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 "../../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 void MIDI_Device_USBTask(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo)
  80 {
  81         if (USB_DeviceState != DEVICE_STATE_Configured)
  82           return;
  83
  84         #if !defined(NO_CLASS_DRIVER_AUTOFLUSH)
  85         MIDI_Device_Flush(MIDIInterfaceInfo);
  86         #endif
  87 }
  88
  89 uint8_t MIDI_Device_SendEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo,
  90                                     const MIDI_EventPacket_t* const Event)
  91 {
  92         if (USB_DeviceState != DEVICE_STATE_Configured)
  93           return ENDPOINT_RWSTREAM_DeviceDisconnected;
  94
  95         uint8_t ErrorCode;
  96
  97         Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataINEndpointNumber);
  98
  99         if ((ErrorCode = Endpoint_Write_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK)) != ENDPOINT_RWSTREAM_NoError)
 100           return ErrorCode;
 101
 102         if (!(Endpoint_IsReadWriteAllowed()))
 103           Endpoint_ClearIN();
 104
 105         return ENDPOINT_RWSTREAM_NoError;
 106 }
 107
 108 uint8_t MIDI_Device_Flush(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo)
 109 {
 110         if (USB_DeviceState != DEVICE_STATE_Configured)
 111           return ENDPOINT_RWSTREAM_DeviceDisconnected;
 112
 113         uint8_t ErrorCode;
 114
 115         Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataINEndpointNumber);
 116
 117         if (Endpoint_BytesInEndpoint())
 118         {
 119                 Endpoint_ClearIN();
 120
 121                 if ((ErrorCode = Endpoint_WaitUntilReady()) != ENDPOINT_READYWAIT_NoError)
 122                   return ErrorCode;
 123         }
 124
 125         return ENDPOINT_READYWAIT_NoError;
 126 }
 127
 128 bool MIDI_Device_ReceiveEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo,
 129                                     MIDI_EventPacket_t* const Event)
 130 {
 131         if (USB_DeviceState != DEVICE_STATE_Configured)
 132           return false;
 133
 134         Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataOUTEndpointNumber);
 135
 136         if (!(Endpoint_IsReadWriteAllowed()))
 137           return false;
 138
 139         Endpoint_Read_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK);
 140
 141         if (!(Endpoint_IsReadWriteAllowed()))
 142           Endpoint_ClearOUT();
 143
 144         return true;
 145 }
 146
 147 #endif
 148