#include "fan_speeeed.h"
#include "uart.h"

uint16_t timer_period_ms = 1;
uint16_t fan_speed;
volatile uint16_t falling_edge_counter = 0;

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_update_period_ms();
}

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

uint16_t RPM_calculation() {
    fan_speed = (falling_edge_counter/timer_period_ms)*6000*3;
    falling_edge_counter= 0;
    printf("%u", fan_speed);
    return fan_speed;
}

void PORT_init(){
    //compare or capture
    //TCB3.CCMP = 0x00;
    //count
    TCB3.CNT = 0x00;
    
    PORTA.IN = PIN0_bm;
    PORTA.PIN0CTRL =   PORT_PULLUPEN_bm;
    
    //PORTD.PIN2CTRL = PORT_ISC_FALLING_gc | 0b01000000;
//	TCB3.CTRLB =0<< TCB_ASYNC_bp       /* Asynchronous Enable: disabled */|0<< TCB_CCMPEN_bp    /* Pin Output Enable: disabled */|0<< TCB_CCMPINIT_bp  /* Pin Initial State: disabled */| TCB_CNTMODE_FRQ_gc;/* Input Capture Frequency measurement */
//	TCB3.EVCTRL =1<< TCB_CAPTEI_bp    /* Event Input Enable: enabled */|0<< TCB_EDGE_bp    /* Event Edge: disabled */|0<< TCB_FILTER_bp;/* Input Capture Noise Cancellation Filter: disabled */
//	TCB3.INTCTRL =1<< TCB_CAPT_bp     /* Capture or Timeout: enabled */|0<< TCB_OVF_bp;/* OverFlow Interrupt: disabled */
//	TCB3.CTRLA = TCB_CLKSEL_DIV1_gc     /* CLK_PER */|1<< TCB_ENABLE_bp   /* Enable: enabled */|0<< TCB_RUNSTDBY_bp /* Run Standby: disabled */|0<< TCB_SYNCUPD_bp  /* Synchronize Update: disabled */|0<< TCB_CASCADE_bp;/* Cascade Two Timer/Counters: disabled */
    
    //ASYNC disabled; CCMPINIT disabled; CCMPEN disabled; CNTMODE FRQPW; 
    TCB3.CTRLB = 0x04;

    //DBGRUN disabled; 
    //TCB3.DBGCTRL = 0x00;

    //FILTER disabled; EDGE disabled; CAPTEI enabled; 
    TCB3.EVCTRL = 0x01;

    //OVF disabled; CAPT enabled; 
    TCB3.INTCTRL = 0x01;

    //OVF disabledAPT disabled; 
    //TCB3.INTFLAGS = 0; CAPT disabled; 
    //TCB3.INTFLAGS = 0x00;

    //Temporary Value
    //TCB3.TEMP = 0x00;

    
    EVSYS.CHANNEL0 = 0x40;
    //EVSYS.SWEVENTA = 0x01;
    EVSYS.USERTCB3CAPT = 0x01;
    
    //RUNSTDBY disabled; CASCADE disabled; SYNCUPD disabled; CLKSEL DIV1; ENABLE enabled; 
    TCB3.CTRLA = 0x01;
}

void TCB0_Init(void){
    TCB3.CTRLB = TCB_CNTMODE_FRQPW_gc;    /* Input Capture Frequency */
    TCB3.EVCTRL = TCB_CAPTEI_bm;        /* Event Input Enable: enabled */ 
    TCB3.EVCTRL |= (1 << TCB_CAPTEI_bp | 1 << TCB_EDGE_bp | 1 << TCB_FILTER_bp);  /* Event Input Enable: enabled */ 
    TCB3.INTCTRL = TCB_CAPT_bm;         /* Capture or Timeout: enabled */
    TCB3.CTRLA = TCB_CLKSEL_DIV1_gc     /* CLK_PER/1 (From Prescaler) - This is needed to be able to count to 40 Hz with a 4 Mhz system clock */                                             
          | TCB_ENABLE_bm    /* Enable: enabled */
          | TCB_RUNSTDBY_bm;  /* Run Standby: enabled */
} 
void EVSYS_Init(void)
{
    /* Zero-cross detector 0 out linked to event channel 0 */
    EVSYS.CHANNEL0 = EVSYS_CHANNEL0_PORTA_PIN5_gc;
    /* TCB uses event channel 0 */
    EVSYS.USERTCB0CAPT = EVSYS_USER_CHANNEL0_gc;
}
 
void PORT_Init(void)
{
    PORTB.OUTSET |= PIN5_bm;
    PORTB.DIRSET |= PIN5_bm;  
}
//-----------------------------------------------------------------------------------------------------
//-------------------------------------- S E T U P-----------------------------------------------------

/*
ISR ( TCA0_OVF_vect ) {
    cli();
    RPM_calculation();
    
    TCA0.SINGLE.INTFLAGS = TCA_SINGLE_OVF_bm ;
    
    sei();
}*/

void printnie(uint8_t en, uint8_t to){
    printf("CNT %u", en);
    printf("ccmp %u", to);
}

ISR (TCB3_INT_vect){
    uint16_t yo = TCB3.CNT;
   
    uint16_t stewui = TCB3.CCMP; 
    
    printnie(yo, stewui);
    TCB3.INTFLAGS = 0x03;
    //TCB3.INTFLAGS = PIN0_bm;
    
}


/*
ISR(PORTD_PORT_vect){
   // cli();
    falling_edge_counter ++;
    
    PORTD.INTFLAGS = PIN2_bm;
    //sei();
}
 * */