Add a new RFCOMM_ChannelOpened() callback event for when logical RFCOMM channels are opened in the BluetoothHost demo. Make the demo echo back sent characters to the remote device.

Demos/Host/Incomplete/BluetoothHost/BluetoothEvents.c

@@ -37,11 +37,15 @@
 
 #include "BluetoothEvents.h"
 
-/** Bluetooth RFCOMM channel structure - used to send and receive RFCOMM data between the local and remote
- *  device once a RFCOMM channel has been opened.
+/** Pointer to the opened Bluetooth ACL channel structure for RFCOMM, used to send and receive data between the
+ *  local and remote device once a RFCOMM channel has been opened.
  */
 Bluetooth_Channel_t* RFCOMMChannel = NULL;
 
+/** Pointer to the opened RFCOMM logical channel between local and remote device, once a RFCOMM ACL channel has been
+ *  negotiated and a logical RFCOMM channel requested.
+ */
+RFCOMM_Channel_t* SerialPortChannel = NULL;
 
 /** Bluetooth stack callback event for when the Bluetooth stack has fully initialized using the attached
  *  Bluetooth dongle.
@@ -155,15 +159,24 @@ void Bluetooth_PacketReceived(void* Data, uint16_t DataLen, Bluetooth_Channel_t*
 	}
 }
 
+void RFCOMM_ChannelOpened(RFCOMM_Channel_t* const Channel)
+{
+	/* Save the serial port RFCOMM logical channel for later use */
+	SerialPortChannel = Channel;
+}
+
 /** RFCOMM layer callback for when a packet is received on an open RFCOMM channel.
  *
- *  \param[in] RFCOMMChannel  RFCOMM channel that the data was directed to
+ *  \param[in] Channel  RFCOMM channel that the data was directed to
  *  \param[in] DataLen  Length of the received data, in bytes
  *  \param[in] Data     Pointer to a buffer where the received data is stored
  */
-void RFCOMM_DataReceived(RFCOMM_Channel_t* const RFCOMMChannel, uint16_t DataLen, const uint8_t* Data)
+void RFCOMM_DataReceived(RFCOMM_Channel_t* const Channel, uint16_t DataLen, const uint8_t* Data)
 {
 	/* Write the received bytes to the serial port */
 	for (uint8_t i = 0; i < DataLen; i++)
 	  putchar(Data[i]);
+	
+	/* Echo the data back to the sending device */
+	RFCOMM_SendData(DataLen, Data, Channel, RFCOMMChannel);
 }

Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c

@@ -94,6 +94,7 @@ void RFCOMM_ServiceChannels(Bluetooth_Channel_t* const BluetoothChannel)
 			                                  (RFCOMM_CONFIG_REMOTESIGNALS | RFCOMM_CONFIG_LOCALSIGNALS))
 			{
 				RFCOMMChannel->State = RFCOMM_Channel_Open;
+				RFCOMM_ChannelOpened(RFCOMMChannel);
 			}
 		}
 	}
@@ -129,11 +130,6 @@ void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
 	}
 }
 
-RFCOMM_Channel_t* RFCOMM_OpenChannel(Bluetooth_Channel_t* const BluetoothChannel)
-{
-	return NULL;
-}
-
 void RFCOMM_SendChannelSignals(const RFCOMM_Channel_t* const RFCOMMChannel, Bluetooth_Channel_t* const BluetoothChannel)
 {
 	BT_RFCOMM_DEBUG(1, ">> MSC Command");
@@ -156,6 +152,19 @@ void RFCOMM_SendChannelSignals(const RFCOMM_Channel_t* const RFCOMMChannel, Blue
 	RFCOMM_SendFrame(RFCOMM_CONTROL_DLCI, true, RFCOMM_Frame_UIH, sizeof(MSCommand), &MSCommand, BluetoothChannel);	
 }
 
+void RFCOMM_SendData(const uint16_t DataLen, const uint8_t* Data, const RFCOMM_Channel_t* const RFCOMMChannel,
+                     Bluetooth_Channel_t* const BluetoothChannel)
+{
+	if (RFCOMMChannel->State != RFCOMM_Channel_Open)
+	  return;
+	  
+	BT_RFCOMM_DEBUG(1, ">> UIH Frame");
+	BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", RFCOMMChannel->DLCI);
+
+	/* Send the MSC command to the remote device */
+	RFCOMM_SendFrame(RFCOMMChannel->DLCI, false, RFCOMM_Frame_UIH, DataLen, Data, BluetoothChannel);		
+}
+
 RFCOMM_Channel_t* RFCOMM_GetFreeChannelEntry(const uint8_t DLCI)
 {
 	/* Find a free entry in the RFCOMM channel multiplexer state array */

Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.h

@@ -106,8 +106,12 @@
 		
 		void              RFCOMM_SendChannelSignals(const RFCOMM_Channel_t* const RFCOMMChannel,
 		                                            Bluetooth_Channel_t* const BluetoothChannel);
+		void              RFCOMM_SendData(const uint16_t DataLen, const uint8_t* Data,
+		                                  const RFCOMM_Channel_t* const RFCOMMChannel,
+		                                  Bluetooth_Channel_t* const BluetoothChannel);
 
-		void              RFCOMM_DataReceived(RFCOMM_Channel_t* const RFCOMMChannel, uint16_t DataLen, const uint8_t* Data);
+		void              RFCOMM_ChannelOpened(RFCOMM_Channel_t* const Channel);
+		void              RFCOMM_DataReceived(RFCOMM_Channel_t* const Channel, uint16_t DataLen, const uint8_t* Data);
 
 		RFCOMM_Channel_t* RFCOMM_GetFreeChannelEntry(const uint8_t DLCI);
 		RFCOMM_Channel_t* RFCOMM_GetChannelData(const uint8_t DLCI);

LUFA/ManPages/LUFAPoweredProjects.txt

@@ -38,6 +38,7 @@
  *  - Arcade Controller: http://fletchtronics.net/arcade-controller-made-petunia
  *  - AVR USB Modem, a 3G Wireless Modem host: http://code.google.com/p/avrusbmodem/
  *  - Bicycle POV: http://www.code.google.com/p/bicycleledpov/
+ *  - BusNinja, an AVR clone of the popular BusPirate project: http://blog.hodgepig.org/busninja/
  *  - CAMTRIG, a remote Camera Trigger device: http://code.astraw.com/projects/motmot/camtrig
  *  - CD Driver Emulator Dongle for ISO Files: http://cdemu.blogspot.com/
  *  - ClockTamer, a configurable clock generator: http://code.google.com/p/clock-tamer/