package main

import (
	"io"
	"sync"

	serial "github.com/tarm/goserial"
)

// CurrentOS 系统类别
const CurrentOS = "linux"

// SerialPort 串口
type SerialPort struct {
	com   string
	port1 string
	port2 string

	windowsRWLock *sync.Mutex
	windowsRWPort io.ReadWriteCloser

	linuxRPort io.ReadWriteCloser
	linuxWPort io.ReadWriteCloser

	baud int // 9600
}

// NewSerialPort 创建串口
func NewSerialPort() *SerialPort {

	sp := &SerialPort{}

	sp.com = "COM1"

	sp.port1 = "/dev/pts/3"
	sp.port2 = "/dev/pts/4"

	// sp.port = "/dev/pts/3"

	sp.baud = 9600

	sp.windowsRWLock = &sync.Mutex{}

	return sp
}

// OpenPort 打开串口
func (sp *SerialPort) OpenPort() {

	if CurrentOS == "linux" {

		cfg1 := &serial.Config{Name: sp.port1, Baud: sp.baud, ReadTimeout: 5}
		port1, err := serial.OpenPort(cfg1)
		if err != nil {
			panic(err)
		}
		sp.linuxRPort = port1

		cfg2 := &serial.Config{Name: sp.port2, Baud: sp.baud, ReadTimeout: 5}
		port2, err := serial.OpenPort(cfg2)
		if err != nil {
			panic(err)
		}
		sp.linuxWPort = port2

	} else {

		cfg1 := &serial.Config{Name: sp.com, Baud: sp.baud, ReadTimeout: 5}
		port1, err := serial.OpenPort(cfg1)
		if err != nil {
			panic(err)
		}
		sp.windowsRWPort = port1
	}

}