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