51单片机矩阵键盘与左右流水灯控制C程序

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数码管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;//蜂鸣器发声
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;
}
}