LUFA/Drivers/USB/Class/Device/MIDI.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 #define  __INCLUDE_FROM_USB_DRIVER
  32 #include "../../HighLevel/USBMode.h"
  33 #if defined(USB_CAN_BE_DEVICE)
  34
  35 #define  __INCLUDE_FROM_MIDI_DRIVER
  36 #include "MIDI.h"
  37
  38 bool MIDI_Device_ConfigureEndpoints(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo)
  39 {
  40         memset(&MIDIInterfaceInfo->State, 0x00, sizeof(MIDIInterfaceInfo->State));
  41
  42         if (MIDIInterfaceInfo->Config.DataINEndpointNumber)
  43         {
  44                 if (!(Endpoint_ConfigureEndpoint(MIDIInterfaceInfo->Config.DataINEndpointNumber, EP_TYPE_BULK,
  45                                                                                  ENDPOINT_DIR_IN, MIDIInterfaceInfo->Config.DataINEndpointSize,
  46                                                                                  MIDIInterfaceInfo->Config.DataINEndpointDoubleBank ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
  47                 {
  48                         return false;
  49                 }
  50         }
  51
  52         if (MIDIInterfaceInfo->Config.DataOUTEndpointNumber)
  53         {
  54                 if (!(Endpoint_ConfigureEndpoint(MIDIInterfaceInfo->Config.DataOUTEndpointNumber, EP_TYPE_BULK,
  55                                                                                  ENDPOINT_DIR_OUT, MIDIInterfaceInfo->Config.DataOUTEndpointSize,
  56                                                                                  MIDIInterfaceInfo->Config.DataOUTEndpointDoubleBank ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
  57                 {
  58                         return false;
  59                 }
  60         }
  61
  62         return true;
  63 }
  64
  65 uint8_t MIDI_Device_SendEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo,
  66                                     const MIDI_EventPacket_t* const Event)
  67 {
  68         if (USB_DeviceState != DEVICE_STATE_Configured)
  69           return ENDPOINT_RWSTREAM_DeviceDisconnected;
  70
  71         Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataINEndpointNumber);
  72
  73         if (Endpoint_IsReadWriteAllowed())
  74         {
  75                 uint8_t ErrorCode;
  76
  77                 if ((ErrorCode = Endpoint_Write_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK)) != ENDPOINT_RWSTREAM_NoError)
  78                   return ErrorCode;
  79
  80                 if (!(Endpoint_IsReadWriteAllowed()))
  81                   Endpoint_ClearIN();
  82         }
  83
  84         return ENDPOINT_RWSTREAM_NoError;
  85 }
  86
  87 uint8_t MIDI_Device_Flush(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo)
  88 {
  89         if (USB_DeviceState != DEVICE_STATE_Configured)
  90           return ENDPOINT_RWSTREAM_DeviceDisconnected;
  91
  92         uint8_t ErrorCode;
  93
  94         Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataINEndpointNumber);
  95
  96         if (Endpoint_BytesInEndpoint())
  97         {
  98                 Endpoint_ClearIN();
  99
 100                 if ((ErrorCode = Endpoint_WaitUntilReady()) != ENDPOINT_READYWAIT_NoError)
 101                   return ErrorCode;
 102         }
 103
 104         return ENDPOINT_READYWAIT_NoError;
 105 }
 106
 107 bool MIDI_Device_ReceiveEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo,
 108                                     MIDI_EventPacket_t* const Event)
 109 {
 110         if (USB_DeviceState != DEVICE_STATE_Configured)
 111           return false;
 112
 113         Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataOUTEndpointNumber);
 114
 115         if (!(Endpoint_IsReadWriteAllowed()))
 116           return false;
 117
 118         Endpoint_Read_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK);
 119
 120         if (!(Endpoint_IsReadWriteAllowed()))
 121           Endpoint_ClearOUT();
 122
 123         return true;
 124 }
 125
 126 #endif