dashgo_driver.py 文件源码

def connect(self):
        try:
            print "Connecting to Arduino on port", self.port, "..."
            self.port = Serial(port=self.port, baudrate=self.baudrate, timeout=self.timeout, writeTimeout=self.writeTimeout)
            # The next line is necessary to give the firmware time to wake up.
            time.sleep(1)
            test = self.get_baud()
            if test != self.baudrate:
                time.sleep(1)
                test = self.get_baud()   
                if test != self.baudrate:
                    raise SerialException
            print "Connected at", self.baudrate
            print "Arduino is ready."

        except SerialException:
            print "Serial Exception:"
            print sys.exc_info()
            print "Traceback follows:"
            traceback.print_exc(file=sys.stdout)
            print "Cannot connect to Arduino!"
            os._exit(1)