lesson4.c

运用定时器使和延时函数

#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit wela=P2^6;
sbit dula=P2^7;
void display(uint q,uint b,uint s,uint g);
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
//uchar code tablewe[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
//uchar numdu;
int temp,q,b,s,g;
void delay(uint z)
{
	uint x,y;
	for(x=z;x>0;x--)
		for(y=50;y>0;y--);
}
void main()
{
	temp=1234;
	//numdu=0;
	q=temp/1000;
	b=temp%1000/100;
	s=temp%1000%100/10;
	g=temp%10;
	while(1)	  
	{
	 	display(q,b,s,g);			
	} 
		
	 
}
void display(uint q,uint b,uint s,uint g)
{	  
	      P0=0xff;
		  wela=1;
		  P0=0xfe;
		  wela=0;
		 // delay(10);

		  P0=0xff;
		  dula=1;
		  P0=table[q];
		  dula=0;
		  delay(20);		 
 		
		  P0=0xff;
	      wela=1;
		  P0=0xfd;
		  wela=0;
		  //delay(20);
		 
		  P0=0xff;
		  dula=1;
		  P0=table[b];
		  dula=0;
		  delay(20);


		  P0=0xff;
		  wela=1;
		  P0=0xfb;
		  wela=0;
		  //delay(1);

		  P0=0xff;
		  dula=1;
		  P0=table[s];
		  dula=0;
		  delay(20); 
		  			
		  P0=0xff;
		  wela=1;
		  P0=0xf7;
		  wela=0;
		  //delay(10);

		  P0=0xff;
		  dula=1;
		  P0=table[g];
		  dula=0;
	      delay(20);	
					
}