hardware.py 文件源码

def mai_set_time(self, gpstime):
        """
        Sets the ADACS clock.

        Arguments:
            gpstime - GPS time is a linear count of seconds elapsed since 0h Jan 6, 1980.
        """

        DATA_LEN = 40 #always
        data = bytearray(DATA_LEN)

        syncbyte    = 0xEB90 # TODO: the Pumpkin comments contain some confusing statements about endianness
        commandID   = 0x44   # set GPS time

        # Create data
        struct.pack_into('<HBL', data, 0, syncbyte, commandID, 
                         gpstime)

        # Add data checksum.  (This is different than the packet checksum.)
        checksum = 0xFFFF & sum(data[0:DATA_LEN]) 
        struct.pack_into('<H', data, 38, checksum) 

        Send.send_bus_cmd(BusCommands.MAI_CMD, data)