BLE DTM Test functionality of Nordic zephyr BLE controller not working

RE: BLE DTM Test functionality of Nordic zephyr BLE controller not working

Hung Bui — Thu, 17 Mar 2022 16:29:40 GMT

Hi DJ,

The update will come directly to the Github PR and issue report that you pointed to. It's the same staffs that I reported to.

RE: BLE DTM Test functionality of Nordic zephyr BLE controller not working

djgj — Wed, 16 Mar 2022 16:50:47 GMT

Hi,

Thank you very much for the response. I will take a look at those examples.

Meanwhile i will wait for answers on my other questions on solving the issue in lll_test.c itself.

Regards,

RE: BLE DTM Test functionality of Nordic zephyr BLE controller not working

Hung Bui — Wed, 16 Mar 2022 14:37:25 GMT

Hi DJ,

If you are testing with a Bluetooth Tester equipment (Anritsu MT8852 or R&S CBT32 etc), then the direct test mode firmware should be used. It follows the Direct Test Mode protocol defined in Bluetooth Spec.

If you are testing anything else, FCC for example, then the radio test would be a better option. In the radio test you have the flexibility to configure what you want to transmit.

The Direct test mode example and the lll_test.c should behave very similar, as far as I know.

RE: BLE DTM Test functionality of Nordic zephyr BLE controller not working

djgj — Wed, 16 Mar 2022 13:52:07 GMT

Hi,

Thank you for the response.

We are certifying our hardware. Our certification application targets executing Tx and Rx on BLE Channels with or without modulation.

We basically used the functions from here: https://github.com/zephyrproject-rtos/zephyr/blob/main/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_test.c

Can you also kindly tell me which sample is closer to using lll_test.c from original zephyr repo?

* `/samples/peripheral/radio_test`

* `/samples/bluetooth/direct_test_mode`

Regards,

RE: BLE DTM Test functionality of Nordic zephyr BLE controller not working

Hung Bui — Wed, 16 Mar 2022 12:07:38 GMT

Hi DJ,

I'm checking internally to see if we have a solution for you. I will keep you updated.

Regarding your question about the radio_test sample, as far as I know it uses the radio directly so it doesn't matter if your firmware will use Zephyr controller or Softdevice controller.

Which certification are you planning to do ? If you are certifying your hardware I don't think it's important if you run on Zephyr controller or Softdevice controller or bare metal . For example the direct_test_mode sample also use radio in bare metal.