Title: LED Not Blinking on Custom Board (Raytac MDBT50Q - nRF52840

[Usha]

Hello,

I am using a Raytac MDBT50Q (nRF52840) on a custom board, and I am trying to blink an LED, but it is not working.

• "I need urgent help as this is blocking my development. Any quick suggestions would be greatly appreciated!"

[runsiv]

Hi

Please provide the following:

- NCS version and toolchain

- overlay for your application 

As this is a custom board, have you tried your application on a DK and verified if it works? What starting point did you use for the custom board?  

Regards

Runar

[Usha]

NCS version 2.5.1 and toolchain

i have tried on DK and it's works properly

[runsiv]

It would be more efficient if you give information I asked for. Anyhow, I common issue that we see is that people do not create their own custom board and just uses an overlay for their custom board. Do you use external LF crystal or internal? If you use internal, have you set this up in your configuration? 

Regards

Runar

[Usha]

yes i have use internal crystal but how can i set any suggestion?

[runsiv]

Hi, if you add the following to your prj.conf it should be fine. 

CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y

CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n

Regards

Runar