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 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         Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataINEndpointNumber);
  96
  97         if (Endpoint_IsReadWriteAllowed())
  98         {
  99                 uint8_t ErrorCode;
 100
 101                 if ((ErrorCode = Endpoint_Write_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK)) != ENDPOINT_RWSTREAM_NoError)
 102                   return ErrorCode;
 103
 104                 if (!(Endpoint_IsReadWriteAllowed()))
 105                   Endpoint_ClearIN();
 106         }
 107
 108         return ENDPOINT_RWSTREAM_NoError;
 109 }
 110
 111 uint8_t MIDI_Device_Flush(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo)
 112 {
 113         if (USB_DeviceState != DEVICE_STATE_Configured)
 114           return ENDPOINT_RWSTREAM_DeviceDisconnected;
 115
 116         uint8_t ErrorCode;
 117
 118         Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataINEndpointNumber);
 119
 120         if (Endpoint_BytesInEndpoint())
 121         {
 122                 Endpoint_ClearIN();
 123
 124                 if ((ErrorCode = Endpoint_WaitUntilReady()) != ENDPOINT_READYWAIT_NoError)
 125                   return ErrorCode;
 126         }
 127
 128         return ENDPOINT_READYWAIT_NoError;
 129 }
 130
 131 bool MIDI_Device_ReceiveEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo,
 132                                     MIDI_EventPacket_t* const Event)
 133 {
 134         if (USB_DeviceState != DEVICE_STATE_Configured)
 135           return false;
 136
 137         Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataOUTEndpointNumber);
 138
 139         if (!(Endpoint_IsReadWriteAllowed()))
 140           return false;
 141
 142         Endpoint_Read_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK);
 143
 144         if (!(Endpoint_IsReadWriteAllowed()))
 145           Endpoint_ClearOUT();
 146
 147         return true;
 148 }
 149
 150 #endif
 151