From fd9b34aac48ad969b9ef9e4a9d7120ae924cec39 Mon Sep 17 00:00:00 2001 From: Dean Camera <dean@fourwalledcubicle.com> Date: Fri, 30 Jul 2010 05:13:05 +0000 Subject: [PATCH] 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 | 8 +++++--- Bootloaders/DFU/makefile | 8 +++++--- 2 files changed, 10 insertions(+), 6 deletions(-) diff --git a/Bootloaders/CDC/makefile b/Bootloaders/CDC/makefile index d39d2b21d..cb05e0fbc 100644 --- a/Bootloaders/CDC/makefile +++ b/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 -# in the AVRStudio fuse programming dialogue uses word addresses, which will have to be -# doubled to obtain the starting byte address of the bootloader section. +# Starting byte address of the bootloader, as a byte address - computed via the formula +# BOOT_START = ((TOTAL_FLASH_BYTES - BOOTLOADER_SECTION_SIZE_BYTES) * 1024) +# +# 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 diff --git a/Bootloaders/DFU/makefile b/Bootloaders/DFU/makefile index e53fca678..dc516c314 100644 --- a/Bootloaders/DFU/makefile +++ b/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 -# in the AVRStudio fuse programming dialogue uses word addresses, which will have to be -# doubled to obtain the starting byte address of the bootloader section. +# Starting byte address of the bootloader, as a byte address - computed via the formula +# BOOT_START = ((TOTAL_FLASH_BYTES - BOOTLOADER_SECTION_SIZE_BYTES) * 1024) +# +# 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 -- GitLab