*
* The following list indicates what microcontrollers are compatible with this demo.
*
- * - Series 7 USB AVRs (AT90USBxxx7)
- * - Series 6 USB AVRs (AT90USBxxx6)
- * - Series 4 USB AVRs (ATMEGAxxU4)
- * - Series 2 USB AVRs (AT90USBxx2, ATMEGAxxU2)
+ * \li Series 7 USB AVRs (AT90USBxxx7)
+ * \li Series 6 USB AVRs (AT90USBxxx6)
+ * \li Series 4 USB AVRs (ATMEGAxxU4) - <i>See \ref SSec_Aux_Space</i>
+ * \li Series 2 USB AVRs (AT90USBxx2, ATMEGAxxU2) - <i>See \ref SSec_Aux_Space</i>
*
* \section Sec_Info USB Information:
*
* <td>USBIF DFU Class Standard, Atmel USB Bootloader Datasheet</td>
* </tr>
* <tr>
- * <td><b>Usable Speeds:</b></td>
- * <td>Full Speed Mode</td>
+ * <td><b>Supported USB Speeds:</b></td>
+ * <td>Low Speed Mode \n
+ * Full Speed Mode</td>
* </tr>
* </table>
*
* This bootloader enumerates to the host as a DFU Class device, allowing for DFU-compatible programming
* software to load firmware onto the AVR.
*
- * This bootloader is compatible with Atmel's FLIP application. However, it requires the use of Atmel's
- * DFU drivers. You will need to install Atmel's DFU drivers prior to using this bootloader. If you are
- * using a 64 bit Windows OS, you will need to either disable the driver signing requirement (see online
- * tutorials for details) or use a digitally signed version of the official Atmel driver provided by a
- * third party AVR user at
- * <a>http://www.avrfreaks.net/index.php?module=Freaks%20Academy&func=viewItem&item_id=2196&item_type=project</a>.
+ * Out of the box this bootloader builds for the AT90USB1287 with an 8KB bootloader section size, and will fit
+ * into 4KB of bootloader space. If you wish to alter this size and/or change the AVR model, you will need to
+ * edit the MCU, FLASH_SIZE_KB and BOOT_SECTION_SIZE_KB values in the accompanying makefile.
+ *
+ * When the bootloader is running, the board's LED(s) will flash at regular intervals to distinguish the
+ * bootloader from the normal user application.
+ *
+ * \section Sec_Running Running the Bootloader
+ *
+ * On the USB AVR8 devices, setting the \c HWBE device fuse will cause the bootloader to run if the \c HWB pin of
+ * the AVR is grounded when the device is reset.
+ *
+ * The are two behaviours of this bootloader, depending on the device's fuses:
*
- * As an open-source option, this bootloader is also compatible with the Linux Atmel USB DFU Programmer
- * software, available for download at <a>http://sourceforge.net/projects/dfu-programmer/</a>.
+ * <b>If the device's BOOTRST fuse is set</b>, the bootloader will run any time the system is reset from
+ * the external reset pin, unless no valid user application has been loaded. To initiate the bootloader, the
+ * device's external reset pin should be grounded momentarily.
*
- * If SECURE_MODE is defined as true, upon start-up the bootloader will be locked, with only the chip erase
- * function available (similar to Atmel's DFU bootloader). If SECURE_MODE is defined as false, all functions
- * are usable on start-up without the prerequisite firmware erase.
+ * <b>If the device's BOOTRST fuse is not set</b>, the bootloader will run only if initiated via a software
+ * jump, or if the \c HWB pin was low during the last device reset (if the \c HWBE fuse is set).
*
- * Out of the box this bootloader builds for the USB1287, and should fit into 4KB of bootloader space. If
- * you wish to enlarge this space and/or change the AVR model, you will need to edit the BOOT_START and MCU
- * values in the accompanying makefile.
+ * For board specific exceptions to the above, see below.
+ *
+ * \subsection SSec_XPLAIN Atmel Xplain Board
+ * Ground the USB AVR JTAG's \c TCK pin to ground when powering on the board to start the bootloader. This assumes the
+ * \c HWBE fuse is cleared and the \c BOOTRST fuse is set as the HWBE pin is not user accessible on this board.
+ *
+ * \subsection SSec_Leonardo Arduino Leonardo Board
+ * Ground \c IO13 when powering the board to start the bootloader. This assumes the \c HWBE fuse is cleared and the
+ * \c BOOTRST fuse is set as the HWBE pin is not user accessible on this board.
+ *
+ * \section Sec_Installation Driver Installation
+ *
+ * This bootloader is designed to be compatible with Atmel's provided Windows DFU class drivers. You will need to
+ * install Atmel's DFU drivers prior to using this bootloader on Windows platforms. If you are using a 64 bit Windows
+ * OS, you will need to either disable the driver signing requirement (see online tutorials for details) or use a
+ * digitally signed version of the official Atmel driver provided by a third party AVR user at
+ * <a>http://www.avrfreaks.net/index.php?module=Freaks%20Academy&func=viewItem&item_id=2196&item_type=project</a>.
*
- * <b>NOTE:</b> This device spoofs Atmel's DFU Bootloader USB VID and PID so that the Atmel DFU bootloader
- * drivers included with FLIP will work. If you do not wish to use Atmel's ID codes, please
- * manually change them in Descriptors.c and alter your driver's INF file accordingly.
+ * \note This device spoofs Atmel's DFU Bootloader USB VID and PID so that the Atmel DFU bootloader
+ * drivers included with FLIP will work. If you do not wish to use Atmel's ID codes, please
+ * manually change them in Descriptors.c and alter your driver's INF file accordingly.
+ *
+ * \section Sec_HostApp Host Controller Application
+ *
+ * This bootloader is compatible with Atmel's FLIP utility on Windows machines, and dfu-programmer on Linux machines.
+ *
+ * \subsection SSec_FLIP FLIP (Windows)
+ *
+ * FLIP (Flexible In-System Programmer) is a utility written by Atmel, and distributed for free on the Atmel website.
+ * The FLIP utility is designed to assist in the bootloader programming of a range of Atmel devices, through several
+ * popular physical interfaces including USB. It is written in Java, however makes use of native extensions for USB
+ * support and thus is only offered on Windows.
+ *
+ * To program a device using FLIP, refer to the Atmel FLIP documentation.
+ *
+ * \subsection SSec_DFUProgrammer dfu-programmer (Linux)
+ *
+ * dfu-programmer is an open-source command line solution for the bootloader programming of Atmel devices through a
+ * USB connection, using the DFU protocol, available for download at <a>http://sourceforge.net/projects/dfu-programmer/</a>.
+ *
+ * The following example loads a HEX file into the AVR's FLASH memory using dfu-programmer:
+ * \code
+ * dfu-programmer at90usb1287 erase flash Mouse.hex
+ * \endcode
+ *
+ * \section Sec_API User Application API
+ *
+ * Several user application functions for FLASH and other special memory area manipulations are exposed by the bootloader,
+ * allowing the user application to call into the bootloader at runtime to read and write FLASH data.
+ *
+ * \warning The APIs exposed by the DFU class bootloader are \b NOT compatible with the API exposed by the official Atmel DFU bootloader.
+ *
+ * By default, the bootloader API jump table is located 32 bytes from the end of the device's FLASH memory, and follows the
+ * following layout:
+ *
+ * \code
+ * #define BOOTLOADER_API_TABLE_SIZE 32
+ * #define BOOTLOADER_API_TABLE_START ((FLASHEND + 1UL) - BOOTLOADER_API_TABLE_SIZE)
+ * #define BOOTLOADER_API_CALL(Index) (void*)((BOOTLOADER_API_TABLE_START + (Index * 2)) / 2)
+ *
+ * void (*BootloaderAPI_ErasePage)(uint32_t Address) = BOOTLOADER_API_CALL(0);
+ * void (*BootloaderAPI_WritePage)(uint32_t Address) = BOOTLOADER_API_CALL(1);
+ * void (*BootloaderAPI_FillWord)(uint32_t Address, uint16_t Word) = BOOTLOADER_API_CALL(2);
+ * uint8_t (*BootloaderAPI_ReadSignature)(uint16_t Address) = BOOTLOADER_API_CALL(3);
+ * uint8_t (*BootloaderAPI_ReadFuse)(uint16_t Address) = BOOTLOADER_API_CALL(4);
+ * uint8_t (*BootloaderAPI_ReadLock)(void) = BOOTLOADER_API_CALL(5);
+ * void (*BootloaderAPI_WriteLock)(uint8_t LockBits) = BOOTLOADER_API_CALL(6);
+ *
+ * #define BOOTLOADER_MAGIC_SIGNATURE_START (BOOTLOADER_API_TABLE_START + (BOOTLOADER_API_TABLE_SIZE - 2))
+ * #define BOOTLOADER_MAGIC_SIGNATURE 0xDCFB
+ *
+ * #define BOOTLOADER_CLASS_SIGNATURE_START (BOOTLOADER_API_TABLE_START + (BOOTLOADER_API_TABLE_SIZE - 4))
+ * #define BOOTLOADER_DFU_SIGNATURE 0xDF10
+ *
+ * #define BOOTLOADER_ADDRESS_START (BOOTLOADER_API_TABLE_START + (BOOTLOADER_API_TABLE_SIZE - 8))
+ * #define BOOTLOADER_ADDRESS_LENGTH 4
+ * \endcode
+ *
+ * From the application the API support of the bootloader can be detected by reading the FLASH memory bytes located at address
+ * \c BOOTLOADER_MAGIC_SIGNATURE_START and comparing them to the value \c BOOTLOADER_MAGIC_SIGNATURE. The class of bootloader
+ * can be determined by reading the FLASH memory bytes located at address \c BOOTLOADER_CLASS_SIGNATURE_START and comparing them
+ * to the value \c BOOTLOADER_DFU_SIGNATURE. The start address of the bootloader can be retrieved by reading the bytes of FLASH
+ * memory starting from address \c BOOTLOADER_ADDRESS_START.
+ *
+ * \subsection SSec_API_MemLayout Device Memory Map
+ * The following illustration indicates the final memory map of the device when loaded with the bootloader.
+ *
+ * \verbatim
+ * +----------------------------+ 0x0000
+ * | |
+ * | |
+ * | |
+ * | |
+ * | |
+ * | |
+ * | |
+ * | |
+ * | User Application |
+ * | |
+ * | |
+ * | |
+ * | |
+ * | |
+ * | |
+ * | |
+ * | |
+ * +----------------------------+ FLASHEND - BOOT_AUX_SECTION_SIZE
+ * | Booloader Start Trampoline |
+ * | (Not User App. Accessible) |
+ * +----------------------------+ FLASHEND - (BOOT_AUX_SECTION_SIZE - 4)
+ * | |
+ * | Auxillery Bootloader |
+ * | Space for Smaller Devices |
+ * | (Not User App. Accessible) |
+ * | |
+ * +----------------------------+ FLASHEND - BOOT_SECTION_SIZE
+ * | |
+ * | Bootloader Application |
+ * | (Not User App. Accessible) |
+ * | |
+ * +----------------------------+ FLASHEND - 96
+ * | API Table Trampolines |
+ * | (Not User App. Accessible) |
+ * +----------------------------+ FLASHEND - 32
+ * | Bootloader API Table |
+ * | (User App. Accessible) |
+ * +----------------------------+ FLASHEND - 8
+ * | Bootloader ID Constants |
+ * | (User App. Accessible) |
+ * +----------------------------+ FLASHEND
+ * \endverbatim
+ *
+ * \subsection SSec_Aux_Space Auxiliary Bootloader Section
+ * To make the bootloader function on smaller devices (those with a physical
+ * bootloader section of smaller than 6KB)
+ *
+ * \section Sec_KnownIssues Known Issues:
+ *
+ * \par On Linux machines, the DFU bootloader is inaccessible.
+ * On many Linux systems, non-root users do not have automatic access to newly
+ * inserted DFU devices. Root privileges or a UDEV rule is required to gain
+ * access.
+ * See <a href=https://groups.google.com/d/msg/lufa-support/CP9cy2bc8yo/kBqsOu-RBeMJ>here</a> for resolution steps.
*
* \section Sec_Options Project Options
*
*
* <table>
* <tr>
- * <td><b>Define Name:</b></td>
- * <td><b>Location:</b></td>
- * <td><b>Description:</b></td>
+ * <th><b>Define Name:</b></th>
+ * <th><b>Location:</b></th>
+ * <th><b>Description:</b></th>
* </tr>
* <tr>
* <td>SECURE_MODE</td>
- * <td>BootloaderDFU.h</td>
- * <td>If defined to true, the bootloader will not accept any memory commands other than a chip erase on start-up, until an
+ * <td>AppConfig.h</td>
+ * <td>If defined to \c true, the bootloader will not accept any memory commands other than a chip erase on start-up, until an
* erase has been performed. This can be used in conjunction with the AVR's lockbits to prevent the AVRs firmware from
- * being dumped by unauthorized persons.</td>
+ * being dumped by unauthorized persons. When false, all memory operations are allowed at any time.</td>
* </tr>
* </table>
*/
projects / pub / lufa.git / blobdiff