Vibration Feedback Macro Keyboard

#include <Arduino.h>
#include <Keypad.h>

// ─── Traffic Light Pins ───────────────────────────────────────────────────────
#define RED_PIN    16
#define YELLOW_PIN 17
#define GREEN_PIN  18

// ─── Keypad Pins ──────────────────────────────────────────────────────────────
#define R1_PIN 32
#define R2_PIN 33
#define R3_PIN 25
#define R4_PIN 26
#define C1_PIN 27
#define C2_PIN 14
#define C3_PIN 13
#define C4_PIN  4

// ─── Keypad Layout ────────────────────────────────────────────────────────────

// Hoisted type definitions
enum LightState { STATE_RED, STATE_YELLOW, STATE_GREEN, STATE_OFF };


// Forward declarations
void setLight(LightState state);
void printStatus(LightState state);
LightState autoStep(int step);

const byte ROWS = 4;
const byte COLS = 4;

char keys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};

byte rowPins[ROWS] = { R1_PIN, R2_PIN, R3_PIN, R4_PIN };
byte colPins[COLS] = { C1_PIN, C2_PIN, C3_PIN, C4_PIN };

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

// ─── Traffic Light State ──────────────────────────────────────────────────────

LightState currentState = STATE_OFF;

void setLight(LightState state) {
  digitalWrite(RED_PIN,    LOW);
  digitalWrite(YELLOW_PIN, LOW);
  digitalWrite(GREEN_PIN,  LOW);

  switch (state) {
    case STATE_RED:    digitalWrite(RED_PIN,    HIGH); break;
    case STATE_YELLOW: digitalWrite(YELLOW_PIN, HIGH); break;
    case STATE_GREEN:  digitalWrite(GREEN_PIN,  HIGH); break;
    case STATE_OFF:    /* all off */                   break;
  }
  currentState = state;
}

void printStatus(LightState state) {
  switch (state) {
    case STATE_RED:    Serial.println("[RED]    🔴  停止 / STOP");    break;
    case STATE_YELLOW: Serial.println("[YELLOW] 🟡  注意 / CAUTION"); break;
    case STATE_GREEN:  Serial.println("[GREEN]  🟢  通行 / GO");      break;
    case STATE_OFF:    Serial.println("[OFF]    ⚫  全灭 / ALL OFF");  break;
  }
}

// ─── Auto Cycle Variables ─────────────────────────────────────────────────────
bool autoCycle    = false;
unsigned long autoTimer = 0;
const unsigned long AUTO_INTERVAL = 3000; // 3 s per phase
int autoCycleStep = 0;                    // 0=RED 1=YELLOW 2=GREEN

LightState autoStep(int step) {
  switch (step % 3) {
    case 0: return STATE_RED;
    case 1: return STATE_YELLOW;
    case 2: return STATE_GREEN;
    default: return STATE_OFF;
  }
}

// ─── Setup ────────────────────────────────────────────────────────────────────
void setup() {
  Serial.begin(115200);
  delay(200);

  pinMode(RED_PIN,    OUTPUT);
  pinMode(YELLOW_PIN, OUTPUT);
  pinMode(GREEN_PIN,  OUTPUT);

  setLight(STATE_OFF);

  Serial.println("========================================");
  Serial.println("  🚦 Vibe Coding Keyboard  🎹");
  Serial.println("========================================");
  Serial.println("Keys:");
  Serial.println("  1 = 🔴 RED      2 = 🟡 YELLOW   3 = 🟢 GREEN");
  Serial.println("  0 / * = ⚫ OFF");
  Serial.println("  A = 🔄 Auto Cycle (3 s/phase)");
  Serial.println("  B = ⏹  Stop Auto Cycle");
  Serial.println("  # = Print current status");
  Serial.println("========================================");
}

// ─── Loop ─────────────────────────────────────────────────────────────────────
void loop() {
  // Auto-cycle tick
  if (autoCycle && millis() - autoTimer >= AUTO_INTERVAL) {
    autoTimer = millis();
    autoCycleStep++;
    LightState next = autoStep(autoCycleStep);
    setLight(next);
    Serial.print("[AUTO] → ");
    printStatus(next);
  }

  // Keypad scan
  char key = keypad.getKey();
  if (!key) return;

  Serial.print("Key pressed: ");
  Serial.println(key);

  switch (key) {
    case '1':
      autoCycle = false;
      setLight(STATE_RED);
      printStatus(STATE_RED);
      break;

    case '2':
      autoCycle = false;
      setLight(STATE_YELLOW);
      printStatus(STATE_YELLOW);
      break;

    case '3':
      autoCycle = false;
      setLight(STATE_GREEN);
      printStatus(STATE_GREEN);
      break;

    case '0':
    case '*':
      autoCycle = false;
      setLight(STATE_OFF);
      printStatus(STATE_OFF);
      break;

    case 'A':
      autoCycle    = true;
      autoCycleStep = 0;
      autoTimer    = millis() - AUTO_INTERVAL; // fire immediately
      Serial.println("[AUTO] Cycle started — RED→YELLOW→GREEN, 3 s each");
      break;

    case 'B':
      autoCycle = false;
      setLight(STATE_OFF);
      Serial.println("[AUTO] Cycle stopped.");
      break;

    case '#':
      Serial.print("Current: ");
      printStatus(currentState);
      break;

    default:
      // Other keys (4-9, C, D) do nothing — extend as you like
      break;
  }
}