单片机与昆仑通态通讯

/***********************************************备注：modbusRTU协议，rs485通讯单片机为从机PLC或者PC为上位机*********************************************/#includereg52.h#defineucharunsignedchar#defineuintunsignedintsbitrx_led=P0^0;//接收指示灯sbittx_led=P0^1;//发送指示灯sbitctrl_485=P3^2;//485接发发送转换控制sbitdm=P1^4;sbitwm=P1^5;sbitled_cs=P1^6;sbitb7=P2^7;//波特率设置位unsignedintcrc=0;ucharsendBuf[20],receive_count=0,a[10];ucharsend_count=0,send_num=0,addr_dip=0;ucharaaa,bbb;uintcrc16(unsignedchar*puchMsg,unsignedintusDataLen);voidbeginsend(void);voidcheck_modbus(void);voiddisplay(uintdate);voiddelay(uintz);ucharcodeduan[]={0x3F,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7C,0x39,0x5E,0x79,0x71};//此数组为!!!0~9ABCDEF!!!ucharcodewei[]={0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07};//此数组表示数码管显示的位数voiddisplay(uintdate)//num表示在第几位显示words表示显示的字符{P2=duan[date/100];P1=wei[0];delay(1);P1=0xff;P2=duan[date%100/10];P1=wei[1];delay(1);P1=0xff;P2=duan[date%10];P1=wei[2];delay(1);}/*************延时*****************/voiddelay(uintz){uintx,y;for(x=z;x0;x--)for(y=113;y0;y--);}/************串口初始化*****************/voiduart_init(void){TMOD=0x20;//定时器1，模式2SCON=0x50;//串口通讯方式1TH1=0xfd;//波特率9600TL1=0xfd;if(b7==1)PCON=0x00;elsePCON=0x80;TI=0;//发送中断标志位清零RI=0;//接收中断标志位清零TR1=1;//启动定时器1EA=1;ES=1;}/**************定时器0初始化**************/voidtimer0_init(void){TMOD=TMOD&0xf0;TMOD=TMOD|0x01;TH0=0;//16位定时计数器TL0=0;ET0=1;//允许定时器中断}voidmain(void){dm=0;wm=0;led_cs=1;uart_init();timer0_init();ctrl_485=0;//先置为接收while(1){RI=0;delay(1);rx_led=1;tx_led=1;if(P2^0==0)bbb++;if(bbb==10)aaa++;display(aaa);}}voidbeginsend(void){ctrl_485=1;//开始置位发送状态TI=0;send_count=0;SBUF=sendBuf[0];send_num--;}voidtime0()interrupt1///定时器中断{TR0=0;RI=0;check_modbus();receive_count=0;}voidser()interrupt4{if(TI){if(send_countsend_num){TI=0;tx_led=0;SBUF=sendBuf[++send_count];}else{receive_count=0;ctrl_485=0;TI=0;}}elseif(RI){RI=0;rx_led=0;TR0=1;a[receive_count++]=SBUF;TH0=0xf4;TL0=0x1e;}}voidcheck_modbus(void){uchardi,addr;if(receive_count7)////////////////////address0300000001crccrc{receive_count=0;crc=crc16(a,6);addr=1;//仪表栈号设置为1//addr=P24;//addr=~(addr&0x0f);//addr=addr&0x0f;//di=~(P2&0X0f);//di=di&0x0f;di=aaa;if(a[0]==addr&&a[1]==0x03&&(crc==((a[7]&0x00ff)|(0xff00&(a[6]8))))){sendBuf[0]=a[0];sendBuf[1]=a[1];sendBuf[2]=0x02;//数据长度为2sendBuf[3]=0x00;//数据高八位为0sendBuf[4]=di;//数据低八位为P2口数据crc=crc16(sendBuf,5);//计算5个数据的CRC校验码sendBuf[5]=crc8;sendBuf[6]=crc&0xff;send_num=7;beginsend();}}}/***********************CRC校验*************************///CRC高位字节值表unsignedcharcodeauchCRCHi[260]={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unsignedcharcodeauchCRCLo[260]={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,0x8