You're welcome :) and thanks for fixing it so quickly !
On Mon, Jul 4, 2011 at 3:27 PM, Paul Alfille <[email protected]> wrote:
> Good pickup, Nicolas. Your detailed analysis made the problem obvious!
>
> That "anydevices_no" is set whenever the DS2482 undergoes a 1-wire reset.
> It senses if there is a presence pulse.
>
> In this case, the test was made before the reset -- leaving the bus is the
> "no device, so no reset needed state.
>
> The presence pulse test is optional in any case -- just adds some
> efficiency since the bus doesn't need to be fully "discovered" if there is
> no device seen on reset.
>
> In any case, I'll move the test until after the reset, which should solve
> the problem.
>
> And, of course, I'll have to look at the other bus masters to make sure the
> same error isn't present. Thanks for finding this!
>
> Paul
>
> On Sun, Jul 3, 2011 at 2:22 PM, Nicolas Leonard <
> [email protected]> wrote:
>
>> Hello,
>>
>> I'm using owserver with a DS2482 host adapter (i2c <-> 1wire chip), and
>> found an issue which prevent one-wire devices to be discovered.
>> I'm using owfs 2.8p10, and the iButton devices are simple DS1990 id
>> buttons.
>>
>> To reproduce it :
>> 1. launch the server (owserver --foreground --i2c=/dev/i2c-0:0
>> --error-level=9)
>> 2. connect a DS1990 iButton
>> 3. call 'owget /uncached' => it finds and prints the 01.XXXXXXXXXXXX id
>> 4. disconnect the iButton
>> 5. call 'owget /uncached' => it doesn't find any device, as expected
>> 6. reconnect a DS1990 (same one or other one)
>> 7. call 'owget /uncached' => it doesn't find any device, and I have to
>> restart the server to make it work again.
>>
>> If I never call 'owget' when there are no devices connected, and just
>> switch from iButton to another, it works. (doing the step above, without 4/
>> and 5/)
>>
>> I've looked to the code and the problem seems to lie in *
>> ow_ds2482.c:DS2482_next_both*().
>> When owget without any devices is called, it seems to stuck the *
>> DS2482_next_both*() in a state where the following code is always
>> executed
>>
>>> if (pn->selected_connection->AnyDevices == anydevices_no) {
>>> ds->LastDevice = 1;
>>> }
>>
>> .. resulting in no device discovery at all.
>>
>> Just for testing, I just commented this block .. and it works perfectly.
>> But I've seen that the way a lot of other master adapters are working so I
>> don't think it's the right way to fix it.
>>
>> Just for information, I've already used owfs a lot, but with an USB
>> adapter, which has a built-in identification Chip, so the previous case can
>> never happen.
>>
>> This problem is critical to me, I will really appreciate if someone could
>> have a look on it.
>> I can also do more testing if anybody wants.
>>
>> Thanks,
>>
>> Nicolas
>>
>>
>> --
>> Nicolas Léonard
>> Oxecom - Gérant
>> +33 (0) 6 12 83 65 35
>> [email protected]
>>
>>
>>
>> ------------------------------------------------------------------------------
>> All of the data generated in your IT infrastructure is seriously valuable.
>> Why? It contains a definitive record of application performance, security
>> threats, fraudulent activity, and more. Splunk takes this data and makes
>> sense of it. IT sense. And common sense.
>> http://p.sf.net/sfu/splunk-d2d-c2
>> _______________________________________________
>> Owfs-developers mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>>
>>
>
>
> ------------------------------------------------------------------------------
> All of the data generated in your IT infrastructure is seriously valuable.
> Why? It contains a definitive record of application performance, security
> threats, fraudulent activity, and more. Splunk takes this data and makes
> sense of it. IT sense. And common sense.
> http://p.sf.net/sfu/splunk-d2d-c2
> _______________________________________________
> Owfs-developers mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>
>
--
Nicolas Léonard
Oxecom - Gérant
+33 (0) 6 12 83 65 35
[email protected]
------------------------------------------------------------------------------
All of the data generated in your IT infrastructure is seriously valuable.
Why? It contains a definitive record of application performance, security
threats, fraudulent activity, and more. Splunk takes this data and makes
sense of it. IT sense. And common sense.
http://p.sf.net/sfu/splunk-d2d-c2
_______________________________________________
Owfs-developers mailing list
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