Demos/Device/Incomplete/TestAndMeasurement/Descriptors.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   Copyright 2010  Peter Lawrence (majbthrd [at] gmail [dot] com)
  12
  13   Permission to use, copy, modify, distribute, and sell this
  14   software and its documentation for any purpose is hereby granted
  15   without fee, provided that the above copyright notice appear in
  16   all copies and that both that the copyright notice and this
  17   permission notice and warranty disclaimer appear in supporting
  18   documentation, and that the name of the author not be used in
  19   advertising or publicity pertaining to distribution of the
  20   software without specific, written prior permission.
  21
  22   The author disclaim all warranties with regard to this
  23   software, including all implied warranties of merchantability
  24   and fitness.  In no event shall the author be liable for any
  25   special, indirect or consequential damages or any damages
  26   whatsoever resulting from loss of use, data or profits, whether
  27   in an action of contract, negligence or other tortious action,
  28   arising out of or in connection with the use or performance of
  29   this software.
  30 */
  31
  32 /** \file
  33  *
  34  *  USB Device Descriptors, for library use when in USB device mode. Descriptors are special
  35  *  computer-readable structures which the host requests upon device enumeration, to determine
  36  *  the device's capabilities and functions.
  37  */
  38
  39 #include "Descriptors.h"
  40
  41 /* On some devices, there is a factory set internal serial number which can be automatically sent to the host as
  42  * the device's serial number when the Device Descriptor's .SerialNumStrIndex entry is set to USE_INTERNAL_SERIAL.
  43  * This allows the host to track a device across insertions on different ports, allowing them to retain allocated
  44  * resources like COM port numbers and drivers. On demos using this feature, give a warning on unsupported devices
  45  * so that the user can supply their own serial number descriptor instead or remove the USE_INTERNAL_SERIAL value
  46  * from the Device Descriptor (forcing the host to generate a serial number for each device from the VID, PID and
  47  * port location).
  48  */
  49 #if (USE_INTERNAL_SERIAL == NO_DESCRIPTOR)
  50         #warning USE_INTERNAL_SERIAL is not available on this AVR - please manually construct a device serial descriptor.
  51 #endif
  52
  53 /** Device descriptor structure. This descriptor, located in FLASH memory, describes the overall
  54  *  device characteristics, including the supported USB version, control endpoint size and the
  55  *  number of device configurations. The descriptor is read out by the USB host when the enumeration
  56  *  process begins.
  57  */
  58 USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  59 {
  60         .Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
  61
  62         .USBSpecification       = VERSION_BCD(02.00),
  63         .Class                  = 0x00,
  64         .SubClass               = 0x00,
  65         .Protocol               = 0x00,
  66
  67         .Endpoint0Size          = FIXED_CONTROL_ENDPOINT_SIZE,
  68
  69         .VendorID               = 0x03EB,
  70         .ProductID              = 0x2065,
  71         .ReleaseNumber          = 0x0000,
  72
  73         .ManufacturerStrIndex   = 0x01,
  74         .ProductStrIndex        = 0x02,
  75         .SerialNumStrIndex      = USE_INTERNAL_SERIAL,
  76
  77         .NumberOfConfigurations = FIXED_NUM_CONFIGURATIONS
  78 };
  79
  80 /** Configuration descriptor structure. This descriptor, located in FLASH memory, describes the usage
  81  *  of the device in one of its supported configurations, including information about any device interfaces
  82  *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
  83  *  a configuration so that the host may correctly communicate with the USB device.
  84  */
  85 USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
  86 {
  87         .Config =
  88                 {
  89                         .Header                 = {.Size = sizeof(USB_Descriptor_Configuration_Header_t), .Type = DTYPE_Configuration},
  90
  91                         .TotalConfigurationSize = sizeof(USB_Descriptor_Configuration_t),
  92                         .TotalInterfaces        = 1,
  93
  94                         .ConfigurationNumber    = 1,
  95                         .ConfigurationStrIndex  = NO_DESCRIPTOR,
  96
  97                         .ConfigAttributes       = (USB_CONFIG_ATTR_BUSPOWERED | USB_CONFIG_ATTR_SELFPOWERED),
  98
  99                         .MaxPowerConsumption    = USB_CONFIG_POWER_MA(100)
 100                 },
 101
 102         .Interface =
 103                 {
 104                         .Header                 = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
 105
 106                         .InterfaceNumber        = 0x00,
 107                         .AlternateSetting       = 0x00,
 108
 109                         .TotalEndpoints         = 2,
 110
 111                         .Class                  = 0xFE,
 112                         .SubClass               = 0x03,
 113                         .Protocol               = 0x01,
 114
 115                         .InterfaceStrIndex      = NO_DESCRIPTOR
 116                 },
 117
 118         .DataOutEndpoint =
 119                 {
 120                         .Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
 121
 122                         .EndpointAddress        = (ENDPOINT_DESCRIPTOR_DIR_OUT | TMC_OUT_EPNUM),
 123                         .Attributes             = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
 124                         .EndpointSize           = TMC_IO_EPSIZE,
 125                         .PollingIntervalMS      = 0x00
 126                 },
 127
 128         .DataInEndpoint =
 129                 {
 130                         .Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
 131
 132                         .EndpointAddress        = (ENDPOINT_DESCRIPTOR_DIR_IN | TMC_IN_EPNUM),
 133                         .Attributes             = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
 134                         .EndpointSize           = TMC_IO_EPSIZE,
 135                         .PollingIntervalMS      = 0x00
 136                 }
 137 };
 138
 139 /** Language descriptor structure. This descriptor, located in FLASH memory, is returned when the host requests
 140  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
 141  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
 142  */
 143 USB_Descriptor_String_t PROGMEM LanguageString =
 144 {
 145         .Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 146
 147         .UnicodeString          = {LANGUAGE_ID_ENG}
 148 };
 149
 150 /** Manufacturer descriptor string. This is a Unicode string containing the manufacturer's details in human readable
 151  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
 152  *  Descriptor.
 153  */
 154 USB_Descriptor_String_t PROGMEM ManufacturerString =
 155 {
 156         .Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 157
 158         .UnicodeString          = L"Dean Camera"
 159 };
 160
 161 /** Product descriptor string. This is a Unicode string containing the product's details in human readable form,
 162  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
 163  *  Descriptor.
 164  */
 165 USB_Descriptor_String_t PROGMEM ProductString =
 166 {
 167         .Header                 = {.Size = USB_STRING_LEN(13), .Type = DTYPE_String},
 168
 169         .UnicodeString          = L"LUFA TMC Demo"
 170 };
 171
 172 /** This function is called by the library when in device mode, and must be overridden (see library "USB Descriptors"
 173  *  documentation) by the application code so that the address and size of a requested descriptor can be given
 174  *  to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
 175  *  is called so that the descriptor details can be passed back and the appropriate descriptor sent back to the
 176  *  USB host.
 177  */
 178 uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
 179                                     const uint8_t wIndex,
 180                                     void** const DescriptorAddress)
 181 {
 182         const uint8_t  DescriptorType   = (wValue >> 8);
 183         const uint8_t  DescriptorNumber = (wValue & 0xFF);
 184
 185         void*          Address = NULL;
 186         uint16_t       Size    = NO_DESCRIPTOR;
 187
 188         switch (DescriptorType)
 189         {
 190                 case DTYPE_Device:
 191                         Address = (void*)&DeviceDescriptor;
 192                         Size    = sizeof(USB_Descriptor_Device_t);
 193                         break;
 194                 case DTYPE_Configuration:
 195                         Address = (void*)&ConfigurationDescriptor;
 196                         Size    = sizeof(USB_Descriptor_Configuration_t);
 197                         break;
 198                 case DTYPE_String:
 199                         switch (DescriptorNumber)
 200                         {
 201                                 case 0x00:
 202                                         Address = (void*)&LanguageString;
 203                                         Size    = pgm_read_byte(&LanguageString.Header.Size);
 204                                         break;
 205                                 case 0x01:
 206                                         Address = (void*)&ManufacturerString;
 207                                         Size    = pgm_read_byte(&ManufacturerString.Header.Size);
 208                                         break;
 209                                 case 0x02:
 210                                         Address = (void*)&ProductString;
 211                                         Size    = pgm_read_byte(&ProductString.Header.Size);
 212                                         break;
 213                         }
 214
 215                         break;
 216         }
 217
 218         *DescriptorAddress = Address;
 219         return Size;
 220 }