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  1. #include <stdio.h>
  2. char CRC8_SAE_J1850_ZERO(char data[], int len);
  3. int main(void) {
  4. 	char data [] ={0xF2,0x00,0x01,0x00,0x00,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
  5. 	int len = 6,crc;
  6. 	crc = CRC8_SAE_J1850_ZERO (data, len);
  7. 	printf("crc %x",crc);
  8. 	return 0;
  9. }
  10.  
  11. char CRC8_SAE_J1850_ZERO(char data[], int len)
  12. {
  13.   char crc = 0x00;
  14.   int i, j;
  15.  
  16.   for (i = 0; i < 32; i++) {
  17.     crc ^= data[i];
  18.     for (j = 0; j < 8; j++) {
  19.       if (crc & 0x80) {
  20.         crc = (crc << 1) ^ 0x1D; // Correct order of operations
  21.       } else {
  22.         crc <<= 1;
  23.       }
  24.     }
  25.   }
  26.   return crc;
  27. }
Success #stdin #stdout 0s 5280KB
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crc 3c
https://ideone.com/83TerW
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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