fancy_leds.h

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/*
 * Copyright (C) 2014 Freie Universität Berlin
 * Copyright (C) 2015 Zolertia SL
 *
 * This file is subject to the terms and conditions of the GNU Lesser General
 * Public License v2.1. See the file LICENSE in the top level directory for more
 * details.
 */
 
#ifndef FANCY_LEDS_H
#define FANCY_LEDS_H
 
#include "board_common.h"
 
#ifdef __cplusplus
 extern "C" {
#endif
 
/* Take LED_COLOR as argument, i.e LED0 */
#define LED_FADE(led)                         \
  volatile int i;                             \
  int k, j;                                   \
  LED_FADE_EXPAND(led)
 
#define LED_FADE_EXPAND(led)                  \
  for(k = 0; k < 800; ++k) {                  \
    j = k > 400 ? 800 - k : k;                \
    led##_ON;                                 \
    for(i = 0; i < j; ++i) {                  \
      __asm__("nop");                             \
    }                                         \
    led##_OFF;                                \
    for(i = 0; i < 400 - j; ++i) {            \
      __asm__("nop");                             \
    }                                         \
  }
 
#define LED_RAINBOW()                         \
  volatile int i;                             \
  int k,j;                                    \
  LED_FADE_EXPAND(LED3);                      \
  LED_FADE_EXPAND(LED0);                      \
  LED_FADE_EXPAND(LED4);                      \
  LED_FADE_EXPAND(LED2);                      \
  LED_FADE_EXPAND(LED1);
#ifdef __cplusplus
} /* end extern "C" */
#endif
#endif /* FANCY_LEDS_H */