nrf52840 radio not sending any packets

[bsm]

Hi Team,

I am working on nrf52840, for openthread application

I flashed cli code built  with USB=1 (enables Nrf USB J3), DIAGNOSTIC=1 (enabling factory diagnostics) option using JLINK debugger. 

some board configurations are as below

SW6 - nrf only mode

SW9 - USB power mode

connected USB (PC) to mini-usb ( nrf USB J3) connector, got the diag command in the command line terminal

when I started diagnostic mode, and I tried sending packets on channel 11

when I  run diag statistics command, it returning as 0 packets sent. In packet sniffer I am not able to see any radio related packet

Not: Tx power is 0 dbm, we tried writing and reading to/from radio register, no success in reading the written reg value.

My doubt is does nrf52840 needs to be flashed with any prebuilt binary which sets radio with factory default settings

It would be great help if I get any inputs on this request.

Regards,

Sudhamani 

[Andreas]

Hi,

 

Have you determined if the cause is your FW or HW, e.g. is your board able to run the radio test example and transmit a continuous TX carrier?

 

Best regards,

Andreas

[bsm]

Hi Andreas,

Thanks for the response.

I am working on custom board with native USB support only.

when I flashed radio test binary using Jlink, I didn't get any CLI terminal.

How can I build the radio test project with native USB support?

Note: I have tested radio test binary in nrf52840-DK boards, working as expected.

Any input on this would be great help.

BR

Sudhamani

[Andreas]

Hi,

 

When you say 'native USB supply', have you only powered VBUS? Or does the rest of the board have power as well?

 

Best regards,

Andreas

[bsm]

Hi,

Custom board will be powered with external 5v power supply.

native USB means, nRF USB (J3 on nrf52840-DK board). we have similar design in custom board. we wanted to use it for CLI.

our doubt is;

How can I build the radio test project which enables accessing CLI through nRF USB.

Regards,

Sudhamani

[Andreas]

Hi,

 

You would probably have to merge the radio test example and one of the USB examples, or your USB code. This will probably take some work, so I would just use UART instead. Hook P0.06 and P0.08 on your board up to P0.06 and P0.08 on the NRF52840 DK, and cut the solderbridges such that the nRF52 on the DK is not powered. You can then run the precompiled example on your DUT, and use the DK as UART bridge.

 

Best regards,

Andreas