def crc_cal(num, binary=True, bit_num=10):
if binary:
num = bit_str2num(num)
byte_arr = bytearray(num.to_bytes(2, 'big'))
crc = Crc4Itu.calc(byte_arr)
if binary:
return num2bin(crc, 4)
else:
return crc
def crc_validate(num, crc, binary=True, bit_num=10):
if binary:
num = bit_str2num(num)
crc = bit_str2num(crc)
hex_byte = bytes([crc])
byte_arr = bytearray(num.to_bytes(2, 'big')) + hex_byte
new_crc = Crc4Itu.calc(byte_arr)
if new_crc == 0:
return True
return False