MODBUS通讯+C语言源代码.docx

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MODBUS通讯+C语言源代码.docx

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MODBUS通讯+C语言源代码.docx

MODBUS通讯+C语言源代码

盛年不重来,一日难再晨。

及时宜自勉,岁月不待人。

/*********************************************************************************/ 

/*函数名称:

strmcpy()              

*输入参数:

 共 个参数; 

*输出参数:

 共 个参数; 

*返回值:

  

*需储存的参数:

共 个参数;   

*功能介绍:

  

    

(1)字符数组拷贝;        

*修改日志:

 

*[2006-3-617:

07] Ver.1.00 

    开始编写; 

    完成;                   

/*                   */ 

/*********************************************************************************/ 

 

voidstrmcpy(unsignedchardest[],unsignedcharsrc[],intcount) 

  inti; 

   

  for(i=0;i

  { 

    dest[i]=src[i]; 

  } 

  dest[i]='\0'; 

 

/*****************************************************************************/ 

 

 

/*********************************************************************************/ 

/*函数名称:

bitmcpy()              

*输入参数:

 共 个参数; 

*输出参数:

 共 个参数; 

*返回值:

  

*需储存的参数:

共 个参数;   

*功能介绍:

  

    

(1)开关量数组拷贝;    

*修改日志:

 

*[2006-3-714:

59] Ver.1.00 

    开始编写; 

    完成;                   

/*                   */ 

/*********************************************************************************/ 

 

voidbitmcpy(intdest[],intsrc[],intcount) 

  inti; 

   

  for(i=0;i

  { 

    dest[i]=src[i]; 

  } 

 

/*****************************************************************************/ 

 

 

/*********************************************************************************/ 

/*函数名称:

strmcmp()              

*输入参数:

 共 个参数; 

*输出参数:

 共 个参数; 

*返回值:

  

*需储存的参数:

共 个参数;   

*功能介绍:

  

    

(1)字符数组比较;相同则返回0,不相同则返回1;        

*修改日志:

 

*[2006-3-617:

41] Ver.1.00 

    开始编写; 

    完成;                   

/*                   */ 

/*********************************************************************************/ 

 

intstrmcmp(unsignedcharstr1[],unsignedcharstr2[],intcount) 

  inti; 

   

  for(i=0;i

  { 

    if(str1[i]!

=str2[i]) 

    { 

      return1;     

    } 

  } 

  return0; 

 

/*****************************************************************************/ 

 

 

/*********************************************************************************/ 

/*函数名称:

Datamcmp()              

*输入参数:

 共 个参数; 

*输出参数:

 共 个参数; 

*返回值:

  

*需储存的参数:

共 个参数;   

*功能介绍:

  

    

(1)浮点数组比较;相同则返回0,不相同则返回1;        

*修改日志:

 

*[2006-3-618:

05] Ver.1.00 

    开始编写; 

    完成;   

*[2006-3-913:

52] 

    加了一层括号,以前是错误的 

    if(!

((data1[i]-data2[i]<0.0001)&&(data1[i]-data2[i]>-0.0001)))                    

/*                   */ 

/*********************************************************************************/ 

 

intDatamcmp(floatdata1[],floatdata2[],intcount) 

  inti; 

   

  for(i=0;i

  { 

    if(!

((data1[i]-data2[i]<0.0001)&&(data1[i]-data2[i]>-0.0001))) 

    { 

      return1;     

    } 

  } 

  return0; 

 

/*****************************************************************************/ 

 

/*********************************************************************************/ 

/*函数名称:

Bitmcmp()              

*输入参数:

 共 个参数; 

*输出参数:

 共 个参数; 

*返回值:

  

*需储存的参数:

共 个参数;   

*功能介绍:

  

    

(1)开关量数组比较;相同则返回0,不相同则返回1;        

*修改日志:

 

*[2006-3-618:

10] Ver.1.00 

    开始编写; 

    完成;                   

/*                   */ 

/*********************************************************************************/ 

 

intBitmcmp(intdata1[],intdata2[],intcount)  

{  

  inti; 

   

  for(i=0;i

  { 

    if(data1[i]!

=data2[i]) 

    { 

      return1;     

    } 

  } 

  return0; 

 

/*****************************************************************************/ 

 

 

/*********************************************************************************/ 

/*函数名称:

GetCRC16()              

*输入参数:

 共 个参数; 

*输出参数:

 共 个参数; 

*返回值:

  

*需储存的参数:

共 个参数;   

*功能介绍:

  

    

(1)CRC16校验;返回校验码;        

*修改日志:

 

*[2005-11-2816:

40]  Ver.1.00 

    开始编写; 

    完成;                   

/*                   */ 

/*********************************************************************************/ 

 

unsignedshortGetCRC16(unsignedchar*puchMsg,unsignedshortusDataLen)  

{  

  /*CRC高位字节值表*/  

  unsignedcharauchCRCHi[256]={ 

  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 

  };  

   

  unsignedcharauchCRCLo[256]={ 

  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 

  }; 

   

  unsignedcharuchCRCHi=0xFF;/*高CRC字节初始化*/  

  unsignedcharuchCRCLo=0xFF;/*低CRC字节初始化*/  

  unsigneduIndex=0;/*CRC循环中的索引*/  

   

  while(usDataLen--)/*传输消息缓冲区*/  

  {  

    uIndex=uchCRCHi^*puchMsg++;/*计算CRC*/  

    uchCRCHi=uchCRCLo^auchCRCHi[uIndex];  

    uchCRCLo=auchCRCLo[uIndex];  

  }  

  return(unsignedshort)((unsignedshort)uchCRCHi<<8|uchCRCLo);  

}  

/*****************************************************************************/ 

 

 

/*********************************************************************************/ 

/*函数名称:

SendRtuCmdToModBus()               

*输入参数:

 共 个参数; 

*输出参数:

 共 个参数; 

*返回值:

 无 

*需储存的参数:

共 个参数;   

*功能介绍:

  

    

(1)发送ModBusRTU指令到ModbusSlave,加上CRC16校验码;         

*修改日志:

 

*[2005-11-2816:

40]  Ver.1.00 

    开始编写; 

    完成; 

*[2006-3-19:

02] 

    返回类型改为void;                   

/*                   */ 

/*********************************************************************************/ 

 

voidSendRtuCmdToModBus(intModPort,unsignedcharcmd[],unsignedshortlen) 

{  

  unsignedshortCRC16; 

   

  CRC16=GetCRC16(cmd,len); 

  ToCom

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