数码管动态扫描显示.txt

单片机入门卡发的点行代码

#pragma db code
#include<AT89X52.H>
#define uchar unsigned char
#define uint  unsigned int

sbit LED_0=P1^0;
sbit LED_1=P1^1;
sbit LED_2=P1^2;
sbit LED_3=P1^3;

/*=====0-9=====A-G=====*/
uchar a[16]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,
             0x80,0x90,0x88,0x83,0xc6,0x86,0x8e,0x82};
uchar one=  1;
uchar two=  9;
uchar three=8;
uchar four= 3;

void delay(uint x);
void display(void);

void main()
{
  while(1)
  {
  display();
  }
}

void delay(uint x)
{
  uint i;
  for(i=0;i<x;i++);
}

void display(void)
{
  

  P0=a[one];
  LED_0=0;
  delay(100);
  LED_0=1;

  P0=a[two];
  LED_1=0;
  delay(100);
  LED_1=1;

  P0=a[three];
  LED_2=0;
  delay(100);
  LED_2=1;

  P0=a[four];
  LED_3=0;
  delay(100);
  LED_3=1; 
}