nRF52820 USB CDC ACM example. Linker issue?

RE: nRF52820 USB CDC ACM example. Linker issue?

Håkon Alseth — Fri, 27 Aug 2021 12:12:04 GMT

Hi Andreas,

[quote user="Andreas3T"]

That seems to be the same documentation I have linked in my original post except the web address for some reason. This guide does not cover my questions. What I really want to know is:

1. The memory addresses for:
    - uicr_bootloader_start_address
- uicr_mbr_params_page
    - mbr_params_page
    - bootloader_settings_page

[/quote]

My apologies for not explaining better, but SDK v17 has projects for the nRF52820 device example that you're trying to run, where all of this is already handled for you.

If you look at the folder:

../nRF5_SDK_17.0.2_d674dde/examples/dfu/secure_bootloader/pca10100e_usb_debug/armgcc

You will find the linker script and Makefile for the nRF52820 device.

[quote user="Andreas3T"]2. And if these addresses are linked to the warning:
WARNING: A UICR write operation has been requested but UICR has not been
WARNING: erased. Please verify that the result is correct. [/quote]

UICR is a section that is only erased if you're issuing an ERASEALL (ie. "nrfjprog -e -f nrf52").

If you program by erasing sector-by-sector (ie. "nrfjprog --program <hex> --sectorerase -f nrf52"), you cannot erase the UICR section. This means that if it was already populated; it is highly likely that there's a conflict in that region.

Kind regards,

Håkon

RE: nRF52820 USB CDC ACM example. Linker issue?

Andreas3T — Fri, 27 Aug 2021 11:16:20 GMT

The reason I also mentioned the documentation from an older SDK version (16) in the original post is because the latest documentation seem to be lacking.

E.g. Any flags for using hardware fpu must be changed to software fpu or the project won't compile.

RE: nRF52820 USB CDC ACM example. Linker issue?

Andreas3T — Fri, 27 Aug 2021 11:11:03 GMT

That seems to be the same documentation I have linked in my original post except the web address for some reason. This guide does not cover my questions. What I really want to know is:

1. The memory addresses for:
    - uicr_bootloader_start_address
- uicr_mbr_params_page
    - mbr_params_page
    - bootloader_settings_page

2. And if these addresses are linked to the warning:
WARNING: A UICR write operation has been requested but UICR has not been
WARNING: erased. Please verify that the result is correct.

Best Regards, Andreas

RE: nRF52820 USB CDC ACM example. Linker issue?

Håkon Alseth — Fri, 27 Aug 2021 08:52:46 GMT

Hi,

Here's the documentation on how to convert an existing project to nRF52820:

https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/nrf52820_user_guide.html?cp=8_1_5_2

In your case, you do not need to do this, as there should be projects for the "pca10100e" board in SDK v17.

I see that you link to sdk 16, which does not include projects for nRF52820.

Kind regards,

Håkon