nrf52833 ble dfu how to start?

[Olfox]

Hi ,

I need to start my application using sdk5 16.0 version, which should have custom ble servivnced and dfu feature.

After getting some trouble with zephyr os, i decided to test with sdk5. 

But it seems that nrf52833DK is not totally supported in all example. i wanted to start from dfu example and then integrate hrs example. Is it the good way to go ? 

Or may be the best is to start with hrs nfc paring ? but then how to integrate dfu. In the doc of how to integrate dfu, it is not for s113 ... 

I tried to migrate blinky ble from s112 10040e to s113 , i update ll the field but i finnaly get some linking .init errors with UNPLACED label.

I have the the feeling that zephyr or sdk5, nothing is really ready for nrf52833...

But i keep c9nfident, it is not like o wanted to do something ompossible, just  question of tile and good practice i guess.

thanks a lot for your help !

[Einar Thorsrud]

Hi,

nRF5 SDK version 16 is probably the best SDK for nRF52833 unless you have a particular reason for using nRF Connect SDK. It is correct that many examples are not adapted to it, but adjusting an existing example takes just a few minutes once you know what is needed.

For reference, I started off with the BLE bliky example for nRF52840 in SDK 16, for SES (\examples\ble_peripheral\ble_app_blinky\pca10059\s140\ses\ble_app_blinky_pca10059_s140.emProject).

1. Adjust the linker configuration macros to be correct for the flash and RAM size of the nRF52833, and the reduced size of the S113 SoftDevice:

2. Adjust the preprocessor defines to specify the correct board, IC and SoftDevice:

3. Adjust the include path to include S113 headers instead of S140 headers:

4. Make SES load the correct S113 SoftDevice when programming from SES:

[Olfox]

Also, should i use secure_bootloader_dfu + ble_app_buttonless application to have a complete dfu solution ? i  have flashed secure_bootloader_dfu i can see it with nrf toolbox. But there is no while(1) loop so i guess it is not a software where to place custom ble services ans application ? I f you can clarify with big pictur point of view it will help a lot :) . thanks a lot !

[Olfox]

Yes i also changed this files but it was not working. Have you tried my project ?

[Olfox]

Ha ! i have find the problem in my project , it comes from this :

I don't know how it is filled , do you know witch option did it please ?

[Olfox]

When i run the app i have the feeling that app is running is the one of the bootloader. When i scan i see DfuTarg and not Nordic_Buttonless . Here is the content of my memory.

[Olfox]

So when i  debug, i get this error. That strange because .hex of project secure bootloader is well flashed as shown in memory map

Debug Window: 

<error> app: No bootloader was found
<error> app: ERROR 4 [NRF_ERROR_NO_MEM] at C:\nordic\nRF5SDK160098a08e2\examples\ble_peripheral\ble_app_buttonless_dfu\main.c:854
PC at: 0x00026075
<error> app: End of error report
<error> app: No bootloader was found

[Einar Thorsrud]

Hi,

Ah, of course. I always started from the nRF52840 project because it was closest, and did not think about that uicr_bootloader_start_address was not configured in the other. That is the part that is missing. You can just keep the line as is, but if you want to be accurate, you can also change the flash and RAM sizes, so that it becomes 100% accurate (it does not have any practical implication, though).

FLASH RX 0x0 0x80000;RAM RWX 0x20000000 0x20000;uicr_bootloader_start_address RX 0x10001014 0x4