EmbeddedSystems/EmbeddedSystemsTHM/Taster.c

#include <avr/io.h>

void 
Taster_init (void){
	DDRD &= ~(0b111<<5);	// Set bit 5-7 of Data Direction Register D as input
	DDRC &= ~(1<<2);		// Set bit 2 of Data Direction Register C as input
	
	PORTD |= (0b111<<5);	// Initialize bit 5-7 of PORTD as for pull up resistor
	PORTC |= (1<<2);		// Initialize bit 2 of PORTC as for pull up resistor
}

uint8_t 
Taster1_get (void){
	return ((PIND & (1<<PIND7)) == 0);
}
uint8_t 
Taster2_get (void){
	return ((PIND & (1<<PIND6)) == 0);
}
uint8_t 
Taster3_get (void){
	return ((PIND & (1<<PIND5)) == 0);
}
uint8_t 
Taster4_get (void){
	return ((PINC & (1<<PINC2)) == 0);
}