crc6.c

通过查找crc表

#include"stdio.h"
#include"string.h"
#include"stdlib.h"

const unsigned char auchCRCHi[] = {
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00,
0xC1, 0x81,
0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0,
0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81,
0x40, 0x01,
0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00,
0xC1, 0x81,
0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80,
0x41, 0x01,
0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00,
0xC1, 0x81,
0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0,
0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81,
0x40, 0x01,
0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00,
0xC1, 0x81,
0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80,
0x41, 0x01,
0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00,
0xC1, 0x81,
0x40
} ;

const unsigned  char auchCRCLo[] = {
0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7, 0x05,
0xC5, 0xC4,
0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B,
0xC9, 0x09,
0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF,
0x1F, 0xDD,
0x1D, 0x1C, 0xDC, 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12,
0x13, 0xD3,
0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32, 0x36,
0xF6, 0xF7,
0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE,
0xFA, 0x3A,
0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A,
0xEA, 0xEE,
0x2E, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7,
0xE6, 0x26,
0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1, 0x63,
0xA3, 0xA2,
0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D,
0xAF, 0x6F,
0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9,
0x79, 0xBB,
0x7B, 0x7A, 0xBA, 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74,
0x75, 0xB5,
0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0, 0x50,
0x90, 0x91,
0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54,
0x9C, 0x5C,
0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58,
0x98, 0x88,
0x48, 0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D,
0x4C, 0x8C,
0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83, 0x41,
0x81, 0x80,
0x40
};

unsigned char* Input_message()
{
  unsigned char *rx_buffer;
  unsigned char ch;
  int i=0;

  printf("input a 0x number to send: ");
  scanf("%x",&rx_buffer[i]);

  i++;

  while(i<4)
  {
    printf("input a 0x number to send: ");
    scanf("%x",&rx_buffer[i]);

    i++;
  }

  return rx_buffer;

}

unsigned char* crc(unsigned char *puchMsg , unsigned short usDataLen)
{
    unsigned char uchCRCHi = 0xFF ;
    unsigned char uchCRCLo = 0xFF ;
    unsigned char uIndex ;
    unsigned char crc_reasult[2];

    while (usDataLen--)
    {
        uIndex = uchCRCHi ^ *puchMsg++ ;
        uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex];
        uchCRCLo = auchCRCLo[uIndex] ;
    }

    crc_reasult[0] = uchCRCLo;
    crc_reasult[1] = uchCRCHi;

    return crc_reasult;
}

void Send_CRCmessage(unsigned char *puchMsg)
{
    unsigned char *crc_reasult;
    unsigned char Sendcrc_reasult[6];
    unsigned char *rx_buffer;
    unsigned char ch;
    int i=0;

    crc_reasult = crc(puchMsg,1);

     for(i=0;i<4;i++)
    {
        Sendcrc_reasult[i] = puchMsg[i];
    }
    for(i=4;i<6;i++)
    {
        Sendcrc_reasult[i]=crc_reasult[i-4];

    }

    printf("the send message is :");

    for(i=0;i<6;i++)
    {
        printf("%x",Sendcrc_reasult[i]);
    }

}

void Receive_message(unsigned char *puchMsg)
{
    
    unsigned char Receive_mess[4];
    unsigned char send_crc[2];
    unsigned char *Receive_crc;
    int i;
    
    puchMsg[1] = 0x11;
    

    printf("The received message is:");

    for(i=0;i<4;i++)
    {
        Receive_mess[i] = puchMsg[i];
        printf("%x",puchMsg[i]);
    }
    printf("\n");


    Receive_crc = crc(puchMsg,1);


    if(send_crc[0]==Receive_crc[0]&&send_crc[1]==Receive_crc[1]) 
        printf("Right!");

     else printf("wrong!");


}

void Menu()
{
    int i;
    char ch;
    unsigned char *puchMsg;


    do
    {
        system("cls");
        for(i=1;i<=2;i++)
       {
          printf("\n");

        }

        printf("********************************************************************************\n");
        printf("\t\t                 Welcome to\n");
        printf("\n\t\t         The    CRC16     system\n");
        printf("*************************************MENU***************************************\n");
        printf("\t\t\t1. Input  \n");
        printf("\t\t\t2. Send_CRCmessage  \n");
        printf("\t\t\t3. Receive_message\n");
        printf("\t\t\t4. Quit \n");
        printf("********************************************************************************\n");

        do
        {
            ch=getchar();
        }while(ch<'1'||ch>'4');

         switch(ch)
        {
            case'1' : system("cls");

                      puchMsg = Input_message();

                      fflush(stdin);
                      getchar();
                      break;
            case'2':  system("cls");

                      Send_CRCmessage(puchMsg);

                      fflush(stdin);
                      getchar();
                      break;
             case'3': system("cls");

                      Receive_message(puchMsg);

                      fflush(stdin);
                      getchar();
                      break;
             case'4': exit(1);
        }
    }while(1);
}



main()
{   
    Menu();
    
}