package main

import (
	"context"
	"fmt"
	"log"
	"strings"
	"time"

	"gitee.com/lvinkim/golib"
)

func Test_Usart_Write() {

	golib.Vusart.Initial("COM19", 115200)

	for i := 0; i < 100; i++ {
		buf := fmt.Sprintf("ok %d\r\n", i)
		err := golib.Vusart.Write(buf)
		if err != nil {
			log.Println(err)
		}
		time.Sleep(500 * time.Millisecond)
	}

}
func Test_Usart_ReadSplit() {

	ctx, cancel := context.WithCancel(context.Background())

	golib.Vusart.Initial("COM19", 115200)

	ch, err := golib.Vusart.ReadSplit(ctx, "\r\n")
	if err != nil {
		log.Fatalln(err)
	}

	i := 0
	for str := range ch {
		if len(str) > 0 {
			log.Println(i, str)
			i++
		}

		if i >= 10 {
			break
		}
	}
	cancel()
	time.Sleep(3 * time.Second)
}

func Test_Usart_Read() {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	golib.Vusart.Initial("COM19", 115200)

	ch, err := golib.Vusart.Read(ctx)
	if err != nil {
		log.Fatalln(err)
	}

	var tmpStr string = ""
	for str := range ch {
		if len(str) > 0 {
			tmpStr += str
		}
		for {
			crlf := strings.Index(tmpStr, "\r\n")
			if crlf >= 0 {
				log.Println(tmpStr[:crlf])

				if len(tmpStr) > crlf+2 {
					tmpStr = tmpStr[crlf+2:]
				} else {
					tmpStr = ""
				}
			} else {
				break
			}
		}

	}
}