#include "archinc.h"
#include "crc8.h"

#ifdef CONFIG_INCLUDE_CRC8

static const char crc8Table[256] = {
    0x00, 0x18, 0x30, 0x28, 0x60, 0x78, 0x50, 0x48,
    0xC0, 0xD8, 0xF0, 0xE8, 0xA0, 0xB8, 0x90, 0x88,
    0x98, 0x80, 0xA8, 0xB0, 0xF8, 0xE0, 0xC8, 0xD0,
    0x58, 0x40, 0x68, 0x70, 0x38, 0x20, 0x08, 0x10,
    0x28, 0x30, 0x18, 0x00, 0x48, 0x50, 0x78, 0x60,
    0xE8, 0xF0, 0xD8, 0xC0, 0x88, 0x90, 0xB8, 0xA0,
    0xB0, 0xA8, 0x80, 0x98, 0xD0, 0xC8, 0xE0, 0xF8,
    0x70, 0x68, 0x40, 0x58, 0x10, 0x08, 0x20, 0x38,
    0x50, 0x48, 0x60, 0x78, 0x30, 0x28, 0x00, 0x18,
    0x90, 0x88, 0xA0, 0xB8, 0xF0, 0xE8, 0xC0, 0xD8,
    0xC8, 0xD0, 0xF8, 0xE0, 0xA8, 0xB0, 0x98, 0x80,
    0x08, 0x10, 0x38, 0x20, 0x68, 0x70, 0x58, 0x40,
    0x78, 0x60, 0x48, 0x50, 0x18, 0x00, 0x28, 0x30,
    0xB8, 0xA0, 0x88, 0x90, 0xD8, 0xC0, 0xE8, 0xF0,
    0xE0, 0xF8, 0xD0, 0xC8, 0x80, 0x98, 0xB0, 0xA8,
    0x20, 0x38, 0x10, 0x08, 0x40, 0x58, 0x70, 0x68,
    0xA0, 0xB8, 0x90, 0x88, 0xC0, 0xD8, 0xF0, 0xE8,
    0x60, 0x78, 0x50, 0x48, 0x00, 0x18, 0x30, 0x28,
    0x38, 0x20, 0x08, 0x10, 0x58, 0x40, 0x68, 0x70,
    0xF8, 0xE0, 0xC8, 0xD0, 0x98, 0x80, 0xA8, 0xB0,
    0x88, 0x90, 0xB8, 0xA0, 0xE8, 0xF0, 0xD8, 0xC0,
    0x48, 0x50, 0x78, 0x60, 0x28, 0x30, 0x18, 0x00,
    0x10, 0x08, 0x20, 0x38, 0x70, 0x68, 0x40, 0x58,
    0xD0, 0xC8, 0xE0, 0xF8, 0xB0, 0xA8, 0x80, 0x98,
    0xF0, 0xE8, 0xC0, 0xD8, 0x90, 0x88, 0xA0, 0xB8,
    0x30, 0x28, 0x00, 0x18, 0x50, 0x48, 0x60, 0x78,
    0x68, 0x70, 0x58, 0x40, 0x08, 0x10, 0x38, 0x20,
    0xA8, 0xB0, 0x98, 0x80, 0xC8, 0xD0, 0xF8, 0xE0,
    0xD8, 0xC0, 0xE8, 0xF0, 0xB8, 0xA0, 0x88, 0x90,
    0x18, 0x00, 0x28, 0x30, 0x78, 0x60, 0x48, 0x50,
    0x40, 0x58, 0x70, 0x68, 0x20, 0x38, 0x10, 0x08,
    0x80, 0x98, 0xB0, 0xA8, 0xE0, 0xF8, 0xD0, 0xC8
};

char crc8Init(void)
{
  return CRC8_INIT_VALUE;
}

#ifdef CONFIG_TOOLCHAIN_IAR
#pragma inline
#endif
char INLINE_KEYWORD crc8Update(char crcData, char prevCrc8)
{
  return crc8Table[crcData ^ prevCrc8];
}

char crc8StrUpdate(char * pCrcData, int len, char prevCrc8)
{
  int i;
    
  for (i=0; i<len; i++) {
        prevCrc8 = crc8Table[pCrcData[i] ^ prevCrc8];
    }    
  return prevCrc8;
}

char crc8Calc(char *pCrcData, int len)
{ 
  int i;
  char crcCalc = CRC8_INIT_VALUE;

  for (i=0; i<len; i++) {
        crcCalc = crc8Table[pCrcData[i] ^ crcCalc];
    }    
  return crcCalc;
}

#endif /* CONFIG_INCLUDE_CRC8 */