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  1. #include <stdio.h>
  2. #include <stdint.h>
  3.  
  4. uint8_t _crc8_update(uint8_t crc, uint8_t data)
  5. {
  6. 	uint8_t i;
  7.  
  8. 	crc = crc ^ data;
  9.  
  10. 	for (i = 0; i < 8; i++)
  11. 	{
  12. 		if (crc & 0x01)
  13. 			crc = (crc >> 1) ^ 0x8C;
  14. 		else
  15. 			crc >>= 1;
  16. 	}
  17.  
  18. 	return crc;
  19. }
  20.  
  21. int crc8(uint8_t *darry, uint16_t sz)
  22. {
  23. 	uint8_t crc = 0;
  24. 	uint8_t i;
  25.  
  26. 	for (i = 0; i < sz; i++)
  27. 		crc = _crc8_update(crc, darry[i]);
  28.  
  29. 	return crc;
  30. }
  31.  
  32. int main(void)
  33. {
  34. 	uint8_t serno[] = { 0x53, 0xe7, 0x73, 0x4c, 0x68, 0x4f, 0x03, 0x4e, 0x33 };
  35.  
  36. 	uint8_t crc = crc8(serno, sizeof(serno)/sizeof(uint8_t));
  37. 	printf("CRC8 = %02X\n", crc);
  38.  
  39. 	return 0;
  40. }
  41.  
Success #stdin #stdout 0.01s 5300KB
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stdin
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Standard input is empty
stdout
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CRC8 = 00
https://ideone.com/0zfpjS
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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