Setting runtime PA Gain on nRF21540 (Dynamic Gain) Fails

RE: Setting runtime PA Gain on nRF21540 (Dynamic Gain) Fails

Edvin — Mon, 22 May 2023 07:57:16 GMT

I think you are lookng for otPlatRadioSetTransmitPower().

Did you test that?

Best regards,

Edvin

RE: Setting runtime PA Gain on nRF21540 (Dynamic Gain) Fails

qwerty100 — Mon, 15 May 2023 13:30:03 GMT

Yes - its the implementation of the mpsl_fem_pa_gain_set() that is the problem. As you note I'm incorrectly using the OpenThread LNA function simply as hook to get/set the PA gain.

Thread (surprisingly) does not provide an otPlatRadioSetFemPaGain() function

RE: Setting runtime PA Gain on nRF21540 (Dynamic Gain) Fails

Edvin — Mon, 15 May 2023 12:57:14 GMT

Hello,

I see that you are trying to set the lna gain. Is that your purpose? Perhaps you want to set the PA gain, which is the TX power. The LNA gain is the receiver's amplifier, which it doesn't really make any sense to adjust during runtime.

RE: Setting runtime PA Gain on nRF21540 (Dynamic Gain) Fails

Edvin — Fri, 12 May 2023 12:44:51 GMT

Hello,

I am sorry I can't give a better answer right now due to limited time, but search this forum for "setting the TX power in openthread". There are a few posts on it. I don't remember if the ot cli command is using the correct API for this (for the nRF52/nrf53 series).

I will get back to you next week with a follow up.

Best regards,

Edvin