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makefile

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    • Dean Camera's avatar
      39ac72f2
      Make a new general RingBuffer.h misc library driver, instead of the... · 39ac72f2
      Dean Camera authored
      Make a new general RingBuffer.h misc library driver, instead of the per-application LightweightRingBuff.h ring buffers. Change over projects to use the new driver.
      
      Add ORDERED_EP_CONFIG to the device Projects (only) that use only a single class driver, or where the endpoint ordering is fixed, to save on compiled binary size.
      
      Added new GCC_FORCE_POINTER_ACCESS() macro to correct GCC's mishandling of struct pointers.
      39ac72f2
      History
      Make a new general RingBuffer.h misc library driver, instead of the...
      Dean Camera authored
      Make a new general RingBuffer.h misc library driver, instead of the per-application LightweightRingBuff.h ring buffers. Change over projects to use the new driver.
      
      Add ORDERED_EP_CONFIG to the device Projects (only) that use only a single class driver, or where the endpoint ordering is fixed, to save on compiled binary size.
      
      Added new GCC_FORCE_POINTER_ACCESS() macro to correct GCC's mishandling of struct pointers.
    MIDIClassHost.c 6.83 KiB
    /*
                 LUFA Library
         Copyright (C) Dean Camera, 2012.
    
      dean [at] fourwalledcubicle [dot] com
               www.lufa-lib.org
    */
    
    /*
      Copyright 2012  Dean Camera (dean [at] fourwalledcubicle [dot] com)
    
      Permission to use, copy, modify, distribute, and sell this
      software and its documentation for any purpose is hereby granted
      without fee, provided that the above copyright notice appear in
      all copies and that both that the copyright notice and this
      permission notice and warranty disclaimer appear in supporting
      documentation, and that the name of the author not be used in
      advertising or publicity pertaining to distribution of the
      software without specific, written prior permission.
    
      The author disclaim all warranties with regard to this
      software, including all implied warranties of merchantability
      and fitness.  In no event shall the author be liable for any
      special, indirect or consequential damages or any damages
      whatsoever resulting from loss of use, data or profits, whether
      in an action of contract, negligence or other tortious action,
      arising out of or in connection with the use or performance of
      this software.
    */
    
    #define  __INCLUDE_FROM_USB_DRIVER
    #include "../../Core/USBMode.h"
    
    #if defined(USB_CAN_BE_HOST)
    
    #define  __INCLUDE_FROM_MIDI_DRIVER
    #define  __INCLUDE_FROM_MIDI_HOST_C
    #include "MIDIClassHost.h"
    
    uint8_t MIDI_Host_ConfigurePipes(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo,
                                     uint16_t ConfigDescriptorSize,
                                     void* ConfigDescriptorData)
    {
    	USB_Descriptor_Endpoint_t*  DataINEndpoint  = NULL;
    	USB_Descriptor_Endpoint_t*  DataOUTEndpoint = NULL;
    	USB_Descriptor_Interface_t* MIDIInterface   = NULL;
    
    	memset(&MIDIInterfaceInfo->State, 0x00, sizeof(MIDIInterfaceInfo->State));
    
    	if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
    	  return MIDI_ENUMERROR_InvalidConfigDescriptor;
    
    	while (!(DataINEndpoint) || !(DataOUTEndpoint))
    	{
    		if (!(MIDIInterface) ||
    		    USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
    		                              DCOMP_MIDI_Host_NextMIDIStreamingDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
    		{
    			if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
    			                              DCOMP_MIDI_Host_NextMIDIStreamingInterface) != DESCRIPTOR_SEARCH_COMP_Found)
    			{
    				return MIDI_ENUMERROR_NoCompatibleInterfaceFound;
    			}
    
    			MIDIInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);
    
    			DataINEndpoint  = NULL;
    			DataOUTEndpoint = NULL;
    
    			continue;
    		}
    
    		USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
    
    		if ((EndpointData->EndpointAddress & ENDPOINT_DIR_MASK) == ENDPOINT_DIR_IN)
    		  DataINEndpoint  = EndpointData;
    		else
    		  DataOUTEndpoint = EndpointData;
    	}
    
    	MIDIInterfaceInfo->Config.DataINPipe.Size  = le16_to_cpu(DataINEndpoint->EndpointSize);
    	MIDIInterfaceInfo->Config.DataINPipe.EndpointAddress = DataINEndpoint->EndpointAddress;
    	MIDIInterfaceInfo->Config.DataINPipe.Type  = EP_TYPE_BULK;
    	
    	MIDIInterfaceInfo->Config.DataOUTPipe.Size = le16_to_cpu(DataOUTEndpoint->EndpointSize);
    	MIDIInterfaceInfo->Config.DataOUTPipe.EndpointAddress = DataOUTEndpoint->EndpointAddress;
    	MIDIInterfaceInfo->Config.DataOUTPipe.Type = EP_TYPE_BULK;
    	
    	if (!(Pipe_ConfigurePipeTable(&MIDIInterfaceInfo->Config.DataINPipe, 1)))
    	  return false;
    	
    	if (!(Pipe_ConfigurePipeTable(&MIDIInterfaceInfo->Config.DataOUTPipe, 1)))
    	  return false;	
    
    	MIDIInterfaceInfo->State.InterfaceNumber = MIDIInterface->InterfaceNumber;
    	MIDIInterfaceInfo->State.IsActive = true;
    
    	return MIDI_ENUMERROR_NoError;
    }
    
    static uint8_t DCOMP_MIDI_Host_NextMIDIStreamingInterface(void* const CurrentDescriptor)
    {
    	USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
    
    	if (Header->Type == DTYPE_Interface)
    	{
    		USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);
    
    		if ((Interface->Class    == AUDIO_CSCP_AudioClass)            &&
    		    (Interface->SubClass == AUDIO_CSCP_MIDIStreamingSubclass) &&
    		    (Interface->Protocol == AUDIO_CSCP_StreamingProtocol))
    		{
    			return DESCRIPTOR_SEARCH_Found;
    		}
    	}
    
    	return DESCRIPTOR_SEARCH_NotFound;
    }
    
    static uint8_t DCOMP_MIDI_Host_NextMIDIStreamingDataEndpoint(void* const CurrentDescriptor)
    {
    	USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
    
    	if (Header->Type == DTYPE_Endpoint)
    	{
    		USB_Descriptor_Endpoint_t* Endpoint = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Endpoint_t);
    
    		uint8_t EndpointType = (Endpoint->Attributes & EP_TYPE_MASK);
    
    		if ((EndpointType == EP_TYPE_BULK) && !(Pipe_IsEndpointBound(Endpoint->EndpointAddress)))
    		  return DESCRIPTOR_SEARCH_Found;
    	}
    	else if (Header->Type == DTYPE_Interface)
    	{
    		return DESCRIPTOR_SEARCH_Fail;
    	}
    
    	return DESCRIPTOR_SEARCH_NotFound;
    }
    
    void MIDI_Host_USBTask(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo)
    {
    	if ((USB_HostState != HOST_STATE_Configured) || !(MIDIInterfaceInfo->State.IsActive))
    	  return;
    
    	#if !defined(NO_CLASS_DRIVER_AUTOFLUSH)
    	MIDI_Host_Flush(MIDIInterfaceInfo);
    	#endif
    }
    
    uint8_t MIDI_Host_Flush(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo)
    {
    	if ((USB_HostState != HOST_STATE_Configured) || !(MIDIInterfaceInfo->State.IsActive))
    	  return PIPE_RWSTREAM_DeviceDisconnected;
    
    	uint8_t ErrorCode;
    
    	Pipe_SelectPipe(MIDIInterfaceInfo->Config.DataOUTPipe.Address);
    
    	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))
    	  return HOST_SENDCONTROL_DeviceDisconnected;
    
    	uint8_t ErrorCode;
    
    	Pipe_SelectPipe(MIDIInterfaceInfo->Config.DataOUTPipe.Address);
    
    	if ((ErrorCode = Pipe_Write_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NULL)) != PIPE_RWSTREAM_NoError)
    	  return ErrorCode;
    
    	if (!(Pipe_IsReadWriteAllowed()))
    	  Pipe_ClearOUT();
    
    	return PIPE_RWSTREAM_NoError;
    }
    
    bool MIDI_Host_ReceiveEventPacket(USB_ClassInfo_MIDI_Host_t* const MIDIInterfaceInfo,
                                      MIDI_EventPacket_t* const Event)
    {
    	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_IsINReceived())
    	{
    		if (Pipe_BytesInPipe())
    		{
    			Pipe_Read_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NULL);
    			DataReady = true;
    		}
    
    		if (!(Pipe_BytesInPipe()))
    		  Pipe_ClearIN();
    	}
    	
    	Pipe_Freeze();
    	
    	return DataReady;
    }
    
    #endif