From 0306d4f74a31dbe1e270ef6a934a572861a32bc6 Mon Sep 17 00:00:00 2001
From: Jake Hillion <jake@hillion.co.uk>
Date: Sun, 26 Apr 2020 18:59:29 +0100
Subject: [PATCH] Arduino first attempt

---
 arduino/arduino.ino | 116 +++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 109 insertions(+), 7 deletions(-)

diff --git a/arduino/arduino.ino b/arduino/arduino.ino
index 08f1177..6fea865 100644
--- a/arduino/arduino.ino
+++ b/arduino/arduino.ino
@@ -3,6 +3,9 @@
 #define NUM_STRIPS 2
 #define NUM_LEDS_PER_STRIP 180
 
+#define NUM_LEDS_PER_SQUARE 12
+#define NUM_SQUARES_PER_STRIP 15
+
 #define PIN_0 12
 #define PIN_1 13
 
@@ -11,16 +14,115 @@ CRGB leds[NUM_STRIPS][NUM_LEDS_PER_STRIP];
 void setup() {
   FastLED.addLeds<NEOPIXEL, PIN_0>(leds[0], NUM_LEDS_PER_STRIP);
   FastLED.addLeds<NEOPIXEL, PIN_1>(leds[1], NUM_LEDS_PER_STRIP);
+
+  Serial.begin(9600);
 }
 
+int hex;
+int rgb;
+int led;
+
+int stored[3];
+
 void loop() {
-  for(int x = 0; x < NUM_STRIPS; x++) {
-    // This inner loop will go over each led in the current strip, one at a time
-    for(int i = 0; i < NUM_LEDS_PER_STRIP; i++) {
-      leds[x][i] = CRGB::Red;
-      FastLED.show();
-      leds[x][i] = CRGB::Black;
-      delay(100);
+  if (Serial.available() > 0) {
+    int data;
+    switch (data = Serial.read()) {
+      case '0':
+      case '1':
+      case '2':
+      case '3':
+      case '4':
+      case '5':
+      case '6':
+      case '7':
+      case '8':
+      case '9':
+      case 'a':
+      case 'b':
+      case 'c':
+      case 'd':
+      case 'e':
+      case 'f':
+        hex = hex << 2 + charMap(data);
+        break;
+      case 'n':
+        nextColour();
+        break;
+      case 'l': // end of LED
+        nextLed();
+        break;
+      case 'q':
+        complete();
+        break;
+      case 'r':
+        resetState();
+        break;
     }
   }
 }
+
+void nextColour() {
+  stored[rgb++] = hex;
+  hex = 0;
+}
+
+void nextLed() {
+  CRGB color = CRGB(stored[0], stored[1], stored[2]);
+    
+  int strip = led / NUM_SQUARES_PER_STRIP;
+  int start = (led * NUM_LEDS_PER_SQUARE) - (strip * NUM_LEDS_PER_STRIP);
+  
+  for (int i = start; i < start + NUM_LEDS_PER_SQUARE; i++) {
+    leds[strip][i] = color;
+  }
+  
+  rgb = hex = 0;
+}
+
+void complete() {
+  FastLED.show();
+  led = rgb = hex = 0;
+}
+
+void resetState() {
+  led = rgb = hex = 0;
+}
+
+int charMap(char that) {
+  switch (that) {
+    case '0':
+      return 0;
+    case '1':
+      return 1;
+    case '2':
+      return 2;
+    case '3':
+      return 3;
+    case '4':
+      return 4;
+    case '5':
+      return 5;
+    case '6':
+      return 6;
+    case '7':
+      return 7;
+    case '8':
+      return 8;
+    case '9':
+      return 9;
+    case 'a':
+      return 10;
+    case 'b':
+      return 11;
+    case 'c':
+      return 12;
+    case 'd':
+      return 13;
+    case 'e':
+      return 14;
+    case 'f':
+      return 15;
+  }
+  return -1;
+}