#define F_CPU 9600000

#include <ctype.h>

#include <avr/io.h>
//#include <avr/iom8.h>
#include <avr/interrupt.h>
#include <avr/signal.h>
#include <avr/wdt.h>
#include <avr/delay.h>
#include <stdlib.h>
#include "usiTwiSlave.h"
#define outp(a, b) b = a

#define i2cAddress 0x18
#define DDRB_MASK  (1<< PB1)|(1<< PB3)|(1<< PB4)
#define MAX 511
#define TIME 1

int red = 0;
int green = 0;
int blue = 0;
int h = 0;
int brightness = 100;

void hue2rgb(int hue){
	int hd = hue / 42;   // 42 == 252/6,  252 == H_MAX
    int hi = hd % 6;   // gives 0-5
    int f = hue % 42; 
    int fs = f * 6;
    switch( hi ) {
        case 0:
            red = 252;     green = fs;      blue = 0;
           break;
        case 1:
            red = 252-fs;  green = 252;     blue = 0;
            break;
        case 2:
            red = 0;       green = 252;     blue = fs;
            break;
        case 3:
            red = 0;       green = 252-fs;  blue = 252;
            break;
        case 4:
            red = fs;      green = 0;       blue = 252;
            break;
        case 5:
            red = 252;     green = 0;       blue = 252-fs;
            break;
    }
}



void delayms(uint16_t millis) {
  uint16_t loop;
  while ( millis ) {
    _delay_ms(1);
    millis--;
  }
}


void setup(){
	DDRB = DDRB_MASK;
	TCCR0A=_BV(WGM00)|_BV(COM0A1);
	TCCR0B=_BV(CS00)|_BV(WGM01)|_BV(COM0B1);
}


int main(void) {
  setup();
  int i = 0;  

  uint8_t rxData;

  while(1) {
	for(int j = 0; j<256; j++){
		hue2rgb(j);
		OCR0B=red * (brightness/100);
		OCR1B=green * (brightness/100);
		delayms(1);
	}
  }
  return 0;
}






















	/*
	for(i=0;i<MAX;i++){
		OCR1A=i;  //works for blue, PB3
		OCR1B=i;  //green
		OCR0A=i/4;
		delayms(TIME);
	}

	for(i=MAX;i>0;i--){
		OCR1A=i;  //works for blue, PB3
		OCR1B=i;
		OCR0A=i/4;
		delayms(TIME);
	}
	*/