first running version

main.go

@@ -14,9 +14,10 @@ import (
 func main() {
 	parser := argparse.NewParser("go-scsupdate", "Update Firmware of SCS PACTOR modems")
 	serialDevice := parser.String("s", "serialDevice", &argparse.Options{Required: false, Help: "(optional) serial device the modem is attached to, e.g. /dev/ttyUSB0. If not set, go-scsupdate will search for SCS modems."})
-	_ = parser.String("b", "baudrate", &argparse.Options{Required: false, Help: "(optional) sets the serial baudrate, e.g. 115200"})
+	brate := parser.Int("b", "baudrate", &argparse.Options{Required: false, Help: "(optional, required when -s is set) sets the serial baudrate, e.g. 115200"})
 	f := parser.String("f", "file", &argparse.Options{Required: true, Help: "(required) the file to flash, e.g. profi41r.pro"})
 	debug := parser.Flag("d", "debug", &argparse.Options{Required: false, Help: "(optional) enable debug logs"})
+	dryrun := parser.Flag("n", "dryrun", &argparse.Options{Required: false, Help: "(optional) drying:  if set, modem will detected but no firmware being written"})
 	err := parser.Parse(os.Args)
 	cLog := console.New(true)
 	if *debug {
@@ -25,6 +26,10 @@ func main() {
 	} else {
 		log.AddHandler(cLog, log.InfoLevel, log.ErrorLevel, log.AlertLevel, log.WarnLevel, log.NoticeLevel, log.PanicLevel)
 	}
+
+	if *serialDevice != "" && *brate == 0 {
+		log.Fatal("ERROR: if you specify a device, you need to specify a baud rate as well. Cannot continue")
+	}
 	if err != nil {
 		log.Fatal(parser.Usage(err))
 		os.Exit(1)
@@ -41,10 +46,14 @@ func main() {
 					msg += fmt.Sprintf("Port: %30s : Name: %s\n", p.Port, p.Name)
 				}
 				log.Fatal(msg)
+			} else { // exactly one modem found, that's how we like it :-)
+				log.Infof("Found %s modem at port %s. Default baud rate is: %d", ports[0].Name, ports[0].Port, ports[0].Baudrate)
 			}
 		} else {
 			log.Fatal("Error while seaching SCS modems: ", err)
 		}
+	} else {
+		log.Notice("Using given device! Will not check if firmware fits your modem!")
 	}
 
 	if !firmware.FwExists(*f) {
@@ -58,9 +67,27 @@ func main() {
 		log.Debug("checks passed")
 	}
 
-	err = update.Update("/dev/ttyUSB0", 829400, *f)
-	if err != nil {
-		log.Panic(err)
+	baudrate := 0
+	if *brate != 0 {
+		baudrate = *brate
+		log.Infof("Using given baudrate of %d", baudrate)
+	} else {
+		baudrate = ports[0].Baudrate
+		log.Infof("Using default baudrate of %d", baudrate)
+	}
+
+	if *dryrun != true {
+		var err error
+		if *serialDevice != "" {
+			err = update.Update(*serialDevice, baudrate, *f)
+		} else {
+			err = update.Update(ports[0].Port, baudrate, *f)
+		}
+		if err != nil {
+			log.Panic(err)
+		}
+	} else {
+		log.Info("Dryrun requested, no firmware written!")
 	}
 
 }