.USBEndpoint
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sendUSB = async (wuXiDataStr: string) => {
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console.info(UsbTag, '正在发送数据')
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console.info(UsbTag, '正在发送数据')
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if (this.isWXUSBDevice) {
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console.info(UsbTag, wuXiDataStr)
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const codeArr = plcStrToWXCodeArr(wuXiDataStr);
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for (let i = 0; i < codeArr.length; i++) {
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try {
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console.info(UsbTag, '正在发送数据')
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const f = await usb.bulkTransfer(this.devicepipe, this.outEndpoint, new Uint8Array(codeArr[i]))
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console.info(UsbTag, '发送成功数据长度为：' + f)
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} catch (e) {
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console.info(UsbTag, JSON.stringify(e))
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}
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}
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} else {
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console.info(UsbTag, 'usb设备初始化失败')
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}
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}
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init = async () => {
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// 获取设备列表。
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let deviceList: Array<usb.USBDevice> = usb.getDevices();
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deviceList.forEach(async (device: usb.USBDevice) => {
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console.log(UsbTag, JSON.stringify(device));
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//无锡所检测设备接入
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if (device.vendorId === 6790 && device.productId === 58409) {
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// if(vendorId === 2385 && productId === 5734){
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// 申请操作指定的device的操作权限。
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try {
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let bool = usb.hasRight(device.name);
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console.info(UsbTag, 'bool =>' + bool)
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const isExit = await usb.requestRight(device.name);
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console.info(UsbTag, 'isExit =>' + isExit)
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if (isExit) {
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let devicepipe: usb.USBDevicePipe = usb.connectDevice(device);
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let interfaces = device.configs[0].interfaces[0];
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let ret = usb.claimInterface(devicepipe, interfaces, true);
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console.info(UsbTag, 'ret =>' + ret);
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if (ret === 0) {
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let outEndpoint: usb.USBEndpoint = interfaces.endpoints[1];
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this.isWXUSBDevice = true;
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this.devicepipe = devicepipe
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this.outEndpoint = outEndpoint
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} else {
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console.info(UsbTag, 'usb claimInterface failed')
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}
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} else {
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console.info(UsbTag, 'isExit =>' + 'false')
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}
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} catch (e) {
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console.info(UsbTag, 'e=>' + JSON.stringify(e))
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}
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}
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});
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}
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constructor() {
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//是否是无锡检测设备
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this.isWXUSBDevice = false
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// this.devicepipe
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this.init()
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}
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}
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// export default initUsbServicesFn
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