Add known issues to the documentation.

[pub/USBasp.git] / Bootloaders / CDC / BootloaderCDC.txt

diff --git a/Bootloaders/CDC/BootloaderCDC.txt b/Bootloaders/CDC/BootloaderCDC.txt
index 81e454d..618b95d 100644 (file)
--- a/Bootloaders/CDC/BootloaderCDC.txt
+++ b/Bootloaders/CDC/BootloaderCDC.txt
@@ -47,44 +47,112 @@
  *  This bootloader enumerates to the host as a CDC Class device (virtual serial port), allowing for AVR109
  *  protocol compatible programming software to load firmware onto the AVR.
  *
  *  This bootloader enumerates to the host as a CDC Class device (virtual serial port), allowing for AVR109
  *  protocol compatible programming software to load firmware onto the AVR.
  *

- *  Out of the box this bootloader builds for the USB1287, and will 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.
+ *  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.

  *
  *

- *  This bootloader is compatible with the open source application AVRDUDE, or Atmel's AVRPROG.
+ *  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_Installation Driver Installation

  *
  *  After running this bootloader for the first time on a new computer, you will need to supply the .INF
  *  file located in this bootloader project's directory as the device's driver when running under Windows.
  *  This will enable Windows to use its inbuilt CDC drivers, negating the need for custom drivers for the
  *  device. Other Operating Systems should automatically use their own inbuilt CDC-ACM drivers.
  *
  *
  *  After running this bootloader for the first time on a new computer, you will need to supply the .INF
  *  file located in this bootloader project's directory as the device's driver when running under Windows.
  *  This will enable Windows to use its inbuilt CDC drivers, negating the need for custom drivers for the
  *  device. Other Operating Systems should automatically use their own inbuilt CDC-ACM drivers.
  *

+ *  \section Sec_HostApp Host Controller Application
+ *
+ *  This bootloader is compatible with the open source application AVRDUDE, Atmel's AVRPROG, or other
+ *  applications implementing the AVR109 protocol, which is documented on the Atmel website as an application
+ *  note.
+ *
+ *  \subsection SSec_AVRDude AVRDUDE (Windows, Mac, Linux)
+ *
+ *  AVRDude is a free, cross-platform and open source command line programmer for Atmel and third party AVR
+ *  programmers. It is available on the the Windows platform as part of the "WinAVR" package, or on other systems
+ *  either from a build from the official source code, or in many distributions as a precompiled binary package.
+ *
+ *  To load a new HEX file with AVRDude, specify "AVR109" as the programmer, with the allocated COM port. On Windows
+ *  platforms this will be a COMx port name:
+ *  \code
+ *  avrdude -c AVR109 -p at90usb1287 -P COM0 -U flash:w:Mouse.hex
+ *  \endcode
+ *
+ *  On Linux systems, this will typically be a /dev/ttyACMx port name:
+ *  \code
+ *  avrdude -c AVR109 -p at90usb1287 -P /dev/ttyACM0 -U flash:w:Mouse.hex
+ *  \endcode
+ *
+ *  Refer to the AVRDude project documentation for additional usage instructions.
+ *
+ *  \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.
+ *
+ *  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_CALL(Index)        (void*)(((FLASHEND - 32) + (2 * Index)) / 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   (FLASHEND - 2)
+ *  #define BOOTLOADER_MAGIC_SIGNATURE         0xDCFB
+ *
+ *  #define BOOTLOADER_CLASS_SIGNATURE_START   (FLASHEND - 4)
+ *  #define BOOTLOADER_CDC_SIGNATURE           0xCDC1
+ *
+ *  #define BOOTLOADER_ADDRESS_START           (FLASHEND - 8)
+ *  #define BOOTLOADER_ADDRESS_LENGTH          4
+ *  \endcode
+ *
+ *  Bootloaders reporting a device release revision number of 1.00 or greater are bootloader API enabled. 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_CDC_SIGNATURE.
+ *  The start address of the bootloader can be retrieved by reading the bytes of FLASH memory starting from address \c BOOTLOADER_ADDRESS_START.
+ *

  *  \section Sec_Options Project Options
  *
  *  The following defines can be found in this demo, which can control the demo behaviour when defined, or changed in value.
  *
  *  <table>
  *   <tr>
  *  \section Sec_Options Project Options
  *
  *  The following defines can be found in this demo, which can control the demo behaviour when defined, or changed in value.
  *
  *  <table>
  *   <tr>

+ *    <td><b>Define Name:</b></td>
+ *    <td><b>Location:</b></td>
+ *    <td><b>Description:</b></td>
+ *   </tr>
+ *   <tr>

  *    <td>NO_BLOCK_SUPPORT</td>
  *    <td>Makefile LUFA_OPTS</td>
  *    <td>Define to disable memory block read/write support in the bootloader, requiring all reads and writes to be made
  *    <td>NO_BLOCK_SUPPORT</td>
  *    <td>Makefile LUFA_OPTS</td>
  *    <td>Define to disable memory block read/write support in the bootloader, requiring all reads and writes to be made

- *        using the byte-level commands.
+ *        using the byte-level commands.</td>

  *   </tr>
  *   <tr>
  *    <td>NO_EEPROM_BYTE_SUPPORT</td>
  *    <td>Makefile LUFA_OPTS</td>
  *    <td>Define to disable EEPROM memory byte read/write support in the bootloader, requiring all EEPROM reads and writes
  *   </tr>
  *   <tr>
  *    <td>NO_EEPROM_BYTE_SUPPORT</td>
  *    <td>Makefile LUFA_OPTS</td>
  *    <td>Define to disable EEPROM memory byte read/write support in the bootloader, requiring all EEPROM reads and writes

- *        to be made using the block-level commands.
+ *        to be made using the block-level commands.</td>

  *   </tr>
  *   <tr>
  *    <td>NO_FLASH_BYTE_SUPPORT</td>
  *    <td>Makefile LUFA_OPTS</td>
  *    <td>Define to disable FLASH memory byte read/write support in the bootloader, requiring all FLASH reads and writes
  *   </tr>
  *   <tr>
  *    <td>NO_FLASH_BYTE_SUPPORT</td>
  *    <td>Makefile LUFA_OPTS</td>
  *    <td>Define to disable FLASH memory byte read/write support in the bootloader, requiring all FLASH reads and writes

- *        to be made using the block-level commands.
+ *        to be made using the block-level commands.</td>

  *   </tr>
  *   <tr>
  *    <td>NO_LOCK_BYTE_WRITE_SUPPORT</td>
  *    <td>Makefile LUFA_OPTS</td>
  *   </tr>
  *   <tr>
  *    <td>NO_LOCK_BYTE_WRITE_SUPPORT</td>
  *    <td>Makefile LUFA_OPTS</td>

- *    <td>Define to disable lock byte write support in the bootloader, preventing the lock bits from being set progmatically.
+ *    <td>Define to disable lock byte write support in the bootloader, preventing the lock bits from being set programmatically.</td>

  *   </tr>
  *  </table>
  */
  *   </tr>
  *  </table>
  */