Initial implementation of HeisserDraht buzz wire game

ESP32-C3 based hot wire game with WS2812B LED effects, SSD1306 OLED display, debounced touch detection, and full game state machine (IDLE → COUNTDOWN → PLAYING → GAME_OVER). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-02-22 00:24:52 +01:00
commit 01e79a4eb2
9 changed files with 619 additions and 0 deletions
--- a/display.cpp
+++ b/display.cpp
@@ -0,0 +1,164 @@
+#include "display.h"
+#include "config.h"
+#include "game_logic.h"
+#include <Wire.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_SSD1306.h>
+
+static Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
+static unsigned long lastUpdateMs = 0;
+
+// ── Screens ─────────────────────────────────────────────────────────
+
+static void screenSplash() {
+  oled.clearDisplay();
+  oled.setTextColor(SSD1306_WHITE);
+
+  oled.setTextSize(2);
+  oled.setCursor(8, 10);
+  oled.print("HEISSER");
+  oled.setCursor(20, 30);
+  oled.print("DRAHT");
+
+  oled.setTextSize(1);
+  oled.setCursor(48, 52);
+  oled.print(VERSION_STR);
+
+  oled.display();
+}
+
+static void screenIdle() {
+  oled.clearDisplay();
+  oled.setTextColor(SSD1306_WHITE);
+
+  oled.setTextSize(2);
+  oled.setCursor(8, 5);
+  oled.print("HEISSER");
+  oled.setCursor(20, 23);
+  oled.print("DRAHT");
+
+  // Blinking "Druecke START"
+  if ((millis() / 500) % 2 == 0) {
+    oled.setTextSize(1);
+    oled.setCursor(12, 50);
+    oled.print("Druecke START");
+  }
+
+  oled.display();
+}
+
+static void screenCountdown() {
+  GameData& gd = gameGetData();
+  oled.clearDisplay();
+  oled.setTextColor(SSD1306_WHITE);
+
+  if (gd.countdownValue > 0) {
+    oled.setTextSize(4);
+    oled.setCursor(52, 16);
+    oled.print(gd.countdownValue);
+  } else {
+    oled.setTextSize(3);
+    oled.setCursor(36, 20);
+    oled.print("GO!");
+  }
+
+  oled.display();
+}
+
+static void screenPlaying() {
+  GameData& gd = gameGetData();
+  oled.clearDisplay();
+  oled.setTextColor(SSD1306_WHITE);
+
+  // Timer MM:SS
+  unsigned long remainMs = 0;
+  unsigned long totalMs = (unsigned long)GAME_DURATION_S * 1000UL;
+  if (gd.elapsedMs < totalMs) remainMs = totalMs - gd.elapsedMs;
+  uint8_t mins = (remainMs / 1000) / 60;
+  uint8_t secs = (remainMs / 1000) % 60;
+
+  oled.setTextSize(1);
+  oled.setCursor(0, 0);
+  oled.print("Zeit: ");
+  if (mins < 10) oled.print('0');
+  oled.print(mins);
+  oled.print(':');
+  if (secs < 10) oled.print('0');
+  oled.print(secs);
+
+  // Strikes
+  oled.setCursor(0, 14);
+  oled.print("Fehler: ");
+  oled.print(gd.strikes);
+  oled.print('/');
+  oled.print(MAX_STRIKES);
+
+  // Score (large)
+  oled.setTextSize(3);
+  oled.setCursor(10, 34);
+  oled.print(gd.score);
+
+  oled.display();
+}
+
+static void screenGameOver() {
+  GameData& gd = gameGetData();
+  oled.clearDisplay();
+  oled.setTextColor(SSD1306_WHITE);
+
+  oled.setTextSize(1);
+  oled.setCursor(20, 0);
+  oled.print(gd.won ? "GESCHAFFT!" : "GAME OVER!");
+
+  // Final score
+  oled.setTextSize(2);
+  oled.setCursor(10, 14);
+  oled.print("Score:");
+  oled.print(gd.score);
+
+  // Stats
+  oled.setTextSize(1);
+  unsigned long totalSec = gd.elapsedMs / 1000;
+  oled.setCursor(0, 36);
+  oled.print("Zeit: ");
+  oled.print(totalSec);
+  oled.print("s  Fehler: ");
+  oled.print(gd.strikes);
+
+  // Restart hint (blinking)
+  if ((millis() / 600) % 2 == 0) {
+    oled.setCursor(8, 54);
+    oled.print("START = Nochmal");
+  }
+
+  oled.display();
+}
+
+// ── Public API ──────────────────────────────────────────────────────
+
+void displayInit() {
+  Wire.begin(PIN_SDA, PIN_SCL);
+
+  if (!oled.begin(SSD1306_SWITCHCAPVCC, OLED_ADDR)) {
+    Serial.println("[OLED] Init FAILED");
+    return;
+  }
+
+  Serial.println("[OLED] Init OK");
+  screenSplash();
+  delay(1500);
+}
+
+void displayUpdate() {
+  unsigned long now = millis();
+  if (now - lastUpdateMs < DISPLAY_UPDATE_MS) return;
+  lastUpdateMs = now;
+
+  GameData& gd = gameGetData();
+  switch (gd.state) {
+    case STATE_IDLE:      screenIdle(); break;
+    case STATE_COUNTDOWN: screenCountdown(); break;
+    case STATE_PLAYING:   screenPlaying(); break;
+    case STATE_GAME_OVER: screenGameOver(); break;
+  }
+}