stc12c560 modbus主站代码

/************************宏定义*******************************************/ #define MAIN_Fosc 11059200L //System frequency #define Baudrate1 9600 //define the baudrate, 如果使用BRT做波特率发生器,则波特率跟串口2一样 #define Baudrate2 19200 //define the baudrate2, #define BUF_LENTH 128 #define valnum 25 /*******************************************************************/ #include <STC12C5A60S2.H> #include<stdio.h> #include<stdlib.h> #include<string.h> /************************变量声明*******************************************/ sbit buzz=P2^7; unsigned char comm_len=0; unsigned char endflag = 0; unsigned char RX2_Rcv_Flag=0; unsigned char uart2_wr; //写指针 unsigned char uart2_rd; //读指针 unsigned char xdata RX2_Buffer[BUF_LENTH]={0}; bit B_TI2; unsigned char uart1_wr; //写指针 unsigned char uart1_rd; //读指针 unsigned char xdata RX1_Buffer[BUF_LENTH]={0}; unsigned char xdata RX11_Buffer[valnum]={0}; bit B_TI; char *p0="t"; char *p1=".txt="; char lcd_cmd[30]={0}; char *p2=".bco="; float xdata Curval[valnum]={1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}; unsigned char xdata stopflag[valnum]={0};//延时计数器，对应每一路，通过count计数 unsigned char xdata timeflag[valnum]={0}; unsigned char buff[8]={0x01,0x03,0x01,0x30,0x00,0x0F,0x00,0x00}; //unsigned char buff1[8]={0x01,0x03,0x01,0x30,0x00,0x0F,0x00,0x00};//保存MODBUS发送数据帧 unsigned char buff1[8]={0x02,0x03,0x01,0x30,0x00,0x09,0x00,0x00}; unsigned int i=0; unsigned char rcv1_okflag;//判断MH912应答 unsigned char rcv2_okflag;//判断MH912应答 char disflag=0; unsigned char hour,minute,second; unsigned char count; /*******************************************************************/ #define T1_TimerReload (256 - MAIN_Fosc / 192 / Baudrate1) //Calculate the timer1 reload value at 12T mode #define BRT_Reload (256 - MAIN_Fosc / 12 / 16 / Baudrate2) //Calculate BRT reload value #define TimeOut1 (28800 / (unsigned long)Baudrate1 + 2) #define TimeOut2 (28800 / (unsigned long)Baudrate2 + 2) #define TI2 (S2CON & 0x02) != 0 #define RI2 (S2CON & 0x01) != 0 #define CLR_TI2() S2CON &= ~0x02 #define CLR_RI2() S2CON &= ~0x01 /**********************函数声明*********************************************/ void lcd_display(int tnum,float dat); unsigned int crc16_table(unsigned char *ptr, unsigned char len); /**********************延时函数*********************************************/ void delayms(int count) { int i,j; for(i=0;i<count;i++) for(j=0;j<1000;j++); } /*******************字符发送函数************************************************/ void UART2_TxByte(unsigned char dat) { B_TI2 = 0; S2BUF = dat; while(!B_TI2); B_TI2 = 0; } void UART1_TxByte(unsigned char dat) { B_TI = 0; SBUF = dat; while(!B_TI); B_TI = 0; } void UART_Send_END(void) { UART2_TxByte(0xFF); UART2_TxByte(0xFF); UART2_TxByte(0xFF); } void UART1_Send_END(void) { UART1_TxByte(0xFF); UART1_TxByte(0xFF); UART1_TxByte(0xFF); } void UART_Send_start(void) { delayms(10); UART_Send_END(); delayms(10); } void PrintString1(unsigned char *puts) //发送一串字符串 { for (; *puts != 0; puts++) UART1_TxByte(*puts); //遇到停止符0结束 } void PrintString2(unsigned char *puts) //发送一串字符串 { for (; *puts != 0; puts++) UART2_TxByte(*puts); //遇到停止符0结束 } /*******************************************************************/ /******************串1初始化****************************/ void uart1_init(void) { PCON |= 0x80; //UART0 Double Rate Enable SCON = 0x50; //UART0 set as 10bit , UART0 RX enable TMOD &= ~(1<<6); //Timer1 Set as Timer, 12T//定时器模式控制 TMOD = (TMOD & ~0x30) | 0x20; //Timer1 set as 8 bits auto relaod TH1 = T1_TimerReload; //Load the timer TR1 = 1;//定时器允许位 ES = 1; EA = 1; } /******************串2初始化****************************/ void uart2_init(void) { AUXR |= (1 << 3); //串口2波特率加倍 S2CON = (S2CON & 0x3f) | (1<<6); //串口2模式1，8位UART，(2^S2SMOD / 32) * BRT溢出率01111111 01000000 S2CON |= 1 << 4; //允许串2接收 AUXR |= 1 << 4; //baudrate use BRT BRT = BRT_Reload; IE2 |= 1; //允许串口2中断 } /******************定时器初始化****************************/ void Time0_init() { TMOD|=0x01; TH0=(65536-46083)/256; TL0=(65536-46083)%256; EA=1; ET0=1; TR0=1; } /************断路指示**********************/ void disconnet_displa(int stopnum,long int dat) { sprintf(lcd_cmd,"%s%d%s%ld",p0,stopnum,p2,dat); PrintString2(lcd_cmd); UART_Send_END(); } void reconnet_displa(int oknum,long int dat) { sprintf(lcd_cmd,"%s%d%s%ld",p0,oknum,p2,dat); PrintString2(lcd_cmd); UART_Send_END(); } /************断路判断**********************/ void Compare() { /**********************************/ int i; for(i=0;i<24;i++) { if(stopflag[i]<21) { if(Curval[i]==0) { if(timeflag[i]!=count) { timeflag[i]=count; stopflag[i]+=1; } } else { stopflag[i]=0; } } else if(Curval[i]!=0) { stopflag[i]=0; reconnet_displa(i,65535); } else { disconnet_displa(i,63488); } } } /****************************信息接收************************ void message() { char a=1; unsigned int Rcrc=0;//保存接收数据生成CRC校验码 unsigned char RcrcHi=0,RcrcLo=0;; while(a) { for(i=0;i<8;i++) { UART1_TxByte(buff[i]); } uart1_wr=0; delayms(50);//延时让MH912有足够时间做出应答 if(rcv1_okflag==1) //接受54位数据 { rcv1_okflag=0; Rcrc=crc16_table(RX1_Buffer,33); // 应答信息CRC值计算，信息中的校验位不参与计算 RcrcHi=Rcrc%256; RcrcLo=Rcrc/256; UART1_TxByte(0x22); for(i=0;i<35;i++) { UART1_TxByte(RX1_Buffer[i]); } UART1_TxByte(0x33); if( (RcrcLo==RX1_Buffer[33])&&(RcrcHi==RX1_Buffer[34]) ) { a=0; } else { a=1; } } } }*/ /****************************信息接收************************/ void message() { char a=1,b=1; unsigned int Rcrc=0;//保存接收数据生成CRC校验码 unsigned char RcrcHi=0,RcrcLo=0;; while(a) { for(i=0;i<8;i++) { UART1_TxByte(buff[i]); } uart1_wr=0; delayms(50);//延时让MH912有足够时间做出应答 if(rcv1_okflag==1) //接受54位数据 { Rcrc=crc16_table(RX1_Buffer,33); // 应答信息CRC值计算，信息中的校验位不参与计算 RcrcHi=Rcrc%256; RcrcLo=Rcrc/256; for(i=0;i<35;i++) { UART1_TxByte(RX1_Buffer[i]); } if( (RcrcLo==RX1_Buffer[33])&&(RcrcHi==RX1_Buffer[34]) ) { a=0; } else { a=1; } } } delayms(10); while(b) { for(i=0;i<8;i++) { UART1_TxByte(buff1[i]); } uart1_wr=0; delayms(50);//延时让MH912有足够时间做出应答 if(rcv2_okflag==1) //接受54位数据 { rcv1_okflag=0; rcv2_okflag=0; Rcrc=crc16_table(RX11_Buffer,21); // 应答信息CRC值计算，信息中的校验位不参与计算 RcrcHi=Rcrc%256; RcrcLo=Rcrc/256; UART1_TxByte(0x88); for(i=0;i<23;i++) { UART1_TxByte(RX11_Buffer[i]); } UART1_TxByte(0x99); if( (RcrcLo==RX11_Buffer[21])&&(RcrcHi==RX11_Buffer[22]) ) { b=0; } else { b=1; } } } for(i=33;i<52;i++) { RX1_Buffer[i]=RX11_Buffer[i-30]; } } /************主函数**********************/ void main() { int j=0,i=0; unsigned int Tcrc=0;//保存需要发送CRC校验码 unsigned int UART_data; unsigned char temp; uart2_init(); uart1_init(); Time