PIC12F675单片机奇怪问题

ID:206067 · 发表于 2019-1-13 02:05

程序目的是实现上电灯就亮”输出1“ 定时后”输出0“

#include<pic.h>

#include <xc.h>
#pragma config FOSC = INTRCIO // Oscillator Selection bits (INTOSC oscillator: I/O function on GP4/OSC2/CLKOUT pin, I/O function on GP5/OSC1/CLKIN)
#pragma config WDTE = OFF    // Watchdog Timer Enable bit (WDT disabled)
#pragma config PWRTE = OFF    // Power-Up Timer Enable bit (PWRT disabled)
#pragma config MCLRE = OFF    // GP3/MCLR pin function select (GP3/MCLR pin function is digital I/O, MCLR internally tied to VDD)
#pragma config BOREN = OFF    // Brown-out Detect Enable bit (BOD disabled)
#pragma config CP = OFF       // Code Protection bit (Program Memory code protection is disabled)
#pragma config CPD = OFF       // Data Code Protection bit (Data memory code protection is disabled)

#define KEY GP3

unsigned char count=0;
unsigned char miao=0;
unsigned char fen=0;

void main()
{
OSCCAL=0b00000100;//intside RC
TRISIO=0b00001000;//IO方向设置
OPTION_REG=0b00000111;//分频比1：256
TMR0=0;
GP0=1;
  //  GP1=GP2=GP4=GP5=0;  写进这行灯就一直不亮，不写就是正常的
while(1)
      {
         if(TMR0==180)//50ms
         {
            TMR0=0;
            count++;
            if(count==20)//1秒定时
            {
                  miao++;
                  count=0;
                  if(miao==5)
                  {
                     miao=0;
                     GP0=0;
                  }
            }

         }
   }
}

ID:206067 · 发表于 2019-1-21 11:35

有人知道吗

ID:138119 · 发表于 2019-1-27 11:16

印象中我也遇到过类似问题，很久了，记得可能是编译器优化级别的问题。

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