usbstringdescriptor.h

本代bootloader通过usb下载代码首先存放在sdram中

/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support 
 * ----------------------------------------------------------------------------
 * Copyright (c) 2008, Atmel Corporation
 *
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//------------------------------------------------------------------------------
/// \unit
///
/// !!!Purpose
///
/// Definition of a class for manipulating String descriptors.
//------------------------------------------------------------------------------

#ifndef USBSTRINGDESCRIPTOR_H
#define USBSTRINGDESCRIPTOR_H

//------------------------------------------------------------------------------
//         Definitions
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
/// \page "USB String Descriptor definitions"
///
/// This page lists the codes and macros for USB string descriptor definition.
///
/// !Language IDs
/// - USBStringDescriptor_ENGLISH_US
///
/// !String Descriptor Length
/// - USBStringDescriptor_LENGTH
///
/// !ASCII to UNICODE convertion
/// - USBStringDescriptor_UNICODE

/// Language ID for US english.
#define USBStringDescriptor_ENGLISH_US          0x09, 0x04

/// Calculates the length of a string descriptor given the number of ascii
/// characters/language IDs in it.
/// \param length The ascii format string length.
/// \return The actual data length in bytes.
#define USBStringDescriptor_LENGTH(length)      ((length) * 2 + 2)
/// Converts an ascii character to its unicode representation.
/// \param ascii The ASCII character to convert
/// \return A 2-byte-array for the UNICODE based on given ASCII
#define USBStringDescriptor_UNICODE(ascii)      (ascii), 0
//------------------------------------------------------------------------------

#endif //#ifndef USBSTRINGDESCRIPTOR_H