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14fd5ff5a3
* mv first * switch to crc8 * bootstub * test * cleanup * little more * misra --------- Co-authored-by: Comma Device <device@comma.ai>
13 lines
321 B
Python
13 lines
321 B
Python
def crc8_pedal(data):
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crc = 0xFF # standard init value
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poly = 0xD5 # standard crc8: x8+x7+x6+x4+x2+1
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size = len(data)
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for i in range(size - 1, -1, -1):
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crc ^= data[i]
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for _ in range(8):
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if ((crc & 0x80) != 0):
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crc = ((crc << 1) ^ poly) & 0xFF
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else:
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crc <<= 1
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return crc
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