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標題: 單片機秒表（程序） [打印本頁]

作者: 新鄉工程學院 時間: 2021-12-13 23:18
標題: 單片機秒表（程序）
#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
unsigned char table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
sbit ge=P0^0;
sbit shi=P0^1;
sbit key0 = P1^5;
sbit key1 = P1^6;
sbit key2 = P1^7;
uint num = 0;
bit key0_enter=0;
bit key1_enter=0;
bit key2_enter=0;
void init(void)
{
      ge = 0;
      shi = 0;
      EA = 1;
      IT0 = 1;
}
void delay(uchar ms)
{
uchar i ,j;
for (i=0;i<ms;i++)
      for(j=101;j>0;j--);

}

void key_loop()
{
      if ((key0==0)&&(key0_enter==0))
      {
            key0_enter=1;
            EX0=1;

      }
      if(key0==1)
      {
      key0_enter=0;
      }

      if ((key1==0)&&(key1_enter==0))
      {
            key1_enter=1;
            EX0=0;

      }
      if(key1==1)
      {
      key1_enter=0;
      }
      if ((key2==0)&&(key2_enter==0))
      {
            key2_enter=1;
            num = 0;

      }
      if(key2==1)
      {
      key2_enter=0;
      }
}
void display()
{
      static uchar nms=0;
      static bit wei=0;
      uchar ges=0;
      uchar shis=0;
      nms++;
      if(nms>5)
      {
      nms=0;


      if(wei)
      {
         shis=(num/10)%10;
               ge=1;
            shi=1;
            P2=table[shis];
            shi=0;
            wei=0;
      }
      else
      {
               ges=num%10;
            ge=1;
            shi=1;
               P2=table[ges];
            ge=0;
            wei=1;

      }

      }



}
void main()
{
  init();
  for(;;)
  {
      key_loop();
      display();
      delay(1);
  }

}

void waibu() interrupt 0
{
      num++;
}

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