69 lines
1.8 KiB
JavaScript
69 lines
1.8 KiB
JavaScript
const { ipcMain } = require('electron')
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const SerialPort = require('serialport')
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const InterByteTimeout = require('@serialport/parser-inter-byte-timeout')
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const config = require('./config')
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const NMEAHandler = require('./api/NMEAHandler')
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const DEFAULT_BAUDRATE = 9600
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const getSerialPortConstructorArguments = (ports) => {
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let serialport = config.get('serialport')
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const path = ( serialport && serialport.path ) ? serialport.path : ports[0].path
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const baudRate = ( serialport && serialport.baudRate ) ? serialport.baudRate : DEFAULT_BAUDRATE
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return { path, baudRate }
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}
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const senders = []
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ipcMain.on("APP_MOUNTED", (event) => {
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const { sender } = event
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senders.push(sender)
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sender.once('destroyed', () => {
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const index = senders.indexOf(sender)
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if (index >= 0) senders.splice(index, 1)
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})
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})
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const sendMsg = (channel, msg) => {
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if (senders.length <= 0) return
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try {
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senders.forEach((sender) => {
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sender.send(channel, msg)
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})
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} catch (error) {
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console.error(error)
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}
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}
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SerialPort.list().then((ports, err) => {
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if (err) {
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console.log(err)
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return
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}
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// console.log(ports, '=====================')
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// 过滤掉COM1口，很多电脑自带COM1接口
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ports.filter((port) => port.path != 'COM1')
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if (ports.length == 0) {
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console.error('设备为连接')
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return
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}
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try {
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const { path, baudRate } = getSerialPortConstructorArguments(ports)
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const serialPort = new SerialPort(path, { baudRate })
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const parser = serialPort.pipe(new InterByteTimeout({interval: 30}))
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NMEAHandler.on('handled' , (nmeaObj) => {
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sendMsg('nmea', JSON.stringify(nmeaObj))
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})
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parser.on('data', (data) => NMEAHandler.handle(data.toString()))
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} catch (error) {
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console.error(error);
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}
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})
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