调用延时子程序.c

LED显示,流水灯,定时器,可用于单片机课程设计

#include <reg51.h>
#define uchar unsigned char
uchar dis[]={0xc0,0xf9,0xa4,0Xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff};
sbit p27=P2^7;
sbit p26=P2^6;
sbit beep=P2^0;
uchar red=0xfc,yellow=0xf3,green=0xcf;
void delay(uchar x)
{ uchar y; while(--x) for(y=0;y<125;y++){;}}
void display(uchar m)
{P0=dis[m/10];
 p27=0; delay(5);p27=1;
 P0=dis[m%10];
 p26=0;delay(5);p26=1;}
void main()
{ uchar i,j; 
while(1)
         { beep=0;delay(500);beep=1;
		 P1=red;for(i=15;i>0;i--){ for(j=0;j<60;j++) 
		                                             {delay(20);display(i);}
													 }
          beep=0;delay(150);beep=1;
          P1=yellow;for(i=3;i>0;i--){ for(j=0;j<60;j++) {delay(20);display(i);}}
          P1=green; beep=0;delay(200);beep=1;delay(200);beep=0;delay(200);beep=1;
          for(i=10;i>0;i--){ for(j=0;j<60;j++) {delay(20);display(i);}}}}