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/*

 * sendLeds.c

 *

 *  Created on: 17 Aug 2019

 *      Author: Mike

 */

#include "main.h"

#include "libWS2812/leds.h"

#include "libWS2812/spiInterface.h"

#include "sendLeds.h"

#include <stdint.h>

/* This is xoroshiro128+ 1.0, our best and fastest small-state generator

 for floating-point numbers. We suggest to use its upper bits for

 floating-point generation, as it is slightly faster than

 xoroshiro128**. It passes all tests we are aware of except for the four

 lower bits, which might fail linearity tests (and just those), so if

 low linear complexity is not considered an issue (as it is usually the

 case) it can be used to generate 64-bit outputs, too; moreover, this

 generator has a very mild Hamming-weight dependency making our test

 (http://prng.di.unimi.it/hwd.php) fail after 5 TB of output; we believe

 this slight bias cannot affect any application. If you are concerned,

 use xoroshiro128++, xoroshiro128** or xoshiro256+.

 We suggest to use a sign test to extract a random Boolean value, and

 right shifts to extract subsets of bits.

 The state must be seeded so that it is not everywhere zero. If you have

 a 64-bit seed, we suggest to seed a splitmix64 generator and use its

 output to fill s.

 NOTE: the parameters (a=24, b=16, b=37) of this version give slightly

 better results in our test than the 2016 version (a=55, b=14, c=36).

 */

static inline uint64_t

rotl (const uint64_t x, int k)

{

  return (x << k) | (x >> (64 - k));

}

static uint64_t s[2] =

  { 102, 33 };

uint64_t

next (void)

{

  const uint64_t s0 = s[0];

  uint64_t s1 = s[1];

  const uint64_t result = s0 + s1;

  s1 ^= s0;

  s[0] = rotl (s0, 24) ^ s1 ^ (s1 << 16); // a, b

  s[1] = rotl (s1, 37); // c

  return result;

}

#if defined WS2812

frgbw_t led0 = { 128, 0, 0, 0 };

frgbw_t led1 = { 128, 0, 0, 2 };

frgbw_t ledZ = { 0,0,0 };

#else

frgbw_t led0 =

  { 128, 0, 0, 0 };

frgbw_t led1 =

  { 128, 0, 0, 2 };

frgbw_t ledZ =

  { 0, 0, 0, };

#endif

int counter = 1;

void

sendLeds ()

{

  initCode ();

  codeReset ();

  int target = 128;

  counter--;

  if (counter == 0)

    {

      counter = (next () & 0xF0) + 16;

      led0.red = next () & 0xFF;

      led0.green = next () & 0xFF;

      led0.blue = next () & 0xFF;

#if defined WS2812

      led0.white = 0;

      // led0.white = next() & 0xFF;

#endif

      led1.red = next () & 0xFF;

      led1.green = next () & 0xFF;

      led1.blue = next () & 0xFF;

#if defined WS2812

      led1.white = 0;

      //led1.white = next() & 0xFF;

#endif

    }

  if (led1.fader < target)

    led1.fader++;

  if (led1.fader > target)

    led1.fader--;

  if ((counter & 8) == 0)

    target = (next () & 0x70) + 0x00;

  codeFRGBW (led0);

  codeFRGBW (led1);

  // send terminal

  codeStop ();

  sendCode (); // send coded pattern

}