单片机编程1.2

单片机经典类型编程

实验五 定时/计数器

1———————————————————————————————————————#include <reg51.h> #include <intrins.h> unsigned char flag=0; void delay_ms(unsigned int x) { unsigned int i; unsigned char j; for(i=x;i>0;i--) for(j=110;j>0;j--); } void Time0()interrupt 1 { unsigned char count; TH0=0xff; TL0=0xff; delay_ms(20); if(T0==0) { delay_ms(20); if(T0==0) { count++; if(count==3) { flag=!flag; } if(count==6) { count=0; flag=!flag; } }

} } void main () { TMOD=0x05; TH0=0xff; TL0=0xff; EA=1;

ET0=1; TR0=1; P3=0xfe;

P1=0xfe; delay_ms(10000); while(1) { if(!flag) { P1=_crol_(P1,1);

delay_ms(10000); } if(flag) { P1=_cror_(P1,1);

delay_ms(10000); } } } 1

单片机经典类型编程

实验五 定时/计数器

二

#include <reg51.h> #include <intrins.h> unsigned char flag=0; void delay_ms(unsigned int x) { unsigned int i; unsigned char j; for(i=x;i>0;i--) for(j=110;j>0;j--); }

void Time0()interrupt 1 { unsigned char count; TH0=0xff; TL0=0xff; delay_ms(20);

if(T0==0) { delay_ms(20); if(T0==0) { count++; if(count==3)

{ flag=!flag; } if(count==6) { count=0;

flag=!flag; } } } }

void Time1()interrupt 3 { unsigned char count1; TH1=0xff; TL1=0xff; delay_ms(20); if(T1==0) { delay_ms(20); if(T1==0) { count1++; if(count1==4) { flag=!flag; } if(count1==8) { count1=0; flag=!flag; } } } }

void main () { TMOD=0x55; TH0=0xff; TL0=0xff; TH1=0xff; TL1=0xff; EA=1; ET0=1; ET1=1;

2

单片机经典类型编程

实验五 定时/计数器

}

TR0=1; TR1=1; P3=0xfe;

P1=0xfe;

delay_ms(10000); while(1) { if(!flag) { P1=_crol_(P1,1); delay_ms(10000); } if(flag) { P1=_cror_(P1,1); delay_ms(10000); } }

三

#include <reg51.h>

#define uchar unsigned char #define uint unsigned int sbit P34=P3^4; uchar count; uchar i=0; uchar

led[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};

3

void time0()interrupt 1 { TH0=(65535-50000)/256; TL0=(65535-50000)%256; P34=~P34; }

void time1()interrupt 3 { TH1=0xff; TL1=0xff; count++; if(count==10) { count=0; P1=led[i]; i++; if(i==8) i=0; } }

void main () { TMOD=0X51; TH1=0xff; TL1=0xff; TH0=(65535-50000)/256; TL0=(65535-50000)%256; EA=1; ET0=1; TR0=1; ET1=1;

单片机经典类型编程

实验五 定时/计数器

}

TR1=1; count=0; P1=0xff;

while(1);

}

}

disp[0]=1; disp[1]=2; disp[2]=3; disp[3]=4;

四

#include<reg51.h> #include<stdlib.h>

#define uint unsigned int #define uchar unsigned char uchar i; uchar code dtab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};

uchar code selec[4]={0xef,0xdf,0xbf,0x7f}; uchar disp[4];

void Time0(void)interrupt 1 { TH0=(65536-4000)/256; TL0=(65535-4000)%256; P2=0xff; P0=dtab[disp[i]]; P2=selec[i]; if(++i>3) i=0; }

void main() { TMOD=0x01; EA=1; ET0=1; TH0=(65536-4000)/256; TL0=(65535-4000)%256; TR0=1; while(1) {

4