一、功能介绍
在单片机上面按键控制数码管显示按键次数
二、程序代码
/******************СÃÛ·äÀÏʦµÄ51µ¥Æ¬»ú¿ª·¢ÏîÄ¿°¸Àý********************
ÔÚµ¥Æ¬»úÊýÂë¹ÜÉÏÏÔʾ0ÖÁ9£¬×ó±ßÊýÂë¹ÜÓÉSw1¿ØÖÆ£¬ÓÒ±ßÊýÂë¹ÜÓÉSw2¿ØÖÆ£¬Ã¿°´Ò»´Î´Ó0ÖÁ9ÒÀ´ÎÔö¼Ó
**********************************************************************/
#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();
}
}
三、流程图、结构图
四、总结
本节课是我们的期末考试,在本学期里面我学会了很多。在后面的课上我会更加认真学习。