To get a proper answer to that question you will have ask Paul Afille.
But my understanding is that owfs remembers that it recently has issued
a skip rom command.
H
2013-10-10 22:08, Colin Reese skrev:
> That was my question. my understanding was that when I execute the
> read of the file, the read is performed. How does owfs know the
> registers have been updated 'recently enough' by the simultaneous
> command, rather than performing the read when I read the temperature file?
>
>
> On Thu, Oct 10, 2013 at 1:04 PM, Håkan Elmqvist <hak...@smeden.org
> <mailto:hak...@smeden.org>> wrote:
>
> Yes, it does, a simple read of the temperature registers, that
> just have been updated by the write to
> /ow/simultaneous/temperature if that was your question otherwise
> the little * does the globbing for us.
> 2013-10-10 18:39, Colin Reese skrev:
>> doesn't 'cat /ow/10.*/temperature' initiate a simple read?
>>
>> Colin
>>
>>
>>
>> On Thu, Oct 10, 2013 at 9:25 AM, Håkan Elmqvist
>> <hak...@smeden.org <mailto:hak...@smeden.org>> wrote:
>>
>> And here is the result for 12 DS1820:
>> root@hemx:~# echo 1 >/ow/simultaneous/temperature; time
>> (sleep 1; cat
>> /ow/10.*/temperature;)
>> 23.5 23.3125 23.375 23.5 23.25
>> 23.5
>> 23.375 23.375 23.5 23.5 23.5625
>> 23.375
>> real 0m1.944s
>> user 0m0.000s
>> sys 0m0.000s
>>
>>
>>
>>
>>
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>
> --
> Håkan Elmqvist
> Sunnerdahlsv 7
> 167 62 Bromma
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>
>
--
Håkan Elmqvist
Sunnerdahlsv 7
167 62 Bromma
Telefon: +46 (8) 80 18 81, +46 (704) 56 74 81, +46 (176) 84 077
epost: hak...@smeden.org
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