本程序所用的原理图下载: 点这里 ，单片机芯片使用的stc89c52；找到相应部分即可.这是一整个单片机的电路图其他的忽略.
hex文件及其工程文件下载：http://www.51hei.com/f/pingfc.rar 下面是程序源码：
/*
*功能：使用矩阵按键使得按键按下时上显示各自对应的数字的立方数
* 优化显示，只显示有效位；
* 且使用独立按键实现key1清零，key2加数，key3减数；
*日期：2013-05-07-10:20
*作者：徐冉
*特别说明：本程序代码已经通过调试，仅供学习使用；
*
*/
/***********AT89C52-RC 单片机-51hei实验板***********/
/*****************51hei开发板*********************/
#include
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, //熄灭
0x00 //自定义
};
// uchar key; Error!!! 此时的key值大于258 超出了uchar 故错误！！
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)
{//按键检测
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;
}
//按键释放
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)
{//按键检测
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;
}
//按键释放
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)
{//按键检测
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;
}
//按键释放
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)
{//按键检测
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;
}
//按键释放
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
delay(5);
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
fm = 1;
}
}
}
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