Форум РадиоКот

Код: Выделить всё

#define F_CPU 8000000
#include <avr/io.h>
#include <avr/interrupt.h>

uint8_t H, S, V;
volatile uint8_t color_update;

uint8_t r, g, b;
void hsv_to_rgb(void) 
{
uint8_t i, f, p, q, t;
  if( S == 0 ) 
  {
  OCR0A = OCR1B = OCR1A = V;
  }
  else
  {
  i = H/43;
  f = H%43;
  p = (V * (255 - S))/256;
  q = (V * ((10710 - (S * f))/42))/256;
  t = (V * ((10710 - (S * (42 - f)))/42))/256;
    switch(i)
    {
    case 0:
    r = V; g = t; b = p; break;
    case 1:
    r = q; g = V; b = p; break;
    case 2:
    r = p; g = V; b = t; break;
    case 3:
    r = p; g = q; b = V; break;         
    case 4:
    r = t; g = p; b = V; break;            
    case 5:
    default:
    r = V; g = p; b = q; break;
    }
  }

cli();
OCR0A = r; OCR1B = g; OCR1A = b;      
sei();
}

ISR(TIM0_OVF_vect) 
{
color_update++;
}

int   main(void)
{
DDRB |= (1 << PB4)|(1 << PB1)|(1 << PB0);

TCCR0A |= (1 << COM0A1)|(1<<WGM00)|(1<<WGM01);
TCCR0B |= (1<<CS01)|(1<<CS00);

OCR1C  = 0xFF;
TCCR1 |= (1 << COM1A1)|(1<<PWM1A)|(1<<CS12)|(1<<CS11)|(1<<CS10);
GTCCR |= (1 << COM1B1)|(1<<PWM1B)|(1<<PSR1)|(1<<PSR0);

TIMSK |= (1 << TOIE0);

OCR0A = 0;
OCR1B = 0;
OCR1A = 0;

sei();

V = 255;
S = 255;
H = 0;

while(1) 
{             
  if(color_update > 100)
  {
  color_update = 0;
  H++;
  hsv_to_rgb();
  }      
}
}