Bootloaders/HID/BootloaderHID.txt

   1 /** \file
   2  *
   3  *  This file contains special DoxyGen information for the generation of the main page and other special
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   6
   7 /** \mainpage HID Class USB AVR Bootloader
   8  *
   9  *  \section SSec_Compat Demo Compatibility:
  10  *
  11  *  The following list indicates what microcontrollers are compatible with this demo.
  12  *
  13  *  \li Series 7 USB AVRs (AT90USBxxx7)
  14  *  \li Series 6 USB AVRs (AT90USBxxx6)
  15  *  \li Series 4 USB AVRs (ATMEGAxxU4)
  16  *  \li Series 2 USB AVRs (AT90USBxx2, ATMEGAxxU2)
  17  *
  18  *  \section SSec_Info USB Information:
  19  *
  20  *  The following table gives a rundown of the USB utilization of this demo.
  21  *
  22  * <table>
  23  *  <tr>
  24  *   <td><b>USB Mode:</b></td>
  25  *   <td>Device</td>
  26  *  </tr>
  27  *  <tr>
  28  *   <td><b>USB Class:</b></td>
  29  *   <td>Human Interface Device Class (HID)</td>
  30  *  </tr>
  31  *  <tr>
  32  *   <td><b>USB Subclass:</b></td>
  33  *   <td>N/A</td>
  34  *  </tr>
  35  *  <tr>
  36  *   <td><b>Relevant Standards:</b></td>
  37  *   <td>USBIF HID Class Standard \n
  38  *       Teensy Programming Protocol Specification</td>
  39  *  </tr>
  40  *  <tr>
  41  *   <td><b>Supported USB Speeds:</b></td>
  42  *   <td>Low Speed Mode \n
  43  *       Full Speed Mode</td>
  44  *  </tr>
  45  * </table>
  46  *
  47  *  \section SSec_Description Project Description:
  48  *
  49  *  This bootloader enumerates to the host as a HID Class device, allowing for device FLASH programming through
  50  *  the supplied command line software, which is a modified version of Paul's TeensyHID Command Line loader code
  51  *  from PJRC (used with permission). This bootloader is deliberately non-compatible with the proprietary PJRC
  52  *  HalfKay bootloader GUI; only the command line interface software accompanying this bootloader will work with it.
  53  *
  54  *  Out of the box this bootloader builds for the AT90USB1287 with an 8KB bootloader section size, and will fit
  55  *  into 2KB of bootloader space for the Series 2 USB AVRs (ATMEGAxxU2, AT90USBxx2) or 4KB of bootloader space for
  56  *  all other models. If you wish to alter this size and/or change the AVR model, you will need to edit the MCU,
  57  *  FLASH_SIZE_KB and BOOT_SECTION_SIZE_KB values in the accompanying makefile.
  58  *
  59  *  \warning <b>THIS BOOTLOADER IS NOT SECURE.</b> Malicious entities can recover written data, even if the device
  60  *           lockbits are set.
  61  *
  62  *  \section Sec_Running Running the Bootloader
  63  *
  64  *  This bootloader is designed to be started via the \c HWB mechanism of the USB AVRs; ground the \c HWB pin (see device
  65  *  datasheet) then momentarily ground \c /RESET to start the bootloader. This assumes the \c HWBE fuse is set and the
  66  *  \c BOOTRST fuse is cleared.
  67  *
  68  *  \section Sec_Installation Driver Installation
  69  *
  70  *  This bootloader uses the HID class driver inbuilt into all modern operating systems, thus no additional drivers
  71  *  need to be supplied for correct operation.
  72  *
  73  *  \section Sec_HostApp Host Controller Application
  74  *
  75  *  Due to licensing issues, the supplied bootloader is compatible with the HalfKay bootloader protocol designed
  76  *  by PJRC, but is <b>not compatible with the cross-platform loader GUI</b>. A modified version of the open source
  77  *  cross-platform TeensyLoader application is supplied, which can be compiled under most operating systems. The
  78  *  command-line loader application should remain compatible with genuine Teensy boards in addition to boards using
  79  *  this custom bootloader.
  80  *
  81  *  Once compiled, programs can be loaded into the AVR's FLASH memory through the following example command:
  82  *  \code
  83  *  hid_bootloader_cli -mmcu=at90usb1287 Mouse.hex
  84  *  \endcode
  85  *
  86  *  \section Sec_KnownIssues Known Issues:
  87  *
  88  *  \par After loading an application, it is not run automatically on startup.
  89  *  Some USB AVR boards ship with the \c BOOTRST fuse set, causing the bootloader
  90  *  to run automatically when the device is reset. This booloader requires the
  91  *  \c BOOTRST be disabled and the HWBE fuse used instead to run the bootloader
  92  *  when needed.
  93  *
  94  *  \section SSec_Options Project Options
  95  *
  96  *  The following defines can be found in this demo, which can control the demo behaviour when defined, or changed in value.
  97  *
  98  *  <table>
  99  *   <tr>
 100  *    <td>
 101  *     None
 102  *    </td>
 103  *   </tr>
 104  *  </table>
 105  */