Set transmission power in Contiki-NG and NRF5340

[Iliar Rabet]

Hi there,

I am trying to change the transmission power of the NRF5340 devices (for IEEE 802.15.4 radio) with Contiki-NG.
With some other hardware (sky motes) that is based on CC2420 radio we use a function like this:

static void
set_txpower(uint8_t power)
{
  uint16_t reg;

  reg = getreg(CC2420_TXCTRL);
  reg = (reg & 0xffe0) | (power & 0x1f);
  setreg(CC2420_TXCTRL, reg);
}

Obviously, NRF is not using CC2420 so this function is not working.

I wonder if there is a way to do that for NRF5340?

Bests,
Iliar

[Iliar Rabet]

Just sharing the answer from Contiki's forum:

-----

You can set the TX power using the RADIO_PARAM_TXPOWER parameter, i.e. something like:

NETSTACK_RADIO.set_value(RADIO_PARAM_TXPOWER, (radio_value_t) RADIO_TXPOWER_TXPOWER_0dBm);

You will need to include netstack.h.

[Edvin]

Hello,

There is a register for this on the nRF53 as well.

Please see the TXPOWER register documentation.

I don't know what TX power you need. But as you can see from the description, if you want higher than 0dBm, you need to enable the VREQCTRL.

You need to control this from the network core. I don't know whether we your application is using the network core to handle radio stuff. (we do not support contiki from Nordic's side).