From 885e34ef906d7d11e83b8fafa0b6f3b3653f44fd Mon Sep 17 00:00:00 2001
From: Elwin Hammer <elwinhamer@gmail.com>
Date: Sat, 18 May 2024 23:19:58 +0200
Subject: Converted ESP code to Arduino

---
 .../neo/arduino-neopuzzle/arduino-neopuzzle.ino    | 84 ++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 main/puzzle/neo/arduino-neopuzzle/arduino-neopuzzle.ino

diff --git a/main/puzzle/neo/arduino-neopuzzle/arduino-neopuzzle.ino b/main/puzzle/neo/arduino-neopuzzle/arduino-neopuzzle.ino
new file mode 100644
index 0000000..8febdea
--- /dev/null
+++ b/main/puzzle/neo/arduino-neopuzzle/arduino-neopuzzle.ino
@@ -0,0 +1,84 @@
+#include <Wire.h>
+#include <Adafruit_NeoTrellis.h>
+
+#define MATRIX_SIZE 8
+#define INT_PIN 5 // Interrupt pin for the NeoTrellis
+
+enum NeoState {
+    NEO_UNINITIALIZED,
+    NEO_PLAYING,
+    NEO_SOLVED
+};
+
+Adafruit_NeoTrellis trellis;
+NeoState neoState = NEO_UNINITIALIZED;
+
+// Initialize the NeoTrellis matrix
+void initializeNeoMatrix() {
+    if (!trellis.begin()) {
+        Serial.println("Failed to initialize NeoTrellis");
+        while (1); // Hold here if initialization fails
+    }
+
+    // Set all buttons to listen for presses and releases
+    for (int i = 0; i < MATRIX_SIZE; i++) {
+        for (int j = 0; j < MATRIX_SIZE; j++) {
+            trellis.activateKey(i * MATRIX_SIZE + j, SEESAW_KEYPAD_EDGE_RISING, true);
+            trellis.activateKey(i * MATRIX_SIZE + j, SEESAW_KEYPAD_EDGE_FALLING, true);
+            trellis.setPixelColor(i * MATRIX_SIZE + j, 0x000000); // Turn off LED
+        }
+    }
+    trellis.show();
+    neoState = NEO_PLAYING;
+}
+
+// Callback to handle button presses
+void buttonCallback(uint8_t x) {
+    uint8_t i = x / MATRIX_SIZE;
+    uint8_t j = x % MATRIX_SIZE;
+
+    // Toggle the central button and adjacent LEDs
+    toggleAdjacentLEDs(i, j);
+    if (isNeoPuzzleSolved()) {
+        neoState = NEO_SOLVED;
+        Serial.println("The NeoTrellis puzzle is solved!");
+        // Additional actions upon solving the puzzle can go here
+    }
+    trellis.show();
+}
+
+void toggleAdjacentLEDs(int x, int y) {
+    int idx = x * MATRIX_SIZE + y;
+    trellis.setPixelColor(idx, trellis.getPixelColor(idx) ^ 0xFFFFFF); // Toggle LED color
+
+    // Toggle adjacent LEDs
+    if (x > 0) trellis.setPixelColor((x-1) * MATRIX_SIZE + y, trellis.getPixelColor((x-1) * MATRIX_SIZE + y) ^ 0xFFFFFF);
+    if (x < MATRIX_SIZE - 1) trellis.setPixelColor((x+1) * MATRIX_SIZE + y, trellis.getPixelColor((x+1) * MATRIX_SIZE + y) ^ 0xFFFFFF);
+    if (y > 0) trellis.setPixelColor(x * MATRIX_SIZE + (y-1), trellis.getPixelColor(x * MATRIX_SIZE + (y-1)) ^ 0xFFFFFF);
+    if (y < MATRIX_SIZE - 1) trellis.setPixelColor(x * MATRIX_SIZE + (y+1), trellis.getPixelColor(x * MATRIX_SIZE + (y+1)) ^ 0xFFFFFF);
+}
+
+bool isNeoPuzzleSolved() {
+    for (int i = 0; i < MATRIX_SIZE; i++) {
+        for (int j = 0; j < MATRIX_SIZE; j++) {
+            if (trellis.getPixelColor(i * MATRIX_SIZE + j) != 0x000000) return false; // If any LED is on, puzzle is not solved
+        }
+    }
+    return true;
+}
+
+void setup() {
+    Serial.begin(115200);
+    trellis.begin(INT_PIN);
+    trellis.setBrightness(50); // Set brightness of LEDs (0-255)
+    initializeNeoMatrix();
+    trellis.registerCallback(buttonCallback);
+}
+
+void loop() {
+    if (neoState == NEO_PLAYING) {
+        if (trellis.read()) { // If there was a button event
+            trellis.show(); // Update the display
+        }
+    }
+}
-- 
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