Hi , I report a problem to verify if someone has had the same problem so could help me.
I have 9 1Wire I/O expander chips (DS2408) all connected in chain mode , with a coaxial cable . The whole length of the bus (coaxial cable) is 40 meters . The expander chips are each together a circuit which has its own separate power (not from 1Wire bus) with a 5 Volt regulator. Each Expander (DS2408) receives power from regulator, too; I have verified that even without the separate power all the chips In the chain are seen from the bus master ( IButtonLink device). I am developing a custom code for controlling the system , but at first I used ONeWireViewer to make first tests. Using OneWireViewer I have sometimes a strange behavior : some chips seemed to be seen from the master but the master cannot act on their output , i.e. the outputs does not respond to master commands. This behavior is random , sometimes all chips behave correctly and sometimes one or to chips are their outputs stucked to a fixed level , independent of master commands. I thought it depends on lack of "magic sequence" that can be sent to chips to exit from test mode, but if the chip is in test mode only P0 output does not respond; in my system when a chip does not respond, it has the same behavior on all ports , not only P0. ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
