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86 lines
1.8 KiB
C
86 lines
1.8 KiB
C
/*
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* Copyright (C) 2016 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup tests
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* @{
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*
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* @file
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* @brief Test application for the LPD8808 LED strip driver
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*
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* Refer to the accompanying README.md for more information.
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*
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*
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* @}
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*/
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#include <string.h>
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#include <stdio.h>
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#include "xtimer.h"
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#include "lpd8808.h"
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#include "lpd8808_params.h"
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/**
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* @brief Switch to the next LED every 10ms
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*/
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#define STEP (10 * 1000U)
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/**
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* @brief Allocate the device descriptor
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*/
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static lpd8808_t dev;
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/**
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* @brief Allocate a color_rgb_t struct for each LED on the strip
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*/
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static color_rgb_t leds[LPD8808_PARAM_LED_CNT];
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int main(void)
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{
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xtimer_ticks32_t now = xtimer_now();
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int pos = 0;
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int step = 1;
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color_hsv_t col = { 0.0, 1.0, 1.0 };
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/* initialize all LED color values to black (off) */
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memset(leds, 0, sizeof(color_rgb_t) * LPD8808_PARAM_LED_CNT);
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/* initialize the driver */
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lpd8808_init(&dev, &lpd8808_params[0]);
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while (1) {
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/* change the active color by running around the hue circle */
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col.h += 1.0;
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if (col.h > 360.0) {
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col.h = 0;
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}
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/* set the active LED to the active color value */
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memset(&leds[pos], 0, sizeof(color_rgb_t));
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pos += step;
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color_hsv2rgb(&col, &leds[pos]);
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/* apply the values to the LED strip */
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lpd8808_load_rgb(&dev, leds);
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/* switch direction once reaching an end of the strip */
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if ((pos == (LPD8808_PARAM_LED_CNT - 1)) || (pos == 0)) {
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step *= -1;
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}
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xtimer_periodic_wakeup(&now, STEP);
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}
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return 0;
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}
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