Setup nRF21540 RF Power in DTM FW with nRF5340 and Zephyr

RE: Setup nRF21540 RF Power in DTM FW with nRF5340 and Zephyr

NoahKim — Tue, 02 Apr 2024 14:01:02 GMT

Oh, I think i just applying GPIO mode only.

I'll checking that.

About setup, i just want to setup the power at build time.

The problem is that as i know that, rf power level is only setup 10dBm and 20dBm if I enabled power model.
But I think it can possible to setup rf power level after using SPI mode.

I'll trying again with SPI way.

RE: Setup nRF21540 RF Power in DTM FW with nRF5340 and Zephyr

Vidar Berg — Tue, 02 Apr 2024 13:47:24 GMT

Have you enabled SPI as instructed in the link I posted above? Also, do you want to set the output power through the DTM command, or at build time?

RE: Setup nRF21540 RF Power in DTM FW with nRF5340 and Zephyr

NoahKim — Tue, 02 Apr 2024 13:31:14 GMT

Hi Vidar, Thanks for reponse.

I used SDK 2.4.0.

But the problem is that it's hard to configuration setup the power level such as 0dBm, 3dBm, etc.
(I already checked for setup 10dBm and 20dBm through FEM.)

I want to setup power level to 0dBm or 3dBm through FEM.

Best Regards,

Noah

RE: Setup nRF21540 RF Power in DTM FW with nRF5340 and Zephyr

Vidar Berg — Tue, 02 Apr 2024 13:19:47 GMT

Hello Noah,

It appears that this supported according to the sample documentation at https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.6.0/nrf/samples/bluetooth/direct_test_mode/README.html#tx-output-power. What SDK version are you on?

You will also need to enable the FEM SPI support in your devictree: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.6.0/nrf/device_guides/working_with_fem.html#spi-gpio-mode

Best regards,

Vidar