En Sun, 01 Apr 2007 10:10:04 -0300, [Py Thorneiro] <[EMAIL PROTECTED]>
escribió:
[Py Thorneiro]
>> > uint16_t
>> > crc_ccitt_update (uint16_t crc, uint8_t data)
>> > {
>> > data ˆ= lo8 (crc);
>> > data ˆ= data << 4;
>> > return ((((uint16_t)data << 8) | hi8 (crc)) ˆ (uint8_t)(data >> 4)
>> > ˆ ((uint16_t)data << 3));
>> > }
[Martin v. Löwis]
>> Most likely, lo8(crc) == crc & 0xFF, and hi8(crc) == (crc >> 8) & 0xFF
>> (the last bit masking might be redundant, as crc should not occupy more
>> than 16 bits, anyway).
[Py Thorneiro]
> Please, could you help me? :-) How to port this hi8 and lo8 to
> Python,
> is there some function similar?
That's exactly what MvL said. To put it more clearly:
def lo8(i16):
return i16 & 0xff
def hi8(i16):
return (i16 >> 8) & 0xff
--
Gabriel Genellina
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