[linux-dvb] scan and zap ..
holger at qanu.de
Sat Jun 18 19:38:11 CEST 2005
Am 18.06.2005 um 18:11 schrieb Manu Abraham:
> Manu Abraham wrote:
>> Hi ,
>> I was looking at a concept where a driver can distinguish between
>> a scan and a zap.. Suggestions would be greatly appreciated ..
> I will make my question a bit more specific ..
> While doing a scan, do we require to know the signal strength.. The
> driver in question is the dst .. If we do not need to know the
> signal strength the dst will tune a bit more faster, since instead
> of 2 messages that are sentto the MCU/ASIC, only one need to be sent.
> Hence tuning will be faster, as i2c communication also takes a
> while to happen, and to retrieve the signal strength on a frequency
> that does not exist, it takes really a while to return back and can
> be a cause for irritation ..
> So i was thinking about removing the get_signal() call itself
> during a scan ..
at 400kHz i2c clock the time required to transmit a 2-byte-message
should be negligible, not?
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