issuing eraseuicr from openocd

RE: issuing eraseuicr from openocd

wlp — Thu, 31 Oct 2024 00:32:06 GMT

Thanks Vidar. Please feel free to close this issue.

RE: issuing eraseuicr from openocd

Vidar Berg — Wed, 30 Oct 2024 07:48:15 GMT

Unfortunately, I'm not familiar with this project, but in our SDK examples, the application address will automatically default to 0x0 if the build does not include any bootloaders. It will likely be easier to test different configurations if you do a local install.

RE: issuing eraseuicr from openocd

wlp — Tue, 29 Oct 2024 18:38:06 GMT

Thanks so much for the reply. I did not change the application start address. I'm not sure how to do so in the zmk GitHub action I've been using to build... I may have to do a local install

RE: issuing eraseuicr from openocd

Vidar Berg — Mon, 21 Oct 2024 11:59:01 GMT

Hi,

[quote user="wlp"]from the Nordic website, it seems that eraseuicr is not a part of the ap register? Is it possible to set this in some other way? [/quote]

Correct, it is not a part of the AP registers. If you want to only erase the UICR, you need to write to the NVMC registers, first NVMC.CONFIG to enable erase, then NVMC.ERASEUICR to start the UICR erase. Performing the ERASEALL through the control access port (nrf52.dap apreg 1 0x04 0x01`) will erase both the FLASH and UICR.

[quote user="wlp"]I believe the application has been built correctly as when I flash a boatloader and then the application from the same build in uf2 format, it works as expected.[/quote]

Did you change the application's start address to 0x0 when programming it without the bootloader?

Best regards,

Vidar

RE: issuing eraseuicr from openocd

wlp — Mon, 21 Oct 2024 02:31:25 GMT

Upon examination of the Debug and Trace section of the nRF52840 Product Specification
from the Nordic website, it seems that eraseuicr is not a part of the ap register? Is it possible to set this in some other way?

I ran `nrf52.dap apreg 1 0x04 0x01`, and then flashed the application without a boot loader, but the application doesn't seem to boot, despite flashing verifying as successful in both hex and bin formats. I believe the application has been built correctly as when I flash a boatloader and then the application from the same build in uf2 format, it works as expected.