CRC校验

# CRC校验
def CRCconfirm():
    string = con_entry1.get()
    string = string.replace(' ', '')
    data = bytearray.fromhex(string)
    crc = 0xFFFF
    for pos in data:
        crc ^= pos
        for i in range(8):
            if ((crc & 1) != 0):
                crc >>= 1
                crc ^= 0xA001
            else:
                crc >>= 1
    hexCRC = hex(((crc & 0xff) << 8) + (crc >> 8))
    hexCRC = hexCRC.replace('x', 'x' + '0' * (6 - len(hexCRC))) if len(hexCRC) < 6 else hexCRC
    # result.set(hexCRC[4:].upper() + ' ' + hexCRC[2:4].upper())
    return [hexCRC[4:].upper(), hexCRC[2:4].upper()]