YKJC-V3.0-UNI/mixins/linkUSB.js

var UsbSerial = uni.requireNativePlugin('Zhimi-UsbSerial');
export default {
	data() {
		return {
			setInterTimeUSB: null,
			vendorId: '',
			port: '',
			usbDevicesComPortsList: [] // 串口名称数组
		}
	},
	destroyed() {
		console.log('销毁页面');
		clearInterval(this.setInterTimeUSB)
	},
	methods: {
		// 检测USB是否连接状态
		usbStatus() {
			clearInterval(this.setInterTimeUSB)
			this.setInterTimeUSB = setInterval(() => {
				this.connectUSB('open')
			}, 5000)
		},
		// 设置USB数据回调
		connectUSB(flag, callback) {
			console.log('UsbSerial', UsbSerial)
			//设置数据回调
			UsbSerial.setDataCallback((res) => {
				console.log('设置USB数据回调-res', res)
				if (res.type == "onUsbDeviceAttached") { //usb插上
					console.log('USB已插入');
					var data = {
						command: 'comStatusChanged',
						data: {
							state: 0,
							message: 'USB已插入'
						}
					}
					this.webViewToH5(data)
				} else if (res.type == "onUsbDeviceDetached") { //usb断开
					console.log('USB已拔出');
					var data = {
						command: 'comStatusChanged',
						data: {
							state: 0,
							message: 'USB已拔出'
						}
					}
					this.webViewToH5(data)
				} else if (res.type === 'startUpdateValue') {
					console.log('正在接受数据中,请稍等...');
				} else if (res.type == "onNewData") { //数据回调
					var data = res.data.data; //字节数组
					var str = res.data.string; //字符串
					var hex = res.data.hex; //十六进制
					// console.log('字节数组',data)
					// console.log('字符串',str)
					console.log('hex', hex)
					// 68656c6c6f20776f726c64---hello world
					console.log('this.hexCharCodeToStr(hex)', JSON.stringify(this.hexCharCodeToStr(hex)));

					var data = {
						command: 'examineData',
						commandType: 'USB',
						data: {
							state: 0,
							message: JSON.stringify(this.hexCharCodeToStr(hex))
						}
					}
					this.webViewToH5(data)
				} else if (res.type == "onRunError") {
					//点击关闭USB 
					var data = {
						command: 'comStatusChanged',
						data: {
							state: 0,
							message: 'USBRunError'
						}
					}
					this.webViewToH5(data)
				}
			});
			//UsbSerial.setReceiveTime（type,time） 参数：
			// type （0 1 2）0直接返回，字节太长会被分包； 1固定间隔time返回拼接的数据； 2拼接数据，没接收到数据间隔time后返回
			// time （毫秒）
			UsbSerial.setReceiveTime(2, 500)
			//获取usb列表
			UsbSerial.getUsbDevices((usbDevices) => {
				console.log('获取usb列表-usbDevices', usbDevices)
				//选择usb列表
				if (usbDevices.length > 0) {
					this.usbDevicesComPortsList = usbDevices.map(item => item.device.vendorId)
					if (flag === 'NoOpen') {
						callback() 
					} else {
						// console.log('this.cgConfigInfo.data.portName',this.cgConfigInfo.data.portName);
						// console.log('usbDevices[0].device.vendorId',usbDevices[0].device.vendorId);
						let usbDevice = usbDevices.filter(item => item.device.vendorId == this.cgConfigInfo.data.portName)
						console.log('usbDevice',usbDevice);
						if (usbDevice.length > 0) {
							this.vendorId = usbDevice[0].device.vendorId
							this.port = usbDevice[0].ports[0]
							this.openUSB()
						}
					}
				} else {
					this.usbDevicesComPortsList = []
					flag === 'NoOpen' ? callback() : ''
				}
			});
		},
		// 打开USB
		openUSB() {
			let vueDetailData = this.cgConfigInfo.data
			console.log('打开USB', this.vendorId)
			//检查授权Usb权限
			UsbSerial.grantUsbPermission(this.vendorId, (res) => {
				console.log('检查授权Usb权限', res)
				if (res == true) {
					//打开usb连接
					UsbSerial.open(this.vendorId, this.port, (ret) => {
						console.log('打开usb连接', ret)
						if (ret == true) {
							//设置参数
							UsbSerial.setParameters(vueDetailData.baudRate, vueDetailData.dataBits, vueDetailData.stopBits, vueDetailData.parity)
							var data = {
								command: 'comStatusChanged',
								data: {
									state: 0,
									message: 'USB已打开'
								}
							}
							this.webViewToH5(data)
						}
					});
				} else {
					var data = {
						command: 'comStatusChanged',
						data: {
							state: 0,
							message: 'USB未授权'
						}
					}
					this.webViewToH5(data)
				}
			});
		},
		//关闭usb
		closeUSB() {
			console.log('关闭usb')
			UsbSerial.close()
			clearInterval(this.setInterTimeUSB)
			var data = {
				command: 'comStatusChanged',
				data: {
					state: 0,
					message: 'USB已关闭'
				}
			}
			this.webViewToH5(data)
			// uni.showToast({
			// 	title: "usb已断开"
			// })
		},
		// 将16进制的内容转成我们看得懂的字符串内容
		hexCharCodeToStr(hexCharCodeStr) {
			var trimedStr = hexCharCodeStr.trim()
			var rawStr = trimedStr.substr(0, 2).toLowerCase() === "0x" ? trimedStr.substr(2) : trimedStr
			var len = rawStr.length;
			// console.log(len)
			if (len % 2 !== 0) {
				alert("存在非法字符!")
				return ""
			}
			var curCharCode
			var resultStr = []
			for (var i = 0; i < len; i = i + 2) {
				curCharCode = parseInt(rawStr.substr(i, 2), 16)
				resultStr.push(String.fromCharCode(curCharCode))
			}
			return resultStr.join("")
		},
		// uniapp 传参给 vue页面---刘灿测试
		webViewToH5(res) {
			let currentWebview = this.$scope.$getAppWebview();
			let wv = currentWebview.children()[0];
			console.log('uniapp 传参给 vue页面');
			wv.evalJS(`getVueMessage(${JSON.stringify(res)})`);
		},
	}
}