protocol/lufa/LUFA-git/Demos/Device/LowLevel/AudioInput/Descriptors.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2014.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2014  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 disclaims 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 /** \file
  32  *
  33  *  USB Device Descriptors, for library use when in USB device mode. Descriptors are special
  34  *  computer-readable structures which the host requests upon device enumeration, to determine
  35  *  the device's capabilities and functions.
  36  */
  37
  38 #include "Descriptors.h"
  39
  40 /** Device descriptor structure. This descriptor, located in FLASH memory, describes the overall
  41  *  device characteristics, including the supported USB version, control endpoint size and the
  42  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  43  *  process begins.
  44  */
  45 const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  46 {
  47         .Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
  48
  49         .USBSpecification       = VERSION_BCD(1,1,0),
  50         .Class                  = USB_CSCP_NoDeviceClass,
  51         .SubClass               = USB_CSCP_NoDeviceSubclass,
  52         .Protocol               = USB_CSCP_NoDeviceProtocol,
  53
  54         .Endpoint0Size          = FIXED_CONTROL_ENDPOINT_SIZE,
  55
  56         .VendorID               = 0x03EB,
  57         .ProductID              = 0x2047,
  58         .ReleaseNumber          = VERSION_BCD(0,0,2),
  59
  60         .ManufacturerStrIndex   = STRING_ID_Manufacturer,
  61         .ProductStrIndex        = STRING_ID_Product,
  62         .SerialNumStrIndex      = NO_DESCRIPTOR,
  63
  64         .NumberOfConfigurations = FIXED_NUM_CONFIGURATIONS
  65 };
  66
  67 /** Configuration descriptor structure. This descriptor, located in FLASH memory, describes the usage
  68  *  of the device in one of its supported configurations, including information about any device interfaces
  69  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  70  *  a configuration so that the host may correctly communicate with the USB device.
  71  */
  72 const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  73 {
  74         .Config =
  75                 {
  76                         .Header                   = {.Size = sizeof(USB_Descriptor_Configuration_Header_t), .Type = DTYPE_Configuration},
  77
  78                         .TotalConfigurationSize   = sizeof(USB_Descriptor_Configuration_t),
  79                         .TotalInterfaces          = 2,
  80
  81                         .ConfigurationNumber      = 1,
  82                         .ConfigurationStrIndex    = NO_DESCRIPTOR,
  83
  84                         .ConfigAttributes         = (USB_CONFIG_ATTR_RESERVED | USB_CONFIG_ATTR_SELFPOWERED),
  85
  86                         .MaxPowerConsumption      = USB_CONFIG_POWER_MA(100)
  87                 },
  88
  89         .Audio_ControlInterface =
  90                 {
  91                         .Header                   = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
  92
  93                         .InterfaceNumber          = INTERFACE_ID_AudioControl,
  94                         .AlternateSetting         = 0,
  95
  96                         .TotalEndpoints           = 0,
  97
  98                         .Class                    = AUDIO_CSCP_AudioClass,
  99                         .SubClass                 = AUDIO_CSCP_ControlSubclass,
 100                         .Protocol                 = AUDIO_CSCP_ControlProtocol,
 101
 102                         .InterfaceStrIndex        = NO_DESCRIPTOR
 103                 },
 104
 105         .Audio_ControlInterface_SPC =
 106                 {
 107                         .Header                   = {.Size = sizeof(USB_Audio_Descriptor_Interface_AC_t), .Type = DTYPE_CSInterface},
 108                         .Subtype                  = AUDIO_DSUBTYPE_CSInterface_Header,
 109
 110                         .ACSpecification          = VERSION_BCD(1,0,0),
 111                         .TotalLength              = (sizeof(USB_Audio_Descriptor_Interface_AC_t) +
 112                                                      sizeof(USB_Audio_Descriptor_InputTerminal_t) +
 113                                                      sizeof(USB_Audio_Descriptor_OutputTerminal_t)),
 114
 115                         .InCollection             = 1,
 116                         .InterfaceNumber          = INTERFACE_ID_AudioStream,
 117                 },
 118
 119         .Audio_InputTerminal =
 120                 {
 121                         .Header                   = {.Size = sizeof(USB_Audio_Descriptor_InputTerminal_t), .Type = DTYPE_CSInterface},
 122                         .Subtype                  = AUDIO_DSUBTYPE_CSInterface_InputTerminal,
 123
 124                         .TerminalID               = 0x01,
 125                         .TerminalType             = AUDIO_TERMINAL_IN_MIC,
 126                         .AssociatedOutputTerminal = 0x00,
 127
 128                         .TotalChannels            = 1,
 129                         .ChannelConfig            = 0,
 130
 131                         .ChannelStrIndex          = NO_DESCRIPTOR,
 132                         .TerminalStrIndex         = NO_DESCRIPTOR
 133                 },
 134
 135         .Audio_OutputTerminal =
 136                 {
 137                         .Header                   = {.Size = sizeof(USB_Audio_Descriptor_OutputTerminal_t), .Type = DTYPE_CSInterface},
 138                         .Subtype                  = AUDIO_DSUBTYPE_CSInterface_OutputTerminal,
 139
 140                         .TerminalID               = 0x02,
 141                         .TerminalType             = AUDIO_TERMINAL_STREAMING,
 142                         .AssociatedInputTerminal  = 0x00,
 143
 144                         .SourceID                 = 0x01,
 145
 146                         .TerminalStrIndex         = NO_DESCRIPTOR
 147                 },
 148
 149         .Audio_StreamInterface_Alt0 =
 150                 {
 151                         .Header                   = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
 152
 153                         .InterfaceNumber          = INTERFACE_ID_AudioStream,
 154                         .AlternateSetting         = 0,
 155
 156                         .TotalEndpoints           = 0,
 157
 158                         .Class                    = AUDIO_CSCP_AudioClass,
 159                         .SubClass                 = AUDIO_CSCP_AudioStreamingSubclass,
 160                         .Protocol                 = AUDIO_CSCP_StreamingProtocol,
 161
 162                         .InterfaceStrIndex        = NO_DESCRIPTOR
 163                 },
 164
 165         .Audio_StreamInterface_Alt1 =
 166                 {
 167                         .Header                   = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
 168
 169                         .InterfaceNumber          = INTERFACE_ID_AudioStream,
 170                         .AlternateSetting         = 1,
 171
 172                         .TotalEndpoints           = 1,
 173
 174                         .Class                    = AUDIO_CSCP_AudioClass,
 175                         .SubClass                 = AUDIO_CSCP_AudioStreamingSubclass,
 176                         .Protocol                 = AUDIO_CSCP_StreamingProtocol,
 177
 178                         .InterfaceStrIndex        = NO_DESCRIPTOR
 179                 },
 180
 181         .Audio_StreamInterface_SPC =
 182                 {
 183                         .Header                   = {.Size = sizeof(USB_Audio_Descriptor_Interface_AS_t), .Type = DTYPE_CSInterface},
 184                         .Subtype                  = AUDIO_DSUBTYPE_CSInterface_General,
 185
 186                         .TerminalLink             = 0x02,
 187
 188                         .FrameDelay               = 1,
 189                         .AudioFormat              = 0x0001
 190                 },
 191
 192         .Audio_AudioFormat =
 193                 {
 194                         .Header                   = {.Size = sizeof(USB_Audio_Descriptor_Format_t) +
 195                                                              sizeof(ConfigurationDescriptor.Audio_AudioFormatSampleRates),
 196                                                      .Type = DTYPE_CSInterface},
 197                         .Subtype                  = AUDIO_DSUBTYPE_CSInterface_FormatType,
 198
 199                         .FormatType               = 0x01,
 200                         .Channels                 = 0x01,
 201
 202                         .SubFrameSize             = 0x02,
 203                         .BitResolution            = 16,
 204
 205                         .TotalDiscreteSampleRates = (sizeof(ConfigurationDescriptor.Audio_AudioFormatSampleRates) / sizeof(USB_Audio_SampleFreq_t)),
 206                 },
 207
 208         .Audio_AudioFormatSampleRates =
 209                 {
 210                         AUDIO_SAMPLE_FREQ(8000),
 211                         AUDIO_SAMPLE_FREQ(11025),
 212                         AUDIO_SAMPLE_FREQ(22050),
 213                         AUDIO_SAMPLE_FREQ(44100),
 214                         AUDIO_SAMPLE_FREQ(48000),
 215                 },
 216
 217         .Audio_StreamEndpoint =
 218                 {
 219                         .Endpoint =
 220                                 {
 221                                         .Header              = {.Size = sizeof(USB_Audio_Descriptor_StreamEndpoint_Std_t), .Type = DTYPE_Endpoint},
 222
 223                                         .EndpointAddress     = AUDIO_STREAM_EPADDR,
 224                                         .Attributes          = (EP_TYPE_ISOCHRONOUS | ENDPOINT_ATTR_SYNC | ENDPOINT_USAGE_DATA),
 225                                         .EndpointSize        = AUDIO_STREAM_EPSIZE,
 226                                         .PollingIntervalMS   = 0x01
 227                                 },
 228
 229                         .Refresh                  = 0,
 230                         .SyncEndpointNumber       = 0
 231                 },
 232
 233         .Audio_StreamEndpoint_SPC =
 234                 {
 235                         .Header                   = {.Size = sizeof(USB_Audio_Descriptor_StreamEndpoint_Spc_t), .Type = DTYPE_CSEndpoint},
 236                         .Subtype                  = AUDIO_DSUBTYPE_CSEndpoint_General,
 237
 238                         .Attributes               = (AUDIO_EP_ACCEPTS_SMALL_PACKETS | AUDIO_EP_SAMPLE_FREQ_CONTROL),
 239
 240                         .LockDelayUnits           = 0x00,
 241                         .LockDelay                = 0x0000
 242                 }
 243 };
 244
 245 /** Language descriptor structure. This descriptor, located in FLASH memory, is returned when the host requests
 246  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
 247  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
 248  */
 249 const USB_Descriptor_String_t PROGMEM LanguageString = USB_STRING_DESCRIPTOR_ARRAY(LANGUAGE_ID_ENG);
 250
 251 /** Manufacturer descriptor string. This is a Unicode string containing the manufacturer's details in human readable
 252  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
 253  *  Descriptor.
 254  */
 255 const USB_Descriptor_String_t PROGMEM ManufacturerString = USB_STRING_DESCRIPTOR(L"Dean Camera");
 256
 257 /** Product descriptor string. This is a Unicode string containing the product's details in human readable form,
 258  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
 259  *  Descriptor.
 260  */
 261 const USB_Descriptor_String_t PROGMEM ProductString = USB_STRING_DESCRIPTOR(L"LUFA Audio In Demo");
 262
 263 /** This function is called by the library when in device mode, and must be overridden (see library "USB Descriptors"
 264  *  documentation) by the application code so that the address and size of a requested descriptor can be given
 265  *  to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
 266  *  is called so that the descriptor details can be passed back and the appropriate descriptor sent back to the
 267  *  USB host.
 268  */
 269 uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
 270                                     const uint8_t wIndex,
 271                                     const void** const DescriptorAddress)
 272 {
 273         const uint8_t  DescriptorType   = (wValue >> 8);
 274         const uint8_t  DescriptorNumber = (wValue & 0xFF);
 275
 276         const void* Address = NULL;
 277         uint16_t    Size    = NO_DESCRIPTOR;
 278
 279         switch (DescriptorType)
 280         {
 281                 case DTYPE_Device:
 282                         Address = &DeviceDescriptor;
 283                         Size    = sizeof(USB_Descriptor_Device_t);
 284                         break;
 285                 case DTYPE_Configuration:
 286                         Address = &ConfigurationDescriptor;
 287                         Size    = sizeof(USB_Descriptor_Configuration_t);
 288                         break;
 289                 case DTYPE_String:
 290                         switch (DescriptorNumber)
 291                         {
 292                                 case STRING_ID_Language:
 293                                         Address = &LanguageString;
 294                                         Size    = pgm_read_byte(&LanguageString.Header.Size);
 295                                         break;
 296                                 case STRING_ID_Manufacturer:
 297                                         Address = &ManufacturerString;
 298                                         Size    = pgm_read_byte(&ManufacturerString.Header.Size);
 299                                         break;
 300                                 case STRING_ID_Product:
 301                                         Address = &ProductString;
 302                                         Size    = pgm_read_byte(&ProductString.Header.Size);
 303                                         break;
 304                         }
 305
 306                         break;
 307         }
 308
 309         *DescriptorAddress = Address;
 310         return Size;
 311 }
 312