modbus(C语言程序)(30页).doc

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modbus(C语言程序)(30页).doc

-modbus（C语言程序） 2009-10-15 09:31:28| 分类： |字号订阅#include <REGX52.H>#include<intrins.h>/_nop_();#define OSFREQ 11059200char TimeInterval;char MyAddress; char data DI6=1,2,3,4,5,6; char data DO6=6,7,8,9,10,11; char data AI6=11,12,13,14,15,16;char data AO6=16,17,18,19,20,21; unsigned char data ReceiveData14;unsigned char data countnumber;sbit Recenable =P16;/控制端 sbit led =P27;/控制端/*-函数说明：CRC 高位字节值表-*/static unsigned char code auchCRCHi = 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-*/static unsigned char code auchCRCLo = 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：unsigned int CRC16(unsigned char *puchMsg, unsigned int usDataLen)函数说明：CRC校验-*/unsigned int CRC16(unsigned char *puchMsg, unsigned int usDataLen) unsigned char uchCRCHi = 0xFF ; / 高CRC字节初始化 unsigned char uchCRCLo = 0xFF ; / 低CRC 字节初始化 unsigned uIndex ; / CRC循环中的索引 while (usDataLen-) / 传输消息缓冲区 uIndex = uchCRCHi *puchMsg+ ; / 计算CRC uchCRCHi = uchCRCLo auchCRCHiuIndex ; uchCRCLo = auchCRCLouIndex ; return (uchCRCHi << 8 | uchCRCLo) ;/*-调用方式：unsigned char getbit(unsigned int address,unsigned char function)函数说明：取出所给地址的位值-*/unsigned char getbit(unsigned int address,unsigned char function) unsigned char data Offset; unsigned char data temp; unsigned char data *Myaddress; Offset=(char)address&0x07; switch (function) /根据功能码不同进行相应处理 case 2: Myaddress=DI; break; case 1: Myaddress=DO; break; default: return 2; temp=(char)(address>>3); temp=*(Myaddress+temp); temp>>=(Offset); if (temp&0x01) return 1; else return 0;/*-调用方式：void SendData(unsigned char *output,unsigned char Outlength)函数说明：发送数据至窗口-*/void SendData(unsigned char *output,unsigned char Outlength) ES=0; while(Outlength-) TI=0; ACC=*output; TB8=P; SBUF=*(output+); while(!TI); TI=0; ES=1;/*-调用方式：void Function12(unsigned char address,unsigned char len)函数说明：功能码1，2处理-*/void Function12(unsigned char address,unsigned char len) unsigned int data i; unsigned char data j; unsigned char data length; unsigned char data *send; unsigned int data temp; unsigned char data function; length=0; send=ReceiveData; function=send1; 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)<<j; 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：void Function3(unsigned char address,unsigned char len)函数说明：功能码3处理-读取寄存器-*/void Function3(unsigned char address,unsigned char len) unsigned char data i; unsigned char data *send; unsigned int data temp; send=ReceiveData; *(send+2)=2*len; /数据长度高 address=2*address; for(i=0;i<len;i+) /取输入寄存器数据 *(send+3+2*i)=AOaddress+; *(send+4+2*i)=AOaddress+; 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：void Function4(unsigned char address,unsigned char len)函数说明：功能码处理4-读取输入寄存器-*/void Function4(unsigned char address,unsigned char len) unsigned char data i; unsigned char data *send; unsigned int data temp; send=ReceiveData; *(send+2)=2*len; address=2*address; for(i=0;i<len;i+) /取数据 *(send+4+2*i)=AIaddress+; *(send+3+2*i)=AIaddress+; 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：void Function6(unsigned char address)函数说明：写单路寄存器-*/void Function6(unsigned char address) int temp; unsigned char data *WriteData; temp=2*address; WriteData=AO; /将写入的数据进行处理 /your code to add here to deal with the write value *(WriteData+temp)=ReceiveData4; *(WriteData+temp+1)=ReceiveData5; SendData(ReceiveData,countnumber); /调用发送程序，返回与主机相同的报文/*-调用方式：void SendError(char ErrorCode)函数说明：-*/void SendError(char ErrorCode) unsigned char data *send; unsigned int data temp; send=ReceiveData; *(send+1)=ReceiveData1|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：void Deal()函数说明：接收数据处理-*/void Deal() unsigned int data temp; unsigned char data address; unsigned char data length; unsigned char data counter; unsigned char data *Pointer; Pointer=ReceiveData; counter=countnumber; if (counter<=3 ) return; temp=Pointercounter-2<<8; temp= temp|Pointercounter-1; if( temp=CRC16(Pointer,counter-2) /较验正确 address=Pointer3; length=Pointer5; if(address<48) switch (Pointer1) /根据功能码不同进行相应处理*/ case 1: Function12(address,length); break; case 2: Function12(address,length); break; case 3: address=address-1; Function3(address,length); break; case 4: address=address-1; Function4(address,length); break; case 6: address=address-1; Function6(address); default: SendError(0x81); break; else SendError(0x82); countnumber=0;/*bit Chargetbit(unsigned char character,unsigned char Number) if(character>>Number&0x01=1) return 1; else return 0;/设定某一位的值*unsigned char SetBit(unsigned char Character,unsigned char num,bit boolen) unsigned char code bit_value=1,2,4,8,16,32,64,128; if(boolen) return Character|bit_valuenum; else return Character&bit_valuenum;*/*-调用方式：void Init_timer2(unsigned int baudrate)函数说明：定时器2的初始化-*/void Init_timer2(unsigned int baudrate) unsigned int data TimReg2; T2CON = 0x00; T2MOD = 0x00; TimReg2=65536-(OSFREQ/384/baudrate*11); RCAP2L=TimReg2&0x00ff; RCAP2H=(TimReg2>8); /RCAP2H=TimReg2/256 RCAP2L=0; RCAP2H=0; TL2 = RCAP2L; / TH2 = RCAP2H; / TR2=1; / T2CON.2 start timer ET2=0; / 开定时器2中断/*-调用方式：void Init_SerialPort(unsigned int baudrate)函数说明：串口初始化-*/void Init_SerialPort(unsigned int baudrate) unsigned char TimReg2; SCON = 0xd0; / 方式3, 8-bit UART, enable rcvr TMOD = 0x21; / T0方式1（16位）, T1方式2,8位重装 TimReg2=256-(OSFREQ/384/baudrate); TH1 = TimReg2; / 定时器1,在11.0592MHz下,波特率为9600 TL1 = TH1; TR1= 1; / TR1: 定时开始 /PS=1; / 串行中断优先 ES=1; / 接收中断/*-函数说明：主函数-*/main() EA=1; /开总中断 Init_SerialPort(9600); Init_timer2(9600); Recenable=0; /接收允许 MyAddress=0x01; /本机地址 while(1) /*-调用方式：void SeiralA() interrupt 4 using 0函数说明：通讯中断-*/void SeiralA() interrupt 4 using 0 if(RI) if(TimeInterval>2)&&(TimeInterval<=4) countnumber=0; if(countnumber>60) countnumber=0; ReceiveDatacountnumber+=SBUF; /将接收到的数据到缓冲区内 TimeInterval=0; RI=0; ET2=1; /当接收到数据后,将定时器2开启 /*-调用方式：void SerialPortTime() interrupt 5 using 0函数说明：定时器2中断程序-*/void SerialPortTime() interrupt 5 using 0 ET2=0; /定时器2中断允许控制 TimeInterval=TimeInterval+1; if(TimeInterval>4) && countnumber) Recenable=1; /发送 Deal(); /将接收到的数据进行处理 Recenable=0; /接收 countnumber=0; else ET2=1; /将定时器2打开 TF2=0; /定时器2溢出标志,软件清0第 32 页-

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