//这是一个四位数码管动态显示c语言程序，每隔一秒加一，直至加到9999为止//使用时需采用锁存器
#include
#include"stdio.h"
unsigned char code LED[]={0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x90}; unsigned char LEDbuff[]={0xff,0xff,0xff,0xff};
//定义数码管的位选段
sbit SEG_bit_1 = P0^1;
sbit SEG_bit_2 = P0^2;
sbit SEG_bit_3 = P0^3;
sbit SEG_bit_4 = P0^4;
unsigned int cnt=0;
unsigned int sec =0;
unsigned int mini=0;
unsigned int hour=0;
unsigned char i=0;
/*void delay(unsigned int z )
{
unsigned int x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
*/
void interrupttimer0() interrupt 1 /*设置中断函数*/
{
TH0=0xfc;
TL0=0x18;
cnt++;
//P1=0x80;
//delay(1);
switch(i)
{
case 0: SEG_bit_1 = 0;SEG_bit_4 = 1;P1=LEDbuff[0];i++;break;
case 1: SEG_bit_4 = 0;SEG_bit_3 = 1;P1=LEDbuff[1];i++;break;
case 2: SEG_bit_3 = 0;SEG_bit_2 = 1;P1=LEDbuff[2]&;i++;break;
case 3: SEG_bit_2 = 0;SEG_bit_1 = 1;P1=LEDbuff[3];i=0;break;
default:break;
}
}
/************************************************
void serial_init()
{
//TMOD = 0x20; //定时器T/C1工作方式2
SCON = 0x50; //串口工作方式1，允许串口接收（SCON = 0x40 时禁止串口接收）TH1 = 0xF3; //定时器初值高8位设置
TL1 = 0xF3; //定时器初值低8位设置
PCON = 0x80; //波特率倍频（屏蔽本句波特率为2400）
TR1 = 1; //定时器启动
}
**********************************************/
void main()
{
//serial_init(); //串口初始化
//TMOD=0x21; /*设置定时器*/
TMOD=0x01;
TH0=0xfc;
TL0=0x18;
TR0=1;
EA=1; /*设置中断*/
ET0=1;
while(1)
{
if(0==TF0)
{
if(cnt>=1000)
{
cnt=0;
sec++;
if (sec>=60) {
sec=0;mini++;
if (mini>=60) {
mini=0;hour++;
if (hour>=24) hour=0;
}
}
LEDbuff[0]=LED[sec%10]; //*设置数码管显示位*/
LEDbuff[1]=LED[sec/10%10];
LEDbuff[2]=LED[mini%10];
LEDbuff[3]=LED[mini/10%10];
// TI=1; //使用printf函数前须先将发送标志位TI置1
// printf("%4d %x ,%x %x\n ",sec,LEDbuff[0],LEDbuff[1],LEDbuff[2]);
// TI=0;
}
}
}
}
