Serial DFU with nRF9160 as DFU controller

[esisk]

I'm downloading a firmware image from AWS via cell onto the nRF9160. I want to perform a serial DFU over UART. The DFU target is the nRF52840. Are there any existing samples outlining this process?

[Hung Bui]

Hi Ethan, 

Could you let me know more about what firmware running on the nRF52840 ? 
If it's running NCS , please have a look at this case: https://devzone.nordicsemi.com/support-private/support/269959

ould you try to test using the repo that Simon pointed to in the case. 

Simon is on vacation  but here is the instruction I got from him: 

• cd into <..>\nrf\samples\other\test_lte_uart_dfu_lib and run
  • west build -b nrf52840_pca10090 && west flash
• Set SW5 to nRF91
• cd into <..>\nrf\samples\nrf9160\http_application_update and run
  • west build -b nrf9160_pca10090ns && west flash
• Wait till you see the following log from the 9160: "Press Button 1 to start the FOTA download", then press Button 1 on the 91 DK
• When you see the log "UART DFU transmission complete" in the log from the 9160 and the logging from the 52840 stops up (I forgot to enable log on the 52840 side signifying that the DFU was finished) do the following:
  • Set SW5 to nRF52
  • Press the RESET Button on the 91 DK
• If everything works as expected, you will see the following log:

Text

 *** Booting Zephyr OS build v2.1.99-ncs1 **

[00:00:00.120,208] [1B][0m<inf> mcuboot: Starting bootloader[1B][0m

[00:00:00.126,312] [1B][0m<inf> mcuboot: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3[1B][0m

[00:00:00.136,108] [1B][0m<inf> mcuboot: Boot source: none[1B][0m[00:00:00.141,479] [1B][0m<inf> mcuboot: Swap type: test[1B][0m

[00:00:02.377,655] [1B][0m<inf> mcuboot: Bootloader chainload address offset: 0xc000[1B][0m

[00:00:02.385,162] [1B][0m<inf> mcuboot: Jumping to the first image slot[1B][0m

** Booting Zephyr OS build v2.1.99-ncs1 ***Hello world! nrf52840_pca10090

[esisk]

Hey Hung, I switched our toolchain over to NCS and I was wondering if you could re-answer my original question based on that. I can't view the link you sent in your original response because it's a private ticket.

[Hung Bui]

Hi Ethan, 
I'm sorry that I didn't notice it was a private case. 
So basically it pointed to this repo: https://github.com/plskeggs/sdk-nrf/tree/feature-uart-dfu-v1.4.0

It's an example made from one of our employee. Please use the instruction that I gave earlier. 

[esisk]

Thanks for the link Hung. Is there a way for me to view the source code for lte_uart_dfu.c? I can't find it in the repo and this precooked sample is not useful for me since I'm using a custom board and not DKs. 

[esisk]

Nevermind, I found the file here: sdk-nrf/lib/lte_uart_dfu at feature-uart-dfu-v1.4.0 · plskeggs/sdk-nrf (github.com)