diff options
Diffstat (limited to 'LUFA/Drivers/USB/Class/Host')
-rw-r--r-- | LUFA/Drivers/USB/Class/Host/CDC.h | 10 | ||||
-rw-r--r-- | LUFA/Drivers/USB/Class/Host/MIDI.c | 27 | ||||
-rw-r--r-- | LUFA/Drivers/USB/Class/Host/MIDI.h | 11 |
3 files changed, 43 insertions, 5 deletions
diff --git a/LUFA/Drivers/USB/Class/Host/CDC.h b/LUFA/Drivers/USB/Class/Host/CDC.h index 20ee3209ed..dbc1f9e420 100644 --- a/LUFA/Drivers/USB/Class/Host/CDC.h +++ b/LUFA/Drivers/USB/Class/Host/CDC.h @@ -175,7 +175,9 @@ uint8_t CDC_Host_SendControlLineStateChange(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/** Sends a given string to the attached USB device, if connected. If a device is not connected when the function is called, the
- * string is discarded.
+ * string is discarded. Bytes will be queued for transmission to the device until either the pipe bank becomes full, or the
+ * \ref CDC_Host_Flush() function is called to flush the pending data to the host. This allows for multiple bytes to be
+ * packed into a single pipe packet, increasing data throughput.
*
* \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
* call will fail.
@@ -189,8 +191,10 @@ uint8_t CDC_Host_SendString(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, char* Data, const uint16_t Length)
ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
- /** Sends a given byte to the attached USB device, if connected. If a host is not connected when the function is called, the
- * byte is discarded.
+ /** Sends a given byte to the attached USB device, if connected. If a device is not connected when the function is called, the
+ * byte is discarded. Bytes will be queued for transmission to the device until either the pipe bank becomes full, or the
+ * \ref CDC_Host_Flush() function is called to flush the pending data to the host. This allows for multiple bytes to be
+ * packed into a single pipe packet, increasing data throughput.
*
* \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
* call will fail.
diff --git a/LUFA/Drivers/USB/Class/Host/MIDI.c b/LUFA/Drivers/USB/Class/Host/MIDI.c index 3cb0df6fb6..a5ad4bf2b3 100644 --- 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;
}
+uint8_t MIDI_Host_Flush(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo)
+{
+ if (USB_HostState != HOST_STATE_Configured)
+ return PIPE_RWSTREAM_DeviceDisconnected;
+
+ uint8_t ErrorCode;
+
+ Pipe_SelectPipe(MIDIInterfaceInfo->Config.DataOUTPipeNumber);
+
+ if (Pipe_BytesInPipe())
+ {
+ Pipe_ClearOUT();
+
+ if ((ErrorCode = Pipe_WaitUntilReady()) != PIPE_READYWAIT_NoError)
+ return ErrorCode;
+ }
+
+ return PIPE_READYWAIT_NoError;
+}
+
uint8_t MIDI_Host_SendEventPacket(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo, MIDI_EventPacket_t* const Event)
{
if ((USB_HostState != HOST_STATE_Configured) || !(MIDIInterfaceInfo->State.IsActive))
@@ -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)
return ErrorCode;
- Pipe_ClearOUT();
+ if (!(Pipe_IsReadWriteAllowed()))
+ Pipe_ClearOUT();
}
return PIPE_RWSTREAM_NoError;
@@ -153,7 +174,9 @@ bool MIDI_Host_ReceiveEventPacket(USB_ClassInfo_MIDI_Host_t* const MIDIInterface return false;
Pipe_Read_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK);
- Pipe_ClearIN();
+
+ if (!(Pipe_IsReadWriteAllowed()))
+ Pipe_ClearIN();
return true;
}
diff --git a/LUFA/Drivers/USB/Class/Host/MIDI.h b/LUFA/Drivers/USB/Class/Host/MIDI.h index b1971b16de..7b1cba3957 100644 --- a/LUFA/Drivers/USB/Class/Host/MIDI.h +++ b/LUFA/Drivers/USB/Class/Host/MIDI.h @@ -125,6 +125,17 @@ uint8_t MIDI_Host_SendEventPacket(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo,
MIDI_EventPacket_t* const Event) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
+ /** Flushes the MIDI send buffer, sending any queued MIDI events to the device. This should be called to override the
+ * \ref MIDI_Host_SendEventPacket() function's packing behaviour, to flush queued events. Events are queued into the
+ * pipe bank until either the pipe bank is full, or \ref MIDI_Host_Flush() is called. This allows for multiple MIDI
+ * events to be packed into a single pipe packet, increasing data throughput.
+ *
+ * \param[in,out] MIDIInterfaceInfo Pointer to a structure containing a MIDI Class configuration and state
+ *
+ * \return A value from the \ref Pipe_WaitUntilReady_ErrorCodes_t enum
+ */
+ uint8_t MIDI_Host_Flush(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo);
+
/** Receives a MIDI event packet from the device.
*
* \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
|