Convert nrf52840 projects to nrf21540DK target.

RE: Convert nrf52840 projects to nrf21540DK target.

AMarch01 — Mon, 25 Nov 2024 12:26:55 GMT

Thanks again, sorry for the near duplicate questions, I was just trying to synthesize ONE good question.

I tend to ramble.

RE: Convert nrf52840 projects to nrf21540DK target.

runsiv — Mon, 25 Nov 2024 12:23:22 GMT

Hi and that you for your patience, I had a unexpected absence.

Yes that is correct if you are using the DK then its already enabled in the config files for the DK. We have mentioned it sort of in some samples like here. I will ask if we can add a line somewhere fitting to make this more clear in the developing with FEM section in our documentation

Regards

Runar

RE: Convert nrf52840 projects to nrf21540DK target.

AMarch01 — Mon, 18 Nov 2024 19:32:57 GMT

Since I am on this journey, I will continue with what appears to be the /subsys/mpsl/fem firmware additions, which appear to be controlled by the existence for the FEM devices in the device tree.

So just enabling the prj.conf, I believe, enables the fem code with some default values.

So just selecting the board target of nrf21540dk/nrf52840 with the normal prj.conf , I believe enables the FEM code with some default values.

Is that a correct statement?

RE: Convert nrf52840 projects to nrf21540DK target.

AMarch01 — Mon, 18 Nov 2024 19:05:47 GMT

I mean it would be nice if this was just laid out in a document, but I suppose what needs to be done is add the following to the prj.conf file.

Now that I know the variables, I can search for discussions about them.

# FEM
CONFIG_MPSL_FEM=y
CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=y
CONFIG_MPSL_FEM_NRF21540_RX_GAIN_DB=0
CONFIG_MPSL_FEM_NRF21540_TX_GAIN_DB=20