+++ /dev/null
-crctab = []
-CRC16 = 0x1021
-
-def do_crc(message, crc = 0):
- for i in range(0,len(message)):
- crc = ((crc << 8) ^ (crctab[(crc >> 8) ^ ord(message[i])])) & 0xffff
- return crc
-
-# Generate crctab
-for val in range(0,256):
- crc = val << 8;
- for i in range(0,8):
- crc = crc << 1
- if (crc & 0x10000):
- crc = crc ^ CRC16
- crctab.append(crc & 0xffff)