NRF52810 without softdevice S112

[Aurele]

Hello,

I would like to know if it is possible to not use softdevice because i need more flash for my code. I guess it is possible but when i don't enable softdevice in my code, the app_timer stops working and the power management too. Even if i remove SOFTDEVICE_PRESENT compilation flag, the issue is still present. 

My purpose is to use the FDS with my code (which is already filling 92% of the remaining flash (with S112) and my nrf52810 is not doing any BLE), so that's why i came up with removing the soft device but i would like to keep the main library available (in particular the app_timer since it is used in a library shared with a nrf52832) So, do i need to write my own timer or am i missing something ?

If you have any idea, feel free to share.

Best regards,

Aurélien

[awneil]

The SoftDevice is the BLE stack - so, if you're not using BLE, you don't need the SoftDevice.

[Vidar Berg]

Hello,

You can continue to use the app timer library without the Softdevice, but you need to make sure to start the LF clock (LFCLK clock controller) since it's not being started by the Softdevice anymore. Also, to use FDS without Softdevice you need to switch to the NRF_FSTORAGE_NVMC backend instead of the NRF_FSTORAGE_SD which uses the SD flash APIs.

Best regards,

Vidar

[Aurele]

Hello,

Indeed, i have added "nrf_drv_clock_lfclk_request" in my clock init and my timer is running again. Regarding the FDS, i have added FDS_BACKEND = 1 and nrf_nvmc.c to the compilation tree (since nrf_fstrorage_nvmc does not use nrfx interface) and all seems to work fine.

Thank you very much for your help Vidar Berg and awneil

Regards,

Aurélien

[Aurele]

I have one more question : does the MBR is part of the soft device ? If yes, it means that if i want to update my device i will need to write my own DFU ?

[Vidar Berg]

The MBR is included in the Softdevice hex, but there is also a standalone version of it in  \components\softdevice\mbr\hex\ which you can use together with the UART bootloader. The Softdevice is only required if you need DFU over BLE.