pinlvji.rar_频率仿真_频率检测仿真_频率计_频率计 仿真

//频率计 #include<reg51.h> sbit RESET=P1^0; unsigned char code scandisp[]={0x07,0x0b,0x0d,0x0e}; //选择数码管控制口 unsigned char code dispcode[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; unsigned char dispbuf[4]={0,0,0,0}; unsigned int count; unsigned char i,timecount,restar=0; //显示程序 void display() { for(i=0;i<4;i++) { P2=0xff; P0=dispcode[dispbuf[i]]; P2=scandisp[i]; } } //延时程序 void delay(unsigned char us) { while(us--); } //主程序 void main(void) { while(1) { TMOD=0x15; TH0=0; TL0=0; TH1=(65536-50000)/256; TL1=(65536-50000)%256; EA=1; ET1=1; ET0=0; TR1=1; TR0=1; restar=0; while(1) { if(RESET==0)//复位键是否按下？ { delay(100); //防止按键抖动 if(RESET==0) { restar=1; //频率计重启，清零 while(RESET==0) { TR0=0; TR1=0; for(i=0;i<4;i++) dispbuf[i]=0; display(); } } } display(); if(restar==1) break; } } } void t1(void) interrupt 3 using 1 //定时器周期为50ms { TH1=(65536-50000)/256; TL1=(65536-50000)%256; timecount++; if(timecount==20) //1s周期 { TR0=0; TR1=0; count=TH0*256+TL0; //1s计数器所计算的脉冲数 dispbuf[0]=count%10; dispbuf[1]=(count/10)%10; dispbuf[2]=(count/100)%10; dispbuf[3]=(count/1000)%10; TH0=0; TL0=0; timecount=0; TR0=1; TR1=1; } }