Whatever

.gdb_history

@@ -0,0 +1,3 @@
+b main
+r
+q

main.go

@@ -3,16 +3,27 @@ package main
 import (
 	"fmt"
 	"gx-proj/tools"
+	"os"
 )
 
 func main() {
 	var availableSlave []int
+	var n,temp int
+	fmt.Println("Input the number of slaves:")
+	fmt.Scan(&n)
+	fmt.Println("Input the available slaves:")
+	for i := 0; i < n; i++ {
+		fmt.Scanf("%d", temp)
+		availableSlave = append(availableSlave, temp)
+	}
 	fmt.Println("Checking available slaves...")
-	for i := 0; i < 0xFF; i++ {
-		if tools.CheckSlave(i, 0) {
-			availableSlave = append(availableSlave, i)
+	for i :=range availableSlave{
+		if !tools.CheckSlave(i, 0) {
+			fmt.Println("Slave", i, "is not available")
+			os.Exit(0)
 		}
 	}
+	//availableSlave=append(availableSlave,3)
 	fmt.Println("\nAvailable slaves:", availableSlave)
 	fmt.Println("Please press any key to continue")
 	var input string

tools/func.go

@@ -3,6 +3,7 @@ package tools
 import (
 	"fmt"
 	"time"
+	"io"
 )
 
 const (
@@ -24,7 +25,10 @@ func CheckSlave(addr, depth int) bool {
 	var sendData = []byte{byte(PACKET_HEAD), byte(addr), byte(FUN_CHECKSLAVE), byte(CHECK_CONTENT)}
 	sendData = append(sendData, checkSum(sendData))
 	go Send(sendData)
-	recvData := Recv()
+	recvData,err := Recv()
+	if err==io.EOF {
+		return false
+	}
 	if recvData[0] == byte(PACKET_HEAD) &&
 		recvData[1] == byte(addr) &&
 		recvData[2] == byte(FUN_CHECKSLAVE) &&
@@ -51,7 +55,7 @@ func GetGrade(addr, depth int) int {
 	var sendData = []byte{byte(PACKET_HEAD), byte(BROADCAST_ADDR), byte(FUN_READINFO), byte(addr)}
 	sendData = append(sendData, checkSum(sendData))
 	go Send(sendData)
-	recvData := Recv()
+	recvData,_ := Recv()
 	if recvData[0] == byte(PACKET_HEAD) &&
 		recvData[1] == byte(addr) &&
 		recvData[2] == byte(FUN_READINFO) {

tools/rw.go

@@ -1,11 +1,13 @@
 package tools
 
 import "github.com/tarm/serial"
+import "time"
+import "io"
 
 var conn *serial.Port
 
 func init() {
-	c := &serial.Config{Name: "/dev/ttyUSB0", Baud: 9600}
+	c := &serial.Config{Name: "/dev/ttyUSB0", Baud: 9600, ReadTimeout: time.Millisecond*500}
 	var err error
 	conn, err = serial.OpenPort(c)
 	if err != nil {
@@ -19,11 +21,14 @@ func Send(data []byte) {
 	}
 }
 
-func Recv() []byte {
+func Recv() ([]byte,error) {
 	buf := make([]byte, 128)
 	n, err := conn.Read(buf)
-	if err != nil {
+	if err==io.EOF {
+		return nil,err
+	}
+	if err != nil && err!=io.EOF {
 		panic(err)
 	}
-	return buf[:n]
+	return buf[:n],nil
 }