本程序所用的原理圖下載: 點這里 ，單片機芯片使用的stc89c52；找到本程序所使用的相應部分即可.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://www.zg4o1577.cn/f/jzzyou.rar 以下是測試ok的源代碼：
/*
*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平方數；
* 且使用定時器0中斷使得彩色流水燈先以20毫秒的速度左移流動4秒后，
* 然后使得彩色流水燈以20毫秒的速度右移流動；
*日期：2013-05-02-16:46
*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-5 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 FM = P2^3;
uchar code table[] = {
0x3F, //"0"
0x06, //"1"
0x5B, //"2"
0x4F, //"3"
0x66, //"4"
0x6D, //"5"
0x7D, //"6"
0x07, //"7"
0x7F, //"8"
0x6F //"9"
};
uint key1 = 0;
uchar counter = 0, x = 0, flag = 0;
void display(uint num);
void delay(uint xms);
void Marix_keyscan();
void init();
//主程序
void main()
{
init();//定時器0初始化
while(1)
{
if(counter == 200)//定時器定時左移流動4秒
{
counter = 0;
flag = 1;
TR0 = 0;
TH0 = 0xB8;
TL0 = 0X00;
TR0 = 1;
x = 0;
}
Marix_keyscan();
display(key1);
}
}
//定時器0初始化子程序
void init()
{
TMOD = 0x01;
TH0 = 0xB8;
TL0 = 0X00;
EA = 1;
ET0 = 1;
TR0 = 1;
}
//數碼管優化顯示子程序
void display(uint num)
{
uchar bai, shi, ge;
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;
P0 = 0x00;
delay(1);
}
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
{
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);
}
}
//延時子程序
void delay(uint xms)
{
uint i, j;
for(i = xms; i > 0; i--)
for(j = 125; j > 0; j--);
}
//矩陣按鍵檢測子程序
void Marix_keyscan()
{
uchar temp; //定義一個變量存放P3口的值
//第一次矩陣按鍵檢測
P3 = 0xfe; //給P3口賦一個值，使得矩陣按鍵的第一行置為低電平，其余口置為高電平；
temp = P3; //將P3口的值賦給temp
temp &= 0xf0; //通過與0xf0&來檢測矩陣按鍵的各列通過行列檢測與檢測矩陣按鍵
if(temp != 0xf0)
{
//檢測有矩陣按鍵按下
delay(5);//消抖
temp = P3;//再次將P3口的值賦給temp,即再次賦初值檢測矩陣按鍵；
temp &= 0xf0; //再次按位與檢測矩陣按鍵行列
if(temp != 0xf0)
{ //確認有鍵按下
FM = 0;//蜂鳴器發聲
temp = P3; //將此時的P3口的值賦給temp
switch(temp)
{
case 0xee: key1 = 1 * 1;
break; //檢測到key1按下
case 0xde: key1 = 2 * 2;
break; //檢測到key2按下
case 0xbe: key1 = 3 * 3;
break; //檢測到key3按下
case 0x7e: key1 = 4 * 4;
break; //檢測到key4按下
default:
break;
}
//按鍵釋放
while(temp != 0xf0)
{
//重新賦初值檢測矩陣按鍵
temp = P3;
temp &= 0xf0;
}
delay(5);//釋放去抖
//按鍵釋放
while(temp != 0xf0)
{
//重新賦初值檢測矩陣按鍵
temp = P3;
temp &= 0xf0;
}
//按鍵釋放關閉蜂鳴器
FM = 1;
}
}
//第二次矩陣按鍵檢測
P3 = 0xfd; //給P3口賦初值，使得矩陣按鍵的第二行置0，其余行為高電平；
temp = P3;//將用于檢測的值賦給變量temp
temp &= 0xf0;
if(temp != 0xf0)
{
delay(5);//消抖
//重新裝入待于檢測的初值；
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
//確定矩陣按鍵有鍵被按下
//將此時的P3口的值賦給temp
FM = 0;
temp = P3;
//開始檢測
switch(temp)
{
case 0xed: key1 = 5 * 5;
break;
case 0xdd: key1 = 6 * 6;
break;
case 0xbd: key1 = 7 * 7;
break;
case 0x7d: key1 = 8 * 8;
break;
default:
break;
}
//檢測按下釋放
while(temp != 0xf0)
{
//重新裝入初值
temp = P3;
temp &= 0xf0;
}
delay(5);//釋放去抖
while(temp != 0xf0)
{
//重新裝入初值
temp = P3;
temp &= 0xf0;
}
//按鍵釋放關閉蜂鳴器
FM = 1;
}
}
//第三次矩陣按鍵檢測
P3 = 0xfb;
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
delay(5);//消抖
//重新裝入檢測初值
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
//將此時P3口的值賦給temp
temp = P3;
FM = 0;//蜂鳴器發聲
//檢測按下的是哪一個按鍵，行列檢測
switch(temp)
{
case 0xeb: key1 = 9 * 9;
break;
case 0xdb: key1 = 10 * 10;
break;
case 0xbb: key1 = 11 * 11;
break;
case 0x7b: key1 = 12 * 12;
break;
default:
break;
}
//檢測按鍵釋放
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
delay(5);
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
//按鍵釋放關閉蜂鳴器
FM = 1;
}
}
//第四次檢測矩陣按鍵
P3 = 0xf7;//第四行為低電平，其余行為高電平；
temp = P3;//將待檢測的值賦給temp；
temp &= 0xf0;
if(temp != 0xf0)
{
delay(5); //消抖
//重新裝入檢測初值
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
//確認有按鍵按下
//將此時的P3口的實際值賦給temp；
temp = P3;
FM = 0;
//開始檢測
switch(temp)
{
case 0xe7: key1 = 13 * 13;
break;
case 0xd7: key1 = 14 * 14;
break;
case 0xb7: key1 = 15 * 15;
break;
case 0x77: key1 = 16 * 16;
break;
default:
break;
}
//檢測按鍵釋放
while(temp != 0xf0)
{ //重新裝入初值
temp = P3;
temp &= 0xf0;
}
delay(5);
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
//關閉蜂鳴器
FM = 1;
}
}
}
//定時器0中斷服務子程序
void int_time0() interrupt 1
{
TH0 = 0xB8;
TL0 = 0X00;
counter++;
if(flag == 0)
{ //流水燈左移流動
if(counter % 1 == 0)
{
P1 = ~(1 << x++);
if(x == 8)
{
x = 0;
}
}
}
else
{ //流水燈右移流動
if(counter % 1 == 0)
{
P1 = ~(0x80 >> x++);
if(x == 8)
{
x = 0;
}
}
}
}