本程序所用的原理圖下載: 點這里 ，單片機芯片使用的stc89c52；找到相應部分即可.這是一整個單片機開發板的電路圖其他的忽略.
hex文件及其工程文件下載：http://m.zg4o1577.cn/f/pingfc.rar 下面是程序源碼：
/*
*功能：使用矩陣按鍵使得按鍵按下時數碼管上顯示各自對應的數字的立方數
* 優化顯示，只顯示有效位；
* 且使用獨立按鍵實現key1清零，key2加數，key3減數；
*日期：2013-05-07-10:20
*作者：徐冉
*特別說明：本程序代碼已經通過調試，僅供學習使用；
*
*/
/***********AT89C52-RC 單片機-51hei實驗板***********/
/*****************51hei開發板*********************/
#include <reg52.h>
typedef unsigned int uint;
typedef unsigned char uchar;
sbit wela = P2^7;
sbit dula = P2^6;
sbit key1 = P3^4;
sbit key2 = P3^5;
sbit key3 = P3^6;
sbit fm = P2^3;
uint temp;
uchar code table[] = {
0x3F, //"0"
0x06, //"1"
0x5B, //"2"
0x4F, //"3"
0x66, //"4"
0x6D, //"5"
0x7D, //"6"
0x07, //"7"
0x7F, //"8"
0x6F, //"9"
0x77, //"A"
0x7C, //"B"
0x39, //"C"
0x5E, //"D"
0x79, //"E"
0x71, //"F"
0x76, //"H"
0x38, //"L"
0x37, //"n"
0x3E, //"u"
0x73, //"P"
0x5C, //"o"
0x40, //"-"
0x00, //熄滅
0x00 //自定義
};
// uchar key; Error!!! 此時的key值大于258 超出了uchar 故錯誤！！
uint key;
void display(num);
void delay(uint xms);
void max_kanscan();
void keyscan();
void main(void)
{
while(1)
{
keyscan();
max_kanscan();
display(key);
}
}
void display(num)
{
uchar qian, bai, shi, ge;
qian = num / 1000 % 10;
bai = num / 100 % 10;
shi = num / 10 % 10;
ge = num % 10;
if(num < 10)
{
dula = 1;
P0 =table[ge];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfe;
wela = 0;
}
else if(num < 100)
{
dula = 1;
P0 =table[shi];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfe;
wela = 0;
P0 = 0x00;
delay(1);
dula = 1;
P0 =table[ge];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfd;
wela = 0;
P0 = 0x00;
delay(1);
}
else if(num < 1000)
{
dula = 1;
P0 =table[bai];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfe;
wela = 0;
P0 = 0x00;
delay(1);
dula = 1;
P0 =table[shi];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfd;
wela = 0;
P0 = 0x00;
delay(1);
dula = 1;
P0 =table[ge];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfb;
wela = 0;
P0 = 0x00;
delay(1);
}
else if(num < 10000)
{
dula = 1;
P0 =table[qian];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfe;
wela = 0;
P0 = 0x00;
delay(1);
dula = 1;
P0 =table[bai];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfd;
wela = 0;
P0 = 0x00;
delay(1);
dula = 1;
P0 =table[shi];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xfb;
wela = 0;
P0 = 0x00;
delay(1);
dula = 1;
P0 =table[ge];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = 0xf7;
wela = 0;
P0 = 0x00;
delay(1);
}
}
void delay(uint xms)
{
uint i, j;
for(i = xms; i > 0; i--)
for(j = 125; j > 0; j--);
}
void keyscan()
{
if(key1 == 0)
{
delay(5);
if(key1 == 0)
{
fm = 0;
key = 0;
while(!key1);
delay(5);
while(!key1);
fm = 1;
}
}
if(key2 == 0)
{
delay(5);
if(key2 == 0)
{
fm = 0;
key++;
while(!key2);
delay(5);
while(!key2);
fm = 1;
}
}
if(key3 == 0)
{
delay(5);
if(key3 == 0)
{
fm = 0;
key--;
while(!key3);
delay(5);
while(!key3);
fm = 1;
}
}
}
void max_kanscan()
{
P3 = 0xfe;
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
delay(5);
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{ //按鍵檢測
temp = P3;
fm = 0;
switch(temp)
{
case 0xee: key = 1 * 1 *1;
break;
case 0xde: key = 2 * 2 *2;
break;
case 0xbe: key = 3 * 3 *3;
break;
case 0x7e: key = 4 * 4 *4;
break;
default:
break;
}
//按鍵釋放
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
delay(5);
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
fm = 1;
}
}
P3 = 0xfd;
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
delay(5);
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{ //按鍵檢測
temp = P3;
fm = 0;
switch(temp)
{
case 0xed: key = 5 * 5 *5;
break;
case 0xdd: key = 6 * 6 *6;
break;
case 0xbd: key = 7 * 7 *7;
break;
case 0x7d: key = 8 * 8 *8;
break;
default:
break;
}
//按鍵釋放
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
delay(5);
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
fm = 1;
}
}
P3 = 0xfb;
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
delay(5);
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{ //按鍵檢測
temp = P3;
fm = 0;
switch(temp)
{
case 0xeb: key = 9 * 9 *9;
break;
case 0xdb: key = 10 * 10 *10;
break;
case 0xbb: key = 11 * 11 *11;
break;
case 0x7b: key = 12 * 12 *12;
break;
default:
break;
}
//按鍵釋放
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
delay(5);
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
fm = 1;
}
}
P3 = 0xf7;
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
delay(5);
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{ //按鍵檢測
temp = P3;
fm = 0;
switch(temp)
{
case 0xe7: key = 13 * 13 *13;
break;
case 0xd7: key = 14 * 14 *14;
break;
case 0xb7: key = 15 * 15 *15;
break;
case 0x77: key = 16 * 16 *16;
break;
default:
break;
}
//按鍵釋放
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
delay(5);
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
fm = 1;
}
}
}