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Code Issues Releases Wiki Activity

Warn when DISABLE_BACKUP is enabled 

F/2257
pull/745/head
Daniele Lacamera 2026-04-08 17:14:00 +02:00
parent fc9e7a3e8a
commit b705ca74ae
2 changed files with 4 additions and 1 deletions
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4
docs/compile.md
View File

@ -193,7 +193,9 @@ To circumvent the compile-time checks on the maximum allowed stack size, use `WO
Optionally, it is possible to disable the backup copy of the current running firmware upon the installation of the
update. This implies that no fall-back mechanism is protecting the target from a faulty firmware installation, but may be useful
in some cases where it is not possible to write on the update partition from the bootloader.
in some cases where it is not possible to write on the update partition from the bootloader. This also removes the
power-fail-safe swap behavior: if power is lost while the update is being copied into the BOOT partition, the original
firmware may already be partially overwritten and the device can be left unrecoverable.
The associated compile-time option is
`DISABLE_BACKUP=1`

1
options.mk
View File

@ -724,6 +724,7 @@ ifeq ($(NVM_FLASH_WRITEONCE),1)
endif
ifeq ($(DISABLE_BACKUP),1)
$(warning DISABLE_BACKUP=1 disables power-fail-safe updates; losing power during an update can leave BOOT partially written and unrecoverable)
CFLAGS+= -D"DISABLE_BACKUP"
endif