zhankongbi.rar_51 占空比_测量占空比

#include<stdio.h> #include<reg51.h> #include<string.h> #define uint unsigned int #define uchar unsigned char uint a = 0; uint b = 0; uint c = 0; uint d = 0; long t1 = 0; long t2 = 0; float t = 0; sbit RS=P2^0; sbit RW=P2^1; sbit E =P2^2; //***************************延时子程序*************************** void delay(uint i) { uint j; for(;i>0;i--) for(j=0;j<125;j++); } //***************************写指令子程序************************* void write_com(uchar com) { RS=0; RW=0; P1=com; E=1; delay(1); E=0; } //***************************写数据子程序************************* void write_dat(uchar dat) { RS=1; RW=0; P1=dat; E=1; delay(1); E=0; } //**********************光标定位函数****************************** void LcdPos (uchar Xpos,uchar Ypos) { uchar tmp; Xpos&=0x0f; Ypos&=0x01; tmp=Xpos; if(Ypos==1) tmp|=0xc0; tmp|=0x80; write_com(tmp); } //***********************LCD初始化子程序************************** LCDRset(void) { E=0;//**************使能端禁止 write_com(0X38); delay(1); write_com(0X01);//**清屏 delay(1); write_com(0X0C);//**开显示光标不显示 delay(1); write_com(0x06);//**光标加一 delay(1); } //*******************在指定行列显示字符子程序********************** void writeChar(uchar Xpos,uchar Ypos,char c) { LcdPos(Xpos,Ypos); write_dat(c); } //********************在指定行列写入指定字符串********************* void writeString(uchar Xpos,uchar Ypos,char s[]) { uchar p=0; while(1) { writeChar(Xpos,Ypos,s[p]); p++; if(s[p]==0) break; if(++Xpos>15) { Xpos=0; Ypos^=1;//异或运算 } } } //***************************显示子程序**************************** void Display(void) { uchar c[16],d[16],e[16]; memset(c,0,sizeof(c)); memset(d,0,sizeof(c)); memset(e,0,sizeof(c)); t=((float)t1)/(t1+t2)*360; sprintf(c,"%ld",t1); writeString(0,0,c); sprintf(d,"%ld",t2); writeString(0,1,d); sprintf(e,"%5.2f",t); writeString(9,0,e); } void main(void) { IE = 0X0f; TMOD = 0X99; IT0 = 1; IT1 = 1; TR0 = 0; TR1 = 0; EA = 1; LCDRset(); while(1) { if(t1!=0 && t2!=0) { Display(); delay(255); } else { writeString(0,0,"."); delay(255); writeString(0,0,".."); delay(255); writeString(0,0,"..."); delay(255); } } } int1() interrupt 2 { if(a == 0) { TR0 = 1; TH0 = 0; TL0 = 0; b = 0; } a++; if(a == 10) { TR0 = 0; a = 0; t1 = b*65536+TH0*256+TL0; } } int_t0() interrupt 1 { b++; } int0() interrupt 0 { if(c == 0) { TR1 = 1; TH1 = 0; TL1 = 0; d = 0; } c++; if(c == 10) { TR1 = 0; c = 0; t2 = d*65536+TH1*256+TL1; } } int_t1() interrupt 3 { d++; }