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Код: Выделить всё

#define  F_CPU 8000000UL


#include <avr/io.h>
#include <util/delay.h>
int NewState,OldState,Vol,upState,downState;

#include <avr/interrupt.h>

ISR(TIMER1_COMPA_vect)
{
    NewState=PIND & 0b0000011;
    if(NewState!=OldState)
    {
        switch(OldState)
        {
            case 2:
            {
                if(NewState == 3) upState++;
                if(NewState == 0) downState++;
                break;
            }
            
            case 0:
            {
                if(NewState == 2) upState++;
                if(NewState == 1) downState++;
                break;
            }
            case 1:
            {
                if(NewState == 0) upState++;
                if(NewState == 3) downState++;
                break;
            }
            case 3:
            {
                if(NewState == 1) upState++;
                if(NewState == 2) downState++;
                break;
            }
        }
        OldState=NewState;
    }
    TCNT1H=0x00;
    TCNT1L=0x00;
}

int main(void)
{
    
    
    PORTD=0x03;
    DDRD=0x00;
    DDRB=0x01;
    PORTB=0x00;
    
    TCCR1A=0x00;
    TCCR1B=0x0A;
    
    OCR1AH=0x03;
    OCR1AL=0xE8;
    
    
    // Timer(s)/Counter(s) Interrupt(s) initialization
    
    asm("sei");
    // Global enable interrupts
    
    
    while (1)
    {
        if (upState >= 4)
        {
           PORTB|=0x01;
        }
        if (downState >= 4)
        {
           PORTB&=~0x01;
        }
        
        
    };
}