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 #define  __INCLUDE_FROM_MIDI_DEVICE_C
  37 #include "MIDI.h"
  38
  39 bool MIDI_Device_ConfigureEndpoints(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo)
  40 {
  41         memset(&MIDIInterfaceInfo->State, 0x00, sizeof(MIDIInterfaceInfo->State));
  42
  43         for (uint8_t EndpointNum = 1; EndpointNum < ENDPOINT_TOTAL_ENDPOINTS; EndpointNum++)
  44         {
  45                 uint16_t Size;
  46                 uint8_t  Type;
  47                 uint8_t  Direction;
  48                 bool     DoubleBanked;
  49
  50                 if (EndpointNum == MIDIInterfaceInfo->Config.DataINEndpointNumber)
  51                 {
  52                         Size         = MIDIInterfaceInfo->Config.DataINEndpointSize;
  53                         Direction    = ENDPOINT_DIR_IN;
  54                         Type         = EP_TYPE_BULK;
  55                         DoubleBanked = MIDIInterfaceInfo->Config.DataINEndpointDoubleBank;
  56                 }
  57                 else if (EndpointNum == MIDIInterfaceInfo->Config.DataOUTEndpointNumber)
  58                 {
  59                         Size         = MIDIInterfaceInfo->Config.DataOUTEndpointSize;
  60                         Direction    = ENDPOINT_DIR_OUT;
  61                         Type         = EP_TYPE_BULK;
  62                         DoubleBanked = MIDIInterfaceInfo->Config.DataOUTEndpointDoubleBank;
  63                 }
  64                 else
  65                 {
  66                         continue;
  67                 }
  68
  69                 if (!(Endpoint_ConfigureEndpoint(EndpointNum, Type, Direction, Size,
  70                                                                                  DoubleBanked ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
  71                 {
  72                         return false;
  73                 }
  74         }
  75
  76         return true;
  77 }
  78
  79 uint8_t MIDI_Device_SendEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo,
  80                                     const MIDI_EventPacket_t* const Event)
  81 {
  82         if (USB_DeviceState != DEVICE_STATE_Configured)
  83           return ENDPOINT_RWSTREAM_DeviceDisconnected;
  84
  85         Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataINEndpointNumber);
  86
  87         if (Endpoint_IsReadWriteAllowed())
  88         {
  89                 uint8_t ErrorCode;
  90
  91                 if ((ErrorCode = Endpoint_Write_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK)) != ENDPOINT_RWSTREAM_NoError)
  92                   return ErrorCode;
  93
  94                 if (!(Endpoint_IsReadWriteAllowed()))
  95                   Endpoint_ClearIN();
  96         }
  97
  98         return ENDPOINT_RWSTREAM_NoError;
  99 }
 100
 101 uint8_t MIDI_Device_Flush(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo)
 102 {
 103         if (USB_DeviceState != DEVICE_STATE_Configured)
 104           return ENDPOINT_RWSTREAM_DeviceDisconnected;
 105
 106         uint8_t ErrorCode;
 107
 108         Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataINEndpointNumber);
 109
 110         if (Endpoint_BytesInEndpoint())
 111         {
 112                 Endpoint_ClearIN();
 113
 114                 if ((ErrorCode = Endpoint_WaitUntilReady()) != ENDPOINT_READYWAIT_NoError)
 115                   return ErrorCode;
 116         }
 117
 118         return ENDPOINT_READYWAIT_NoError;
 119 }
 120
 121 bool MIDI_Device_ReceiveEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo,
 122                                     MIDI_EventPacket_t* const Event)
 123 {
 124         if (USB_DeviceState != DEVICE_STATE_Configured)
 125           return false;
 126
 127         Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataOUTEndpointNumber);
 128
 129         if (!(Endpoint_IsReadWriteAllowed()))
 130           return false;
 131
 132         Endpoint_Read_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK);
 133
 134         if (!(Endpoint_IsReadWriteAllowed()))
 135           Endpoint_ClearOUT();
 136
 137         return true;
 138 }
 139
 140 #endif
 141