mikrokontrollersystemer-prosjekt/prosjekt.X/fan_speeeed.c

#include "fan_speeeed.h"

void TCA0_init() {
TCA0.SINGLE.INTCTRL = TCA_SINGLE_OVF_bm ;
TCA0.SINGLE.CTRLA = TCA_SINGLE_ENABLE_bm | TCA_SINGLE_CLKSEL_DIV1024_gc ; /* Sysclk /1024 */
TCA0.SINGLE.PERBUF = 0x0F42;
}

void TCA0_update_period_ms() {
TCA0.SINGLE.PERBUF = (F_CPU*(1/timer_period)/1024); /* F_CPU * F_IRQ / TCA_prescaler */
}

int read_input_get_RPM() {
    
    fan_speed=(voltage_value_counter/timer_period)*6000*3;
    voltage_value_counter = 0;
    return fan_speed;
}

void PORT_init(){
    PORTB.PIN2CTRL = PORT_ISC_FALLING_gc;
}



ISR ( TCA0_OVF_vect ) {
    read_input_get_RPM();
    
    TCA0.SINGLE.INTFLAGS = TCA_SINGLE_OVF_bm ;
}

ISR(PORTB_PORT_vect){
    PORTB.INTFLAGS = PIN2_bm;
    voltage_value_counter ++;
}