added hardware

arduino/sketch.ino

@@ -0,0 +1,178 @@
+#include <bluefruit.h>
+#include <bluefruit.h>
+
+// Pin definitions for the 9 buttons
+const int buttonPins[] = {1, 2, 3, 4, 5, 6, 8, 9, 10};
+const int numButtons = sizeof(buttonPins) / sizeof(buttonPins[0]);
+
+// Button state tracking
+struct Button {
+  int pin;
+  bool lastState;
+  unsigned long lastDebounceTime;
+  unsigned long pressTime;
+  int clickCount;
+  bool isPressed;
+  bool longPressHandled;
+};
+
+Button buttons[numButtons];
+
+// Debounce and timing constants
+const unsigned long debounceDelay = 50;
+const unsigned long doubleClickDelay = 400;
+const unsigned long longPressDelay = 1000;
+
+// BLE Keyboard object
+BLEDis bledis;
+BLEHidAdafruit blehid;
+
+// Character mapping for each event
+// 9 buttons * 3 events/button = 27 characters
+const char eventChars[numButtons][3] = {
+  {'a', 'b', 'c'}, // Button D1: single, double, long
+  {'d', 'e', 'f'}, // Button D2: single, double, long
+  {'g', 'h', 'i'}, // Button D3: single, double, long
+  {'j', 'k', 'l'}, // Button D4: single, double, long
+  {'m', 'n', 'o'}, // Button D5: single, double, long
+  {'p', 'q', 'r'}, // Button D6: single, double, long
+  {'s', 't', 'u'}, // Button D8: single, double, long
+  {'v', 'w', 'x'}, // Button D9: single, double, long
+  {'y', 'z', '1'}  // Button D10: single, double, long
+};
+
+void setup() {
+  Serial.begin(115200);
+  //while ( !Serial ) delay(10); // Wait for serial port to connect.
+
+  Serial.println("Nexus Game Controller Starting...");
+
+  // Initialize buttons
+  for (int i = 0; i < numButtons; i++) {
+    buttons[i].pin = buttonPins[i];
+    pinMode(buttons[i].pin, INPUT_PULLUP);
+    buttons[i].lastState = HIGH;
+    buttons[i].lastDebounceTime = 0;
+    buttons[i].pressTime = 0;
+    buttons[i].clickCount = 0;
+    buttons[i].isPressed = false;
+    buttons[i].longPressHandled = false;
+  }
+
+  // Setup Bluetooth
+  Bluefruit.begin();
+  Bluefruit.setName("Nexus Game Controller");
+  Bluefruit.setTxPower(4);
+
+  // Configure and start BLE services
+  bledis.setManufacturer("Seeed Studio");
+  bledis.setModel("XIAO nRF52840 Sense");
+  bledis.begin();
+
+  blehid.begin();
+
+  // Start advertising
+  Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);
+  Bluefruit.Advertising.addTxPower();
+  Bluefruit.Advertising.addAppearance(BLE_APPEARANCE_HID_KEYBOARD);
+  Bluefruit.Advertising.addService(blehid);
+  Bluefruit.Advertising.addName();
+  
+  Bluefruit.Advertising.restartOnDisconnect(true);
+  Bluefruit.Advertising.setInterval(32, 244); // in unit of 0.625 ms
+  Bluefruit.Advertising.setFastTimeout(30); // number of seconds in fast advertising mode
+  Bluefruit.Advertising.start(0); // 0 = Don't stop advertising after n seconds
+
+  Serial.println("Advertising...");
+
+  // Set up connection/disconnection callbacks
+  Bluefruit.Periph.setConnectCallback(connect_callback);
+  Bluefruit.Periph.setDisconnectCallback(disconnect_callback);
+}
+
+void connect_callback(uint16_t conn_handle) {
+  (void) conn_handle;
+  Serial.println("Bluetooth connected");
+}
+
+void disconnect_callback(uint16_t conn_handle, uint8_t reason) {
+  (void) conn_handle;
+  (void) reason;
+  Serial.println("Bluetooth disconnected");
+}
+
+
+void loop() {
+  for (int i = 0; i < numButtons; i++) {
+    handleButton(&buttons[i], i);
+  }
+}
+
+void handleButton(Button* b, int buttonIndex) {
+  bool reading = digitalRead(b->pin);
+
+  // Debounce logic
+  if (reading != b->lastState) {
+    b->lastDebounceTime = millis();
+  }
+
+  if ((millis() - b->lastDebounceTime) > debounceDelay) {
+    // If the button state has been stable
+    if (reading == LOW && !b->isPressed) { // Button just pressed
+      b->isPressed = true;
+      b->pressTime = millis();
+      b->clickCount++;
+      b->longPressHandled = false;
+    } else if (reading == HIGH && b->isPressed) { // Button just released
+      b->isPressed = false;
+      if (!b->longPressHandled) {
+        // It's a click, but we need to wait for a potential double click
+      } else {
+        // This was a long press, so we do nothing on release
+        b->longPressHandled = false; // Reset for next time
+      }
+    }
+  }
+
+  // Check for long press
+  if (b->isPressed && !b->longPressHandled && (millis() - b->pressTime > longPressDelay)) {
+    triggerEvent(buttonIndex, 2); // Long Press
+    b->longPressHandled = true;
+    b->clickCount = 0; // Reset click count after a long press
+  }
+
+  // Check for single/double click timeout
+  if (b->clickCount > 0 && !b->isPressed && (millis() - b->pressTime > doubleClickDelay)) {
+    if (!b->longPressHandled) {
+      if (b->clickCount == 1) {
+        triggerEvent(buttonIndex, 0); // Single Click
+      } else if (b->clickCount == 2) {
+        triggerEvent(buttonIndex, 1); // Double Click
+      }
+    }
+    b->clickCount = 0;
+  }
+
+  b->lastState = reading;
+}
+
+void triggerEvent(int buttonIndex, int eventType) {
+  // eventType: 0 = single, 1 = double, 2 = long
+  char key = eventChars[buttonIndex][eventType];
+  
+  const char* eventStr[] = {"single click", "double click", "long press"};
+
+  Serial.print("Button D");
+  Serial.print(buttonPins[buttonIndex]);
+  Serial.print(" triggered ");
+  Serial.print(eventStr[eventType]);
+  Serial.print(" event. Character '");
+  Serial.print(key);
+  Serial.println("' has been sent.");
+
+  if (Bluefruit.connected()) {
+    blehid.keyPress(key);
+    delay(10); // a small delay to prevent flooding
+    blehid.keyRelease();
+  }
+}