//
// Created by servostar on 27.10.23.
//

#include "button.h"

// ---------------------------------------
//
// DDR set bit of port to either input or output
// PORTx set bit of port value
// PINx read voltage of bit of port D

void init() {
    // ---------------------------------------
    // set Port B to output
    // we will write through B5
    SET_OUTPUT(DDRB, DDB5);
    CLR_BIT(PORTB, DDB5);

    // ---------------------------------------
    // setup input port
    // we will read through D2/D3

    // set Port D to input (bit 2/3, remember bit 0/1 are for UART)
    SET_INPUT(DDRD, DDD2);
    SET_INPUT(DDRD, DDD3);
    // put 5V on input (make it pull up resistor)
    SET_BIT(PORTD, DDD2);
    SET_BIT(PORTD, DDD3);
}

void loop() {

    // poll voltage of pin 2 of port D
    if (!GET_BIT(PIND, PIND2)) {
        SET_BIT(PORTB, DDB5);
    }

    // poll voltage of pin 3 of port D
    if (!GET_BIT(PIND, PIND3)) {
        CLR_BIT(PORTB, DDB5);
    }
}