- riotboot targets should not be needed for riotboot application
so dont include it.
- also fixes#12003 by not setting FLASHFILE = $(RIOTBOOT_EXTENDED_BIN)
when compiling riotboot application
... if the riotboot feature is used.
Previously, even an application that had "FEATURES_REQUIRED += riotboot"
set would still flash the non-riotboot binary on "make flash".
This is usualy not what the user wants.
This commit set's the FLASHFILE variable to the combined "riotboot
bootloader + slot0 + empty slot1" binary. This has the effect that make
all, flash and flash-only will compile and/or flash a working riotboot
setup.
tests/riotboot and tests/riotboot_flashwrite now default to flashing the
riotboot-extended binary. tests/riotboot was previously configured to
use the riotboot-combined binary. This has been changed in order to not
behave differently than how usual riotboot applications do.
A canned recipe had previously been defined to perform the flashing
procedure. The canned recipe is preferred to calling $(FLASHER) $(FFLAGS)
as there might be additional steps involved in flashing (this is handled by
preflash currently but with the canned recipe we will be able to fix it.)
Using 'link' was working too but will introduce a circular dependency
when FLASHFILE is one of the slot files.
This trims down to the minimal required dependency to work. It is now
the same as `ELFFILE` dependencies.
By erasing slot 1 header the slot gets invalidated.
This is very useful while debugging, since we can
force the bootloader to ignore anything on that
slot.
riotboot looks for valid, available slots and compares its
version. The slot with the highest version is booted, otherwise
if no valid slot is found it loops on `while(1);`
riotboot is introduced here and makes use of riotboot_hdr,
which indentifies the images encapsulated as slots.
The slot size and offset is configurable, which makes
slots extendable if needed, e.g. 2 or more slots can be
transparently added.
Co-authored-by: Kaspar Schleiser <kaspar@schleiser.de>
Co-authored-by: Gaëtan Harter <gaetan.harter@fu-berlin.de>
