Hi Mick! Of course it is, and when I went to bed yesterday, I realized it :) I built the circuit based on DS2408 datasheet Figure 22 (DS2408 as multipurpose sensor/actuator), and they pull-up to Vcc with a 10k resistor. I wanted to have inverted switch states (if my windows/doors are closed, I want them to be 1, otherwise 0), so I used a pull-down instead. But of course, I forgot to handle the RSTZ in a different manner, like in the datasheet. My second board was correctly wired, the other two not.
Thanks for help! Markus On Oct 28, Mick Sulley <m...@sulley.info> wrote: > Could it be some difference with the external circuit rather than the > chip? Can you swap them over to see if the problem goes with the chip > or stays with the circuit? > > > On 28/10/11 22:22, Markus Gaugusch wrote: >> On Aug 8, Markus Gaugusch<mar...@gaugusch.at> wrote: >> >>> I'm using latest owfs 2.8p13 and have (among others) two DS2408 chips on my >>> network. There is only one strange problem: For one of them, latches work >>> fine, but for the other one, the latches are always zero. >> >> Some time has passed, but finally I found a solution (or rather: >> workaround??): >> I needed to do "echo 1> strobe" for the ds2408 which didn't set its latch >> bits. >> >> Can any of the hardware gurus clarify why this is needed (especially: why >> is this needed for one of my chips but not for the other?). >> >> I've just built a third board, with exactly the same behaviour (needs >> strobe to make latch work). >> >> >> Thanks :-) >> Markus >> >> ------------------------------------------------------------------------------ >> The demand for IT networking professionals continues to grow, and the >> demand for specialized networking skills is growing even more rapidly. >> Take a complimentary Learning@Cisco Self-Assessment and learn >> about Cisco certifications, training, and career opportunities. >> http://p.sf.net/sfu/cisco-dev2dev >> _______________________________________________ >> Owfs-developers mailing list >> Owfs-developers@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/owfs-developers > > ------------------------------------------------------------------------------ > The demand for IT networking professionals continues to grow, and the > demand for specialized networking skills is growing even more rapidly. > Take a complimentary Learning@Cisco Self-Assessment and learn > about Cisco certifications, training, and career opportunities. > http://p.sf.net/sfu/cisco-dev2dev > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/owfs-developers > > > -- __________________ /"\ Markus Gaugusch \ / ASCII Ribbon Campaign markus(at)gaugusch.at X Against HTML Mail / \ ------------------------------------------------------------------------------ Get your Android app more play: Bring it to the BlackBerry PlayBook in minutes. BlackBerry App World™ now supports Android™ Apps for the BlackBerry® PlayBook™. Discover just how easy and simple it is! http://p.sf.net/sfu/android-dev2dev _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
