#include "fan speeeed.h"
RTC.PITCTRLA = RTC_PERIOD_CYC32768_gc | RTC_PITEN_bm;

int RTC_init() {
    uint8_t temp;
    /* Initialize 32.768kHz Oscillator: */
    /* Disable oscillator: */
    temp = CLKCTRL.XOSC32KCTRLA;
    temp &= ~CLKCTRL_ENABLE_bm;
    /* Writing to protected register */
    ccp_write_io((void*) &CLKCTRL.XOSC32KCTRLA, temp);

    while (CLKCTRL.MCLKSTATUS & CLKCTRL_XOSC32KS_bm) {
        ; /* Wait until XOSC32KS becomes 0 */
    }
    /* SEL = 0 (Use External Crystal): */
    temp = CLKCTRL.XOSC32KCTRLA;
    temp &= ~CLKCTRL_SEL_bm;
    /* Writing to protected register */
    ccp_write_io((void*) &CLKCTRL.XOSC32KCTRLA, temp);

    /* Enable oscillator: */
    temp = CLKCTRL.XOSC32KCTRLA;
    temp |= CLKCTRL_ENABLE_bm;
    /* Writing to protected register */
    ccp_write_io((void*) &CLKCTRL.XOSC32KCTRLA, temp);

    /* Initialize RTC: */
    while (RTC.STATUS > 0) {
        ; /* Wait for all register to be synchronized */
    }
    /* 32.768kHz External Crystal Oscillator (XOSC32K) */
    RTC.CLKSEL = RTC_CLKSEL_TOSC32K_gc;
    /* Run in debug: enabled */
    RTC.DBGCTRL = RTC_DBGRUN_bm;

    RTC.PITINTCTRL = RTC_PI_bm; /* Periodic Interrupt: enabled */

    RTC.PITCTRLA = RTC_PERIOD_CYC32768_gc /* RTC Clock Cycles 32768 */
            | RTC_PITEN_bm; /* Enable: enabled */

}

int fan_speed(float voltage_value) {
    int counter = 0;
    int old_value = 0;
    
    if (voltage_value > 300 && old_value < 300) {
        counter++;
    }
    voltage_value = old_value;
    return old_value;
}

inline void fan_speed_toggle() {
    float fan_speed;
    float t = 0;
    f = ((1 / t)*1000);
    fan_speed = (f * 60) / 2;
    return fan_speed;
}

ISR(RTC_PIT_vect) {
    RTC.PITINTFLAGS = RTC_PI_bm;
    fan_speed_toggle();
}

int main(void) {
    fan_speed();
    RTC_init();
    sei();
    while (1) {

    }
}