Hello.
On Wed, Mar 08, 2006 at 12:18:33AM -0500, Paul Alfille ([EMAIL PROTECTED])
wrote:
> Just a progress report:
>
> After extensive discussions with Evgeniy Polyakov, it looks like OWFS will be
> able to use the linux kernel 1-wire drivers as a possible 1-wire adapter
> source.
...
Found mail archive with this discussion. I'm not subscribed so please
Cc: me on replies.
Couple of notes after archive reading:
1. w1 supports on-demans searching in the following way:
search is performed on $w1_timeout interval basis, which is provided as
module parameter. By manipulating w1_master_search sysfs file one can
trigger to search or not on next $w1_timeout interval.
2. I plan to create demo code for netlink socket communication interface for w1
this week. This will completely eliminate any kind of races with
multiple workers/reset and so on.
3. w1 has it's advantages due to it's in-kernel place:
* some processors (Freescale made) have w1 units which can not be
accessed from
userspace without in-kernel driver
* GPIO pins can not be accessed from userspace without in-kernel
driver (actually there is [1] generic GPIO framwork with w1
driver tested with pc3487x and natsemi sc1100, but work was
frozen
due to lack of hardware)
* w1 supports asynchronous notifications of new devices found,
which are multicasted for any process over netlink
socket interface.
Probably advertisement should be stopped here.
I'm open for discussion.
Thank you.
1. http://tservice.net.ru/~s0mbre/old/?section=projects&item=soekris
> Paul Alfille
--
Evgeniy Polyakov
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