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[pub/USBasp.git] / LUFA / Drivers / USB / Class / Host / MIDI.c

diff --git a/LUFA/Drivers/USB/Class/Host/MIDI.c b/LUFA/Drivers/USB/Class/Host/MIDI.c
index 3cb0df6..a5ad4bf 100644 (file)
--- a/LUFA/Drivers/USB/Class/Host/MIDI.c
+++ b/LUFA/Drivers/USB/Class/Host/MIDI.c
@@ -122,6 +122,26 @@ static uint8_t DComp_MIDI_Host_NextMIDIStreamingDataEndpoint(void* const Current
        return DESCRIPTOR_SEARCH_NotFound;\r
 }\r
 \r
+uint8_t MIDI_Host_Flush(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo)\r
+{\r
+       if (USB_HostState != HOST_STATE_Configured)\r
+         return PIPE_RWSTREAM_DeviceDisconnected;\r
+       \r
+       uint8_t ErrorCode;\r
+\r
+       Pipe_SelectPipe(MIDIInterfaceInfo->Config.DataOUTPipeNumber);\r
+\r
+       if (Pipe_BytesInPipe())\r
+       {\r
+               Pipe_ClearOUT();\r
+\r
+               if ((ErrorCode = Pipe_WaitUntilReady()) != PIPE_READYWAIT_NoError)\r
+                 return ErrorCode;\r
+       }\r
+\r
+       return PIPE_READYWAIT_NoError;\r
+}\r
+\r
 uint8_t MIDI_Host_SendEventPacket(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo, MIDI_EventPacket_t* const Event)\r
 {\r
        if ((USB_HostState != HOST_STATE_Configured) || !(MIDIInterfaceInfo->State.IsActive))\r
@@ -136,7 +156,8 @@ uint8_t MIDI_Host_SendEventPacket(USB_ClassInfo_MIDI_Host_t* const MIDIInterface
                if ((ErrorCode = Pipe_Write_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK)) != PIPE_RWSTREAM_NoError)\r
                  return ErrorCode;\r
 \r
-               Pipe_ClearOUT();\r
+               if (!(Pipe_IsReadWriteAllowed()))\r
+                 Pipe_ClearOUT();\r
        }\r
        \r
        return PIPE_RWSTREAM_NoError;\r
@@ -153,7 +174,9 @@ bool MIDI_Host_ReceiveEventPacket(USB_ClassInfo_MIDI_Host_t* const MIDIInterface
          return false;\r
 \r
        Pipe_Read_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK);\r
-       Pipe_ClearIN();\r
+\r
+       if (!(Pipe_IsReadWriteAllowed()))\r
+         Pipe_ClearIN();\r
        \r
        return true;\r
 }\r