danpianjiyu-PLC.zip_MODBUSPLC_modbus_modbus485_modbusa

共1个文件

txt：1个

版权申诉

modbus

29 浏览量 2022-09-24 20:28:06 上传评论收藏 3KB ZIP 举报

资源详情

资源评论

资源推荐

收起资源包目录

danpianjiyu-PLC.zip （1个子文件）

danpianjiyu-PLC.txt 7KB

#include <AT89X52.H> #include <intrins.h> #define Uint16 unsigned int #define Uint32 unsigned long #define uchar unsigned char unsigned char temp8; Uint16 temp16; sbit led2=P1^3; sbit led1=P1^4; sbit reving=P1^6; sbit rw=P1^0; //487收发控制端 /*** sbit SCL2=P1^1; //SCL2定义为P1口的第3位脚，连接ADC0831SCL脚 sbit SDA2=P1^2; //SDA2定义为P1口的第4位脚，连接ADC0831SDA脚 sbit CS2=P1^0; //CS2定义为P1口的第4位脚，连接ADC0831CS脚 ***/ void InitUART(void); //串口初始化 void SendOneByte(unsigned); //串口发送数据 void mdproc(uchar); //接收数据处理 unsigned char ad0831read(void); //定义该函数为读取模数转换的数据 Uint16 Crc16(Uint16 *puchMsg, Uint16 usDataLen); //crc校验 uchar node; uchar mtx[11],mrx[10]; //从机接收数据存放 uchar send101[9]={0x00,0x03,0x06,0x00,0x00,0x00,0x00,0x00,0x00}; //从机待发数据存放 uchar timercnt; //时间间隔 // modbus协议定义 : uchar byterev; bit nodeok; uchar revptr; bit crcok; uchar datalen; bit procok; Uint16 delaycnt; /* CRC 高位字节值表 */ const Uint16 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 } ; /* CRC低位字节值表*/ const Uint16 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 } ; Uint16 Crc16(uchar *puchMsg, Uint16 usDataLen) //获取crc高8位和低8位 { Uint16 uchCRCHi = 0xFF ; /* 高CRC字节初始化 */ Uint16 uchCRCLo = 0xFF ; /* 低CRC 字节初始化 */ Uint16 temp16; Uint32 uIndex ; /* CRC循环中的索引 */ while (usDataLen--) /* 传输消息缓冲区 */ { temp16=*puchMsg++; uIndex = uchCRCHi ^ temp16 ; /* 计算CRC */ uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ; uchCRCLo = auchCRCLo[uIndex] ; } return (uchCRCHi << 8 | uchCRCLo) ; } void UARTInterrupt(void) interrupt 4 using 2 //串口中断处理函数 { if(RI==1) { RI = 0; byterev=SBUF; mdproc(byterev); } else TI = 0; } void mdproc(uchar b) //功能码03处理 ,如果地址正确 ,接收报文并crc检查 , crc检查正确 ,向plc主机发送数据 { Uint16 temp16_1,temp16_2; if(b==0x12) { datalen=7; mrx[0]=b; revptr=1; } else { mrx[revptr++]=b; if(revptr==8) { temp16_1=Crc16(mrx,6); temp16_2=mrx[6]; temp16_2<<=8; temp16_2|=mrx[7]; if(temp16_1==temp16_2) { crcok=1; led2=0; } } } } void SendOneByte(unsigned char c) { SBUF = c; while(!TI); TI = 0; } void InitUART(void)//串口初始化 9.6kb/S { TMOD = 0x20; //T1方式2 （8位T/C，TL用于计数，当TL溢出时将TH中的值自动写入TL） SCON = 0x50;//串口工作方式1，允许串口接收 TH1 = 256 - (11059200/12/32)/9600; //定时器初值高8位设置 TL1 = TH1; //定时器初值低8位设置 PCON = 0x00; //频率不加倍 ET1 = 0; EA = 1;//开总中断 ES = 1;//开串口中断 TR1 = 1;//启动T1 } void DelayM(unsigned int a){ //延时函数 1MS/次 unsigned char i; while( --a != 0){ for(i = 0; i < 125; i++); } } unsigned char ad0831read(void)//AD转换值 { unsigned char i=0,tmp=0; /**** SDA2=1; CS2=0; _nop_(); _nop_(); SCL2=0; _nop_(); _nop_(); SCL2=1; _nop_(); _nop_(); SCL2=0; _nop_(); _nop_(); SCL2=1; _nop_(); _nop_(); SCL2=0; _nop_(); _nop_(); for(i=0;i<8;i++){ tmp<<=1; if(SDA2) tmp++; SCL2=1; _nop_(); _nop_(); SCL2=0; _nop_(); _nop_(); } CS2=1; *****/ return tmp; } void main(void) { InitUART(); crcok=0; nodeok=0; timercnt=0x00; datalen=0; send101[0]=0x12; //从机地址 led2=0; DelayM(1000); led2=1; DelayM(1000); rw=0; //487收发控制端 while(1) {/* if(crcok==1) //接收数据处理时间完毕 { reving=1; led1=1; send101[3]=0x01; send101[4]=0x02; send101[5]=ad0831read(); //获取 ADC 数据 for(i=0;i<9;i++){mtx[i]=send101[i];} temp16=Crc16(send101,9); mtx[9]=(temp16>>8)&0x00ff; mtx[10]=temp16&0x00ff; rw=1; //487允许发送 for(i=0;i<11;i++) { temp8=mtx[i]; SendOneByte(temp8); } crcok=0; rw=0; //487允许接收 reving=0; // 收到报文并回复时，点亮led }*/ } }