Projects/LEDNotifier/Descriptors.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2017.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2017  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
  41 /** Device descriptor structure. This descriptor, located in FLASH memory, describes the overall
  42  *  device characteristics, including the supported USB version, control endpoint size and the
  43  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  44  *  process begins.
  45  */
  46 const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  47 {
  48         .Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
  49
  50         .USBSpecification       = VERSION_BCD(1,1,0),
  51         .Class                  = CDC_CSCP_CDCClass,
  52         .SubClass               = CDC_CSCP_NoSpecificSubclass,
  53         .Protocol               = CDC_CSCP_NoSpecificProtocol,
  54
  55         .Endpoint0Size          = FIXED_CONTROL_ENDPOINT_SIZE,
  56
  57         .VendorID               = 0x03EB,
  58         .ProductID              = 0x2044,
  59         .ReleaseNumber          = VERSION_BCD(0,0,1),
  60
  61         .ManufacturerStrIndex   = STRING_ID_Manufacturer,
  62         .ProductStrIndex        = STRING_ID_Product,
  63         .SerialNumStrIndex      = USE_INTERNAL_SERIAL,
  64
  65         .NumberOfConfigurations = FIXED_NUM_CONFIGURATIONS
  66 };
  67
  68 /** Configuration descriptor structure. This descriptor, located in FLASH memory, describes the usage
  69  *  of the device in one of its supported configurations, including information about any device interfaces
  70  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  71  *  a configuration so that the host may correctly communicate with the USB device.
  72  */
  73 const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  74 {
  75         .Config =
  76                 {
  77                         .Header                 = {.Size = sizeof(USB_Descriptor_Configuration_Header_t), .Type = DTYPE_Configuration},
  78
  79                         .TotalConfigurationSize = sizeof(USB_Descriptor_Configuration_t),
  80                         .TotalInterfaces        = 2,
  81
  82                         .ConfigurationNumber    = 1,
  83                         .ConfigurationStrIndex  = NO_DESCRIPTOR,
  84
  85                         .ConfigAttributes       = (USB_CONFIG_ATTR_RESERVED | USB_CONFIG_ATTR_SELFPOWERED),
  86
  87                         .MaxPowerConsumption    = USB_CONFIG_POWER_MA(100)
  88                 },
  89
  90         .CDC_CCI_Interface =
  91                 {
  92                         .Header                 = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
  93
  94                         .InterfaceNumber        = INTERFACE_ID_CDC_CCI,
  95                         .AlternateSetting       = 0,
  96
  97                         .TotalEndpoints         = 1,
  98
  99                         .Class                  = CDC_CSCP_CDCClass,
 100                         .SubClass               = CDC_CSCP_ACMSubclass,
 101                         .Protocol               = CDC_CSCP_ATCommandProtocol,
 102
 103                         .InterfaceStrIndex      = NO_DESCRIPTOR
 104                 },
 105
 106         .CDC_Functional_Header =
 107                 {
 108                         .Header                 = {.Size = sizeof(USB_CDC_Descriptor_FunctionalHeader_t), .Type = DTYPE_CSInterface},
 109                         .Subtype                = CDC_DSUBTYPE_CSInterface_Header,
 110
 111                         .CDCSpecification       = VERSION_BCD(1,1,0),
 112                 },
 113
 114         .CDC_Functional_ACM =
 115                 {
 116                         .Header                 = {.Size = sizeof(USB_CDC_Descriptor_FunctionalACM_t), .Type = DTYPE_CSInterface},
 117                         .Subtype                = CDC_DSUBTYPE_CSInterface_ACM,
 118
 119                         .Capabilities           = 0x06,
 120                 },
 121
 122         .CDC_Functional_Union =
 123                 {
 124                         .Header                 = {.Size = sizeof(USB_CDC_Descriptor_FunctionalUnion_t), .Type = DTYPE_CSInterface},
 125                         .Subtype                = CDC_DSUBTYPE_CSInterface_Union,
 126
 127                         .MasterInterfaceNumber  = INTERFACE_ID_CDC_CCI,
 128                         .SlaveInterfaceNumber   = INTERFACE_ID_CDC_DCI,
 129                 },
 130
 131         .CDC_NotificationEndpoint =
 132                 {
 133                         .Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
 134
 135                         .EndpointAddress        = CDC_NOTIFICATION_EPADDR,
 136                         .Attributes             = (EP_TYPE_INTERRUPT | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
 137                         .EndpointSize           = CDC_NOTIFICATION_EPSIZE,
 138                         .PollingIntervalMS      = 0xFF
 139                 },
 140
 141         .CDC_DCI_Interface =
 142                 {
 143                         .Header                 = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
 144
 145                         .InterfaceNumber        = INTERFACE_ID_CDC_DCI,
 146                         .AlternateSetting       = 0,
 147
 148                         .TotalEndpoints         = 2,
 149
 150                         .Class                  = CDC_CSCP_CDCDataClass,
 151                         .SubClass               = CDC_CSCP_NoDataSubclass,
 152                         .Protocol               = CDC_CSCP_NoDataProtocol,
 153
 154                         .InterfaceStrIndex      = NO_DESCRIPTOR
 155                 },
 156
 157         .CDC_DataOutEndpoint =
 158                 {
 159                         .Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
 160
 161                         .EndpointAddress        = CDC_RX_EPADDR,
 162                         .Attributes             = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
 163                         .EndpointSize           = CDC_TXRX_EPSIZE,
 164                         .PollingIntervalMS      = 0x05
 165                 },
 166
 167         .CDC_DataInEndpoint =
 168                 {
 169                         .Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
 170
 171                         .EndpointAddress        = CDC_TX_EPADDR,
 172                         .Attributes             = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
 173                         .EndpointSize           = CDC_TXRX_EPSIZE,
 174                         .PollingIntervalMS      = 0x05
 175                 }
 176 };
 177
 178 /** Language descriptor structure. This descriptor, located in FLASH memory, is returned when the host requests
 179  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
 180  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
 181  */
 182 const USB_Descriptor_String_t PROGMEM LanguageString = USB_STRING_DESCRIPTOR_ARRAY(LANGUAGE_ID_ENG);
 183
 184 /** Manufacturer descriptor string. This is a Unicode string containing the manufacturer's details in human readable
 185  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
 186  *  Descriptor.
 187  */
 188 const USB_Descriptor_String_t PROGMEM ManufacturerString = USB_STRING_DESCRIPTOR(L"Dean Camera");
 189
 190 /** Product descriptor string. This is a Unicode string containing the product's details in human readable form,
 191  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
 192  *  Descriptor.
 193  */
 194 const USB_Descriptor_String_t PROGMEM ProductString = USB_STRING_DESCRIPTOR(L"LED Notifier");
 195
 196 /** This function is called by the library when in device mode, and must be overridden (see library "USB Descriptors"
 197  *  documentation) by the application code so that the address and size of a requested descriptor can be given
 198  *  to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
 199  *  is called so that the descriptor details can be passed back and the appropriate descriptor sent back to the
 200  *  USB host.
 201  */
 202 uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
 203                                     const uint16_t wIndex,
 204                                     const void** const DescriptorAddress)
 205 {
 206         const uint8_t  DescriptorType   = (wValue >> 8);
 207         const uint8_t  DescriptorNumber = (wValue & 0xFF);
 208
 209         const void* Address = NULL;
 210         uint16_t    Size    = NO_DESCRIPTOR;
 211
 212         switch (DescriptorType)
 213         {
 214                 case DTYPE_Device:
 215                         Address = &DeviceDescriptor;
 216                         Size    = sizeof(USB_Descriptor_Device_t);
 217                         break;
 218                 case DTYPE_Configuration:
 219                         Address = &ConfigurationDescriptor;
 220                         Size    = sizeof(USB_Descriptor_Configuration_t);
 221                         break;
 222                 case DTYPE_String:
 223                         switch (DescriptorNumber)
 224                         {
 225                                 case STRING_ID_Language:
 226                                         Address = &LanguageString;
 227                                         Size    = pgm_read_byte(&LanguageString.Header.Size);
 228                                         break;
 229                                 case STRING_ID_Manufacturer:
 230                                         Address = &ManufacturerString;
 231                                         Size    = pgm_read_byte(&ManufacturerString.Header.Size);
 232                                         break;
 233                                 case STRING_ID_Product:
 234                                         Address = &ProductString;
 235                                         Size    = pgm_read_byte(&ProductString.Header.Size);
 236                                         break;
 237                         }
 238
 239                         break;
 240         }
 241
 242         *DescriptorAddress = Address;
 243         return Size;
 244 }
 245