modbusC语言程序.docx
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modbusC语言程序
modbus（C语言程序）
默认分类字号 订阅
#include
#include//_nop_（）;
#define OSFREQ11059200
charTimeInterval;
charMyAddress;
chardataDI[6]={1,2,3,4,5,6};
chardataDO[6]={6,7,8,9,10,11};
chardataAI[6]={11,12,13,14,15,16};
chardataAO[6]={16,17,18,19,20,21};
unsignedchardataReceiveData[14];
unsignedchardata countnumber;
sbitRecenable =P1^6;//控制端
sbitled =P2^7;//控制端
/*---------------------------------------------------------------------------
函数说明：
CRC高位字节值表
---------------------------------------------------------------------------*/
staticunsignedcharcodeauchCRCHi[]={
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
};
/*---------------------------------------------------------------------------
函数说明：
CRC低位字节值表
---------------------------------------------------------------------------*/
staticunsignedcharcodeauchCRCLo[]={
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
};
/*---------------------------------------------------------------------------
调用方式：
unsignedintCRC16（unsignedchar*puchMsg,unsignedintusDataLen）
函数说明：
CRC校验
---------------------------------------------------------------------------*/
unsignedintCRC16（unsignedchar*puchMsg,unsignedintusDataLen）
{
unsignedcharuchCRCHi=0xFF; //高CRC字节初始化
unsignedcharuchCRCLo=0xFF; //低CRC字节初始化
unsigneduIndex; //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（uchCRCHi<<8|uchCRCLo）;
}
/*---------------------------------------------------------------------------
调用方式：
unsignedchargetbit（unsignedint address,unsignedchar function）
函数说明：
取出所给地址的位值
---------------------------------------------------------------------------*/
unsignedchargetbit（unsignedint address,unsignedchar function）
{
unsignedchardataOffset;
unsignedchardatatemp;
unsignedchardata*Myaddress;
Offset=（char）address&0x07;
switch（function） //根据功能码不同进行相应处理
{
case2:
Myaddress=DI;
break;
case1:
Myaddress=DO;
break;
default:
return2;
}
temp=（char）（address>>3）;
temp=*（Myaddress+temp）;
temp>>=（Offset）;
if（temp&0x01）
return1;
else
return0;
}
/*---------------------------------------------------------------------------
调用方式：
voidSendData（unsignedchar *output,unsignedchar Outlength）
函数说明：
发送数据至窗口
---------------------------------------------------------------------------*/
voidSendData（unsignedchar *output,unsignedchar Outlength）
{
ES=0;
while（Outlength--）
{
TI=0;
ACC=*output;
TB8=P;
SBUF=*（output++）;
while（!
TI）;
TI=0;
}
ES=1;
}
/*---------------------------------------------------------------------------
调用方式：
voidFunction12（unsignedcharaddress,unsignedcharlen）
函数说明：
功能码1，2处理
---------------------------------------------------------------------------*/
voidFunction12（unsignedcharaddress,unsignedcharlen）
{
unsignedintdatai;
unsignedchardataj;
unsignedchardatalength;
unsignedchardata*send;
unsignedintdatatemp;
unsignedchardatafunction;
length=0;
send=ReceiveData;
function=send[1];
for（i=1;i<=len;i++）
{
length++;
*（send+2+length）=0;
for（j=0;j<8;j++）
{
*（send+2+length）=*（send+2+length）|getbit（address,function）< address++;
i++;
if（i>len）break;
}
i--;
}
*（send+2）=length; //数据长度
temp=CRC16（send,length+3）; //DI状态数据
*（send+3+length）=（char）（temp>>8）; //CRC校验高
*（send+4+length）=（char）temp; //CRC校验低
SendData（send,length+5）; //调用A发送程序
}
/*---------------------------------------------------------------------------
调用方式：
voidFunction3（unsignedchar address,unsignedchar len）
函数说明：
功能码3处理-----读取寄存器
---------------------------------------------------------------------------*/
voidFunction3（unsignedchar address,unsignedchar len）
{
unsignedchardatai;
unsignedchardata*send;
unsignedintdatatemp;
send=ReceiveData;
*（send+2）=2*len; //数据长度高
address=2*address;
for（i=0;i {
*（send+3+2*i）=AO[address++];
*（send+4+2*i）=AO[address++];
}
temp=CRC16（send,2*len+3）; //CRC校验
*（send+3+2*len）=（char）（temp>>8）;
*（send+4+2*len）=（char）temp;
SendData（send,2*len+5）; //调用A发送程序
}
/*---------------------------------------------------------------------------
调用方式：
voidFunction4（unsignedchar address,unsignedchar len）
函数说明：
功能码处理4----读取输入寄存器
---------------------------------------------------------------------------*/
voidFunction4（unsignedchar address,unsignedchar len）
{
unsignedchardatai;
unsignedchardata*send;
unsignedintdatatemp;
send=ReceiveData;
*（send+2）=2*len;
address=2*address;
for（i=0;i {
*（send+4+2*i）=AI[address++];
*（send+3+2*i）=AI[address++];
}
temp=CRC16（send,2*len+3）;
*（send+3+2*len）=（char）（temp>>8）;
*（send+4+2*len）=（char）temp;
SendData（send,2*len+5）;
}
/*---------------------------------------------------------------------------
调用方式：
voidFunction6（unsignedcharaddress）
函数说明：
写单路寄存器
---------------------------------------------------------------------------*/
voidFunction6（unsignedcharaddress）
{
inttemp;
unsignedchardata*WriteData;
temp=2*address;
WriteData=AO;
//将写入的数据进行处理
//yourcodetoaddheretodealwiththewritevalue
*（WriteData+temp）=ReceiveData[4];
*（WriteData+temp+1）=ReceiveData[5];
SendData（ReceiveData,countnumber）; //调用发送程序，返回与主机相同的报文
}
/*---------------------------------------------------------------------------
调用方式：
voidSendError（charErrorCode）
函数说明：
---------------------------------------------------------------------------*/
voidSendError（charErrorCode）
{
unsignedchardata*send;
unsignedintdatatemp;
send=ReceiveData;
*（send+1）=ReceiveData[1]|0x01;//最高位置1
*（send+2）=ErrorCode;
temp=CRC16（send,3）;
*（send+3）=（char）（temp>>8）;
*（send+4）=（char）temp;
SendData（send,countnumber）; //调用发送程序,返回错误代码
}
/*---------------------------------------------------------------------------
调用方式：
voidDeal（）
函数说明：
接收数据处理
---------------------------------------------------------------------------*/
voidDeal（）
{
unsignedintdatatemp;
unsignedchardataaddress;
unsignedchardatalength;
unsignedchardatacounter;
unsignedchardata*Pointer;
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