MODBUS通讯+C语言源代码Word格式.docx

MODBUS通讯+C语言源代码Word格式.docx

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*需储存的参数：

*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<

count;

i++） 

{ 

dest[i]=src[i];

} 

dest[i]='

\0'

;

} 

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

bitmcpy（） 

（1）开关量数组拷贝；

*[2006-3-714:

59] 

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

strmcmp（） 

（1）字符数组比较；

相同则返回0，不相同则返回1；

41] 

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

if（str1[i]!

=str2[i]） 

return1;

return0;

Datamcmp（） 

（1）浮点数组比较；

*[2006-3-618:

05] 

*[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） 

Bitmcmp（） 

（1）开关量数组比较；

10] 

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

if（data1[i]!

=data2[i]） 

GetCRC16（） 

（1）CRC16校验；

返回校验码；

*[2005-11-2816:

40] 

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, 

0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41, 

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, 

0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0, 

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）;

SendRtuCmdToModBus（） 

无 

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

*[2006-3-19:

02] 

返回类型改为void；

voidSendRtuCmdToModBus（intModPort,unsignedcharcmd[],unsignedshortlen） 

unsignedshortCRC16;

CRC16=GetCRC16（cmd,len）;

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