本程序所用的原理圖下載: 點這里 ，單片機芯片使用的stc89c52；找到相應部分即可.這是一整個單片機開發板的電路圖其他的忽略.以下是通過測試的源代碼：
/*
*功能：用定時器0實現定時200毫秒流水燈,
* 同時用定時器1實現動態顯示654321，
* 且蜂鳴器發聲；
*日期：2014-03-24
*作者：徐冉
*注意事項：若打開兩個定時器時，必須使用兩個定時器，
* 否則兩個定時器都不工作！！！
**/
/**********AT89C52-RC 51hei單片機實驗板**************/
/*************51hei-開發板*********************/
#include <reg52.h>
typedef unsigned int uint;
typedef unsigned char uchar;
sbit wela = P2^7; //數碼管位聲明
sbit dula = P2^6; //數碼管段選聲明
sbit FM = P2^3;//蜂鳴器聲明
uchar counter = 0, counter1 = 0, j = 0, flag = 0, flag1 = 0;
uchar num = 6, num1 = 0;
//數碼管段選編碼
uchar code table_du [] = {
0x3F, //"0"
0x06, //"1"
0x5B, //"2"
0x4F, //"3"
0x66, //"4"
0x6D, //"5"
0x7D, //"6"
0x07, //"7"
0x7F, //"8"
0x6F, //"9"
0x77, //"A"
0x7C, //"B"
0x39, //"C"
0x5E, //"D"
0x79, //"E"
0x71, //"F"
0x76, //"H"
0x38, //"L"
0x37, //"n"
0x3E, //"u"
0x73, //"P"
0x5C, //"o"
0x40, //"-"
0x00, //熄滅
0x00 //自定義
};
//數碼管位選編碼
uchar code table_we[] = {
0xfe,
0xfd,
0xfb,
0xf7,
0xef,
0xdf
};
void init();
void display();
void main()
{
init();
while(1)
{
if(counter1 == 30)
{
counter1 = 0;
display();
num--;
num1++;
if(num == 0)
{
num = 6;
}
if(num1 == 6)
{
num1 = 0;
}
}
if(counter == 200)//定時到4秒后，流水燈向右流動
{
counter = 0;//counter清零，
//關閉定時器0
TR0 = 0;
//ET0 = 0;
flag = 1; //標志變量置1后，定時器重新初始化
TH0 = 0xB8; //定時器0定時20毫秒
TL0 = 0x00;
TR0 = 1; //重新打開定時器0
//ET0 = 1;
j = 0;
}
}
}
//定時器初始化程序
void init()
{
//定時器0和定時器1初始化函數
TMOD = 0x11;//定義定時器1和0在工作方式1下
TH0 = 0xB8; //定時器0定時20毫秒
TL0 = 0x00;
TH1 = 0xFC; //定時器1定時20毫秒
TL1 = 0x67;
TR0 = 1; //打開定時器0
TR1 = 1; //打開定時器1
EA = 1; //打開總中斷
ET0 = 1; //打開定時器0中斷
ET1 = 1; //打開定時器1中斷
}
//數碼管顯示子程序
void display()
{
dula = 1;
P0 = table_du[num];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = table_we[num1];
wela = 0;
dula = 1;
P0 = table_du[num];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = table_we[num1];
wela = 0;
dula = 1;
P0 = table_du[num];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = table_we[num1];
wela = 0;
dula = 1;
P0 = table_du[num];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = table_we[num1];
wela = 0;
dula = 1;
P0 = table_du[num];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = table_we[num1];
wela = 0;
dula = 1;
P0 = table_du[num];
dula = 0;
P0 = 0xff;
wela = 1;
P0 = table_we[num1];
wela = 0;
}
//中斷定時器0
void int_time0() interrupt 1
{
TH0 = 0xB8;
TL0 = 0x00;
counter++;
if(flag == 0)
{
if(counter % 10 == 0)//定時200毫秒
{
P1 = ~(1 << j++);//流水燈左移流動
if(j == 8)
{
j = 0;
}
}
}
else
{
if(counter % 5 == 0)
{
//counter = 0;
//流水燈右移流動
P1 = ~(0x80 >> j++);
FM = ~FM;
if(j == 8)
j = 0;
}
}
}
//中斷定時器1
void int_time1() interrupt 3
{
TH1 = 0xFC;
TL1 = 0x67;
counter1++;
}