单片机学习 1月8日

数码管静态显示

0x3f , 0x06 , 0x5b , 0x4f , 0x66 , 0x6d ,
0 1 2 3 4 5
0x7d , 0x07 , 0x7f , 0x6f , 0x77 , 0x7c ,
6 7 8 9 A B
0x39 , 0x5e , 0x79 , 0x71 , 0x00
C D E F 不显示

位选

sbit weal = P2^7;

低电流通过时工作

段选

sbit dula = P2^6;

共阴极 高电流通过时工作

例程

#include<reg52.h>

sbit dula = P2^6;     //申明U1锁存器锁存端
sbit wela = P2^7;     //申明U2锁存器锁存端      
 
void main()
{
     wela = 1;           //打开锁存器      
	 P0 = 0xfc;          //1111 1100      低电流通过
	 wela = 0;           //关闭锁存器       
	 
	 dula = 1; 
	 P0 = 0x6;           //1100  0000   段选  共阴极    高电流通过
	 dula = 0;
	
	while(1);             //工作停止
	
}
//数码管   第1,2个显示1

#include<reg52.h>

sbit du = P2^6;
sbit we = P2^7;

void main()
{
    we = 1;
	P0 = 0x15;      //0001  0101
	we = 0;
	
	du = 1;
	P0 = 0x7f;      //0011 1111
	du = 0;
	
	while(1);
}
//数码管  1  3  5 位显示8

#include<reg52.h>

sbit du = P2^6;
sbit we = P2^7;

void main()
{
    we = 1;
	P0 = 0xea;      //1110  1010
	we = 0;
	
	du = 1;
	P0 = 0x7f;      //0011 1111
	du = 0;
	
	while(1);
}
//数码管  1  3  5 位显示8

数组实现方式

数组

uchar code table[]={0x3f,0x06,0x5b,
0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,
0x77,0x7c,0x39,0x5e,0x79,0x71};

#include<reg52.h>
#define uchar unsigned char
	
uchar code table[]={0x3f,0x06,0x5b,
0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,
0x77,0x7c,0x39,0x5e,0x79,0x71};

sbit dula = P2^6;
sbit wela = P2^7;

void main()
{
     wela = 1;
	 P0 = 0xfa;                  //  1111 1010
     wela = 0;
	
	 dula = 1;
	 P0 = table[6];
	 dula = 0;
	
	while(1);
}
//数码管 1 3 位实现6

数码管动态显示

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
	
uchar code table[]={0x3f,0x06,0x5b,
0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,
0x77,0x7c,0x39,0x5e,0x79,0x71};

sbit dula = P2^6;
sbit weal = P2^7;


void delay(uint x)
{
	
  uint i,j;
  for(i=x;i>0;i--)
	for(j=110;j>0;j--);
	
}

void main()
{
	 P0 = 0xff;             //1111 1111
   weal = 1;
	 P0 = 0xfe;             //1111 1110
	 weal = 0;
	 dula = 1;
	 P0 = table[0];
	 delay(1);
	
	 P0 = 0xff;             //1111 1111
   weal = 1;
	 P0 = 0xfd;             //1111 1101
	 weal = 0;
	 dula = 1;
	 P0 = table[1];
	 delay(1);
	
 	 P0 = 0xff;             //1111 1111
   weal = 1;
	 P0 = 0xfb;             //1111 1011
	 weal = 0;
	 dula = 1;
	 P0 = table[2];
	 delay(1);
	 
	 P0 = 0xff;             //1111 1111
   weal = 1;
	 P0 = 0xf7;             //1111 0111
	 weal = 0;
	 dula = 1;
	 P0 = table[3];
	 delay(1);
	 
	 P0 = 0xff;             //1111 1111
   weal = 1;
	 P0 = 0xef;             //1110 1111
	 weal = 0;
	 dula = 1;
	 P0 = table[4];
	 delay(1);
	 
	 P0 = 0xff;             //1111 1111
   weal = 1;
	 P0 = 0xdf;             //1101 1111
	 weal = 0;
	 dula = 1;
	 P0 = table[5];
	 delay(1);

}
//数码管同时显示 0 1 2 3 4 5