Re: Sparkfun Pro nRF52840 Mini support?

Rodrigo Peixoto <rodrigopex@...>

Hi Lawrence,

I am not aware if anyone is bringing up this board, but I can suggest you bring it up yourself. It is not a big deal. The process is copying, pasting, and changing some portion of the files. 

How experienced are you on Zephyr?

1 - Is the Bluetooth module using dc-dc or LDO? 
    YES: Do nothing just copy the board files and rename them;
     NO: You must to disable DCDC by setting the BOARD_ENABLE_DCDC to "default n" at the Kconfig file. 
2 - Is the low-frequency oscillator is present on the Bluetooth module?
    YES: Do nothing
    NO: You have to add the CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y to the "board_name_defconfig" file. 

The last step is to change the DTS to adjust the pins used by your board. 

If you need further help let us know.

Best regards,
Rodrigo Peixoto
Co-founder and Technical advisor

+55 (82) 98144-8585 | Skype: rodrigopex

Em qui, 18 de abr de 2019 às 11:09, Lawrence King <lawrence.king@...> escreveu:

I just received some Sparkfun nRF52840 boards and I was hoping to bring up Zephyr on the boards.


There is a Sparkfun nRF52832 board listed in the supported boards, but this board needs an external debugger. Now that Sparkfun has two different nRF52 boards I think that the existing board in the tree nrf52_sparkfun needs to be renamed to nrf52832_sparkfun, and the new board should be added as nrf52840_sparkfun.


The nrf52840_sparkfun board has an onboard bootloader which presents as a tty and a usb drive when I plug it in so I expect that pyOCD should work for loading code and debugging, however I think that the ROM layout may need to be changed to not overwrite the bootlopader.


Is anyone working on bringing up this board?



Lawrence King

Principal Developer

Connected Transport Market Unit



1  2 - linkedin  3 - instagram  4 - youtube  6 - facebook  7


CONFIDENTIAL: This e-mail and any attachments are confidential and intended solely for the use of the individual(s) to whom it is addressed. It can contain proprietary confidential information and be subject to legal privilege and/or subject to a non-disclosure Agreement. Unauthorized use, disclosure or copying is strictly prohibited. If you are not the/an addressee and are in possession of this e-mail, please delete the message and notify us immediately. Please consider the environment before printing this e-mail. Thank you.




Join to automatically receive all group messages.