//  RGB kytka

//Import libraries
#include <xc.h>
#include <stdlib.h>

// PIC12F1571 configurations
// CONFIG1
#pragma config FOSC = INTOSC    //  (INTOSC oscillator; I/O function on CLKIN pin)
#pragma config WDTE = OFF       // Watchdog Timer Enable (WDT disabled)
#pragma config PWRTE = OFF      // Power-up Timer Enable (PWRT disabled)
#pragma config MCLRE = OFF      // MCLR Pin Function Select (MCLR/VPP pin function is digital input)
#pragma config CP = OFF         // Flash Program Memory Code Protection (Program memory code protection is disabled)
#pragma config BOREN = OFF       // Brown-out Reset Enable (Brown-out Reset disabled)
#pragma config CLKOUTEN = OFF   // Clock Out Enable (CLKOUT function is disabled. I/O or oscillator function on the CLKOUT pin)

// CONFIG2
#pragma config WRT = OFF        // Flash Memory Self-Write Protection (Write protection off)
#pragma config PLLEN = OFF      // PLL Enable (4x PLL disabled)
#pragma config STVREN = ON      // Stack Overflow/Underflow Reset Enable (Stack Overflow or Underflow will cause a Reset)
#pragma config BORV = LO        // Brown-out Reset Voltage Selection (Brown-out Reset Voltage (Vbor), low trip point selected.)
#pragma config LPBOREN = OFF    // Low Power Brown-out Reset enable bit (LPBOR is disabled)
#pragma config LVP = OFF        // Low-Voltage Programming Enable (High-voltage on MCLR/VPP must be used for programming)

#define _XTAL_FREQ           16000000

void Wait(unsigned int ms)                   // časovací funkce po 1 milisekundě
{
    for(int bb = 0; bb < ms; bb++) __delay_ms(1);
}

void main ()
{
    TRISA = 0; ANSELA = 0; LATA = 0; 		// nastavení digitáních výstupů na všech pinech
    OSCCON = 0b01111010; 					// nastavení interního oscillatoru na 16 MHz
    
	                                       // nastavení PWM na 3 kanálech (frekvence spínání 200 Hz)
    PWM1CON = 0b11000000; PWM2CON = 0b11000000; PWM3CON = 0b11000000;
    PWM1CLKCON = 0;       PWM2CLKCON = 0;       PWM3CLKCON = 0;
    PWM1PR = 65535;       PWM2PR = 65535;       PWM3PR = 65535;
    PWM1PH = 0;           PWM2PH = 0;           PWM3PH = 0;
    PWM1DC = 0;           PWM2DC = 0;           PWM3DC = 0;

  while(1)                                // nekonečná smyčka
  {
    PWM1DC = rand()*2; PWM2DC = rand()*2; PWM3DC = rand()*2;  // zápis náhodných hodnot pro PWM jednotlivých barev
    PWM1LD = 1; PWM2LD = 1; PWM3LD = 1;  				      // spuštění PWM s novými hodnotami
    Wait(10000);                         					  // čekej 10 sekund na změnu barvy 
  }
}