Possible to write to flash in the app error handler?

RE: Possible to write to flash in the app error handler?

Richard D. — Tue, 18 Dec 2018 22:15:52 GMT

The GPREGRET registers are available if your data fits in 16 bits (2x8)

RE: Possible to write to flash in the app error handler?

pablitorun — Tue, 18 Dec 2018 16:59:34 GMT

I was able to get it to work following the instructions here

https://devzone.nordicsemi.com/f/nordic-q-a/33530/ram-variables-exchange-between-bootloader-and-application

The key seemed to be making sure it was in it's own section and page for both the bootloader and app. Not sure why that would matter, but I am for sure not an expert on the linker.

RE: Possible to write to flash in the app error handler?

awneil — Tue, 18 Dec 2018 00:58:41 GMT

Never tried it with a bootloader.

I guess you'd need to make sure that neither the bootloader nor the app cleared the "persistent" area ... ?

RE: Possible to write to flash in the app error handler?

pablitorun — Tue, 18 Dec 2018 00:12:07 GMT

Yeah I was wondering if that would be the best, having trouble getting that working with the bootloader however.

Without the bootloader it seems to work great.

RE: Possible to write to flash in the app error handler?

awneil — Mon, 17 Dec 2018 22:36:59 GMT

Save the stuff to a RAM area that doesn't get initialised at startup, then do a reset.

When the code re-starts, save the stuff from RAM to Flash ...