5 |
Remote Start Via the PCI Bus
Reference Function: srom_crc.c
/*
*srom_crc - generate CRC data for the passed buffer
*description:
*This function’s purpose is to generate the CRC for thepassed buffer.
* call:
*argument #1 = buffer pointer *argument #2 = number of elements
*return: *CRC data */
unsigned int
srom_crc(elements_p, elements_n)
register unsigned char *elements_p;/* buffer pointer */ register unsigned int elements_n;/* number of elements */
{
register unsigned int crc; register unsigned int crc_flipped; register unsigned char cbyte; register unsigned int index, dbit, msb;
crc = 0xffffffff;
for (index = 0; index < elements_n; index++) { cbyte = *elements_p++;
for (dbit = 0; dbit < 8; dbit++) { msb = (crc >> 31) & 1;
crc <<= 1;
if (msb ^ (cbyte & 1)) {
crc ^= 0x04c11db6; crc = 1;
}
cbyte >>= 1;
}
}
crc_flipped = 0;
for (index = 0; index < 32; index++) {
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