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


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