X-Git-Url: http://git.linex4red.de/pub/lufa.git/blobdiff_plain/1a4a26271e32fba6e2430b7869ec4a8b4242e6e2..b04de2f2f4bb14c968ebcc765ec93c5d1591aa0d:/Bootloaders/DFU/BootloaderDFU.txt

diff --git a/Bootloaders/DFU/BootloaderDFU.txt b/Bootloaders/DFU/BootloaderDFU.txt
index 94657f355..d0811b2aa 100644
--- a/Bootloaders/DFU/BootloaderDFU.txt
+++ b/Bootloaders/DFU/BootloaderDFU.txt
@@ -94,22 +94,38 @@
  *  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.
  *
- *  \note The APIs exposed by the DFU class bootloader are \b NOT compatible with the API exposed by the official Atmel DFU bootloader.
+ *  \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_START(Index)        (void*)(((FLASHEND - 32) + (2 * Index)) / 2)
- *  void    (*BootloaderAPI_ErasePage)(uint32_t Address)               = BOOTLOADER_API_START(0);
- *  void    (*BootloaderAPI_WritePage)(uint32_t Address)               = BOOTLOADER_API_START(1);
- *  void    (*BootloaderAPI_FillWord)(uint32_t Address, uint16_t Word) = BOOTLOADER_API_START(2);
- *  uint8_t (*BootloaderAPI_ReadSignature)(uint16_t Address)           = BOOTLOADER_API_START(3);
- *  uint8_t (*BootloaderAPI_ReadFuse)(uint16_t Address)                = BOOTLOADER_API_START(4);
- *  uint8_t (*BootloaderAPI_ReadLock)(void)                            = BOOTLOADER_API_START(5);
- *  void    (*BootloaderAPI_WriteLock)(uint8_t LockBits)               = BOOTLOADER_API_START(6);
+ *  #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_DFU_SIGNATURE           0xDFB1
+ *
+ *  #define BOOTLOADER_ADDRESS_START           (FLASHEND - 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_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.