// connect to either a net port for telnet use, or to a serial device
func connect(name string) (io.ReadWriter, error) {
if isNetPort(name) {
return net.Dial("tcp", name)
}
config := serial.Config{Name: *port, Baud: *baud}
if *upload != "" {
config.Parity = serial.ParityEven
}
return serial.OpenPort(&config)
}
func changeGPSBaudRate(config *serial.Config, newRate int) error {
if config.Baud == newRate {
return nil
}
p, err := serial.OpenPort(config)
if err != nil {
return err
}
defer p.Close()
baud_cfg := createChecksummedNMEASentence([]byte(fmt.Sprintf("PMTK251,%d", newRate)))
_, err = p.Write(baud_cfg)
if err != nil {
return err
}
config.Baud = newRate
valid, err := detectGPS(config)
if !valid {
err = fmt.Errorf("Set GPS to new rate, but unable to detect it at that new rate!")
}
return err
}