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Dear Andy,

I've tried the CRC32 macro , but still not work
it must be my code mistake somehow.

Could you kindly show me the code that how you use with CRC32 macro ?

My invalid code.
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unsigned long crc32(unsigned long crc, const unsigned char *buf, int len)
{
#define CRC32_POLYNOMIAL 0x00400007
    unsigned long crc_table[256];
    unsigned long crc32;
    int i, j;

    for (i = 0; i < 256; i++) {
        crc32 = i;
        for (j = 8; j > 0; j--) {
            if (crc32 & 1)
                crc32 = (crc32 >> 1) ^ CRC32_POLYNOMIAL;
            else
                crc32 >>= 1;
        }
        crc_table = crc32;
    }
  if (buf == NULL) return 0L;
#define CRC32(c,crc) ( crc_table[((int)(crc) ^ (c)) & 0xff] ^ (((crc) >> 8 ) &0x00FFFFFFL))
#define DO1(buf)  crc = CRC32(crc, *buf++)
#define DO2(buf)  DO1(buf); DO1(buf)
#define DO4(buf)  DO2(buf); DO2(buf)
#define DO8(buf)  DO4(buf); DO4(buf)
  crc = crc ^ 0xffffffffL;
#ifndef NO_UNROLLED_LOOPS
  while (len >= 8 ) {
    DO8(buf);
    len -= 8;
  }
#endif
  if (len) do {
    DO1(buf);
  } while (--len);
  return crc ^ 0xffffffffL;
}