/*
* Light_WS2812 library example - RGB_blinky
*
* cycles one LED through red, green, blue
*
* This example is configured for a ATtiny85 with PLL clock fuse set and
* the WS2812 string connected to PB4.
*/

#include "project.h"


#define N_COLORS (288*2)
#define N_LEDS 24


struct RGB led[N_LEDS];



static uint32_t ticks;          /* 4 ticks per second */


static void
do_hand (int w, uint8_t r, uint8_t g, uint8_t b)
{
  int i, j;

  for (i = 0; w >= 50; ++i, w -= 50);

  i %= N_LEDS;
  j = i + 1;
  j %= N_LEDS;

  led[i].r += (r * (49 - w)) / 49;
  led[i].g += (g * (49 - w)) / 49;
  led[i].b += (b * (49 - w)) / 49;

  led[j].r += (r * w) / 49;
  led[j].g += (g * w) / 49;
  led[j].b += (b * w) / 49;

}


static void
tick (void)
{
  uint32_t r;
  ticks++;



  if ((ticks%20)<10)  {
  	PORTD&=~(1<<5);
  } else {
  	PORTD|=1<<5;
 }


  memset (led, 0, sizeof (led));

  r = ticks % 1200;

  do_hand (r, 255, 0, 0);

  r = (ticks / 60) % 1200;

  do_hand (r, 0, 255, 0);

  r = (ticks / 720) % 1200;

  

  do_hand (r, 0, 0, 255);

  ws2812_setleds (led, N_LEDS);

}

static void off(void)
{
  memset (led, 0, sizeof (led));
  ws2812_setleds (led, N_LEDS);
}

int get_int(char *buf)
{
int r;

r=buf[0]-'0';
r*=10;
r+=buf[1]-'0';

return r;
}


static void command_dispatch(char *buf)
{
uint32_t r=ticks/20;
int h,m,s;

if ((buf[2]==':') && (buf[5]==':')) {
	h=get_int(buf);
	m=get_int(buf+3);
	s=get_int(buf+6);

	r=h;
	r*=60;
	r+=m;
	r*=60;
	r+=s;
	ticks=r*20;
}


h=r/3600;
r -= h*3600;
m=r/60;
r -= m*60;
s=r;
printf("%02d.%02d.%02d\n",h,m,s);
}



static void serial_dispatch(void)
{
static char buf[64];
static int bptr=0;

int r=usb_serial_getchar();
if (r==-1) return;


if (r==10) {
	buf[bptr]=0;
	command_dispatch(buf);
	bptr=0;
	return;
}

buf[bptr++]=r;

if (bptr==(sizeof(buf) -1 )) {
	bptr=0;
	return;
}
}



int
main (void)
{
  int i, j, k;

  setup_clocks ();
  off();
  stdio_init ();


  DDRD|=1<<5;

  ticks=0;
  ticks*=60;
  ticks+=30;
  ticks*=60;
  ticks+=15;
  ticks*=20;




  while (1)
    {
      tick ();
      serial_dispatch();
      _delay_ms (50);          // wait for 500ms.
    }
}