ROM2/gencrctab.c

   1 #include <stdio.h>
   2 #define CRC16 0x1021            /* Generator polynomial (X^16 + X^12 + X^5 + 1) */
   3 int main() {
   4         int val;
   5         printf("const u16 crctab[] = {\n\t");
   6         for (val = 0; val <= 255; val++) {
   7                 int i;
   8                 unsigned int crc;
   9                 crc = val << 8;
  10                 for (i = 0; i < 8; i++) {
  11                         crc <<= 1;
  12                         if (crc & 0x10000)
  13                                 crc ^= CRC16;
  14                 }
  15                 printf("0x%04x,", crc&0xffff);
  16                 if ((val+1)%8 == 0) printf("\n\t");
  17     }
  18         printf("};\n");
  19         return 0;
  20 }