sireader.py 文件源码

def get_time(self):
        """Read out stations internal time.
        @return: datetime
        """
        bintime = self._send_command(SIReader.C_GET_TIME, b'')[1]
        year = byte2int(bintime[0])
        month = byte2int(bintime[1])
        day = byte2int(bintime[2])
        am_pm = byte2int(bintime[3]) & 0b1
        second = SIReader._to_int(bintime[4:6])
        hour = am_pm * 12 + second // 3600
        second %= 3600
        minute = second // 60
        second %= 60
        ms = int(round(byte2int(bintime[6]) / 256.0 * 1000000))
        self.beep()
        try:
            return datetime(year, month, day, hour, minute, second, ms)
        except ValueError:
            # return None if the time reported by the station is impossible
            return None