【51单片机】共阳数码管的动态显示_51单片机共阳极动态数码管

一、设计思路

二、题目

三、编程

#include "reg52.h"
 
unsigned char yu = 12 ;
unsigned char SMG_duanma[18] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,
																0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,
																0xbf,0x7f};   //定义了一个数组，里面有18个元素，对应0~F，最后两个分别是一横和一点。
 
void SelectHC573(unsigned char channel)
{
	switch(channel)
	{
		case 4:
			P2 =( P2 & 0x1f ) | 0x80 ;
		break;
		case 5:
			P2 =( P2 & 0x1f ) | 0xa0 ;
		break;	
		case 6:
			P2 =( P2 & 0x1f ) | 0xc0 ;
		break;
		case 7:
			P2 =( P2 & 0x1f ) | 0xe0 ;
		break;
	}
}
																
void DisplaySMG_Bit(unsigned char value, unsigned char pos)
{
	SelectHC573(6);
	P0 = 0x01 << pos;
	SelectHC573(7);
	P0 = value;
}
 
void DelaySMG(unsigned int t)
{
	while(t--);
}
 
void Display_Dynamic()
{
	DisplaySMG_Bit(SMG_duanma[2],0);
	DelaySMG(500);
	DisplaySMG_Bit(SMG_duanma[0],1);
	DelaySMG(500);
	DisplaySMG_Bit(SMG_duanma[1],2);
	DelaySMG(500);
	DisplaySMG_Bit(SMG_duanma[8],3);
	DelaySMG(500);
	
	DisplaySMG_Bit(SMG_duanma[16],4);
	DelaySMG(500);
	DisplaySMG_Bit(SMG_duanma[16],5);
	DelaySMG(500);	
	
	
	DisplaySMG_Bit(SMG_duanma[yu/10],6);
	DelaySMG(500);
	DisplaySMG_Bit(SMG_duanma[yu%10],7);
	DelaySMG(500);	
}
 
void Delay(unsigned char t)
{
	while(t--)
	{
		Display_Dynamic();
	}
}
 
void main()
{
	while(1) 
	{
		Display_Dynamic();
		yu++;
		if(yu>12) yu=1;
		Delay(100);
	}
}
 

非常简单，唯一的注意事项是动态显示时用到的Delay函数里面要调用Display_Dynamic