一、功能先容
四位共阳数码管点亮，SW1控制C1，SW2控制C4，C2和C3分别体现一条线,当SW1多次按下时，C1从0-9依次循环点亮，C4也从0-9依次循环点亮
二、布局图
三、程序
#include "reg52.h"
sbit C1 = P2^7;
sbit C2 = P2^6;
sbit C3 = P2^5;
sbit C4 = P2^4;
sbit SW1 = P3^4;
sbit SW2 = P3^3;
//¶¨Òå¹²ÑôÊýÂë¹ÜÎÞСÊýµãµÄÊý×Ö¶ÎÂëÖµ
unsigned char SMGNoDot_CA[10] = {0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x90};
unsigned char s1 = 0, s2 = 0;
/*==================ÊýÂë¹Ü¶¯Ì¬ÏÔʾרÓÃÑÓʱº¯Êý==================*/
void DelaySMG(unsigned int t)
{
while(t--);
}
/*=====================µ¥¸öÊýÂë¹ÜÏÔʾº¯Êý=======================*/
void DisPlaySMG_Bit(unsigned char pos, unsigned char dat)
{
P0 = 0xff; //ÏûÒþ
switch(pos) //Ñ¡ÔñÊýÂë¹ÜλÖÃ
{
case 1:
C1 =1; C2 =0; C3 = 0; C4 = 0;
break;
case 2:
C1 = 0; C2 = 1; C3 = 0; C4 = 0;
break;
case 3:
C1 = 0; C2 = 0; C3 = 1; C4 = 0;
break;
case 4:
C1 = 0; C2 = 0; C3 = 0; C4 = 1;
break;
}
P0 = dat; //Êä³öÊýÂë¹ÜÏÔʾµÄÄÚÈÝ
}
/*====================4¸öÊýÂë¹Ü¶¯Ì¬ÏÔʾº¯Êý======================*/
void DisPlaySMG()
{
DisPlaySMG_Bit(1, SMGNoDot_CA[s1]);
DelaySMG(100);
DisPlaySMG_Bit(2, 0xbf);
DelaySMG(100);
DisPlaySMG_Bit(3, 0xbf);
DelaySMG(100);
DisPlaySMG_Bit(4, SMGNoDot_CA[s2]);
DelaySMG(100);
}
/*======================°´¼üɨÃè´¦Àíº¯Êý=======================*/
void Scan_Keys()
{
//SW1°´¼üɨÃè´¦Àí
if(SW1 == 0)
{
DelaySMG(200);
if(SW1 == 0)
{
while(SW1 == 0)
{
DisPlaySMG();
}
s1++;
if(s1 == 10)
{
s1 = 0;
}
}
}
//SW2°´¼üɨÃè´¦Àí
if(SW2 == 0)
{
DelaySMG(200);
if(SW2 == 0)
{
while(SW2 == 0)
{
DisPlaySMG();
}
s2++;
if(s2 == 10)
{
s2 = 0;
}
}
}
}
/*==========================Ö÷º¯Êý============================*/
void main()
{
while(1)
{
DisPlaySMG();
Scan_Keys();
}
}
四、流程图
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