本程序所用的原理圖下載: 點(diǎn)這里 ，單片機(jī)芯片使用的stc89c52；找到本程序所使用的相應(yīng)部分即可.這是一整個(gè)單片機(jī)開(kāi)發(fā)板的電路圖其他的忽略.
hex文件及其工程文件下載：http://www.raoushi.com/f/jzzyou.rar 以下是測(cè)試ok的源代碼：
/*
*功能：使用矩陣按鍵使得按鍵按下時(shí)數(shù)碼管上顯示各自對(duì)應(yīng)的數(shù)字的平方數(shù)；
* 且使用定時(shí)器0中斷使得彩色流水燈先以20毫秒的速度左移流動(dòng)4秒后，
* 然后使得彩色流水燈以20毫秒的速度右移流動(dòng)；
*日期：2013-05-02-16:46
*作者：徐冉
*特別說(shuō)明：本程序代碼已經(jīng)通過(guò)調(diào)試，僅供學(xué)習(xí)使用；
*
*/
/***********AT89C52-RC 單片機(jī)- 51hei-5 實(shí)驗(yàn)板***********/
/*****************51hei開(kāi)發(fā)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(shí)器0初始化
while(1)
{
if(counter == 200)//定時(shí)器定時(shí)左移流動(dòng)4秒
{
counter = 0;
flag = 1;
TR0 = 0;
TH0 = 0xB8;
TL0 = 0X00;
TR0 = 1;
x = 0;
}
Marix_keyscan();
display(key1);
}
}
//定時(shí)器0初始化子程序
void init()
{
TMOD = 0x01;
TH0 = 0xB8;
TL0 = 0X00;
EA = 1;
ET0 = 1;
TR0 = 1;
}
//數(shù)碼管優(yōu)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(shí)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(cè)子程序
void Marix_keyscan()
{
uchar temp; //定義一個(gè)變量存放P3口的值
//第一次矩陣按鍵檢測(cè)
P3 = 0xfe; //給P3口賦一個(gè)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(guò)與0xf0&來(lái)檢測(cè)矩陣按鍵的各列通過(guò)行列檢測(cè)與檢測(cè)矩陣按鍵
if(temp != 0xf0)
{
//檢測(cè)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(cè)矩陣按鍵；
temp &= 0xf0; //再次按位與檢測(cè)矩陣按鍵行列
if(temp != 0xf0)
{ //確認(rèn)有鍵按下
FM = 0;//蜂鳴器發(fā)聲
temp = P3; //將此時(shí)的P3口的值賦給temp
switch(temp)
{
case 0xee: key1 = 1 * 1;
break; //檢測(cè)到key1按下
case 0xde: key1 = 2 * 2;
break; //檢測(cè)到key2按下
case 0xbe: key1 = 3 * 3;
break; //檢測(cè)到key3按下
case 0x7e: key1 = 4 * 4;
break; //檢測(cè)到key4按下
default:
break;
}
//按鍵釋放
while(temp != 0xf0)
{
//重新賦初值檢測(cè)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(cè)矩陣按鍵
temp = P3;
temp &= 0xf0;
}
//按鍵釋放關(guān)閉蜂鳴器
FM = 1;
}
}
//第二次矩陣按鍵檢測(cè)
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(cè)的值賦給變量temp
temp &= 0xf0;
if(temp != 0xf0)
{
delay(5);//消抖
//重新裝入待于檢測(cè)的初值；
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
//確定矩陣按鍵有鍵被按下
//將此時(shí)的P3口的值賦給temp
FM = 0;
temp = P3;
//開(kāi)始檢測(cè)
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(cè)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(guān)閉蜂鳴器
FM = 1;
}
}
//第三次矩陣按鍵檢測(cè)
P3 = 0xfb;
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
delay(5);//消抖
//重新裝入檢測(cè)初值
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
//將此時(shí)P3口的值賦給temp
temp = P3;
FM = 0;//蜂鳴器發(fā)聲
//檢測(cè)按下的是哪一個(gè)按鍵，行列檢測(cè)
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(cè)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(guān)閉蜂鳴器
FM = 1;
}
}
//第四次檢測(cè)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(cè)的值賦給temp；
temp &= 0xf0;
if(temp != 0xf0)
{
delay(5); //消抖
//重新裝入檢測(cè)初值
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
//確認(rèn)有按鍵按下
//將此時(shí)的P3口的實(shí)際值賦給temp；
temp = P3;
FM = 0;
//開(kāi)始檢測(cè)
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(cè)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(guān)閉蜂鳴器
FM = 1;
}
}
}
//定時(shí)器0中斷服務(wù)子程序
void int_time0() interrupt 1
{
TH0 = 0xB8;
TL0 = 0X00;
counter++;
if(flag == 0)
{ //流水燈左移流動(dòng)
if(counter % 1 == 0)
{
P1 = ~(1 << x++);
if(x == 8)
{
x = 0;
}
}
}
else
{ //流水燈右移流動(dòng)
if(counter % 1 == 0)
{
P1 = ~(0x80 >> x++);
if(x == 8)
{
x = 0;
}
}
}
}