X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/524decdeb3a0a4c7adbeb4af906556e7bc6dd77c..b221e7d175e4b5ca463fdd6d05b8c3fc71bd7c40:/LUFA/Drivers/USB/HighLevel/StdDescriptors.h diff --git a/LUFA/Drivers/USB/HighLevel/StdDescriptors.h b/LUFA/Drivers/USB/HighLevel/StdDescriptors.h index 0e0d1e9f4..0b56ab6d0 100644 --- a/LUFA/Drivers/USB/HighLevel/StdDescriptors.h +++ b/LUFA/Drivers/USB/HighLevel/StdDescriptors.h @@ -34,16 +34,6 @@ * Standard USB device descriptor defines and retrieval routines, for USB devices. This module contains * structures and macros for the easy creation of standard USB descriptors in USB device projects. * - * All standard descriptors have their elements named in an identical manner to the official USB specification, - * however slightly more verbose alternate (non-standard) names are also supplied if the macro - * USE_NONSTANDARD_DESCRIPTOR_NAMES is defined in the user project makefile and passed to the compiler at - * compilation time using the -D option. - * - * The non-standard names are documented here - if USE_NONSTANDARD_DESCRIPTOR_NAMES is not defined, then all - * descriptors will contain elements named identically to the official USB specification. The alternately - * named descriptor elements are placed in the same order inside the descriptor structures as their officially - * named counterparts, thus they can be correlated easily with the official USB specification. - * * @{ */ @@ -206,170 +196,232 @@ }; /* Type Defines: */ - /** Type define for all descriptor's header, indicating the descriptor's length and type. + /** Type define for all descriptors standard header, indicating the descriptor's length and type. This structure + * uses LUFA-specific element names to make each element's purpose clearer. * - * \note The non-standard structure element names are documented here. If the - * USE_NONSTANDARD_DESCRIPTOR_NAMES token is not set, this structure contains elements - * with names identical to those listed in the USB standard. + * \see \ref USB_StdDescriptor_Header_t for the version of this define with standard element names */ typedef struct { - #if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES) || defined(__DOXYGEN__) - uint8_t Size; /**< Size of the descriptor, in bytes. */ - uint8_t Type; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value - * given by the specific class. - */ - #else - uint8_t bLength; - uint8_t bDescriptorType; - #endif + uint8_t Size; /**< Size of the descriptor, in bytes. */ + uint8_t Type; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value + * given by the specific class. + */ } USB_Descriptor_Header_t; - /** Type define for a standard device descriptor. + /** Type define for all descriptors standard header, indicating the descriptor's length and type. This structure + * uses the relevant standard's given element names to ensure compatibility with the standard. + * + * \see \ref USB_Descriptor_Header_t for the version of this define with non-standard LUFA specific element names + */ + typedef struct + { + uint8_t bLength; /**< Size of the descriptor, in bytes. */ + uint8_t bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value + * given by the specific class. + */ + } USB_StdDescriptor_Header_t; + + /** Type define for a standard Device Descriptor. This structure uses LUFA-specific element names to make each + * element's purpose clearer. * - * \note The non-standard structure element names are documented here. If the - * USE_NONSTANDARD_DESCRIPTOR_NAMES token is not set, this structure contains elements - * with names identical to those listed in the USB standard. + * \see \ref USB_StdDescriptor_Device_t for the version of this define with standard element names */ typedef struct { - #if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES) || defined(__DOXYGEN__) USB_Descriptor_Header_t Header; /**< Descriptor header, including type and size. */ - uint16_t USBSpecification; /**< BCD of the supported USB specification. */ - uint8_t Class; /**< USB device class. */ - uint8_t SubClass; /**< USB device subclass. */ - uint8_t Protocol; /**< USB device protocol. */ + uint16_t USBSpecification; /**< BCD of the supported USB specification. */ + uint8_t Class; /**< USB device class. */ + uint8_t SubClass; /**< USB device subclass. */ + uint8_t Protocol; /**< USB device protocol. */ - uint8_t Endpoint0Size; /**< Size of the control (address 0) endpoint's bank in bytes. */ + uint8_t Endpoint0Size; /**< Size of the control (address 0) endpoint's bank in bytes. */ - uint16_t VendorID; /**< Vendor ID for the USB product. */ - uint16_t ProductID; /**< Unique product ID for the USB product. */ - uint16_t ReleaseNumber; /**< Product release (version) number. */ + uint16_t VendorID; /**< Vendor ID for the USB product. */ + uint16_t ProductID; /**< Unique product ID for the USB product. */ + uint16_t ReleaseNumber; /**< Product release (version) number. */ - uint8_t ManufacturerStrIndex; /**< String index for the manufacturer's name. The - * host will request this string via a separate - * control request for the string descriptor. - * - * \note If no string supplied, use \ref NO_DESCRIPTOR. - */ - uint8_t ProductStrIndex; /**< String index for the product name/details. - * - * \see ManufacturerStrIndex structure entry. - */ - uint8_t SerialNumStrIndex; /**< String index for the product's globally unique hexadecimal - * serial number, in uppercase Unicode ASCII. - * - * \note On some AVR models, there is an embedded serial number - * in the chip which can be used for the device serial number. - * To use this serial number, set this to USE_INTERNAL_SERIAL. - * On unsupported devices, this will evaluate to 0 and will cause - * the host to generate a pseudo-unique value for the device upon - * insertion. - * - * \see ManufacturerStrIndex structure entry. - */ - - uint8_t NumberOfConfigurations; /**< Total number of configurations supported by - * the device. - */ - #else - uint8_t bLength; - uint8_t bDescriptorType; - uint16_t bcdUSB; - uint8_t bDeviceClass; - uint8_t bDeviceSubClass; - uint8_t bDeviceProtocol; - uint8_t bMaxPacketSize0; - uint16_t idVendor; - uint16_t idProduct; - uint16_t bcdDevice; - uint8_t iManufacturer; - uint8_t iProduct; - uint8_t iSerialNumber; - uint8_t bNumConfigurations; - #endif + uint8_t ManufacturerStrIndex; /**< String index for the manufacturer's name. The + * host will request this string via a separate + * control request for the string descriptor. + * + * \note If no string supplied, use \ref NO_DESCRIPTOR. + */ + uint8_t ProductStrIndex; /**< String index for the product name/details. + * + * \see ManufacturerStrIndex structure entry. + */ + uint8_t SerialNumStrIndex; /**< String index for the product's globally unique hexadecimal + * serial number, in uppercase Unicode ASCII. + * + * \note On some AVR models, there is an embedded serial number + * in the chip which can be used for the device serial number. + * To use this serial number, set this to USE_INTERNAL_SERIAL. + * On unsupported devices, this will evaluate to 0 and will cause + * the host to generate a pseudo-unique value for the device upon + * insertion. + * + * \see ManufacturerStrIndex structure entry. + */ + uint8_t NumberOfConfigurations; /**< Total number of configurations supported by + * the device. + */ } USB_Descriptor_Device_t; - /** Type define for a standard configuration descriptor. + /** Type define for a standard Device Descriptor. This structure uses the relevant standard's given element names + * to ensure compatibility with the standard. * - * \note The non-standard structure element names are documented here. If the - * USE_NONSTANDARD_DESCRIPTOR_NAMES token is not set, this structure contains elements - * with names identical to those listed in the USB standard. + * \see \ref USB_Descriptor_Device_t for the version of this define with non-standard LUFA specific element names + */ + typedef struct + { + uint8_t bLength; /**< Size of the descriptor, in bytes. */ + uint8_t bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value + * given by the specific class. + */ + uint16_t bcdUSB; /**< BCD of the supported USB specification. */ + uint8_t bDeviceClass; /**< USB device class. */ + uint8_t bDeviceSubClass; /**< USB device subclass. */ + uint8_t bDeviceProtocol; /**< USB device protocol. */ + uint8_t bMaxPacketSize0; /**< Size of the control (address 0) endpoint's bank in bytes. */ + uint16_t idVendor; /**< Vendor ID for the USB product. */ + uint16_t idProduct; /**< Unique product ID for the USB product. */ + uint16_t bcdDevice; /**< Product release (version) number. */ + uint8_t iManufacturer; /**< String index for the manufacturer's name. The + * host will request this string via a separate + * control request for the string descriptor. + * + * \note If no string supplied, use \ref NO_DESCRIPTOR. + */ + uint8_t iProduct; /**< String index for the product name/details. + * + * \see ManufacturerStrIndex structure entry. + */ + uint8_t iSerialNumber; /**< String index for the product's globally unique hexadecimal + * serial number, in uppercase Unicode ASCII. + * + * \note On some AVR models, there is an embedded serial number + * in the chip which can be used for the device serial number. + * To use this serial number, set this to USE_INTERNAL_SERIAL. + * On unsupported devices, this will evaluate to 0 and will cause + * the host to generate a pseudo-unique value for the device upon + * insertion. + * + * \see ManufacturerStrIndex structure entry. + */ + uint8_t bNumConfigurations; /**< Total number of configurations supported by + * the device. + */ + } USB_StdDescriptor_Device_t; + + /** Type define for a standard Configuration Descriptor header. This structure uses LUFA-specific element names + * to make each element's purpose clearer. + * + * \see \ref USB_StdDescriptor_Configuration_Header_t for the version of this define with standard element names */ typedef struct { - #if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES) || defined(__DOXYGEN__) USB_Descriptor_Header_t Header; /**< Descriptor header, including type and size. */ - uint16_t TotalConfigurationSize; /**< Size of the configuration descriptor header, - * and all sub descriptors inside the configuration. - */ - uint8_t TotalInterfaces; /**< Total number of interfaces in the configuration. */ + uint16_t TotalConfigurationSize; /**< Size of the configuration descriptor header, + * and all sub descriptors inside the configuration. + */ + uint8_t TotalInterfaces; /**< Total number of interfaces in the configuration. */ - uint8_t ConfigurationNumber; /**< Configuration index of the current configuration. */ - uint8_t ConfigurationStrIndex; /**< Index of a string descriptor describing the configuration. */ + uint8_t ConfigurationNumber; /**< Configuration index of the current configuration. */ + uint8_t ConfigurationStrIndex; /**< Index of a string descriptor describing the configuration. */ - uint8_t ConfigAttributes; /**< Configuration attributes, comprised of a mask of zero or - * more USB_CONFIG_ATTR_* masks. - */ + uint8_t ConfigAttributes; /**< Configuration attributes, comprised of a mask of zero or + * more USB_CONFIG_ATTR_* masks. + */ - uint8_t MaxPowerConsumption; /**< Maximum power consumption of the device while in the - * current configuration, calculated by the \ref USB_CONFIG_POWER_MA() - * macro. - */ - #else - uint8_t bLength; - uint8_t bDescriptorType; - uint16_t wTotalLength; - uint8_t bNumInterfaces; - uint8_t bConfigurationValue; - uint8_t iConfiguration; - uint8_t bmAttributes; - uint8_t bMaxPower; - #endif + uint8_t MaxPowerConsumption; /**< Maximum power consumption of the device while in the + * current configuration, calculated by the \ref USB_CONFIG_POWER_MA() + * macro. + */ } USB_Descriptor_Configuration_Header_t; - - /** Type define for a standard interface descriptor. + + /** Type define for a standard Configuration Descriptor header. This structure uses the relevant standard's given element names + * to ensure compatibility with the standard. * - * \note The non-standard structure element names are documented here. If the - * USE_NONSTANDARD_DESCRIPTOR_NAMES token is not set, this structure contains elements - * with names identical to those listed in the USB standard. + * \see \ref USB_Descriptor_Device_t for the version of this define with non-standard LUFA specific element names + */ + typedef struct + { + uint8_t bLength; /**< Size of the descriptor, in bytes. */ + uint8_t bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value + * given by the specific class. + */ + uint16_t wTotalLength; /**< Size of the configuration descriptor header, + * and all sub descriptors inside the configuration. + */ + uint8_t bNumInterfaces; /**< Total number of interfaces in the configuration. */ + uint8_t bConfigurationValue; /**< Configuration index of the current configuration. */ + uint8_t iConfiguration; /**< Index of a string descriptor describing the configuration. */ + uint8_t bmAttributes; /**< Configuration attributes, comprised of a mask of zero or + * more USB_CONFIG_ATTR_* masks. + */ + uint8_t bMaxPower; /**< Maximum power consumption of the device while in the + * current configuration, calculated by the \ref USB_CONFIG_POWER_MA() + * macro. + */ + } USB_StdDescriptor_Configuration_Header_t; + + /** Type define for a standard Interface Descriptor. This structure uses LUFA-specific element names + * to make each element's purpose clearer. + * + * \see \ref USB_StdDescriptor_Interface_t for the version of this define with standard element names */ typedef struct { - #if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES) || defined(__DOXYGEN__) USB_Descriptor_Header_t Header; /**< Descriptor header, including type and size. */ - uint8_t InterfaceNumber; /**< Index of the interface in the current configuration. */ - uint8_t AlternateSetting; /**< Alternate setting for the interface number. The same - * interface number can have multiple alternate settings - * with different endpoint configurations, which can be - * selected by the host. - */ - uint8_t TotalEndpoints; /**< Total number of endpoints in the interface. */ + uint8_t InterfaceNumber; /**< Index of the interface in the current configuration. */ + uint8_t AlternateSetting; /**< Alternate setting for the interface number. The same + * interface number can have multiple alternate settings + * with different endpoint configurations, which can be + * selected by the host. + */ + uint8_t TotalEndpoints; /**< Total number of endpoints in the interface. */ - uint8_t Class; /**< Interface class ID. */ - uint8_t SubClass; /**< Interface subclass ID. */ - uint8_t Protocol; /**< Interface protocol ID. */ - - uint8_t InterfaceStrIndex; /**< Index of the string descriptor describing the - * interface. - */ - #else - uint8_t bLength; - uint8_t bDescriptorType; - uint8_t bInterfaceNumber; - uint8_t bAlternateSetting; - uint8_t bNumEndpoints; - uint8_t bInterfaceClass; - uint8_t bInterfaceSubClass; - uint8_t bInterfaceProtocol; - uint8_t iInterface; - #endif - } USB_Descriptor_Interface_t; + uint8_t Class; /**< Interface class ID. */ + uint8_t SubClass; /**< Interface subclass ID. */ + uint8_t Protocol; /**< Interface protocol ID. */ - /** Type define for a standard Interface Association descriptor. + uint8_t InterfaceStrIndex; /**< Index of the string descriptor describing the + * interface. + */ + } USB_Descriptor_Interface_t; + + /** Type define for a standard Interface Descriptor. This structure uses the relevant standard's given element names + * to ensure compatibility with the standard. + * + * \see \ref USB_Descriptor_Interface_t for the version of this define with non-standard LUFA specific element names + */ + typedef struct + { + uint8_t bLength; /**< Size of the descriptor, in bytes. */ + uint8_t bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value + * given by the specific class. + */ + uint8_t bInterfaceNumber; /**< Index of the interface in the current configuration. */ + uint8_t bAlternateSetting; /**< Alternate setting for the interface number. The same + * interface number can have multiple alternate settings + * with different endpoint configurations, which can be + * selected by the host. + */ + uint8_t bNumEndpoints; /**< Total number of endpoints in the interface. */ + uint8_t bInterfaceClass; /**< Interface class ID. */ + uint8_t bInterfaceSubClass; /**< Interface subclass ID. */ + uint8_t bInterfaceProtocol; /**< Interface protocol ID. */ + uint8_t iInterface; /**< Index of the string descriptor describing the + * interface. + */ + } USB_StdDescriptor_Interface_t; + + /** Type define for a standard Interface Association Descriptor. This structure uses LUFA-specific element names + * to make each element's purpose clearer. * * This descriptor has been added as a supplement to the USB2.0 standard, in the ECN located at * http://www.usb.org/developers/docs/InterfaceAssociationDescriptor_ecn.pdf. It allows compound @@ -377,72 +429,105 @@ * together at the point of enumeration, loading one generic driver for all the interfaces in the single * function. Read the ECN for more information. * - * \note The non-standard structure element names are documented here. If the - * USE_NONSTANDARD_DESCRIPTOR_NAMES token is not set, this structure contains elements - * with names identical to those listed in the USB standard. + * \see \ref USB_StdDescriptor_Interface_Association_t for the version of this define with standard element names */ typedef struct { - #if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES) || defined(__DOXYGEN__) USB_Descriptor_Header_t Header; /**< Descriptor header, including type and size. */ - uint8_t FirstInterfaceIndex; /**< Index of the first associated interface. */ - uint8_t TotalInterfaces; /** Total number of associated interfaces. */ - - uint8_t Class; /**< Interface class ID. */ - uint8_t SubClass; /**< Interface subclass ID. */ - uint8_t Protocol; /**< Interface protocol ID. */ - - uint8_t IADStrIndex; /**< Index of the string descriptor describing the - * interface association. - */ - #else - uint8_t bLength; - uint8_t bDescriptorType; - uint8_t bFirstInterface; - uint8_t bInterfaceCount; - uint8_t bFunctionClass; - uint8_t bFunctionSubClass; - uint8_t bFunctionProtocol; - uint8_t iFunction; - #endif - } USB_Descriptor_Interface_Association_t; + uint8_t FirstInterfaceIndex; /**< Index of the first associated interface. */ + uint8_t TotalInterfaces; /** Total number of associated interfaces. */ - /** Type define for a standard endpoint descriptor. + uint8_t Class; /**< Interface class ID. */ + uint8_t SubClass; /**< Interface subclass ID. */ + uint8_t Protocol; /**< Interface protocol ID. */ + + uint8_t IADStrIndex; /**< Index of the string descriptor describing the + * interface association. + */ + } USB_Descriptor_Interface_Association_t; + + /** Type define for a standard Interface Association Descriptor. This structure uses the relevant standard's given + * element names to ensure compatibility with the standard. * - * \note The non-standard structure element names are documented here. If the - * USE_NONSTANDARD_DESCRIPTOR_NAMES token is not set, this structure contains elements - * with names identical to those listed in the USB standard. - */ + * This descriptor has been added as a supplement to the USB2.0 standard, in the ECN located at + * http://www.usb.org/developers/docs/InterfaceAssociationDescriptor_ecn.pdf. It allows compound + * devices with multiple interfaces related to the same function to have the multiple interfaces bound + * together at the point of enumeration, loading one generic driver for all the interfaces in the single + * function. Read the ECN for more information. + * + * \see \ref USB_Descriptor_Interface_Association_t for the version of this define with non-standard LUFA specific + * element names + */ + typedef struct + { + uint8_t bLength; /**< Size of the descriptor, in bytes. */ + uint8_t bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value + * given by the specific class. + */ + uint8_t bFirstInterface; /**< Index of the first associated interface. */ + uint8_t bInterfaceCount; /** Total number of associated interfaces. */ + uint8_t bFunctionClass; /**< Interface class ID. */ + uint8_t bFunctionSubClass; /**< Interface subclass ID. */ + uint8_t bFunctionProtocol; /**< Interface protocol ID. */ + uint8_t iFunction; /**< Index of the string descriptor describing the + * interface association. + */ + } USB_StdDescriptor_Interface_Association_t; + + /** Type define for a standard Endpoint Descriptor. This structure uses LUFA-specific element names + * to make each element's purpose clearer. + * + * \see \ref USB_StdDescriptor_Endpoint_t for the version of this define with standard element names + */ typedef struct { - #if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES) || defined(__DOXYGEN__) USB_Descriptor_Header_t Header; /**< Descriptor header, including type and size. */ - uint8_t EndpointAddress; /**< Logical address of the endpoint within the device - * for the current configuration, including direction - * mask. - */ - uint8_t Attributes; /**< Endpoint attributes, comprised of a mask of the - * endpoint type (EP_TYPE_*) and attributes (ENDPOINT_ATTR_*) - * masks. - */ - uint16_t EndpointSize; /**< Size of the endpoint bank, in bytes. This indicates the - * maximum packet size that the endpoint can receive at a time. - */ + uint8_t EndpointAddress; /**< Logical address of the endpoint within the device + * for the current configuration, including direction + * mask. + */ + uint8_t Attributes; /**< Endpoint attributes, comprised of a mask of the + * endpoint type (EP_TYPE_*) and attributes (ENDPOINT_ATTR_*) + * masks. + */ + uint16_t EndpointSize; /**< Size of the endpoint bank, in bytes. This indicates the + * maximum packet size that the endpoint can receive at a time. + */ - uint8_t PollingIntervalMS; /**< Polling interval in milliseconds for the endpoint - * if it is an INTERRUPT or ISOCHRONOUS type. - */ - #else - uint8_t bLength; - uint8_t bDescriptorType; - uint8_t bEndpointAddress; - uint8_t bmAttributes; - uint16_t wMaxPacketSize; - uint8_t bInterval; - #endif + uint8_t PollingIntervalMS; /**< Polling interval in milliseconds for the endpoint + * if it is an INTERRUPT or ISOCHRONOUS type. + */ } USB_Descriptor_Endpoint_t; + + /** Type define for a standard Endpoint Descriptor. This structure uses the relevant standard's given + * element names to ensure compatibility with the standard. + * + * \see \ref USB_Descriptor_Endpoint_t for the version of this define with non-standard LUFA specific + * element names + */ + typedef struct + { + uint8_t bLength; /**< Size of the descriptor, in bytes. */ + uint8_t bDescriptorType; /**< Type of the descriptor, either a value in \ref USB_DescriptorTypes_t or a value + * given by the specific class. + */ + uint8_t bEndpointAddress; /**< Logical address of the endpoint within the device + * for the current configuration, including direction + * mask. + */ + uint8_t bmAttributes; /**< Endpoint attributes, comprised of a mask of the + * endpoint type (EP_TYPE_*) and attributes (ENDPOINT_ATTR_*) + * masks. + */ + uint16_t wMaxPacketSize; /**< Size of the endpoint bank, in bytes. This indicates the + * maximum packet size that the endpoint can receive at a time. + */ + uint8_t bInterval; /**< Polling interval in milliseconds for the endpoint + * if it is an INTERRUPT or ISOCHRONOUS type. + */ + } USB_StdDescriptor_Endpoint_t; /** Type define for a standard string descriptor. Unlike other standard descriptors, the length * of the descriptor for placement in the descriptor header must be determined by the \ref USB_STRING_LEN() @@ -451,33 +536,59 @@ * This structure should also be used for string index 0, which contains the supported language IDs for * the device as an array. * - * \note The non-standard structure element names are documented here. If the - * USE_NONSTANDARD_DESCRIPTOR_NAMES token is not set, this structure contains elements - * with names identical to those listed in the USB standard. + * This structure uses LUFA-specific element names to make each element's purpose clearer. + * + * \see \ref USB_StdDescriptor_String_t for the version of this define with standard element names */ typedef struct { - #if defined(USE_NONSTANDARD_DESCRIPTOR_NAMES) || defined(__DOXYGEN__) USB_Descriptor_Header_t Header; /**< Descriptor header, including type and size. */ - int16_t UnicodeString[]; /**< String data, as unicode characters (alternatively, - * string language IDs). If normal ASCII characters are - * to be used, they must be added as an array of characters - * rather than a normal C string so that they are widened to - * Unicode size. - * - * Under GCC, strings prefixed with the "L" character (before - * the opening string quotation mark) are considered to be - * Unicode strings, and may be used instead of an explicit - * array of ASCII characters. - */ - #else - uint8_t bLength; - uint8_t bDescriptorType; - int16_t bString[]; - #endif + int16_t UnicodeString[]; /**< String data, as unicode characters (alternatively, + * string language IDs). If normal ASCII characters are + * to be used, they must be added as an array of characters + * rather than a normal C string so that they are widened to + * Unicode size. + * + * Under GCC, strings prefixed with the "L" character (before + * the opening string quotation mark) are considered to be + * Unicode strings, and may be used instead of an explicit + * array of ASCII characters. + */ } USB_Descriptor_String_t; + /** Type define for a standard string descriptor. Unlike other standard descriptors, the length + * of the descriptor for placement in the descriptor header must be determined by the \ref USB_STRING_LEN() + * macro rather than by the size of the descriptor structure, as the length is not fixed. + * + * This structure should also be used for string index 0, which contains the supported language IDs for + * the device as an array. + * + * This structure uses the relevant standard's given element names to ensure compatibility with the standard. + * + * \see \ref USB_Descriptor_String_t for the version of this define with with non-standard LUFA specific + * element names + */ + typedef struct + { + uint8_t bLength; /**< Size of the descriptor, in bytes. */ + uint8_t bDescriptorType; /**< Type of the descriptor, either a value in + * \ref USB_DescriptorTypes_t or a value + * given by the specific class. + */ + int16_t bString[]; /**< String data, as unicode characters (alternatively, + * string language IDs). If normal ASCII characters are + * to be used, they must be added as an array of characters + * rather than a normal C string so that they are widened to + * Unicode size. + * + * Under GCC, strings prefixed with the "L" character (before + * the opening string quotation mark) are considered to be + * Unicode strings, and may be used instead of an explicit + * array of ASCII characters. + */ + } USB_StdDescriptor_String_t; + /* Private Interface - For use in library only: */ #if !defined(__DOXYGEN__) /* Macros: */