DFU for HRS application in nRF5_SDK_16.0.0_98a08e2

[Lakshmikanth Satyavolu]

Hello All,

I am now planning to add DFU service to my HRS application (examples\ble_peripheral\ble_app_hrs\pca10040\s132\ses) 

I am using SDK nRF5_SDK_16.0.0_98a08e2. 

But I haven't found any DFU integrated project for HRS in this SDK. 

Where can I start? Any pointers can help. 

Regards

Lakshmikanth. 

[Vidar Berg]

Hello,

I would recommend that you use Buttonless DFU Template Application example as a reference and start by including the DFU dependencies and settings it uses to your HRS project. That is the main step to integrate buttonless DFU into any app.

Required source files (these can be inserted directly into the *.emProject file instead of adding them manually in SES):

    <folder Name="nRF_DFU">
      <file file_name="../../../../../../components/ble/ble_services/ble_dfu/ble_dfu.c" />
      <file file_name="../../../../../../components/ble/ble_services/ble_dfu/ble_dfu_unbonded.c" />
    </folder>
    <folder Name="nRF_SVC">
      <file file_name="../../../../../../components/libraries/bootloader/dfu/nrf_dfu_svci.c" />
    </folder>

And preprocessor definitions:

 - BL_SETTINGS_ACCESS_ONLY

 - NRF_DFU_SVCI_ENABLED

 - NRF_DFU_TRANSPORT_BLE=1

Regards,

Vidar

[Lakshmikanth Satyavolu]

Hi Vidar,

I took the project from  nRF\examples\ble_peripheral\ble_app_bps\ble_app_buttonless_dfu\pca10040\s132\ses

However when I try to build it produces build errors and not finding the source. I had to modify the below relative path for all the source files listed in .emproject file. 

file file_name="../../../../../../components/libraries/log/src/nrf_log_default_backends.c"   It seems all these entries are one directory behind for actual location. I have to add a ../ for each entry listed in this project file. 

Is there any other way I can modify the relative path to update .emproject file in oneshot? 

Regards

Lakshmi

[Vidar Berg]

Hi Lakshmi,

You can move 'ble_app_buttonless_dfu' directory one level up so it gets placed in \ble_peripheral\,  or you can open the project file in a code editor and replace all occurences of the existing relative path in one go (eg replace ../../../../../../ with ../../../../../../../).

[Lakshmikanth Satyavolu]

Hi Vidar,

It is building now. 

Does this ble_app_buttonless_dfu project contain Boot Loader + soft device + Application? Or is it only the application? 

Should I program boot loader and soft device separately to use this project? 

Regards

Lakshmi

[Vidar Berg]

Hi,

'ble_app_buttonless_dfu' is the application. The Softdevice and bootloader need to be programmed separately. I recommend to go through this blog post to get started: https://devzone.nordicsemi.com/nordic/short-range-guides/b/software-development-kit/posts/getting-started-with-nordics-secure-dfu-bootloader

[Lakshmikanth Satyavolu]

Hi Vidar,

I have programmed my device with example dfu images. It is working alright. 

Now I have integrated buttonlelss_dfu service into my hrs application. During services_init() I am getting NRF_ERROR_NO_MEM error returned in ble_dfu_buttonless_init() function. 

It is reported from sd_ble_uuid_vs_add() api from ble_dfu.c. 

What could be the reason? 

Regards

Lakshmi

[Vidar Berg]

Hi Lakshmi,

sd_ble_uuid_vs_add() returns no memory when the Softdevice does not have a free slot left for the new 128-bit base UUID you're trying to add (uuid for the buttonless DFU characteristic in this case). The solution for this is to increase the NRF_SDH_BLE_VS_UUID_COUNT setting in sdk_config.h. But note that after this change, you may get an error message in the debug log saying that the Softdevice does not have enough memory for the current configuration. To fix that you need to use the new proposed RAM settings from the debug log.

Regards,

Vidar

[Lakshmikanth Satyavolu]

Hi Vidar,

My NRF_SDH_BLE_VS_UUID_COUNT value is set to 0 in sdk_config.h. I made it 1. 

Now sd_ble_enable () in ble_stack_init() API even before services_init() throwing NRF_ERROR_NO_MEM. 

Are there any guidelines or documentaion available on how to add vendor specific service ? 

I have one more query, slightly off the topic but regarding same application. 

Does HRS example contain softdevice + application? or only application? 

If I would like to encrypt this app with my private key, is it enough to generate only application or anything else needed? 

Regards

Lakshmi

[Lakshmikanth Satyavolu]

Another thing, I am not having UART on my board. where can I check debug log?

[Lakshmikanth Satyavolu]

Hi Vidar, I changed RAM_START  from  0x20002bd0 to 0x2000ffdc as per sd_ble_enable() suggestion. But the below build error is showing up. What else can I change?  

-Lakshmi

[Vidar Berg]

Hi Lakshmi,

You also need to adjust RAM_SIZE to not overflow RAM. If you use a Segger Jlink debugger you may try to enable logging over Segger RTT (uses debug interface)

Settings in sdk_configh.h to enable logging over RTT:

Once you have enabled RTT you should be able to view log messages in the debug terminal during debug sessions. Like this:

And these are the RAM settings to update with the suggested values from the log:

Lakshmikanth Satyavolu said:

Does HRS example contain softdevice + application? or only application? 

It only contains the application. But SES loads the Softdevice hex file along with the application when programming, so you don't have to program it separately.

Lakshmikanth Satyavolu said:

If I would like to encrypt this app with my private key, is it enough to generate only application or anything else needed? 

 Encryption is not implemented in our DFU solution, only Signature Verification.