On Wed, Feb 4, 2009 at 7:17 PM, Nicklas Björk <[email protected]> wrote: > Hi > > I have tried to construct a simple circuit using a MAX232CPE and a > DS2480B and hook it up to the owserver. When running on a usb-serial > adapter I got random errors, for example Segmentation fault, > Trace/breakpoint trap, Floating point exception and Illegal instruction. > I thought it might have to do with the usb-adapter so I connected it to > a real serial port but the result were the same. > > I have checked the mailing list and made sure that VDD, VPP and POL of > the DS2480B are connected to +5V. I get the segfaults with or without > anything connected to the 1-wire pin and with and without parasite > powered thermometer connected. The RX232-circuit seems to work as it can > do loopback to the pc on the UART-side. > > On the software side I've been trying kernel 2.6.22.14 and 2.6.28.1, the > lastest release of owfs 2.7p13 as well as the lastest in cvs as of today > 2009-02-05. The usb-serial adapters are pl2303-based. > > In dmesg I get lots of errors of this kind on the computer with kernel > 2.6.28.1: > owserver[15073] general protection ip:804de21 sp:b75de328 error:0 in > owserver[804d000+1000] > > Any ideas what could be wrong? > > > Nicklas Björk >
Hello! Are you following the exact schematic for a DS9097 given in the application notes for the DS2480B? It happens that the MAX232 isn't needed. What is needed is exactly what those notes describe. ----- Gregg C Levine [email protected] "This signature was once found posting rude messages in English in the Moscow subway." ------------------------------------------------------------------------------ Create and Deploy Rich Internet Apps outside the browser with Adobe(R)AIR(TM) software. With Adobe AIR, Ajax developers can use existing skills and code to build responsive, highly engaging applications that combine the power of local resources and data with the reach of the web. Download the Adobe AIR SDK and Ajax docs to start building applications today-http://p.sf.net/sfu/adobe-com _______________________________________________ Owfs-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/owfs-developers
