Add tag for the 120219 release.

[pub/USBasp.git] / Bootloaders / DFU / BootloaderDFU.txt

diff --git a/Bootloaders/DFU/BootloaderDFU.txt b/Bootloaders/DFU/BootloaderDFU.txt
index 94657f3..f7f5ee9 100644 (file)
--- a/Bootloaders/DFU/BootloaderDFU.txt
+++ b/Bootloaders/DFU/BootloaderDFU.txt
@@ -108,8 +108,14 @@
  *  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_SIG_START               (FLASHEND - 32)
+ *  #define BOOTLOADER_SIGNATURE               0xDCFB
  *  \endcode
  *
+ *  From the application the API support of the bootloader can be detected by reading the FLASH memory bytes located at address
+ *  \c BOOTLOADER_SIG_START and comparing them to the value \c BOOTLOADER_SIGNATURE.
+ *
  *  \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.