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[C++] 21个常用的CRC参数模型C语言实现

编程语言 编程语言 发布于：2021-12-28 15:09 | 阅读数：480 | 评论：0

文章目录










      • ​​开源地址​​
      • ​​常用的21个参数模型​​
      • ​​CRC计算工具​​
      • ​​C语言实现​​








开源地址





  • GitHub：https://github.com/whik/crc-lib-c
  • Gitee：https://gitee.com/whik/crc-lib-c



包含常用的21个CRC参数模型实现
DSC0000.png

使用方法非常简单：
#include <stdio.h>
#include <stdlib.h>
#include "crcLib.h"
int main()
{
  uint8_t LENGTH = 10;
  uint8_t data[LENGTH];
  uint8_t crc;
  for(int i = 0; i < LENGTH; i++)
  {
    data[i] = i*5;
    printf("%02x ", data[i]);
  }
  printf("\n");
  crc = crc8_maxim(data, LENGTH);
  printf("CRC-8/MAXIM:%02x\n", crc);
  return 0;
}
计算结果：
DSC0001.jpg

常用的21个参数模型
DSC0002.jpg

CRC计算工具
在线计算工具：www.ip33.com/crc.html
离线计算工具：





  • CRC_Calc v0.1：http://xz.w10a.com/Small/CRCJISUANQI.zip
  • 格西CRC计算器：http://www.geshe.com/home/products/GToolbox/bin/GCRC.exe



C语言实现
crcLib.c文件
#include "crcLib.h"
/******************************************************************************
 * Name:  CRC-4/ITU       x4+x+1
 * Poly:  0x03
 * Init:  0x00
 * Refin:   True
 * Refout:  True
 * Xorout:  0x00
 * Note:
 *****************************************************************************/
uint8_t crc4_itu(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint8_t crc = 0;        // Initial value
  while(length--)
  {
    crc ^= *data++;         // crc ^= *data; data++;
    for (i = 0; i < 8; ++i)
    {
      if (crc & 1)
        crc = (crc >> 1) ^ 0x0C;// 0x0C = (reverse 0x03)>>(8-4)
      else
        crc = (crc >> 1);
    }
  }
  return crc;
}
/******************************************************************************
 * Name:  CRC-5/EPC       x5+x3+1
 * Poly:  0x09
 * Init:  0x09
 * Refin:   False
 * Refout:  False
 * Xorout:  0x00
 * Note:
 *****************************************************************************/
uint8_t crc5_epc(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint8_t crc = 0x48;    // Initial value: 0x48 = 0x09<<(8-5)
  while(length--)
  {
    crc ^= *data++;    // crc ^= *data; data++;
    for ( i = 0; i < 8; i++ )
    {
      if ( crc & 0x80 )
        crc = (crc << 1) ^ 0x48;    // 0x48 = 0x09<<(8-5)
      else
        crc <<= 1;
    }
  }
  return crc >> 3;
}
/******************************************************************************
 * Name:  CRC-5/ITU       x5+x4+x2+1
 * Poly:  0x15
 * Init:  0x00
 * Refin:   True
 * Refout:  True
 * Xorout:  0x00
 * Note:
 *****************************************************************************/
uint8_t crc5_itu(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint8_t crc = 0;        // Initial value
  while(length--)
  {
    crc ^= *data++;         // crc ^= *data; data++;
    for (i = 0; i < 8; ++i)
    {
      if (crc & 1)
        crc = (crc >> 1) ^ 0x15;// 0x15 = (reverse 0x15)>>(8-5)
      else
        crc = (crc >> 1);
    }
  }
  return crc;
}
/******************************************************************************
 * Name:  CRC-5/USB       x5+x2+1
 * Poly:  0x05
 * Init:  0x1F
 * Refin:   True
 * Refout:  True
 * Xorout:  0x1F
 * Note:
 *****************************************************************************/
uint8_t crc5_usb(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint8_t crc = 0x1F;        // Initial value
  while(length--)
  {
    crc ^= *data++;         // crc ^= *data; data++;
    for (i = 0; i < 8; ++i)
    {
      if (crc & 1)
        crc = (crc >> 1) ^ 0x14;// 0x14 = (reverse 0x05)>>(8-5)
      else
        crc = (crc >> 1);
    }
  }
  return crc ^ 0x1F;
}
/******************************************************************************
 * Name:  CRC-6/ITU       x6+x+1
 * Poly:  0x03
 * Init:  0x00
 * Refin:   True
 * Refout:  True
 * Xorout:  0x00
 * Note:
 *****************************************************************************/
uint8_t crc6_itu(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint8_t crc = 0;     // Initial value
  while(length--)
  {
    crc ^= *data++;    // crc ^= *data; data++;
    for (i = 0; i < 8; ++i)
    {
      if (crc & 1)
        crc = (crc >> 1) ^ 0x30;// 0x30 = (reverse 0x03)>>(8-6)
      else
        crc = (crc >> 1);
    }
  }
  return crc;
}
/******************************************************************************
 * Name:  CRC-7/MMC       x7+x3+1
 * Poly:  0x09
 * Init:  0x00
 * Refin:   False
 * Refout:  False
 * Xorout:  0x00
 * Use:   MultiMediaCard,SD,ect.
 *****************************************************************************/
uint8_t crc7_mmc(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint8_t crc = 0;    // Initial value
  while(length--)
  {
    crc ^= *data++;    // crc ^= *data; data++;
    for ( i = 0; i < 8; i++ )
    {
      if ( crc & 0x80 )
        crc = (crc << 1) ^ 0x12;    // 0x12 = 0x09<<(8-7)
      else
        crc <<= 1;
    }
  }
  return crc >> 1;
}
/******************************************************************************
 * Name:  CRC-8         x8+x2+x+1
 * Poly:  0x07
 * Init:  0x00
 * Refin:   False
 * Refout:  False
 * Xorout:  0x00
 * Note:
 *****************************************************************************/
uint8_t crc8(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint8_t crc = 0;    // Initial value
  while(length--)
  {
    crc ^= *data++;    // crc ^= *data; data++;
    for ( i = 0; i < 8; i++ )
    {
      if ( crc & 0x80 )
        crc = (crc << 1) ^ 0x07;
      else
        crc <<= 1;
    }
  }
  return crc;
}
/******************************************************************************
 * Name:  CRC-8/ITU       x8+x2+x+1
 * Poly:  0x07
 * Init:  0x00
 * Refin:   False
 * Refout:  False
 * Xorout:  0x55
 * Alias:   CRC-8/ATM
 *****************************************************************************/
uint8_t crc8_itu(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint8_t crc = 0;    // Initial value
  while(length--)
  {
    crc ^= *data++;    // crc ^= *data; data++;
    for ( i = 0; i < 8; i++ )
    {
      if ( crc & 0x80 )
        crc = (crc << 1) ^ 0x07;
      else
        crc <<= 1;
    }
  }
  return crc ^ 0x55;
}
/******************************************************************************
 * Name:  CRC-8/ROHC      x8+x2+x+1
 * Poly:  0x07
 * Init:  0xFF
 * Refin:   True
 * Refout:  True
 * Xorout:  0x00
 * Note:
 *****************************************************************************/
uint8_t crc8_rohc(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint8_t crc = 0xFF;     // Initial value
  while(length--)
  {
    crc ^= *data++;      // crc ^= *data; data++;
    for (i = 0; i < 8; ++i)
    {
      if (crc & 1)
        crc = (crc >> 1) ^ 0xE0;    // 0xE0 = reverse 0x07
      else
        crc = (crc >> 1);
    }
  }
  return crc;
}
/******************************************************************************
 * Name:  CRC-8/MAXIM     x8+x5+x4+1
 * Poly:  0x31
 * Init:  0x00
 * Refin:   True
 * Refout:  True
 * Xorout:  0x00
 * Alias:   DOW-CRC,CRC-8/IBUTTON
 * Use:   Maxim(Dallas)'s some devices,e.g. DS18B20
 *****************************************************************************/
uint8_t crc8_maxim(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint8_t crc = 0;     // Initial value
  while(length--)
  {
    crc ^= *data++;    // crc ^= *data; data++;
    for (i = 0; i < 8; i++)
    {
      if (crc & 1)
        crc = (crc >> 1) ^ 0x8C;    // 0x8C = reverse 0x31
      else
        crc >>= 1;
    }
  }
  return crc;
}
/******************************************************************************
 * Name:  CRC-16/IBM      x16+x15+x2+1
 * Poly:  0x8005
 * Init:  0x0000
 * Refin:   True
 * Refout:  True
 * Xorout:  0x0000
 * Alias:   CRC-16,CRC-16/ARC,CRC-16/LHA
 *****************************************************************************/
uint16_t crc16_ibm(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint16_t crc = 0;    // Initial value
  while(length--)
  {
    crc ^= *data++;    // crc ^= *data; data++;
    for (i = 0; i < 8; ++i)
    {
      if (crc & 1)
        crc = (crc >> 1) ^ 0xA001;    // 0xA001 = reverse 0x8005
      else
        crc = (crc >> 1);
    }
  }
  return crc;
}
/******************************************************************************
 * Name:  CRC-16/MAXIM    x16+x15+x2+1
 * Poly:  0x8005
 * Init:  0x0000
 * Refin:   True
 * Refout:  True
 * Xorout:  0xFFFF
 * Note:
 *****************************************************************************/
uint16_t crc16_maxim(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint16_t crc = 0;    // Initial value
  while(length--)
  {
    crc ^= *data++;    // crc ^= *data; data++;
    for (i = 0; i < 8; ++i)
    {
      if (crc & 1)
        crc = (crc >> 1) ^ 0xA001;    // 0xA001 = reverse 0x8005
      else
        crc = (crc >> 1);
    }
  }
  return ~crc;  // crc^0xffff
}
/******************************************************************************
 * Name:  CRC-16/USB      x16+x15+x2+1
 * Poly:  0x8005
 * Init:  0xFFFF
 * Refin:   True
 * Refout:  True
 * Xorout:  0xFFFF
 * Note:
 *****************************************************************************/
uint16_t crc16_usb(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint16_t crc = 0xffff;    // Initial value
  while(length--)
  {
    crc ^= *data++;      // crc ^= *data; data++;
    for (i = 0; i < 8; ++i)
    {
      if (crc & 1)
        crc = (crc >> 1) ^ 0xA001;    // 0xA001 = reverse 0x8005
      else
        crc = (crc >> 1);
    }
  }
  return ~crc;  // crc^0xffff
}
/******************************************************************************
 * Name:  CRC-16/MODBUS     x16+x15+x2+1
 * Poly:  0x8005
 * Init:  0xFFFF
 * Refin:   True
 * Refout:  True
 * Xorout:  0x0000
 * Note:
 *****************************************************************************/
uint16_t crc16_modbus(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint16_t crc = 0xffff;    // Initial value
  while(length--)
  {
    crc ^= *data++;      // crc ^= *data; data++;
      printf("%04x\n", crc);
    for (i = 0; i < 8; ++i)
    {
      if (crc & 1)
        crc = (crc >> 1) ^ 0xA001;    // 0xA001 = reverse 0x8005
      else
        crc = (crc >> 1);
      printf("%04x\n", crc);
    }
  }
  return crc;
}
/******************************************************************************
 * Name:  CRC-16/CCITT    x16+x12+x5+1
 * Poly:  0x1021
 * Init:  0x0000
 * Refin:   True
 * Refout:  True
 * Xorout:  0x0000
 * Alias:   CRC-CCITT,CRC-16/CCITT-TRUE,CRC-16/KERMIT
 *****************************************************************************/
uint16_t crc16_ccitt(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint16_t crc = 0;    // Initial value
  while(length--)
  {
    crc ^= *data++;    // crc ^= *data; data++;
    for (i = 0; i < 8; ++i)
    {
      if (crc & 1)
        crc = (crc >> 1) ^ 0x8408;    // 0x8408 = reverse 0x1021
      else
        crc = (crc >> 1);
    }
  }
  return crc;
}
/******************************************************************************
 * Name:  CRC-16/CCITT-FALSE   x16+x12+x5+1
 * Poly:  0x1021
 * Init:  0xFFFF
 * Refin:   False
 * Refout:  False
 * Xorout:  0x0000
 * Note:
 *****************************************************************************/
uint16_t crc16_ccitt_false(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint16_t crc = 0xffff;    //Initial value
  while(length--)
  {
    crc ^= (uint16_t)(*data++) << 8; // crc ^= (uint6_t)(*data)<<8; data++;
    for (i = 0; i < 8; ++i)
    {
      if ( crc & 0x8000 )
        crc = (crc << 1) ^ 0x1021;
      else
        crc <<= 1;
    }
  }
  return crc;
}
/******************************************************************************
 * Name:  CRC-16/X25      x16+x12+x5+1
 * Poly:  0x1021
 * Init:  0xFFFF
 * Refin:   True
 * Refout:  True
 * Xorout:  0XFFFF
 * Note:
 *****************************************************************************/
uint16_t crc16_x25(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint16_t crc = 0xffff;    // Initial value
  while(length--)
  {
    crc ^= *data++;      // crc ^= *data; data++;
    for (i = 0; i < 8; ++i)
    {
      if (crc & 1)
        crc = (crc >> 1) ^ 0x8408;    // 0x8408 = reverse 0x1021
      else
        crc = (crc >> 1);
    }
  }
  return ~crc;        // crc^Xorout
}
/******************************************************************************
 * Name:  CRC-16/XMODEM     x16+x12+x5+1
 * Poly:  0x1021
 * Init:  0x0000
 * Refin:   False
 * Refout:  False
 * Xorout:  0x0000
 * Alias:   CRC-16/ZMODEM,CRC-16/ACORN
 *****************************************************************************/
uint16_t crc16_xmodem(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint16_t crc = 0;      // Initial value
  while(length--)
  {
    crc ^= (uint16_t)(*data++) << 8; // crc ^= (uint16_t)(*data)<<8; data++;
    for (i = 0; i < 8; ++i)
    {
      if ( crc & 0x8000 )
        crc = (crc << 1) ^ 0x1021;
      else
        crc <<= 1;
    }
  }
  return crc;
}
/******************************************************************************
 * Name:  CRC-16/DNP      x16+x13+x12+x11+x10+x8+x6+x5+x2+1
 * Poly:  0x3D65
 * Init:  0x0000
 * Refin:   True
 * Refout:  True
 * Xorout:  0xFFFF
 * Use:   M-Bus,ect.
 *****************************************************************************/
uint16_t crc16_dnp(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint16_t crc = 0;      // Initial value
  while(length--)
  {
    crc ^= *data++;      // crc ^= *data; data++;
    for (i = 0; i < 8; ++i)
    {
      if (crc & 1)
        crc = (crc >> 1) ^ 0xA6BC;    // 0xA6BC = reverse 0x3D65
      else
        crc = (crc >> 1);
    }
  }
  return ~crc;        // crc^Xorout
}
/******************************************************************************
 * Name:  CRC-32  x32+x26+x23+x22+x16+x12+x11+x10+x8+x7+x5+x4+x2+x+1
 * Poly:  0x4C11DB7
 * Init:  0xFFFFFFF
 * Refin:   True
 * Refout:  True
 * Xorout:  0xFFFFFFF
 * Alias:   CRC_32/ADCCP
 * Use:   WinRAR,ect.
 *****************************************************************************/
uint32_t crc32(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint32_t crc = 0xffffffff;    // Initial value
  while(length--)
  {
    crc ^= *data++;        // crc ^= *data; data++;
    for (i = 0; i < 8; ++i)
    {
      if (crc & 1)
        crc = (crc >> 1) ^ 0xEDB88320;// 0xEDB88320= reverse 0x04C11DB7
      else
        crc = (crc >> 1);
    }
  }
  return ~crc;
}
/******************************************************************************
 * Name:  CRC-32/MPEG-2  x32+x26+x23+x22+x16+x12+x11+x10+x8+x7+x5+x4+x2+x+1
 * Poly:  0x4C11DB7
 * Init:  0xFFFFFFF
 * Refin:   False
 * Refout:  False
 * Xorout:  0x0000000
 * Note:
 *****************************************************************************/
uint32_t crc32_mpeg_2(uint8_t *data, uint16_t length)
{
  uint8_t i;
  uint32_t crc = 0xffffffff;  // Initial value
  while(length--)
  {
    crc ^= (uint32_t)(*data++) << 24;// crc ^=(uint32_t)(*data)<<24; data++;
    for (i = 0; i < 8; ++i)
    {
      if ( crc & 0x80000000 )
        crc = (crc << 1) ^ 0x04C11DB7;
      else
        crc <<= 1;
    }
  }
  return crc;
}
crcLib.h文件
#ifndef __CRCLIB_H__
#define __CRCLIB_H__
#include "stdint.h"
uint8_t crc4_itu(uint8_t *data, uint16_t length);
uint8_t crc5_epc(uint8_t *data, uint16_t length);
uint8_t crc5_itu(uint8_t *data, uint16_t length);
uint8_t crc5_usb(uint8_t *data, uint16_t length);
uint8_t crc6_itu(uint8_t *data, uint16_t length);
uint8_t crc7_mmc(uint8_t *data, uint16_t length);
uint8_t crc8(uint8_t *data, uint16_t length);
uint8_t crc8_itu(uint8_t *data, uint16_t length);
uint8_t crc8_rohc(uint8_t *data, uint16_t length);
uint8_t crc8_maxim(uint8_t *data, uint16_t length);//DS18B20
uint16_t crc16_ibm(uint8_t *data, uint16_t length);
uint16_t crc16_maxim(uint8_t *data, uint16_t length);
uint16_t crc16_usb(uint8_t *data, uint16_t length);
uint16_t crc16_modbus(uint8_t *data, uint16_t length);
uint16_t crc16_ccitt(uint8_t *data, uint16_t length);
uint16_t crc16_ccitt_false(uint8_t *data, uint16_t length);
uint16_t crc16_x25(uint8_t *data, uint16_t length);
uint16_t crc16_xmodem(uint8_t *data, uint16_t length);
uint16_t crc16_dnp(uint8_t *data, uint16_t length);
uint32_t crc32(uint8_t *data, uint16_t length);
uint32_t crc32_mpeg_2(uint8_t *data, uint16_t length);
#endif // __CRCLIB_H__





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