添加串口处理

src/main/load-serialport.js

@@ -0,0 +1,46 @@
+const { ipcMain } = require('electron')
+const SerialPort  = require('serialport')
+const Readline    = require('@serialport/parser-readline')
+const config      = require('./config')
+
+const DEFAULT_BAUDRATE = 9600
+const getSerialPortConstructorArguments = (ports) => {
+  let serialport = config.get('serialport')
+  const path     = ( serialport && serialport.path )     ? serialport.path     : ports[0].path
+  const baudRate = ( serialport && serialport.baudRate ) ? serialport.baudRate : DEFAULT_BAUDRATE
+  return { path, baudRate }
+}
+
+let sender = null
+ipcMain.on("APP_MOUNTED", (event) => {
+  sender = event.sender
+})
+
+const sendMsg = (channel, msg) => {
+  if (sender) sender.send(channel, msg)
+}
+
+SerialPort.list().then((ports, err) => {
+  if (err) {
+    console.log(err)
+    return
+  }
+
+  console.log(ports, '=====================')
+
+  // 过滤到COM1口，很多电脑自带COM1接口
+  ports.filter((port) => port.path != 'COM1')
+  if (ports.length == 0) {
+    console.error('设备为连接')
+    return
+  }
+  
+  try {
+    const { path, baudRate } = getSerialPortConstructorArguments(ports)
+    const serialPort = new SerialPort(path, { baudRate })
+    const parser     = serialPort.pipe(new Readline({ delimiter: '\r\n' }))
+    parser.on('data', (data) => { sendMsg('NMEA', data) })
+  } catch (error) {
+    console.error(error);
+  }
+})