ATmega88 @ 8MHz Taster 02

taster-02.c

/* taster_02.c ATmega88 @ 8MHz */
#include <avr/io.h>
#include <util/delay.h>
 
int main(void)
{
    DDRB = (1<<PB0);                  // PORTB Pin0 = Ausgang
    DDRD = ~((1<<PIND0)|(1<<PIND1));    // PORTD PIN0 und PIN1 = Eingang
    PORTD |= (1<<PD0);                    // internen Pull-Up Widerstand aktivieren
     
    while(1)
    {
        if (!(PIND & (1<<PIND0)))     // Wenn Taster = LOW
        {
            PORTB |= (1<<PB0);            // LED = ON
        }
         
        else if (PIND & (1<<PIND1))       // Wenn Taster = HIGH
        {
            PORTB &= ~(1<<PB0);           // LED = OFF
        }
    }
}