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Subject: Re: Feature proposal: received signal strength indicator for fm radio

Re: Feature proposal: received signal strength indicator for fm radio

From: Marcin Bukat <>
Date: Mon, 25 Oct 2010 08:31:58 +0200

2010/10/24 Bertrik Sikken <>:
> Hi all,
> I'd like to propose a new feature:
> received signal strength indication (RSSI) for fm radio
> This makes it possible to show an indication of the radio signal
> strength in the FMS in two ways:
> * as a number (in the logarithmic unit dB microvolts, or dBuV)
> * as a graphic, for example a little antenna with a variable number
>  of bars next to it (similar to how we show volume).
> This will need several steps to be done:
> 1) add support in the fm tuner drivers that can do this
> 2) create new tags for this, add code to parse and render the tags
> 3) create a WPS + RSSI graphic that actually uses the new tags
> Step 1) is mostly done now, see
> Nearly all fm tuner chips support RSSI, except for the s1a0903x01.
> The TEA5760 and TEA5767 support it, but update it only when changing
> channel. The RSSI value is retrieved with tuner_get(RADIO_RSSI),
> possible tuner-specific minimum and maximum RSSI values are #defined
> and accessible through tuner.h
> Steps 2) and 3) are yet to be done.
> Please let me know what you think.
I am all for this.

How do You want to handle TEA chips?

Received on 2010-10-25

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