新手學到51單片機定時器：寫一個定時器1計時1秒，讓P2口燈以不同頻率閃爍

ID:180919 · 發表于 2023-3-25 17:09

新手學到51單片機定時器：寫一個定時器1計時1秒，讓P2口燈以不同頻率閃爍，各位前輩看到多指教下：
#include<reg51.h>
typedef unsigned char u8;
typedef unsigned int  u16;
u8 a,b;
sbit led0 = P2^0;
sbit led1 = P2^1;
sbit led2 = P2^2;
sbit led3 = P2^3;

void time0_init(void)
{
TMOD = 0x01;
TH0  = 0x4b;
TL0  = 0xfc;
TR0  = 1;
}

void time(void)
{
      if(TF0 == 1)
            {
                  TH0  = 0x4b;
                  TL0  = 0xfc;
                  TF0  = 0;
                  a++;
            }

   if(a == 20)
         {
               a = 0;
               b++;
         }
}

void d0(void)
{
      led0 = b % 2;
      led1 = ~led0;
      led3 = b % 4;
   //led3 = b % 60;
}

void main()
{
      time0_init();
      while(1)
      {
               time();
            d0();
      }
}