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标题: 51通讯协议—CRC16校验 [打印本页]

作者: yuyang911220 时间: 2015-6-24 21:49 标题: 51通讯协议—CRC16校验

#include "at89x52.h"
/***************************************************
*       类型定义，方便代码移植
***************************************************/
typedef unsigned char UINT8;
typedef unsigned int UINT16;
typedef unsigned long UINT32;

typedef char          INT8;
typedef int          INT16;
typedef long          INT32;
typedef bit          BOOL;
/***************************************************
*       大量宏定义，便于代码移植和阅读
***************************************************/
//-------------------------------- //----头部----
#define DCMD_CTRL_HEAD1    0x10  //PC下传控制包头部1
#define DCMD_CTRL_HEAD2    0x01  //PC下传控制包头部2
                                 //----命令码----
#define DCMD_NULL          0x00  //命令码:空操作
#define DCMD_CTRL_BELL    0x01  //命令码:控制蜂鸣器
#define DCMD_CTRL_LED       0x02  //命令码:控制LED
#define DCMD_REQ_DATA       0x03  //命令码:请求数据
                                 //----数据----
#define DCTRL_BELL_ON       0x01  //蜂鸣器响
#define DCTRL_BELL_OFF    0x02  //蜂鸣器禁鸣
#define DCTRL_LED_ON       0x03  //LED亮
#define DCTRL_LED_OFF       0x04  //LED灭
//--------------------------------
                                 //----头部----
#define UCMD_CTRL_HEAD1    0x20  //MCU上传控制包头部1
#define UCMD_CTRL_HEAD2    0x01  //MCU上传控制包头部2
                                 //----命令码----
#define UCMD_NULL          0x00  //命令码:空操作
#define UCMD_REQ_DATA       0x01  //命令码:请求数据
#define CTRL_FRAME_LEN    0x04  //帧长度(不包含数据和校验值)
#define CRC16_LEN          0x02  //检验值长度
#define EN_UART()          ES=1 //允许串口中断
#define NOT_EN_UART()       ES=0 //禁止串口中断
#define BELL(x)          {if((x))P0_6=1 ;else P0_6=0;} //蜂鸣器控制宏函数
#define LED(x)             {if((x))P2=0x00;else P2=0xFF;}//LED控制宏函数
#define TRUE             1
#define FALSE             0
#define HIGH             1
#define LOW                0
#define ON                1
#define OFF                0
#define NULL             (void *)0
//使用结构体对数据包进行封装方便操作数据
typedef  struct _PKT_CRC
{
UINT8 m_ucHead1;    //首部1
UINT8 m_ucHead2;    //首部2
UINT8 m_ucOptCode;    //操作码
UINT8 m_ucDataLength;  //数据长度
UINT8 m_szDataBuf[16]; //数据
UINT8 m_szCrc[2];    //CRC16为2个字节
}PKT_CRC;
//使用共用体再一次对数据包进行封装操作数据更加方便
typedef union _PKT_CRC_EX
{
PKT_CRC r;
UINT8 p[32];
} PKT_CRC_EX;
PKT_CRC_EX PktCrcEx; //定义数据包变量
code UINT16 szCRC16Tbl[256] = {
0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,/*注意本行的0x1021 */
0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
};

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