Projects/AVRISP-MKII/Descriptors.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   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 /** \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 USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
  46 {
  47         .Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
  48
  49         .USBSpecification       = VERSION_BCD(01.10),
  50         .Class                  = USB_CSCP_VendorSpecificClass,
  51         .SubClass               = USB_CSCP_NoDeviceSubclass,
  52         .Protocol               = USB_CSCP_NoDeviceProtocol,
  53
  54         .Endpoint0Size          = FIXED_CONTROL_ENDPOINT_SIZE,
  55
  56         .VendorID               = 0x03EB,
  57         .ProductID              = 0x2104,
  58         .ReleaseNumber          = VERSION_BCD(02.00),
  59
  60         .ManufacturerStrIndex   = 0x01,
  61         .ProductStrIndex        = 0x02,
  62         .SerialNumStrIndex      = 0x03,
  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 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        = 1,
  80
  81                         .ConfigurationNumber    = 1,
  82                         .ConfigurationStrIndex  = NO_DESCRIPTOR,
  83
  84                         .ConfigAttributes       = USB_CONFIG_ATTR_BUSPOWERED,
  85
  86                         .MaxPowerConsumption    = USB_CONFIG_POWER_MA(100)
  87                 },
  88
  89         .AVRISP_Interface =
  90                 {
  91                         .Header                 = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
  92
  93                         .InterfaceNumber        = 0,
  94                         .AlternateSetting       = 0,
  95
  96                         .TotalEndpoints         = 2,
  97
  98                         .Class                  = USB_CSCP_VendorSpecificClass,
  99                         .SubClass               = 0x00,
 100                         .Protocol               = 0x00,
 101
 102                         .InterfaceStrIndex      = NO_DESCRIPTOR
 103                 },
 104
 105         .AVRISP_DataInEndpoint =
 106                 {
 107                         .Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
 108
 109                         .EndpointAddress        = (ENDPOINT_DESCRIPTOR_DIR_IN | AVRISP_DATA_IN_EPNUM),
 110                         .Attributes             = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
 111                         .EndpointSize           = AVRISP_DATA_EPSIZE,
 112                         .PollingIntervalMS      = 0x0A
 113                 },
 114
 115         .AVRISP_DataOutEndpoint =
 116                 {
 117                         .Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
 118
 119                         .EndpointAddress        = (ENDPOINT_DESCRIPTOR_DIR_OUT | AVRISP_DATA_OUT_EPNUM),
 120                         .Attributes             = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
 121                         .EndpointSize           = AVRISP_DATA_EPSIZE,
 122                         .PollingIntervalMS      = 0x0A
 123                 },
 124 };
 125
 126 /** Language descriptor structure. This descriptor, located in FLASH memory, is returned when the host requests
 127  *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
 128  *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
 129  */
 130 USB_Descriptor_String_t PROGMEM LanguageString =
 131 {
 132         .Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
 133
 134         .UnicodeString          = {LANGUAGE_ID_ENG}
 135 };
 136
 137 /** Manufacturer descriptor string. This is a Unicode string containing the manufacturer's details in human readable
 138  *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
 139  *  Descriptor.
 140  */
 141 USB_Descriptor_String_t PROGMEM ManufacturerString =
 142 {
 143         .Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
 144
 145         .UnicodeString          = L"Dean Camera"
 146 };
 147
 148 /** Product descriptor string. This is a Unicode string containing the product's details in human readable form,
 149  *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
 150  *  Descriptor.
 151  */
 152 USB_Descriptor_String_t PROGMEM ProductString =
 153 {
 154         .Header                 = {.Size = USB_STRING_LEN(22), .Type = DTYPE_String},
 155
 156         .UnicodeString          = L"LUFA AVRISP MkII Clone"
 157 };
 158
 159 /** Serial number string. This is a Unicode string containing the device's unique serial number, expressed as a
 160  *  series of uppercase hexadecimal digits.
 161  */
 162 USB_Descriptor_String_t PROGMEM SerialString =
 163 {
 164         .Header                 = {.Size = USB_STRING_LEN(13), .Type = DTYPE_String},
 165
 166         .UnicodeString          = L"0000A00128255"
 167 };
 168
 169 /** This function is called by the library when in device mode, and must be overridden (see library "USB Descriptors"
 170  *  documentation) by the application code so that the address and size of a requested descriptor can be given
 171  *  to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
 172  *  is called so that the descriptor details can be passed back and the appropriate descriptor sent back to the
 173  *  USB host.
 174  */
 175 uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
 176                                     const uint8_t wIndex,
 177                                     const void** const DescriptorAddress)
 178 {
 179         const uint8_t  DescriptorType   = (wValue >> 8);
 180         const uint8_t  DescriptorNumber = (wValue & 0xFF);
 181
 182         const void* Address = NULL;
 183         uint16_t    Size    = NO_DESCRIPTOR;
 184
 185         switch (DescriptorType)
 186         {
 187                 case DTYPE_Device:
 188                         Address = &DeviceDescriptor;
 189                         Size    = sizeof(USB_Descriptor_Device_t);
 190                         break;
 191                 case DTYPE_Configuration:
 192                         Address = &ConfigurationDescriptor;
 193                         Size    = sizeof(USB_Descriptor_Configuration_t);
 194                         break;
 195                 case DTYPE_String:
 196                         switch (DescriptorNumber)
 197                         {
 198                                 case 0x00:
 199                                         Address = &LanguageString;
 200                                         Size    = pgm_read_byte(&LanguageString.Header.Size);
 201                                         break;
 202                                 case 0x01:
 203                                         Address = &ManufacturerString;
 204                                         Size    = pgm_read_byte(&ManufacturerString.Header.Size);
 205                                         break;
 206                                 case 0x02:
 207                                         Address = &ProductString;
 208                                         Size    = pgm_read_byte(&ProductString.Header.Size);
 209                                         break;
 210                                 case 0x03:
 211                                         Address = &SerialString;
 212                                         Size    = pgm_read_byte(&SerialString.Header.Size);
 213                                         break;
 214                         }
 215
 216                         break;
 217         }
 218
 219         *DescriptorAddress = Address;
 220         return Size;
 221 }
 222