HCPBridgeESP32/Investigation/tools/checkcrc.py

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def calc_crc(data):
crc = 0xFFFF
for pos in data:
crc ^= pos
for i in range(8):
if ((crc & 1) != 0):
crc >>= 1
crc ^= 0xA001
else:
crc >>= 1
return crc
def checkLine(l):
data = bytearray.fromhex(l)
crc = calc_crc(data[:len(data)-2])
return str(crc == int.from_bytes(data[-2:],byteorder='little', signed=False))
#return "%04X %04X"%(crc,int.from_bytes(data[-2:],byteorder='little', signed=False))
with open("scan.txt") as f:
for line in f:
if len(line.strip()) > 0:
print(line.strip() + "\t" + checkLine(line.strip()))