本程序所用的原理图下载: 点这里 ，单片机芯片使用的stc89c52；找到本程序所使用的相应部分即可.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/jzzyou.rar 以下是测试ok的源代码：
/*
*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平方数；
* 且使用定时器0中断使得彩色流水灯先以20毫秒的速度左移流动4秒后，
* 然后使得彩色流水灯以20毫秒的速度右移流动；
*日期：2013-05-02-16:46
*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-5 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 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();//定时器0初始化
while(1)
{
if(counter == 200)//定时器定时左移流动4秒
{
counter = 0;
flag = 1;
TR0 = 0;
TH0 = 0xB8;
TL0 = 0X00;
TR0 = 1;
x = 0;
}
Marix_keyscan();
display(key1);
}
}
//定时器0初始化子程序
void init()
{
TMOD = 0x01;
TH0 = 0xB8;
TL0 = 0X00;
EA = 1;
ET0 = 1;
TR0 = 1;
}
//数码管优化显示子程序
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);
}
}
//延时子程序
void delay(uint xms)
{
uint i, j;
for(i = xms; i > 0; i--)
for(j = 125; j > 0; j--);
}
//矩阵按键检测子程序
void Marix_keyscan()
{
uchar temp; //定义一个变量存放P3口的值
//第一次矩阵按键检测
P3 = 0xfe; //给P3口赋一个值，使得矩阵按键的第一行置为低电平，其余口置为高电平；
temp = P3; //将P3口的值赋给temp
temp &= 0xf0; //通过与0xf0&来检测矩阵按键的各列通过行列检测与检测矩阵按键
if(temp != 0xf0)
{
//检测有矩阵按键按下
delay(5);//消抖
temp = P3;//再次将P3口的值赋给temp,即再次赋初值检测矩阵按键；
temp &= 0xf0; //再次按位与检测矩阵按键行列
if(temp != 0xf0)
{ //确认有键按下
FM = 0;//发声
temp = P3; //将此时的P3口的值赋给temp
switch(temp)
{
case 0xee: key1 = 1 * 1;
break; //检测到key1按下
case 0xde: key1 = 2 * 2;
break; //检测到key2按下
case 0xbe: key1 = 3 * 3;
break; //检测到key3按下
case 0x7e: key1 = 4 * 4;
break; //检测到key4按下
default:
break;
}
//按键释放
while(temp != 0xf0)
{
//重新赋初值检测矩阵按键
temp = P3;
temp &= 0xf0;
}
delay(5);//释放去抖
//按键释放
while(temp != 0xf0)
{
//重新赋初值检测矩阵按键
temp = P3;
temp &= 0xf0;
}
//按键释放关闭蜂鸣器
FM = 1;
}
}
//第二次矩阵按键检测
P3 = 0xfd; //给P3口赋初值，使得矩阵按键的第二行置0，其余行为高电平；
temp = P3;//将用于检测的值赋给变量temp
temp &= 0xf0;
if(temp != 0xf0)
{
delay(5);//消抖
//重新装入待于检测的初值；
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
//确定矩阵按键有键被按下
//将此时的P3口的值赋给temp
FM = 0;
temp = P3;
//开始检测
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;
}
//检测按下释放
while(temp != 0xf0)
{
//重新装入初值
temp = P3;
temp &= 0xf0;
}
delay(5);//释放去抖
while(temp != 0xf0)
{
//重新装入初值
temp = P3;
temp &= 0xf0;
}
//按键释放关闭蜂鸣器
FM = 1;
}
}
//第三次矩阵按键检测
P3 = 0xfb;
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
delay(5);//消抖
//重新装入检测初值
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
//将此时P3口的值赋给temp
temp = P3;
FM = 0;//蜂鸣器发声
//检测按下的是哪一个按键，行列检测
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;
}
//检测按键释放
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
delay(5);
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
//按键释放关闭蜂鸣器
FM = 1;
}
}
//第四次检测矩阵按键
P3 = 0xf7;//第四行为低电平，其余行为高电平；
temp = P3;//将待检测的值赋给temp；
temp &= 0xf0;
if(temp != 0xf0)
{
delay(5); //消抖
//重新装入检测初值
temp = P3;
temp &= 0xf0;
if(temp != 0xf0)
{
//确认有按键按下
//将此时的P3口的实际值赋给temp；
temp = P3;
FM = 0;
//开始检测
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;
}
//检测按键释放
while(temp != 0xf0)
{ //重新装入初值
temp = P3;
temp &= 0xf0;
}
delay(5);
while(temp != 0xf0)
{
temp = P3;
temp &= 0xf0;
}
//关闭蜂鸣器
FM = 1;
}
}
}
//定时器0中断服务子程序
void int_time0() interrupt 1
{
TH0 = 0xB8;
TL0 = 0X00;
counter++;
if(flag == 0)
{ //流水灯左移流动
if(counter % 1 == 0)
{
P1 = ~(1 << x++);
if(x == 8)
{
x = 0;
}
}
}
else
{ //流水灯右移流动
if(counter % 1 == 0)
{
P1 = ~(0x80 >> x++);
if(x == 8)
{
x = 0;
}
}
}
}
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