Added additional bootloader API data to expose the bootloader start address and class to the DFU and CDC class bootloaders.

3 files changed, 29 insertions, 16 deletions

diff --git a/Bootloaders/CDC/BootloaderAPITable.S b/Bootloaders/CDC/BootloaderAPITable.S
index b1d1b0571..1ad8e28d1 100644
--- a/Bootloaders/CDC/BootloaderAPITable.S
+++ b/Bootloaders/CDC/BootloaderAPITable.S
@@ -43,6 +43,10 @@ BootloaderAPI_JumpTable:
 	rjmp BootloaderAPI_ReadLock
 	rjmp BootloaderAPI_WriteLock
 
-; Bootloader table signature
+; Bootloader table signatures and information
+.org 24
+	.long BOOT_START_ADDR ; Start address of the bootloader
+.org 28
+	.word 0xCDC1 ; Signature for the CDC class bootloader, V1
 .org 30
-	.word 0xDCFB
+	.word 0xDCFB ; Signature for a LUFA class bootloader
diff --git a/Bootloaders/CDC/BootloaderCDC.txt b/Bootloaders/CDC/BootloaderCDC.txt
index a3027a9f2..d6ab94516 100644
--- a/Bootloaders/CDC/BootloaderCDC.txt
+++ b/Bootloaders/CDC/BootloaderCDC.txt
@@ -95,22 +95,31 @@
  *  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_SIG_START               (FLASHEND - 32)
- *  #define BOOTLOADER_SIGNATURE               0xDCFB
+ *  #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_SIG_START
- *  and comparing them to the value \c BOOTLOADER_SIGNATURE.
+ *  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
  *
diff --git a/Bootloaders/CDC/makefile b/Bootloaders/CDC/makefile
index 67f8ec364..9f437d751 100644
--- a/Bootloaders/CDC/makefile
+++ b/Bootloaders/CDC/makefile
@@ -207,7 +207,7 @@ CDEFS += $(LUFA_OPTS)
 ADEFS  = -DF_CPU=$(F_CPU)
 ADEFS += -DF_USB=$(F_USB)UL
 ADEFS += -DBOARD=BOARD_$(BOARD)
-ADEFS += -DBOOT_START_ADDR=$(BOOT_START)UL
+ADEFS += -DBOOT_START_ADDR=$(BOOT_START)
 ADEFS += $(LUFA_OPTS)