From 242af86936e6b551321f2a73c4f7587a51d66315 Mon Sep 17 00:00:00 2001
From: Peter Ludikovsky <peter@ludikovsky.name>
Date: Wed, 2 Oct 2019 12:00:20 +0200
Subject: [PATCH] Inital Commit

---
 .gitignore     |  1 +
 ColorStrip.ino | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++
 LICENSE.txt    | 24 ++++++++++++++++++++
 README.md      | 29 +++++++++++++++++++++++++
 4 files changed, 113 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 ColorStrip.ino
 create mode 100644 LICENSE.txt
 create mode 100644 README.md

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..eee4db0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+*.hex
diff --git a/ColorStrip.ino b/ColorStrip.ino
new file mode 100644
index 0000000..544d752
--- /dev/null
+++ b/ColorStrip.ino
@@ -0,0 +1,59 @@
+#include <FastLED.h>
+
+#define NUM_LEDS 50
+#define DATA_PIN 4
+#define INTR_PIN 2
+#define VIZUALIZATIONS 2
+
+CRGB pixels[NUM_LEDS];
+unsigned char offset = 0;
+void (*viz[VIZUALIZATIONS])(unsigned char);
+volatile unsigned char currentViz = 0;
+
+void viz1(unsigned char offset) {
+  for (unsigned char i = 0; i < NUM_LEDS; i++)
+    pixels[(i + offset) % NUM_LEDS] = CRGB(128 + floor(127 * sin(2 * 3.1415926 * i / NUM_LEDS)), 0, 0);
+}
+void viz2(unsigned char offset) {
+  for (unsigned char i = 0; i < NUM_LEDS; i++)
+    pixels[i] = 0;
+  pixels[offset % NUM_LEDS]        = CRGB(0x0F, 0xF, 0xF);
+  pixels[(offset + 1) % NUM_LEDS]  = CRGB(0x1F, 0xE, 0xE);
+  pixels[(offset + 2) % NUM_LEDS]  = CRGB(0x2F, 0xD, 0xD);
+  pixels[(offset + 3) % NUM_LEDS]  = CRGB(0x3F, 0xC, 0xC);
+  pixels[(offset + 4) % NUM_LEDS]  = CRGB(0x4F, 0xB, 0xB);
+  pixels[(offset + 5) % NUM_LEDS]  = CRGB(0x5F, 0xA, 0xA);
+  pixels[(offset + 6) % NUM_LEDS]  = CRGB(0x6F, 0x9, 0x9);
+  pixels[(offset + 7) % NUM_LEDS]  = CRGB(0x7F, 0x8, 0x8);
+  pixels[(offset + 8) % NUM_LEDS]  = CRGB(0x8F, 0x7, 0x7);
+  pixels[(offset + 9) % NUM_LEDS]  = CRGB(0x9F, 0x6, 0x6);
+  pixels[(offset + 10) % NUM_LEDS] = CRGB(0xAF, 0x5, 0x5);
+  pixels[(offset + 11) % NUM_LEDS] = CRGB(0xBF, 0x4, 0x4);
+  pixels[(offset + 12) % NUM_LEDS] = CRGB(0xCF, 0x3, 0x3);
+  pixels[(offset + 13) % NUM_LEDS] = CRGB(0xDF, 0x2, 0x2);
+  pixels[(offset + 14) % NUM_LEDS] = CRGB(0xEF, 0x1, 0x1);
+  pixels[(offset + 15) % NUM_LEDS] = CRGB(0xFF, 0x0, 0x0);
+}
+
+void changeViz(void) {
+  currentViz = (currentViz + 1) % VIZUALIZATIONS;
+}
+
+void setup() {
+  FastLED.addLeds<WS2812B, DATA_PIN>(pixels, NUM_LEDS);
+  FastLED.setBrightness(255);
+  for (int i = 0; i < NUM_LEDS; i++)
+    pixels[i] = CRGB(0, 0, 0);
+  FastLED.show();
+  viz[0] = &viz1;
+  viz[1] = &viz2;
+  pinMode(INTR_PIN, INPUT_PULLUP);
+  attachInterrupt(digitalPinToInterrupt(INTR_PIN), changeViz, FALLING);
+}
+
+void loop() {
+  (*viz[currentViz])(offset);
+  FastLED.show();
+  delay(100);
+  offset++;
+}
diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..bbda492
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,24 @@
+Copyright (c) 2019 Peter Ludikovsky, All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    Redistributions of source code must retain the above copyright notice, this
+    list of conditions and the following disclaimer.  Redistributions in binary
+    form must reproduce the above copyright notice, this list of conditions and
+    the following disclaimer in the documentation and/or other materials
+    provided with the distribution.
+    Neither the name of the copyright holder nor the names of its contributors
+    may be used to endorse or promote products derived from this software
+    without specific prior written permission. 
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..a9e931a
--- /dev/null
+++ b/README.md
@@ -0,0 +1,29 @@
+`/usr/space` ColorStrip
+=======================
+
+Code für die LED-Beleuchtung beim Eingang zum `/usr/space`
+
+Specs
+-----
+
+-   Arduino UNO
+    -   Data Pin: 4
+    -   Interrupt Pin: 2
+-   LED Strip:
+    -   5m lang
+    -   10 Pixel/m
+    -   3 RGB-LEDs/Pixel
+    -   WS2818B Controller
+
+Code
+----
+
+Neue Visualisierungen dürfen gerne hinzugefügt werden. Die Funktionen
+dafür brauchen die Signatur `void func(unsigned char)` und müssen als
+Funktions-Pointer zum Array `viz` hinzugefügt werden (in `setup()`). Der
+einzige Parameter ist ein Offset, der nach jedem Tick (derzeit 100ms)
+erhöht wird und im Bereich 0-255 liegt.
+
+In der Funktion selbst müssen die Farbwerte für jedes Pixel in das Array
+`pixels` geschrieben werden, welches automatisch beim nächsten Refresh
+ausgegeben wird.