按下第三个按钮后，AVR代码停止工作

Question

我希望我的代码在系统开机时第一次闪烁，然后当按下D3引脚上的按钮B1时，在按下按钮时冻结LED状态。然后在B1再次按下，继续闪烁等等......

我的代码工作，直到我第二次按B1。 AVR冻结了状态，但是当我第三次按下B1时，什么也没有发生。我的范围有问题吗？

#include <avr/io.h> 
#include <avr/interrupt.h> 

#define LED1 PIND1 
#define B2 PIND2 
#define B1 PIND3 
#define LED2 PIND4 

    void turn_on(); 
    void turnoff(); 
    void toggle_led1(); 
    void toggle_led2(); 
    void blink(); 
    void led1_on_led2_off(); 

    int counter = 0; 

    int main(void) 
    { 
     // Set variables 
     DDRD |= 1 << LED1; //Set Direction for Output on PINB0 (Led 1) 
     DDRD |= 1 << LED2; //Set Direction for Output on PINB0 (Led 2) 
     DDRD &= ~(1 << B1); //Data Direction Register input PINB3 (Button B1) 
     PORTD |= 1 << B1; //Set PINB3 to a high reading 
     DDRD &= ~(1 << B2); //Data Direction Register input PINB4 (Button B2) 
     PORTD |= 1 << B2; //Set PINB4 to a high reading 



     int Pressed = 0; 
     int Pressed_Confidence_Level = 0; 
     int Released_Confidence_Level = 0; 

     GICR |=(1<<INT0);//Enables int0 as an external interrupt 
     MCUCR |= (1<<ISC01 | 1<<ISC00); // Generate interrupt on rising edge 

     sei(); // Enable the global interrupts 
     TCCR1B |= 1<<CS10 | 1<<CS11; // start the timer at F_CPU/pre-scaler 
     OCR1A = 7812; // = 0.5 second 


     turnoff(); 

     while(1) 
     { 
      if (bit_is_clear(PIND, 3)) 
      { 
       Pressed_Confidence_Level ++; //Increase Pressed Confidence 
       Released_Confidence_Level = 0; //Reset released button confidence since there is a button press 
       if (Pressed_Confidence_Level >500) //Indicator of good button press 
       { 
        if (Pressed == 0) 
        { 
         Pressed = 1; 
              counter++; 
        } 
        //Zero it so a new pressed condition can be evaluated 
        Pressed_Confidence_Level = 0; 
       } 
      } 
      else 
      { 
       Released_Confidence_Level ++; //This works just like the pressed 
       Released_Confidence_Level = 0; //Reset pressed button confidence since the button is released 
       if (Released_Confidence_Level >500) 
       { 
        Pressed = 0; 
        Released_Confidence_Level = 0; 
       } 
      } 

      if(counter%2==0) 
      { 
       blink(); 
      }    

     }   


     return 0;  
    }   



    /* 
    TCCR0 is a control register used in pre-scaling. 
    */ 

    void turn_on() 
    { 
     PORTD |= 1 << LED1;// Turns on LED1 on port d 
     PORTD |= 1 << LED2;// Turns on LED2 on port d 
    } 
    void turnoff() 
    { 
     PORTD &= ~(1 << LED1); 
     PORTD &= ~(1 << LED2); 
    } 

    void toggle_led1() 
    { 
     PORTD ^= (1 << LED1); 
    } 
    void toggle_led2() 
    { 
     PORTD ^= (1 << LED2); 
    } 
    void blink() 
    { 
     if(TCNT1>7812) 
     { 
      toggle_led1(); 
      toggle_led2(); 

      TCNT1 = 0; 
     } 
    } 
    void led1_on_led2_off() 
    { 
     PORTD |= 1 << LED1; 
     PORTD &= ~(1 << LED2); 
    }  

Answer 1

您总是在else分支中增加后重置Released_Confidence_Level。