led1.c

手把手教你单片机

#include <reg52.h>
typedef  unsigned char   uint8;
typedef  unsigned int    uint16;
uint8 number[] = {0xc0,0xf9,0xa4,0xb0,
				  0x99,0x92,0x82,0xf8,
				  0x80,0x90,0x88,0x83,
				  0xa7,0xa1,0x86,0x8e};

sbit ENLED = P1^4;
sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit  LED  = P0^0;

void refresh();

main()
{
	uint8  i;
	uint16 counter;

	ENLED = 0; ADDR3 = 1;
	TMOD = 0x01;
	TH0 = 0xFC;	 
	TL0 = 0x67;
	TR0 = 1;
	while(1)
	{
		  if(1 == TF0)
		  {
		  		TF0 = 0;
		       	TH0 = 0xFC;
				TL0 = 0x67;
		  		counter++;
				refresh();
	       }
		   if(1000 == counter)
		   {
		   		P0 = number[i++];
				counter = 0;	 
		   }
		   if(i == 16)
		   {
		   		i = 0;
		   }
		   
	}
}
void refresh()
{
	  static uint8 j = 0;
		switch(j)
	   {
	   	case 0: ADDR0 = 0;ADDR1 = 0;ADDR2 = 0;j++;break;
		case 1: ADDR0 = 1;ADDR1 = 0;ADDR2 = 0;j++;break;
		case 2: ADDR0 = 0;ADDR1 = 1;ADDR2 = 0;j++;break;
		case 3: ADDR0 = 1;ADDR1 = 1;ADDR2 = 0;j++;break;
		case 4: ADDR0 = 0;ADDR1 = 0;ADDR2 = 1;j++;break;
		case 5: ADDR0 = 1;ADDR1 = 0;ADDR2 = 1;j = 0;break;
		default: break;
		}
	
}