/*
 * File:   PWM_2.c
 * Author: kubalik
 *
 * Created on 25. unora 2016, 
 */



#include "p33EV32GM002.h"




//  je to v C:\Program Files (x86)\Microchip\xc16\v1.24\support\dsPIC33E\h
//  od radky 8852 je definovani tech TRIS
// dale si udelejte CntrlF a hledejet ve file *.h




/*  nasledujici makra nastavuji oscilator
 * hledame v header file 
 *      * Macros for setting device configuration registers  
*  pin OSC1 jako I/O pin
* vypinaji Watchdog - opet se podivejte do header file, co vsecno se da nastavit
*  */
_FOSCSEL( FNOSC_FRC )
_FOSC( OSCIOFNC_ON &  IOL1WAY_OFF)
_FWDT( FWDTEN_OFF )


        
        
unsigned int j;

/*
* 
 */
int main() {
    int i;
    
    i = 0;  /*  sem si dejte breakpoint !  */
    j = 0;


  TRISA = 0x0;
//  zapisujeme do celeho registru najednou

 
TRISB = 0x00;
PORTB = 0;
PORTA = 0;

ANSELB = 0;
ANSELA = 0; 


/* viz poznamka na konci */
IFS5bits.PWM1IF = 0;

/* 1:1 Prescaler */
PTCON2 = 0x0000;



/* Set PWM Periods on PHASEx Registers */
PHASE1 = 3685;
PHASE2 = 737;
PHASE3 = 921;
/* Set Duty Cycles */
PDC1 = 1228;
PDC2 = 210;
PDC3 = 84;
/* Set Dead Time Values */
DTR1 = DTR2 = DTR3 = 0;
ALTDTR1 = ALTDTR2 = ALTDTR3 = 0;
/* Set PWM Mode to Complementary */
IOCON1 = IOCON2 = IOCON3 = 0xC000;
/* Set Independent Time Bases, Edge-Aligned Mode and Independent Duty Cycles */
PWMCON1 = PWMCON2 = PWMCON3 = 0x0200;
/* Configure Faults */
FCLCON1 = FCLCON2 = FCLCON3 = 0x0003;
/* Enable PWM Module */
PTCON = 0x8000;


/* a jeste k tomu PWM1 generuje preruseni - strana 12 
 TRGIEN bit (PWMCON<10>).  */
PWMCON1 = 0x0600;

/* Configure Faults */
FCLCON1 = FCLCON2 = FCLCON3 = 0x0003;



/*To configure interrupts, 
 * the application software should first clear the interrupt flags, 
 * enable the interrupts (see the PTCON (Register 14-1), 
 * STCON (Register 14-4), and PWMCONx
(Register 14-12) registers),
 *  and finally, enable the PWM module. */

/* a  interrupty - strana 98 PWM.pdf */
PTCON = 0x0800;

/* finally  Enable PWM Module  */
PTCONbits.PTEN = 1;


/* povoluji preruseni od PWM1 */
IEC5bits.PWM1IE = 1;  
IFS5bits.PWM1IF = 0;


  /*  globalni povoleni preruseni, tohle se musi povolit, 
     * jinak nebude zadne preruseni krome TRAP   */
    INTCON2bits.GIE = 1;


while(1) {
    
    i++;   /* tady proste musi byt nejaka instrukce, jinak to nesimuluje interrupty */
}

return 0;
}



void __attribute__((interrupt, auto_psv)) _PWM1Interrupt   (void) {

    IFS5bits.PWM1IF = 0;
    /*  shazujeme pozadavkovy bit   */

    j++;  /*  sem si dejte breakpoint  */

} /* zaviraci od podprogramu _PWM1Interrupt
    retfie prida prekladac sam, je to dano atributem interrupt */