Add Gamepad implementation to Central HID Example

Author: OstlerDev

libraries/Bluefruit52Lib/examples/Central/central_hid/central_hid.ino

@@ -18,21 +18,33 @@
  */
 #include <bluefruit.h>
 
-// Polling or callback implementation
-#define POLLING       1
+/*
+ * Polling or callback implementation
+ * 0 = Request data using a poll
+ * 1 = Use callbacks 
+ */
+#define POLLING           0
+/*
+ * Device Type flag for use in the example
+ * Change this if you want to demo the Gamepad!
+ * 0 = Keyboard + Mouse
+ * 1 = Gamepad
+ */
+#define DEVICE_TYPE       0
 
 BLEClientHidAdafruit hid;
 
 // Last checked report, to detect if there is changes between reports
 hid_keyboard_report_t last_kbd_report = { 0 };
 hid_mouse_report_t last_mse_report = { 0 };
+hid_gamepad_report_t last_gpd_report = { 0 };
 
 void setup()
 {
   Serial.begin(115200);
 //  while ( !Serial ) delay(10);   // for nrf52840 with native usb
 
-  Serial.println("Bluefruit52 Central HID (Keyboard + Mouse) Example");
+  Serial.println("Bluefruit52 Central HID (Keyboard + Mouse + Gamepad) Example");
   Serial.println("--------------------------------------------------\n");
 
   // Initialize Bluefruit with maximum connections as Peripheral = 0, Central = 1
@@ -46,6 +58,7 @@ void setup()
 
   #if POLLING == 0  
   hid.setKeyboardReportCallback(keyboard_report_callback);
+  hid.setGamepadReportCallback(gamepad_report_callback);
   #endif
 
   // Increase Blink rate to different from PrPh advertising mode
@@ -69,7 +82,7 @@ void setup()
   Bluefruit.Scanner.restartOnDisconnect(true);
   Bluefruit.Scanner.setInterval(160, 80); // in unit of 0.625 ms
   Bluefruit.Scanner.filterService(hid);   // only report HID service
-  Bluefruit.Scanner.useActiveScan(false);
+  Bluefruit.Scanner.useActiveScan(true);
   Bluefruit.Scanner.start(0);             // 0 = Don't stop scanning after n seconds
 }
 
@@ -137,15 +150,21 @@ void connection_secured_callback(uint16_t conn_handle)
     Serial.printf("HID Flags  : 0x%02X\n", hidInfo[3]);
 
     // BLEClientHidAdafruit currently only supports Boot Protocol Mode
-    // for Keyboard and Mouse. Let's set the protocol mode on prph to Boot Mode
+    // for Keyboard and Mouse. If we are using a Keyboard + Mouse,
+    // let's set the protocol mode on prph to Boot Mode.
+#if DEVICE_TYPE == 0
     hid.setBootMode(true);
+#endif
 
     // Enable Keyboard report notification if present on prph
     if ( hid.keyboardPresent() ) hid.enableKeyboard();
 
     // Enable Mouse report notification if present on prph
     if ( hid.mousePresent() ) hid.enableMouse();
 
+    // Enable Gamepad report notification if present on prph
+    if ( hid.gamepadPresent() ) hid.enableGamepad();
+
     Serial.println("Ready to receive from peripheral");
   }
 }
@@ -169,15 +188,26 @@ void loop()
 #if POLLING == 1
   // nothing to do if hid not discovered
   if ( !hid.discovered() ) return;
-  
-  /*------------- Polling Keyboard  -------------*/
-  hid_keyboard_report_t kbd_report;
-
-  // Get latest report
-  hid.getKeyboardReport(&kbd_report);
 
-  processKeyboardReport(&kbd_report);
+  if ( hid.keyboardPresent() ) {
+    /*------------- Polling Keyboard  -------------*/
+    hid_keyboard_report_t kbd_report;
+  
+    // Get latest report
+    Serial.println("Get report from Keyboard");
+    hid.getKeyboardReport(&kbd_report);
+    processKeyboardReport(&kbd_report);
+  }
 
+  if ( hid.gamepadPresent() ) {
+    /*------------- Polling Gamepad  -------------*/
+    hid_gamepad_report_t gpd_report;
+  
+    // Get latest report
+    Serial.println("Get report from Gamepad");
+    hid.getGamepadReport(&gpd_report);
+    processGamepadReport(&gpd_report);
+  }
 
   // polling interval is 5 ms
   delay(5);
@@ -186,6 +216,24 @@ void loop()
 }
 
 
+void gamepad_report_callback(hid_gamepad_report_t* report)
+{
+  Serial.println("Recieved report from Gamepad");
+  processGamepadReport(report);
+}
+
+void processGamepadReport(hid_gamepad_report_t* report)
+{
+  memcpy(&last_gpd_report, report, sizeof(hid_gamepad_report_t));  
+  
+  Serial.print("Current Gamepad State: Buttons: ");
+  Serial.print(report->buttons, BIN);
+  Serial.print(" X: ");
+  Serial.print(report->x);
+  Serial.print(" Y: ");
+  Serial.println(report->y);
+}
+
 void keyboard_report_callback(hid_keyboard_report_t* report)
 {
   processKeyboardReport(report);