Alternative ways to flash modem firmware

RE: Alternative ways to flash modem firmware

Elfving — Tue, 12 Oct 2021 08:27:55 GMT

Great! Glad to hear it!

[quote user="haricane"]Where is the modem firmware stored on nrf9160? Is there a separate flash for modem, or is it stored on the 1 mb application flash? [/quote]

Yes, it is separate from the application flash. It is on the LTE modem host processor.

Best regards,

Elfving

RE: Alternative ways to flash modem firmware

haricane — Fri, 08 Oct 2021 23:47:10 GMT

Hi Elfving,

Thanks for the response.

I think nrfjprog is great for me. I will use that moving forward.

I dont need more info on the zip file contents.

I do have one follow up question. Where is the modem firmware stored on nrf9160? Is there a separate flash for modem, or is it stored on the 1 mb application flash?

Regards,

Hari

RE: Alternative ways to flash modem firmware

Elfving — Fri, 08 Oct 2021 15:14:04 GMT

Hey Hari!

1) No I don't think so. The process of updating the modem differs a lot from flashing the application code.

2) It mainly includes the image segments (for more info on that, see here) and checksums. (The latest release also includes FOTA test images) I do not know all the details on this however, and could look more into it if you want me to.

3) Yes, with nRF Command Line Tools version 10.13.0 onwards you can use nrfjprog to perform a modem firmware upgrade.

nrfjprog --program <path-to-fw-zip> -s <serial number> --verify

You can check the release notes about it for more info.

Here is also an older python script that can be used to update the modem: nrf-dfu-tool.zip. It might also give you a bit insight into the process of updating it, and what it is that makes it a bit different.

Best regards,

Elfving