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]
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