Use libflash in the bootloader

[maxter]

I am trying to use the libflash (or better libquadflash) from inside the bootloader; I have seen there are a number of past threads about accessing the data partition (using the readFlashDataPage function) from the bootloader but none about accessing the image partition; is it possible?

My aim is to create a failsafe mechanism that on boot if the user presses a button long enough it deletes the update images and restarts with the factory image.

[andrewxcav]

It may be possible to do this using a generated bootloader from xflash:
https://www.xmos.com/download/AN00109:- ... .1rc1).pdf

[maxter]

It may be possible to do this using a generated bootloader from xflash:
https://www.xmos.com/download/AN00109:- ... .1rc1).pdf

Thanks for the reply, andrewxcav.
I am aware of that AN and I actually used it to read the IO in order to indicate the boot partition to the bootloader.

What I am looking for is a method to interact with the boot partition of the Flash, which doesn't seem possible at the moment.
In the end I decided to add to the factory image a clean-up function that erases all other boot images so that when I start the system in factory mode via button press, it cleans the other images and let the be replaced by new ones (via DFU).

[andrewxcav]

Ah that is a good idea. I am sure you can manipulate the boot partition, but it might require using low level flash commands vs. the flash lib.

[maxter]

Ah that is a good idea. I am sure you can manipulate the boot partition, but it might require using low level flash commands vs. the flash lib.

That's an interesting idea, though it would tie the bootloader to the Flash model, which I want avoid if possible (hence the ideal usage of the flash libraries).