FW: Converting signal and noise values to dBm

Varga Dávid varga.david at duvinet.hu
Sun May 6 08:37:24 EDT 2007


Hi!

 

Does noone know the answer? I received a solution, that subtracting 256
would be fine, but it doesn't give the values displayed by iwconfig (anyway,
thanks Drew!).

Please help!

Thanks,

David

 

  _____  

From: Varga Dávid [mailto:varga.david at duvinet.hu] 
Sent: Thursday, April 26, 2007 3:19 PM
To: 'hostap at shmoo.com'
Subject: Converting signal and noise values to dBm

 

Hello!

I'd like to convert the rx_stats->signal and rx_stats->noise values in the
hostap_80211_rx.c to dBm.

At the moment I use printk(KERN_DEBUG "%d %d", rx_stats->signal,
rx_stats->noise); 

and it gives me back signal rates 180.230 and noise rates 160.170.

I tried using printk(KERN_DEBUG "%d %d",
HFA384X_LEVEL_TO_dBm(rx_stats->signal),
HFA384X_LEVEL_TO_dBm(rx_stats->noise));

but it still doesn't give me the negative dBm values that iwconfig does.

Could anyone help with this?

Thanks;

David

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