SDK 17 DFU upgrade in application over serial transport fails

[Shishir]

Hi Nordic Team,

I am trying DFU upgrade in application over serial transport.

Same as mentioned in nRF_SDK_15.3.0_background_dfu_3 example I got from one of the discussion thread.

While I have been successful in getting it working with SDK 15.3 over nRF52840 DK board as it is downloaded.

But when I used this same with SDK 17.0.0 with minor changes to get it compiling.

It fails/code crash in the code nrf_dfu_settings.c --> settings_write --> nrf_dfu_flash_erase. Trying to erase location 0xff000 I believe.

Can anyone guide how can I proceed to solve this issue or debug further. 

My wild guess based on other conversations over this forum it may have been due to flash protection enabled for this memory location.

I cannot use SDK 15.3 as my application works on SDK 17 and I would not want to backport it to SDK15.3.

Cheers,

Shishir

[Edvin]

Hello Shishir,

What bootloader were you using in SDK15.3.0 for background DFU?

I have no idea what this bootloader looks like, so I don't know why it is not working.

 

It fails/code crash in the code nrf_dfu_settings.c --> settings_write --> nrf_dfu_flash_erase. Trying to erase location 0xff000 I believe.

 How do you know that it crashes there? And what do you mean by crashing? Do you see it in the error handler?

BR,

Edvin

[Shishir]

Hi Edvin,

I am using complete example from link below.

https://devzone.nordicsemi.com/f/nordic-q-a/46994/background-dfu-application-source-code

https://devzone.nordicsemi.com/cfs-file/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-c39136cb1d7c4b7bad35f35fd7d24c96/nRF_5F00_SDK_5F00_15.3.0_5F00_background_5F00_dfu_5F00_3.zip

as per the above thread I am using secure_bootloader example and ble_app_hrs_w_serial_dfu application example.

As it is withe thr SDK 15.3 it works just fine for me.

But when tried to take same thing to SDK 17.0.0 it fails at location I mentioned earlier.

It fails/code crash in the code nrf_dfu_settings.c --> settings_write --> nrf_dfu_flash_erase. 

In debug mode execution never comes out of nrf_dfu_flash_erase() function. When I pause execution it stops at 

.thumb_func
.weak SVC_Handler
SVC_Handler:
b .

Cheers,

Shishir

[Edvin]

Hello,

What does nrf_dfu_flash_erase() return? Do you have the possiblilty to debug? We are a bit short on staffing due to summer holidays in Norway, so I can't dig into your project right now.This call is from your bootloader project, right? Not the application running buttonless_dfu or something?

BR,

Edvin

[Shishir]

Hi Edvin,

Call to nrf_dfu_flash_erase() never returns. It goes into hard fault I guess.

This call is not from bootloader but from sample application ble_app_hrs_w_serial_dfu which someone named vidar from your team created to show case background DFU functionality with serial transport.

I'll try to upload my code post removing my own project specific code first.

Other simpler way can be if you simply take application and bootoader code from example folder of below link and copy into SDK 17 at exactly same location and give it a try.

https://devzone.nordicsemi.com/cfs-file/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-c39136cb1d7c4b7bad35f35fd7d24c96/nRF_5F00_SDK_5F00_15.3.0_5F00_background_5F00_dfu_5F00_3.zip

Cheers,

Shishir 

[Edvin]

Hello Shishir,

I can't just copy an example from one SDK to another. You need to port it. Please see the porting guides in the release notes of the Major SDK releases between 15.3.0 and 17.0.0. Among other things, you need to update the softdevice headers, and there are some softdevice API changes. I can't compile the 15.3.0 projects in SDK17. If you have already ported it, I suggest that you upload the ported version instead of the 15.3.0 version.

I can't do this job for you. If you find it hard to port, I suggest you start by just copying the main.c file and your custom files, from 15.3.0 to 17.0.0 and try to compile. See what changes you need to do from there.

Best regards,

Edvin