/************************************************
跳线设置:J7拔掉,双排针除PSEN外全部插上
硬件结构框架:
1,八位八段数码管
2,MCU STC89C52
3,4*4距阵键盘
显示效果:
1,按下4*4键盘数码管显示显示0-f的平方
2,带松手检测
相关知识点:
1,键盘的动态扫描
************************************************/
#include"AT89x52.h"
#include"math.h"
#include <intrins.h>
#define uint unsigned int
#define uchar unsigned char
sbit DUAN=P2^6; //74HC573的LE端 U5 LED的段选端
sbit WEI=P2^7; //74HC573的LE端 U4 LED的位选端
uchar smg[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}; //共阴显示字库
//uchar scan_table[]={0xef,0xdf,0xbf,0x7f};
uchar scan_table[]={0x7f,0xbf,0xdf,0xef};//与前面的扫描循序相反,使键盘反转。JUST FOR FUN!!!
uint table[2]={0}; //保存百位、十位、各位
void delay(uint num)
{
uint x,y;
for(x=num;x>0;x--)
for(y=110;y>0;y--);
}
/*void display_smg(uchar number) //显示数字
{
DUAN=1;
P1=smg[number];
DUAN=0;
WEI=1;
P1=0x0;
WEI=0;
}*/
void display (uint number)
{
uint bai,shi,ge,i,temp=0xdf;
/*DUAN=1;
P1=smg[number];
DUAN=0;
WEI=1;
P1=wei;
WEI=0;
delay(1000);*/
number=number*number;
bai=number/100;
//shi=(number-bai*100)/10;
//ge=(number-bai*100-shi*10)/1;
shi=(number%100)/10;
ge=(number%100)%10;
table[0]=bai;
table[1]=shi;
table[2]=ge;
//display_smg(table[1]);
if(bai!=0)
{
DUAN=1;
P1=smg[0];
DUAN=0;
WEI=1;
P1=0x7f;
WEI=0;
WEI=1;
P1=0xff;
WEI=0;
}
DUAN=1;
P1=smg[1];
DUAN=0;
WEI=1;
P1=0xbf;
WEI=0;
WEI=1;
P1=0xff;
WEI=0;
DUAN=1;
P1=smg[2];
DUAN=0;
WEI=1;
P1=0xdf;
WEI=0;
WEI=0;
WEI=1;
P1=0xff;
WEI=0;
/*for(i=0;i<3;i++) //另外一种用循环位移实现方法
{
WEI=1;
P1=temp;
WEI=0;
DUAN=1;
P1=smg[table[2-i]];
DUAN=0;
temp=_crol_(temp,1);
}
*/
}
uchar key_scan()
{
uchar i,j,key_chk;
static uchar num=0;
for(i=0;i<4;i++)
{
P3=scan_table[i];
key_chk=P3;
key_chk=key_chk<<4|0x0f;
for(j=0;j<4;j++)
{
if(key_chk==scan_table[j])
num=i*4+j;
}
while(scan_table[i]!=P3)
P3=scan_table[i];
}
return num;
}
main()
{
//uint i;
while(1)
//display_smg(key_scan());
display(key_scan());
//key_scan();
//display(i);}
}
里面有些调试语句没有删除,烦请各位大虾看看程序错了哪些。多谢!!!
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