数码管动态扫描三种完成办法

本程序所用的原理图下载:点这里，单片机芯片运用的stc89c51；找到数码管部分的原理图即可.这是一整个单片机开发板的电路图其他的疏忽.

以下是3个程序的源码：
/**********使用守时器守时50毫秒动态扫描数码管***********/
/**
*功用：守时器T1完成数码管动态扫瞄123456(if)
*作者：徐冉
*日期：2013-06-12-22：10
*补白：不同的办法完成显现设备的动态扫描，节省能耗
**/
/****************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;
}
}
//改写程序
void refrash()
{
static uchar i = 0;
if(0 == i)
{
wela = 1;
P0 = table1[0];
wela = 0;
}
if(1 == i)
{
wela = 1;
P0 = table1[1];
wela = 0;
}
if(2 == i)
{
wela = 1;
P0 = table1[2];
wela = 0;
}
if(3 == i)
{
wela = 1;
P0 = table1[3];
wela = 0;
}
if(4 == i)
{
wela = 1;
P0 = table1[4];
wela = 0;
}
if(5 == i)
{
wela = 1;
P0 = table1[5];
wela = 0;
}
i++;
if(i >= 6)
{
i = 0;
}
}
//守时器T1初始化
void init()
{
P0 = 0x00;//封闭数码管显现
TMOD = 0x11;
TH1 = 0xFC; //T1守时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();//显现
refrash();//改写
}
}
}
//T1中止服务程序
void timer1_int() interrupt 3
{
TH1 = 0xFC;
TL1 = 0x66;
counter++;
}