linux 动态扫描 数码管,数码管动态扫描三种实现方法

数码管,数码管动态扫描三种实现方法"/>

linux 动态扫描 数码管,数码管动态扫描三种实现方法

/**********利用定时器定时50毫秒动态扫描数码管***********/

/**

*功能：定时器T1实现数码管动态扫瞄123456(switchcase)

*作者：徐冉

*日期：2013-06-12-21：50

*备注：不同的方法实现显示设备的动态扫描，节约能耗

**/

/****************AT89C52-RC MCU*************/

/****************51hei开发板*************/

#include typedef unsigned int uint;

typedef unsigned char uchar;

sbit wela = P2^7;

sbit dula = P2^6;

//段选数据编码表

uchar code table[] = {

0x3F, //"0"

0x06, //"1"

0x5B, //"2"

0x4F, //"3"

0x66, //"4"

0x6D, //"5"

0x7D, //"6"

0x07, //"7"

0x7F, //"8"

0x6F //"9"

};

//位选数据编码表

uchar code table1[] = {

0xfe,

0xfd,

0xfb,

0xf7,

0xef,

0xdf

};

uchar j = 1, counter = 0;

//延时程序

void display()

{

dula = 1;

P0 = table[j++];

dula = 0;

if(j >= 7)

{

j = 1;

}

}

//刷新程序

void refrash()

{

static uchar i = 0;

switch(i)

{

case 0: wela = 1; P0 = table1[i]; wela = 0; i++;

break;

case 1: wela = 1; P0 = table1[i]; wela = 0; i++;

break;

case 2: wela = 1; P0 = table1[i]; wela = 0; i++;

break;

case 3: wela = 1; P0 = table1[i]; wela = 0; i++;

break;

case 4: wela = 1; P0 = table1[i]; wela = 0; i++;

break;

case 5: wela = 1; P0 = table1[i]; wela = 0; i++;

break;

default: break;

}

if(i >= 6)

{

i = 0;

}

}

//定时器T1初始化

void init()

{

P0 = 0x00;//关闭数码管显示

TMOD = 0x11;

TH1 = 0xFC; //T1定时1毫秒

TL1 = 0x66;

TR1 = 1;

EA = 1;

ET1 = 1;

}

//主程序

void main(void)

{

init();

while(1)

{

if(counter == 50)

{

counter = 0;

display();//显示

refrash();//刷新

}

}

}

//T1中断服务程序

void timer1_int() interrupt 3

{

TH1 = 0xFC;

TL1 = 0x66;

counter++;

}

/**********利用延时函数定时50毫秒动态扫描数码管***********/

/**

*功能：延时函数实现数码管动态扫瞄123456

*作者：徐冉

*日期：2013-06-12-20：50

*备注：不同的方法实现显示设备的动态扫描，节约能耗

**/

/****************AT89C52-RC MCU*************/

/****************51hei开发板*************/

#include typedef unsigned int uint;

typedef unsigned char uchar;

sbit wela = P2^7;

sbit dula = P2^6;

//段选编码表

uchar code table[] = {

0x3F, //"0"

0x06, //"1"

0x5B, //"2"

0x4F, //"3"

0x66, //"4"

0x6D, //"5"

0x7D, //"6"

0x07, //"7"

0x7F, //"8"

0x6F //"9"

};

//位选编码表

uchar code table1[] = {

0xfe,

0xfd,

0xfb,

0xf7,

0xef,

0xdf

};

//毫秒延时程序

void delay(uint xms)

{

uint x, y;

for(x = 0; x < xms; x++)

for(y = 0; y < 110; y++);

}

//动态扫描程序

void display()

{

static uchar i = 0;//静态变量i

dula = 1;

P0 = table[i+1];//段选数据

dula = 0;

P0 = 0xff;//消影

wela = 1;

P0 = table1[i]; //位选数据

wela = 0;

delay(50);//延时50毫秒

i++;

if(i >= 6)

{

i = 0;

}

}

//主程序

void main(void)

{

P0 = 0x00;//开始时关闭所有数码管显示

while(1)

{

display();

}

}