Add the formula used to obtain the bootloader start address to the Bootloader makefiles to help users compute the correct address for each device based on the bootloader section size.

Bootloaders/CDC/makefile

@@ -85,9 +85,11 @@ F_CPU = 8000000
 F_CLOCK = $(F_CPU)
 
 
-# Starting byte address of the bootloader, as a byte address. Note that the address given
+# Starting byte address of the bootloader, as a byte address - computed via the formula
-# in the AVRStudio fuse programming dialogue uses word addresses, which will have to be
+#   BOOT_START = ((TOTAL_FLASH_BYTES - BOOTLOADER_SECTION_SIZE_BYTES) * 1024)
-# doubled to obtain the starting byte address of the bootloader section.
+#
+# Note that the bootloader size and start address given in AVRStudio is in words and not
+# bytes, and so will need to be doubled to obtain the byte address needed by AVR-GCC.
 BOOT_START = 0x1E000
 
 

Bootloaders/DFU/makefile

@@ -85,9 +85,11 @@ F_CPU = 8000000
 F_CLOCK = $(F_CPU)
 
 
-# Starting byte address of the bootloader, as a byte address. Note that the address given
+# Starting byte address of the bootloader, as a byte address - computed via the formula
-# in the AVRStudio fuse programming dialogue uses word addresses, which will have to be
+#   BOOT_START = ((TOTAL_FLASH_BYTES - BOOTLOADER_SECTION_SIZE_BYTES) * 1024)
-# doubled to obtain the starting byte address of the bootloader section.
+#
+# Note that the bootloader size and start address given in AVRStudio is in words and not
+# bytes, and so will need to be doubled to obtain the byte address needed by AVR-GCC.
 BOOT_START = 0x1E000