51单片机实现Modbus从机程序Word下载.docx
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51单片机实现Modbus从机程序Word下载.docx
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constucharcodeauchCRCHi[]={
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};
constucharcodeauchCRCLo[]={
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};
/********************************************
\
Function:
CRC校验子函数
Input:
要校验的数组起始地址长度
Output:
16位校验码(高位在前)
********************************************/
uintcrccheck(uchar*puchMsg,ucharusDataLen)
{
ucharuchCRCHi=0xFF;
ucharuchCRCLo=0xFF;
~
ucharuIndex;
while(usDataLen--)
{
uIndex=uchCRCHi^*puchMsg++;
uchCRCHi=uchCRCLo^auchCRCHi[uIndex];
uchCRCLo=auchCRCLo[uIndex];
}
return(uchCRCHi<
8|uchCRCLo);
?
}
读线圈状态子函数
无
voidReadCoil(void)
{
uintStartAddress,tempAddress;
ucharCoilNum,i,ByteNum,j;
ucharCoilVal;
bitexit=0;
StartAddress=resvbuf[2];
StartAddress=StartAddress|resvbuf[3];
tempAddress=StartAddress;
;
CoilNum=resvbuf[5];
//读取的位数
ByteNum=CoilNum/8;
if(CoilNum%8!
=0)
ByteNum++;
Sendbuf[2]=ByteNum;
//返回的字节数
if(resvbuf[1]==0x01)
{
for(i=0;
i<
ByteNum;
i++)
&
{
Sendbuf[i+3]=0;
for(j=0;
j<
8;
j++)
{
CoilVal=GetCoilVal(StartAddress);
Sendbuf[i+3]|=CoilVal<
j;
StartAddress++;
if(StartAddress>
=tempAddress+CoilNum)
{
exit=1;
break;
}
}
if(exit==1)
break;
}
}
elseif(resvbuf[1]==0x02)
;
CoilVal=GetSWVal(StartAddress);
}
SendCount=5+ByteNum;
SendData();
读寄存器状态子函数
voidReadRegisters(void)
.
uintStartAddress;
ucharByteCount,i;
StartAddress=StartAddress<
8|resvbuf[3];
ByteCount=resvbuf[5]*2;
Sendbuf[2]=resvbuf[5];
if(resvbuf[1]==0x03)
!
ByteCount;
i+=2)
Sendbuf[i+4]=ReWrbuf[StartAddress]&
0xff;
Sendbuf[i+3]=ReWrbuf[StartAddress]>
StartAddress++;
elseif(resvbuf[1]==0x04)
Sendbuf[i+4]=ReOnlybuf[StartAddress];
Sendbuf[i+3]=ReOnlybuf[StartAddress];
SendCount=ByteCount+5;
强制单线圈子函数
voidForceSingalCoil(void)
"
uintAddress,OnOff;
bittemp,CoilVal;
Address=resvbuf[2]<
OnOff=resvbuf[4]<
8|resvbuf[5];
if(OnOff==0x0000)
CoilVal=0;
temp=SetCoilVal(Address,CoilVal);
elseif(OnOff==0xFF00)
CoilVal=1;
if(temp==1)
(
Sendbuf[2]=resvbuf[2];
Sendbuf[3]=resvbuf[3];
Sendbuf[4]=resvbuf[4];
Sendbuf[5]=resvbuf[5];
SendCount=8;
SendData();
else
Error=1;
强制单寄存器子函数
|
voidSetOneRegisterVal()
uintR_Address,RegisterVal;
bittemp1;
R_Address=resvbuf[2];
R_Address=R_Address<
RegisterVal=resvbuf[4];
RegisterVal=RegisterVal<
temp1=SetRegisterVal(R_Address,RegisterVal);
if(temp1==1)
[
}
读线圈值子函数
线圈地址
线圈的值
ucharGetCoilVal(uintAddress)
uintCoilAddress;
ucharCoilVal=0;
CoilAddress=Address;
switch(CoilAddress&
0x0f)
case0:
CoilVal=Coil1_bit0;
break;
case1:
CoilVal=Coil1_bit1;
case2:
CoilVal=Coil1_bit2;
case3:
CoilVal=Coil1_bit3;
case4:
CoilVal=Coil1_bit4;
case5:
CoilVal=Coil1_bit5;
]
case6:
CoilVal=Coil1_bit6;
case7:
CoilVal=Coil1_bit7;
case8:
CoilVal=Coil2_bit8;
case9:
CoilVal=Coil2_bit9;
case10:
CoilVal=Coil2_bit10;
case11:
CoilVal=Coil2_bit11;
case12:
CoilVal=Coil2_bit12;
case13:
CoilVal=Coil2_bit13;
case14:
CoilVal=Coil2_bit14;
case15:
CoilVal=Coil2_bit15;
default:
break;
returnCoilVal;
读开关值子函数
开关地址
开关值
ucharGetSWVal(uintAddress1)
ucharSW1,SW2=0xff;
SW1=P2;
Switch=SW2<
8|SW1;
switch(Address1&
CoilVal=Switch&
0x01;
CoilVal=Switch>
1&
2&
3&
!
4&
5&
6&
7&
8&
9&
CoilVal=Switch>
10&
11&
12&
13&
14&
15&
,
强制单线圈值子函数
线圈地址,强制值
结果值
bitSetCoilVal(uintAddress,bitVal)
。
bitresult=1;
switch(Address&
Coil1_bit0=Val;
Coil1_bit1=Val;
Coil1_bit2=Val;
Coil1_bit3=Val;
Coil1_bit4=Val;
b
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