X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/47f6a35013b2c6a370e5dce29aa6da3a96844695..0da99447d3e88e83f9977501bee56af5c7aa56c0:/LUFA/Drivers/USB/Class/Host/MIDIClassHost.c

diff --git a/LUFA/Drivers/USB/Class/Host/MIDIClassHost.c b/LUFA/Drivers/USB/Class/Host/MIDIClassHost.c
index 0d33bfec4..b1abb68d7 100644
--- a/LUFA/Drivers/USB/Class/Host/MIDIClassHost.c
+++ b/LUFA/Drivers/USB/Class/Host/MIDIClassHost.c
@@ -156,15 +156,21 @@ uint8_t MIDI_Host_Flush(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo)
 	uint8_t ErrorCode;
 
 	Pipe_SelectPipe(MIDIInterfaceInfo->Config.DataOUTPipe.Address);
-
+	Pipe_Unfreeze();
+	
 	if (Pipe_BytesInPipe())
 	{
 		Pipe_ClearOUT();
 
 		if ((ErrorCode = Pipe_WaitUntilReady()) != PIPE_READYWAIT_NoError)
-		  return ErrorCode;
+		{
+			Pipe_Freeze();
+			return ErrorCode;
+		}
 	}
 
+	Pipe_Freeze();
+
 	return PIPE_READYWAIT_NoError;
 }
 
@@ -177,13 +183,19 @@ uint8_t MIDI_Host_SendEventPacket(USB_ClassInfo_MIDI_Host_t* const MIDIInterface
 	uint8_t ErrorCode;
 
 	Pipe_SelectPipe(MIDIInterfaceInfo->Config.DataOUTPipe.Address);
-
+	Pipe_Unfreeze();
+	
 	if ((ErrorCode = Pipe_Write_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NULL)) != PIPE_RWSTREAM_NoError)
-	  return ErrorCode;
+	{
+		Pipe_Freeze();
+		return ErrorCode;
+	}
 
 	if (!(Pipe_IsReadWriteAllowed()))
 	  Pipe_ClearOUT();
 
+	Pipe_Freeze();
+
 	return PIPE_RWSTREAM_NoError;
 }
 
@@ -192,18 +204,27 @@ bool MIDI_Host_ReceiveEventPacket(USB_ClassInfo_MIDI_Host_t* const MIDIInterface
 {
 	if ((USB_HostState != HOST_STATE_Configured) || !(MIDIInterfaceInfo->State.IsActive))
 	  return HOST_SENDCONTROL_DeviceDisconnected;
+	  
+	bool DataReady = false;
 
 	Pipe_SelectPipe(MIDIInterfaceInfo->Config.DataINPipe.Address);
+	Pipe_Unfreeze();
 
-	if (!(Pipe_IsReadWriteAllowed()))
-	  return false;
-
-	Pipe_Read_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NULL);
-
-	if (!(Pipe_IsReadWriteAllowed()))
-	  Pipe_ClearIN();
+	if (Pipe_IsINReceived())
+	{
+		if (Pipe_BytesInPipe())
+		{
+			Pipe_Read_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NULL);
+			DataReady = true;
+		}
 
-	return true;
+		if (!(Pipe_BytesInPipe()))
+		  Pipe_ClearIN();
+	}
+	
+	Pipe_Freeze();
+	
+	return DataReady;
 }
 
 #endif