/*

*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;

}

}[page]

//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;

}

}

}

}