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

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  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 "../../Core/USBMode.h"
  33
  34 #if defined(USB_CAN_BE_DEVICE)
  35
  36 #define  __INCLUDE_FROM_MIDI_DRIVER
  37 #define  __INCLUDE_FROM_MIDI_DEVICE_C
  38 #include "MIDI.h"
  39
  40 bool MIDI_Device_ConfigureEndpoints(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo)
  41 {
  42         memset(&MIDIInterfaceInfo->State, 0x00, sizeof(MIDIInterfaceInfo->State));
  43
  44         for (uint8_t EndpointNum = 1; EndpointNum < ENDPOINT_TOTAL_ENDPOINTS; EndpointNum++)
  45         {
  46                 uint16_t Size;
  47                 uint8_t  Type;
  48                 uint8_t  Direction;
  49                 bool     DoubleBanked;
  50
  51                 if (EndpointNum == MIDIInterfaceInfo->Config.DataINEndpointNumber)
  52                 {
  53                         Size         = MIDIInterfaceInfo->Config.DataINEndpointSize;
  54                         Direction    = ENDPOINT_DIR_IN;
  55                         Type         = EP_TYPE_BULK;
  56                         DoubleBanked = MIDIInterfaceInfo->Config.DataINEndpointDoubleBank;
  57                 }
  58                 else if (EndpointNum == MIDIInterfaceInfo->Config.DataOUTEndpointNumber)
  59                 {
  60                         Size         = MIDIInterfaceInfo->Config.DataOUTEndpointSize;
  61                         Direction    = ENDPOINT_DIR_OUT;
  62                         Type         = EP_TYPE_BULK;
  63                         DoubleBanked = MIDIInterfaceInfo->Config.DataOUTEndpointDoubleBank;
  64                 }
  65                 else
  66                 {
  67                         continue;
  68                 }
  69
  70                 if (!(Endpoint_ConfigureEndpoint(EndpointNum, Type, Direction, Size,
  71                                                  DoubleBanked ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
  72                 {
  73                         return false;
  74                 }
  75         }
  76
  77         return true;
  78 }
  79
  80 void MIDI_Device_USBTask(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo)
  81 {
  82         if (USB_DeviceState != DEVICE_STATE_Configured)
  83           return;
  84
  85         #if !defined(NO_CLASS_DRIVER_AUTOFLUSH)
  86         MIDI_Device_Flush(MIDIInterfaceInfo);
  87         #endif
  88 }
  89
  90 uint8_t MIDI_Device_SendEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo,
  91                                     const MIDI_EventPacket_t* const Event)
  92 {
  93         if (USB_DeviceState != DEVICE_STATE_Configured)
  94           return ENDPOINT_RWSTREAM_DeviceDisconnected;
  95
  96         uint8_t ErrorCode;
  97
  98         Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataINEndpointNumber);
  99
 100         if ((ErrorCode = Endpoint_Write_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NULL)) != ENDPOINT_RWSTREAM_NoError)
 101           return ErrorCode;
 102
 103         if (!(Endpoint_IsReadWriteAllowed()))
 104           Endpoint_ClearIN();
 105
 106         return ENDPOINT_RWSTREAM_NoError;
 107 }
 108
 109 uint8_t MIDI_Device_Flush(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo)
 110 {
 111         if (USB_DeviceState != DEVICE_STATE_Configured)
 112           return ENDPOINT_RWSTREAM_DeviceDisconnected;
 113
 114         uint8_t ErrorCode;
 115
 116         Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataINEndpointNumber);
 117
 118         if (Endpoint_BytesInEndpoint())
 119         {
 120                 Endpoint_ClearIN();
 121
 122                 if ((ErrorCode = Endpoint_WaitUntilReady()) != ENDPOINT_READYWAIT_NoError)
 123                   return ErrorCode;
 124         }
 125
 126         return ENDPOINT_READYWAIT_NoError;
 127 }
 128
 129 bool MIDI_Device_ReceiveEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo,
 130                                     MIDI_EventPacket_t* const Event)
 131 {
 132         if (USB_DeviceState != DEVICE_STATE_Configured)
 133           return false;
 134
 135         Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataOUTEndpointNumber);
 136
 137         if (!(Endpoint_IsReadWriteAllowed()))
 138           return false;
 139
 140         Endpoint_Read_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NULL);
 141
 142         if (!(Endpoint_IsReadWriteAllowed()))
 143           Endpoint_ClearOUT();
 144
 145         return true;
 146 }
 147
 148 #endif
 149