Am 04.02.2016 um 14:06 schrieb Timo Engel:
>
> I'm wondering what is the correct procedure to read/write form/to an
> EEPROM. Is it sufficient to use write() and write 32 bytes for example
> to pages/page.0?
>
Yes.
> Are there any status information if the last write()
> was successful?
>
If the operation returns without an error, it was successful.
> Is owfs doing any checks of CRC and sends messages
> again to the device or do I have to implement this on my own?
>
OWFS checks all CRCs given and does the checks as required.
>
> It would be nice to verify the written data by reading them back,
>
This is done inside OWFS already where applicable
> but
> it seems to be useless because of the caching mechanism of owfs. I
> know about the "uncached" directory, but reading from there makes owfs
> stop working.
>
No. If it does for you, your installation is broken. Which version of
OWFS do you use?
>
> I can imagine the communication will be more reliable if it is slower.
> Is there an option to change the speed
> of the bus? Maybe when building owfs?
>
Communication speed is hard-wired inside the chips and can't be changed.
Usually it's not a problem at all, being only about 10kBaud.
You can advise owfs not to use the overdrive speed for chips which
support it, but neither the DS2433 nor the DS2436 do.
> I'm using the w1 kernel driver.
>
You need to use at least owfs-3.1p1 or downgrade your kernel to a
version before 3.16rc1. Or don't use the kernel driver at all.
Kind regards
Jan
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