基于51单片机直接驱动数码管定时器显示时钟制作

ID:585817 · 发表于 2022-11-10 02:10

部分程序如下：
#include <reg52.h>
#define uchar unsigned char
//位选口//
sbit P0_0 = P0^0;
sbit P0_1 = P0^1;
sbit P0_2 = P0^2;
sbit P0_3 = P0^3;
sbit P0_4 = P0^4;
sbit P0_5 = P0^5;

//定义按键口//
sbit key_hour=P2^0;//s1
sbit key_min=P2^1;//s2
sbit key_sec=P2^2;//s3
sbit key_rst=P2^3;//s4
//定义字符//
static unsigned char second,minute,hour;
unsigned int tcount;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void delay(uchar i)
{
  uchar j,k;
  for(j=i;j>0;j--)
for(k=125;k>0;k--);
}

void display()
{

P1=table[hour/10];
P0_0 = 0;
delay(5);
P0_0 = 1;

P1=(table[hour%10]|0x80);
P0_1 = 0;
delay(5);
P0_1 = 1;

P1=table[minute/10];
P0_2 = 0;
delay(5);
P0_2 = 1;

P1=(table[minute%10]|0x80);
P0_3 = 0;
delay(5);
P0_3 = 1;

      P1=table[second/10];
P0_4 = 0;
delay(5);
P0_4 = 1;

P1=table[second%10];
P0_5 = 0;
delay(5);
P0_5 = 1;

}

/*演示主程序*/
void main(void)
{

            TMOD=0x02;
TH0=0x06;
TL0=0x06;
TR0=1;
ET0=1;
EA=1;
/*************定义初始值*************/
//hour=16,minute=48,second=0;
while(1)
{
      display();

                                       if(key_hour==0)
            {
                     delay(10);
                     if(key_hour==0)
                     {
                              hour++;
                              if(hour==24)       hour=0;
                     }
                     while(!key_hour);
            }
                              if(key_min==0)
            {
                     delay(10);
                     if(key_min==0)
                     {
                              minute++;
                              if(minute==60)       minute=0;
                     }
                     while(!key_min);
            }
                              if(key_sec==0)
            {
                     delay(10);
                     if(key_sec==0)
                     {
                              second++;
                              if(second==24)       second=0;
                     }
                     while(!key_sec);
            }
                     if(key_rst==0)
            {
                     delay(10);
                     if(key_rst==0)
                     {
                              hour=0;
                              minute=0;
                              second=0;
                     }
                     while(!key_rst);
            }
}
}可以按键调节时间。