<template>
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<div>
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<el-row
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type="flex"
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class="row-bg"
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justify="center"
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v-show="portsList.length == 0"
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>
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<el-col :span="7"
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><div style="margin-top: 400px">
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<span style="display: block">
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仅支持Chrome 89+或者Edge 89+浏览器(安全上下文（HTTPS）中可用)
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</span>
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<el-button type="primary" @click="obtainAuthorization"
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>授权</el-button
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>
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</div></el-col
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>
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</el-row>
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<el-form
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v-show="portsList.length > 0"
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ref="form"
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:model="form"
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label-width="100px"
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>
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<el-row>
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<el-col :span="6"
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><div>
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<el-form-item label="串口">
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<el-select
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v-model="form.port"
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filterable
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placeholder="请选择串口"
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:disabled="isDisable"
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>
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<el-option
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v-for="item in portsList"
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:key="item.value"
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:label="item.label"
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:value="item.value"
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>
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</el-option>
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</el-select>
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</el-form-item>
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<el-form-item label="波特率">
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<el-autocomplete
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popper-class="my-autocomplete"
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v-model="form.baudRate"
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:fetch-suggestions="querySearch"
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placeholder="请输入波特率"
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:disabled="isDisable"
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>
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<i class="el-icon-edit el-input__icon" slot="suffix"> </i>
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<template slot-scope="{ item }">
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<div class="name">{{ item.value }}</div>
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<span class="addr">{{ item.address }}</span>
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</template>
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</el-autocomplete>
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</el-form-item>
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<el-form-item label="数据位">
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<el-select
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v-model="form.dataBits"
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placeholder="请选择数据位"
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:disabled="isDisable"
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>
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<el-option label="7" value="7"></el-option>
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<el-option label="8" value="8"></el-option>
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</el-select>
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</el-form-item>
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<el-form-item label="停止位">
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<el-select
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v-model="form.stopBits"
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placeholder="请选择停止位"
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:disabled="isDisable"
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>
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<el-option label="1" value="1"></el-option>
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<el-option label="2" value="2"></el-option>
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</el-select>
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</el-form-item>
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<el-form-item label="校验位">
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<el-select
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v-model="form.parity"
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placeholder="请选择校验位"
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:disabled="isDisable"
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>
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<el-option label="None" value="none"></el-option>
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<el-option label="Even" value="even"></el-option>
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<el-option label="Odd" value="odd"></el-option>
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</el-select>
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</el-form-item>
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<el-form-item label="流控制">
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<el-select
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v-model="form.flowControl"
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placeholder="请选择流控制"
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:disabled="isDisable"
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>
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<el-option label="None" value="none"></el-option>
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<el-option label="HardWare" value="hardware"></el-option>
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</el-select>
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</el-form-item>
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<el-form-item label="显示历史">
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<el-switch
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v-model="form.isShowHistory"
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@change="loadHistory"
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></el-switch>
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<el-button
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type="danger"
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icon="el-icon-delete"
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circle
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title="清空历史"
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@click="clearHistory"
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></el-button>
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</el-form-item>
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<el-form-item label="发送区设置" v-show="isShowSendArea">
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<el-form-item label="发送格式">
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<el-radio-group v-model="form.type">
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<el-radio label="1">ASCII</el-radio>
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<el-radio label="2">HEX</el-radio>
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</el-radio-group>
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</el-form-item>
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<el-form-item label="发送信息">
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<el-input type="textarea" v-model="form.sendMsg"></el-input>
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</el-form-item>
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<el-button type="primary" @click="sendCommon">发送</el-button>
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</el-form-item>
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<el-form-item>
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<el-button :type="btnType" @click="connectBtn">{{
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btnText
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}}</el-button>
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<el-button type="info" @click="obtainAuthorization"
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>新增授权</el-button
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>
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</el-form-item>
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</div>
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</el-col>
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<el-col :span="10"
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><div>
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<el-form-item label="电子秤信息">
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<el-input
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type="textarea"
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v-model="form.desc"
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disabled
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:autosize="{ minRows: 21, maxRows: 25 }"
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></el-input>
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</el-form-item></div
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></el-col>
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</el-row>
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</el-form>
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</div>
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</template>
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<script>
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import MySerialPort from "@/utils/MySerialPort";
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import USBDevice from "@/utils/usb.json";
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export default {
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data() {
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return {
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input: "",
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keepReading: true,
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form: {
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baudRate: "9600",
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dataBits: "8",
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stopBits: "1",
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parity: "none",
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flowControl: "none",
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desc: "",
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type: "1",
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isShowHistory: false,
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},
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btnType: "primary",
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btnText: "连接串口",
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restaurants: [],
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portsList: [],
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isShowSendArea: true,
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readType: 1,
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};
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},
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mounted() {
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if ("serial" in navigator) {
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this.myserialport = new MySerialPort();
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this.getPorts();
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navigator.serial.addEventListener("connect", (e) => {
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this.$message.success("设备已连接");
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this.getPorts();
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});
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navigator.serial.addEventListener("disconnect", (e) => {
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this.$message.error("设备已断开");
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});
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this.restaurants = this.loadAll();
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} else {
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this.$message.error(
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"当前为HTTP模式或者浏览器版本过低，不支持网页连接串口"
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);
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}
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},
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computed: {
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isDisable() {
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return this.btnType == "danger";
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},
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},
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methods: {
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//接受数据的回调
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callBack(value) {
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if (this.form.isShowHistory) this.form.desc = this.readLi().join("");
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else {
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if (value.length > 0)
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this.form.desc = this.myserialport.hex2atostr(value);
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}
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},
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clearHistory() {
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this.form.desc = "";
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this.myserialport.state.readValue = [];
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},
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loadHistory() {
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if (this.form.isShowHistory) this.form.desc = this.readLi().join("");
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else {
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let temp = this.readLi();
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if (temp.length > 0) this.form.desc = temp[temp.length - 1].join("");
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}
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},
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readLi() {
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let readType = this.readType;
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return this.myserialport.state.readValue.map((items, index) => {
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const item = items.value;
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const type = items.type; // 1接收，2发送
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let body = [];
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if (item !== undefined) {
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let strArr = [];
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for (let hex of Array.from(item)) {
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strArr.push(hex.toString(16).toLocaleUpperCase());
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}
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if (strArr.includes("D") && strArr.includes("A")) {
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if (strArr.indexOf("A") - strArr.indexOf("D") === 1) {
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strArr.splice(strArr.indexOf("D"), 1);
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strArr.splice(strArr.indexOf("A"), 1, <br key={0} />);
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}
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}
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strArr = strArr.map((item) => {
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if (typeof item === "string") {
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if (readType === 1) {
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return this.myserialport.hex2a(parseInt(item, 16));
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} else if (readType === 2) {
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return item + " ";
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}
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}
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return item;
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});
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if (typeof strArr[strArr.length - 1] === "string") {
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strArr.push("\r\n");
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}
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body.push(strArr.join(""));
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}
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return body;
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});
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},
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//连接
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async connectBtn() {
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if (this.btnType == "primary") {
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try {
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this.myserialport.state.baudRate = this.form.baudRate;
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this.myserialport.state.dataBits = this.form.dataBits;
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this.myserialport.state.stopBits = this.form.stopBits;
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this.myserialport.state.parity = this.form.parity;
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this.myserialport.state.flowControl = this.form.flowControl;
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await this.myserialport.openPort(this.form.port, true, this.callBack);
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} catch (error) {
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this.$message.error("串口连接失败！请检查串口是否已被占用");
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}
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if (this.myserialport.state.isOpen) {
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this.$message.success("串口连接成功");
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this.btnType = "danger";
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this.btnText = "关闭串口";
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}
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} else {
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this.myserialport.openPort(this.form.port, false, this.callBack);
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this.$message.success("串口关闭成功");
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this.btnType = "primary";
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this.btnText = "连接串口";
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}
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},
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//授权
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async obtainAuthorization() {
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if ("serial" in navigator) {
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console.log("The Web Serial API is supported.");
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if (!this.myserialport) this.myserialport = new MySerialPort();
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try {
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await this.myserialport.handleRequestPort();
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this.$message.success("串口授权成功");
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this.getPortInfo(this.myserialport.state.ports);
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} catch (error) {
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this.$message.warning("未选择新串口授权！");
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}
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} else {
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this.$message.error(
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"当前为HTTP模式或者浏览器版本过低，不支持网页连接串口"
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);
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}
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},
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//串口列表初始化
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getPortInfo(portList) {
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this.portsList = [];
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portList.map((port, index) => {
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const { usbProductId, usbVendorId } = port.getInfo();
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if (usbProductId === undefined || usbVendorId === undefined) {
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this.portsList.push({ label: "未知设备" + index, value: index });
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} else {
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const usbVendor = USBDevice.filter(
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(item) => parseInt(item.vendor, 16) === usbVendorId
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);
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let usbProduct = [];
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if (usbVendor.length === 1) {
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usbProduct = usbVendor[0].devices.filter(
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(item) => parseInt(item.devid, 16) === usbProductId
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);
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}
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this.portsList.push({ label: usbProduct[0].devname, value: index });
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}
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});
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},
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// 发送
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async sendCommon() {
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if (this.myserialport.state.isOpen) {
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if (this.form.sendMsg.length !== 0) {
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const writeType = this.form.type;
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let value = this.form.sendMsg;
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let arr = [];
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if (writeType == 1) {
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// ASCII
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for (let i = 0; i < value.length; i++) {
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arr.push(this.myserialport.a2hex(value[i]));
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}
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} else if (writeType == 2) {
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// HEX
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if (/^[0-9A-Fa-f]+$/.test(value) && value.length % 2 === 0) {
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for (let i = 0; i < value.length; i = i + 2) {
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arr.push(parseInt(value.substring(i, i + 2), 16));
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}
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} else {
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this.$message.error("格式错误");
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return;
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}
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}
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this.myserialport.writeText(arr);
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} else {
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this.$message.warning("请输入发送的信息");
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}
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} else {
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this.$message.warning("串口处于关闭状态，请连接串口");
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}
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},
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async getPorts() {
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await this.myserialport.getPorts();
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this.getPortInfo(this.myserialport.state.ports);
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},
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querySearch(queryString, cb) {
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var restaurants = this.restaurants;
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var results = queryString
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? restaurants.filter(this.createFilter(queryString))
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: restaurants;
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// 调用 callback 返回建议列表的数据
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cb(results);
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},
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createFilter(queryString) {
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return (restaurant) => {
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return (
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restaurant.value.toLowerCase().indexOf(queryString.toLowerCase()) ===
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0
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);
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};
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},
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loadAll() {
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return [
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{ value: "110" },
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{ value: "300" },
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{ value: "600" },
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{ value: "1200" },
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{ value: "2400" },
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{ value: "4800" },
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{ value: "7200" },
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{ value: "9600" },
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{ value: "14400" },
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{ value: "19200" },
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{ value: "28800" },
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{ value: "38400" },
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{ value: "56000" },
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{ value: "57600" },
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{ value: "76800" },
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{ value: "115200" },
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{ value: "230400" },
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{ value: "460800" },
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];
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},
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},
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};
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</script>
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<style scoped>
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/* ::v-deep .el-textarea__inner {
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height: 320px !important;
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width: 80% !important;
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} */
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</style>
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