NRF_LOG is not working in my Custom Board

[namitha K M]

Hello,

I am working NRF52840 as custom board, In my custom board NRF_LOG is not working I mean Nothing is displaying on terminal like tera term or termite. If load the code in Development Board (NRF52840 DK Boards) its working fine and also I Can view the data on terminal. My problem is in my custom board, can you please help me on this. How to solve this type of issues. 

Thanks & I am waiting for your response.

[Susheel Nuguru]

How did you connect the uart pins on your custom board to the host Serial com port where you have your terminal?

Out DK have an onboard debugger which also converts raw serial TX/RX/RTS/CTS data into a CDC COM port that can be virtualized on a USB port of your host system. I am assuming that your custom board does not have onboard debugger that can do this. 

[namitha K M]

Hi,

Thanks for the reply.

I have connected my custom board as via SWDIO and SWCLK and VDD and VSS.

I will share the some link how i am connecting my custom board with DK Board

devzone.nordicsemi.com/.../programming-a-custom-board-with-an-nrf52840-dev-kit

[Susheel Nuguru]

For the virtual com port to work, you need ALSO need to connect your custom board uart pins to the nRF52840 UART pins that are connected to the CDC port of the onboard debugger.

[namitha K M]

Hi,

How to connect the host serial com and also tell me how to enable the onboard debugger. Please help me on this.

[Susheel Nuguru]

Jansi, the instructions are given in the link in my last reply. In short,

You connect the custom board UART pins to the DK UART pins 

Then you open the terminal emulator (like teraterm or putty) and open the com port like COMXX (where XX is the number emulated when you connect the DK to the computer using the USB) and choose the correct setting on your terminal emulator selected com port (like baudrate, HWFC, stop bit, parity etc). Then you have a connection to the computer terminal emulator to the DK and the DK have a uart connection to your custom board. All you custom board UART traffic will be forwarded to P0.05,P0.06,P0.07, and P0.08, and These pins will forward the data to your terminal emulator on the computer through the CDC Jlink driver.