Yes, I've done similar on another product and it worked well. I have
allowed myself to get blinkered by the plethora of supposedly easy/good
that options u-boot offered.
Note to self: KISS ;-)
On 01/07/2023 18:05, Gregory Nutt wrote:
What I am trying to cater for is the inevitable occasion where a
customer does a firmware update that goes wrong and seems to "brick"
the device, as the "app" nor-flash is corrupted and an in-app updater
can't be run.
Back in the day when I was doing set-top boxes we would support
updating many thousands of boxes via cable overnight. Of course, many
of the updates would fail for some reason or another.
So we kept two copies of the FLASH image in the filesystem: The
newest download and the last known good. On reset, the bootloader
would load the newest download first if is is present; otherwise it
would load the last known good. If the newest download failed to
boot, it was removed (and be updated again the next night). If it
booted successfully, it would mark itself as the "last known good."
That logic is pretty simple and worked well. Lots of other people in
this list have dealt with this and perhaps have developed some better
solutions.
--
Regards,
Tim Hardisty
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