Geigercounter/Geigerzaehler/main.c

/*
 * Created			:	28.02.2019 09:07:22
 * Author			:	John Ditgens, Alexander Brandscheidt
 * Git-Repository	:	https://gitea.Railduction.eu/JohnD/Geigerzaehler.git
 *
 * MController		:	AtMega328P
 * Board			:	Arduino Nano
 */ 
#define F_CPU 20000000UL 					// Clock speed: 20 MHz	- Maximum of AtMega328P

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

// Global variable declaration
uint8_t 

int main(void)
{
    DDRD &= ~(1<<2); 					// Activate PD2
    DDRD &= ~(1<<3);					// Activate PD3
										
	PORTD |= (1<<2);					// Enable Pull Up Resistor Pin D2
	PORTD |= (1<<3);					// Enable Pull Up Resistor Pin D3
	
	// Interrupt for INT0	Pin-D2	High-voltage check
    EICRA |= (1 << ISC01)|(0 << ISC00); // Only at falling edge		[1|0]
    EIMSK |= (1 << INT0);				// Activate Interrupt INT0
    
	// Interrupt for INT1	Pin-D3	Counter-click
    EICRA |= (1 << ISC11)|(1 << ISC10);	// Only at rising edge		[1|1]
    EIMSK |= (1 <<INT1);				// Activate Interrupt INT1
	
    sei();		// Activate global interrupts
	
	// Endless loop
    while (1) 
    {
    }
}

/*
 * Interrupt-handler
 * ISR - Interrupt service routine
 */
// Address: 0x001	INT0
ISR(INT0_vect)
{

	reti();		// Exit interrupt-handler
}


ISR(INT1_vect)
{
	
	reti();		// Exit interrupt-handler
}
1