On Wed, 26 Oct 2005, Alfille, Paul H.,M.D. wrote:
Thanks. I especially appreciate the patch.
I take it the code wasn't too hard to decypher?
Hehe... I assumed that this was DS2413 specific issue and I looked into
low level driver of this chip. But this is 'dirty' patch.
I think that 'right way' should be some level up where emulatiion of
toggling single bits is. But I couldn't find this in quick search and I
suppose that fixing/rewriting that part of code will be not so easy as
this.
Or just disable this option for this chip - there is no native bit set in
DS2413 - you must always set two bits together.
Regards
majek
--
"If you want something done...do yourself!"
Jean-Baptiste Emmanuel Zorg
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Marek
Wodzinski
Sent: Wednesday, October 26, 2005 3:10 PM
To: Owfs-developers@lists.sourceforge.net
Subject: [Owfs-developers] Bug in DS2413
Hello,
There is a bug in operating on PIO.A or PIO.B.
If you write to PIO.A, state of PIO.B (and vice versa) is fetched from pin
state instead of latch state. This lead to loss of state of PIO.B if you
write to PIO.A (and vice versa).
For example:
I have pull down resistor in PIN.B, so:
cat sensed.B --> 0
echo 0 >PIO.B
cat latch.B --> 1
echo something >PIO.A
cat latch.B --> 0
Patch attached
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