Porting s140 from nRF52840 to nRF52833

RE: Porting s140 from nRF52840 to nRF52833

FM37 — Tue, 03 Aug 2021 08:30:39 GMT

Hi Jørgen,

That works perfectly after a little RAM_START change to adapt. Changing all the previous steps as well as the backend did the trick since I am using the same softdevice.

Thank you very much for the help !

RE: Porting s140 from nRF52840 to nRF52833

Jørgen Holmefjord — Mon, 02 Aug 2021 11:18:58 GMT

Hi,

There is a few additional things that needs to be changed in the ble_app_hrs example when moving from nRF52840 to nRF52833.

RAM and Flash size is halved in nRF52833, so you need to reduce the size accordingly.
nRF52833 does not have HW Cryptocell peripheral. You need to change the crypto backend crom CC310 to one of the software backends.

Here is a diff of the changes in emProject and sdk_config.h files:

Best regards,
Jørgen

RE: Porting s140 from nRF52840 to nRF52833

FM37 — Tue, 27 Jul 2021 07:37:03 GMT

Hi,

I am bumping this post since it has been a few days. Creating a new project and changing only the two parameters mentionned previously is not enough for the code to work as I still get a hardfault.

What should I change as well to make it work on pca10100 ?

Best regards,

RE: Porting s140 from nRF52840 to nRF52833

FM37 — Thu, 22 Jul 2021 12:12:56 GMT

[quote userid="73427" url="~/f/nordic-q-a/77688/porting-s140-from-nrf52840-to-nrf52833/321311#321311"]I don't think you need to replace the ses_startup files.[/quote]

That's what I thought but I tried it nonetheless seeing it was not working.

[quote userid="73427" url="~/f/nordic-q-a/77688/porting-s140-from-nrf52840-to-nrf52833/321311#321311"]Did you tried changing only the things I wrote in my answer?[/quote]

That is exactly what I did first with modifying anything else but I was still getting a hardfault, so I tried other things after what you told me to do.

[quote userid="73427" url="~/f/nordic-q-a/77688/porting-s140-from-nrf52840-to-nrf52833/321311#321311"] What do you mean by that?[/quote]

What I meant was that I was still getting a hardfault (stopped by vector catch).

Anything else I could try ?

RE: Porting s140 from nRF52840 to nRF52833

Marjeris Romero — Thu, 22 Jul 2021 11:03:39 GMT

HI,

I don't think you need to replace the ses_startup files.

The first picture it looks like you are changing the debug parameters but not the preprocessor defines?

Did you tried changing only the things I wrote in my answer?

[quote user="FM37"]It does not work as well.[/quote]

What do you mean by that?

RE: Porting s140 from nRF52840 to nRF52833

FM37 — Thu, 22 Jul 2021 07:20:03 GMT

Hi Marjeris,

I just tried this with an unmodified copy of ble_app_hrs example with touching anything else. It does not work as well. After that I tried to change the debugger parameters as well, ended up with a hardfault error as well.

After that I tried to replace again ses_startup_nrf52840.s and system_nrf52840.c by the nrf52833 versions (though it might not useful), but I obviously got a huge list of errors:

Any thoughts on what needs modifying as well ?

Best regards,

RE: Porting s140 from nRF52840 to nRF52833

Marjeris Romero — Wed, 21 Jul 2021 09:14:33 GMT

Hi,

Try again from a clean copy of the ble_app_hrs example for PCA10056 and follow these steps:

Open the project options by right clicking "Project 'ble_app_hrs_pca10056_s140'" in the drop-down menu.
Change your configuration from Release to Common.
Change to the following preprocessor definitions, BOARD_PCA10100 and nRF52833_XXAA.
No need to change FLASH START/SIZE since using the same Softdevice.

That should be it.

Best regards,

Marjeris