[Tinyos-help] cc2420 RF power

[Marco Antonio Lopez Trinidad]

Hi Roberto,

> the cc2420 allows different RF output power levels. The default value is set
> to
>
> (1 << CC2420_TXCTRL_PADIFF) | (0x1f << CC2420_TXCTRL_PAPWR));
>
> I'm wondering to know to which value that correspond to, since I didn't find
> it in the datasheet. Also, the possible values are
>
> 31
> 27
> 23
> 19
> 15
> 11
> 7
> 3
>

That are not the right output power RF values, the right-ones are:

P = -25 dBm, -15 dBm, -10 dBm, &#8722;5 dBm, 0 dBm. (radio Manual page 14 of 90)

by default the radio is set to 0 dBm.

check it in:

/opt/tinyos-1.x/tos/lib/CC2420Radio

In particular,

CC2420Const.h

and

CC2420ControlM.nc

> what happens if the RF power is set to a different value, say 30 for
> example?
>
>
> Thank you
>

ciao,
--marco.