51单片机定时器时钟_8位数码管_Proteus仿真代码 -

#include <AT89X52.h> //调用51单片机的头文件
#define uint unsigned int
#define uchar unsigned char
sbit LS164_DATA = P3^0; //74LS164数据线
sbit LS164_CLK = P3^1; //74LS164时钟线
sbit LS164_MR = P3^3; //74LS164使能
sbit HOUR_A = P1^0;
sbit HOUR_S = P1^1;
sbit MINUTE_A = P1^2;
sbit MINUTE_S = P1^3;
sbit SECOND_A = P1^4;
sbit SECOND_S = P1^5;
sbit CLOCK_ON = P1^6;
sbit CLOCK_OFF = P1^7;
//---------------------------------------
//数码管字形表，供显示时查询
unsigned char code LED[11]=
{ //定义表格一定要使用code，这样会做到程序存储区中
0x3F, //"0"的字形表，0B00111111
0x06, //"1"的字形表，0B00000110
0x5B, //"2"的字形表，0B01011011
0x4F, //"3"的字形表，0B01001111
0x66, //"4"的字形表，0B01100110
0x6D, //"5"的字形表，0B01101101
0x7D, //"6"的字形表，0B01111101
0x07, //"7"的字形表，0B00000111
0x7F, //"8"的字形表，0B01111111
0x6F, //"9"的字形表，0B01101111
0x40, //"-", 0B01000000
};
uint miao=0; //秒
uint fen=15; //分
uint shi=12; //时
uint n=0; //计数
uint i=0;
uint state=0;
uint date[6]={0,0,0,0,0,0}; //定义一个有6个地址的数组，分别存时分秒的个位和十位
//---------------------------------------
//8位数码管相关I/O设置
//P2.0-P2.2为3-8译码器U16的3个输入，P2=0x00 0x01 0x02 0x03最大为 0x07
//可以不用定义三个位，直接写P2=0X即可
//---------------------------------------
//x为段选数据，y为位选0x00 0x01 0x02 0x03最大为 0x07
void tube_display(uint x,uint y)
{
P2=y;
// P0=LED[x];
LS164_MR=1;
state=LED[x];
for(i=0;i<8;i++) //循环写8位扩展引脚状态
{
LS164_CLK = 0;
if(state & 0x80)
{
LS164_DATA = 1;
}
else
{
LS164_DATA = 0;
}
LS164_CLK = 1;
state = state<<1;
}
}
//延时函数
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=50;y>0;y--);
}
//定时器初始化
void time_init(void) //定时器初始化函数
{
TMOD=0x02; //选择方式2
TH0=156; //重装初值为156 100us
TL0=156; //运行值为156
EA=1; //开总中断
ET0=1; //开定时器0中断
TR0=1; //开定时器0
}
//外部中断初始化
void INT0_init(void) //定时器初始化函数
{
IT0=1; //INT0负跳变沿触发
EX0=1; //外部中断0使能
EA=1; //总中断使能
}
void display(void)
{
tube_display(10,0x02);
delay(1);
tube_display(10,0x05);
delay(1);
tube_display(date[0],0x07);
delay(1);
tube_display(date[1],0x06);
delay(1);
tube_display(date[2],0x04);
delay(1);
tube_display(date[3],0x03);
delay(1);
tube_display(date[4],0x01);
delay(1);
tube_display(date[5],0x00);
delay(1);
}
/*************************** main code ******************************/
void main(void) //主函数,单片机开机后就是从这个函数开始运行
{
time_init();
INT0_init();
while(1) //死循环,单片机初始化后,将一直运行这个死循环
{
display();
}
}
/********************************************************************/
/*定时器中断*/
void timer() interrupt 1 //定时器0中断
{
n++;
if(n==10000) //当n=10000时，表示1s到了
{
n=0;
miao++;
if(miao==60)
{
miao=0;
fen++;
if(fen==60)
{
fen=0;
shi++;
if(shi==24)
{
shi=0;
}
}
}
date[0]=miao%10;
date[1]=miao/10;
date[2]=fen%10;
date[3]=fen/10;
date[4]=shi%10;
date[5]=shi/10;
}
}
/*按键中断*/
void INT0_ISR(void) interrupt 0
{
EX0=0;
delay(1);
if(HOUR_A==0)
{
shi++;
while(HOUR_A==0);
}
else if(HOUR_S==0)
{
shi--;
while(HOUR_S==0);
}
else if(MINUTE_A==0)
{
fen++;
while(MINUTE_A==0);
}
else if(MINUTE_S==0)
{
fen--;
while(MINUTE_S==0);
}
else if(SECOND_A==0)
{
miao++;
while(SECOND_A==0);
}
else if(SECOND_S==0)
{
miao--;
while(SECOND_S==0);
}
else if(CLOCK_ON==0)
{
TR0=1;
while(CLOCK_ON==0);
}
else if(CLOCK_OFF==0)
{
TR0=0;
while(CLOCK_OFF==0);
}
date[0]=miao%10;
date[1]=miao/10;
date[2]=fen%10;
date[3]=fen/10;
date[4]=shi%10;
date[5]=shi/10;
IE0=0;
EX0=1;
}

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