mikrokontrollersystemer-prosjekt/prosjekt.X/fan-speed.h

/* 
 * File:   fanseeeed.h
 * Author: inami, Helle Augland Grasmo
 *
 * Created on 13. mars 2024, 13:38
 */



#ifndef FANSEEEED_H
#define	FANSEEEED_H

#ifdef	__cplusplus
extern "C" {
#endif

#include <stdbool.h>
#include <float.h>    
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <math.h>
#include <avr/interrupt.h>
#include <avr/io.h>
    
    /*
     The code has inspiration from "Getting Started with Analog comparator(AC)" by Microchip for setting up analog comparrator. 
     *          web link: https://ww1.microchip.com/downloads/aemDocuments/documents/MCU08/ApplicationNotes/ApplicationNotes/TB3211-Getting-Started-with-AC-DS90003211.pdf
     * and inspiration form practice 6 for TCA0 setup
     */
    
// Fan history variables
extern volatile uint16_t fan1_history[512];
extern volatile uint16_t fan2_history[512];
// Fan history index variable
extern volatile uint16_t fan1_history_index;
extern volatile uint16_t fan2_history_index;
    
    // INITALICE TIMER COUNTER
    void init_TCA0();    
    
    // UPDATE TIMER PERIOD
    void TCA0_update_period_ms (uint16_t timer_period);
    
    // TAKES INN A TIME AND A THE COUNTED FAN DIPS 
    // RETURNS THE RPM OF THE FAN
    uint16_t RPM_calculation(uint16_t edge_counter, uint16_t time_ms);
    
    // INITIALISING FAN PORTS
    void init_fan_gpio();
    
    // INIT AC0 TO COMPARE PD6 AND PD7
    void init_AC0();
    
    // INIT AC1 TO COMPARE PD4 AND PD7 
    void init_AC1();
    
#ifdef	__cplusplus
}
#endif

#endif	/* FANSEEEED_H */