Re: [opensuse] Problems with USB GPS-device

On Sat, 30 Aug 2008 06:14:04 Rikard Johnels wrote:
Hello all!

I have a strange problem with a USB GPS device that wont "sync" its
datastream with the device node.. (Or how i would describe it)

Kernel bversion: 2.6.16.21-0.8-smp
gpsd version: 2.37
SuSE version: SUSE Linux Enterprise Desktop 10 (i586)

I am was using gpsd version 2.09 on SLED 10 sp1, and a BU-353 USB GPS
Receiver. I ran gpsdrive over that and it worked nicely.
I tried updating to 2.10pre4 via repository.
But i run into some problems.
I cant seem to get my USB GPS reciever to work after that.
I can see in /var/log/messages that it is found and gives it the ttyUSB0
device.
I can see the gpsd starting up as
/usr/sbin/gpsd -F /var/run/gpsd.socket /dev/ttyUSB0
but i cant telnet to 2947, it doesnt give anything at all.. No echo no
nothing.

I tried hexdump -C /dev/ttyUSB0, but it mostly gives me gabled output.
It is as if the reading of the datastream doesnt sync.
It starts of with thousands of 0x00 and 0x80 then going into random data,
and once in a short while slip into readable data. It doesnt stay that way
for more than a few seconds if at all...
[...]

I don't know if you can set the baud rate/parity etc. of a pseudo serial port
such as /dev/ttyUSB0 but in the case of a real serial port that would be my
first guess - that the serial port parameters don't match those of the
device.

I've not played with USB-serial devices (not needed to yet) but it would be
worth checking if setserial works for them to set the baud rate, parity, stop
bits and flow control parameters...

Of course, I could also be completely off track here, so I don't know if this
is helpful or not...


--
===================================================
Rodney Baker VK5ZTV
rodney.baker@xxxxxxxxxxxx
===================================================

Truly great madness can not be achieved without significant
intelligence.
-- Henrik Tikkanen

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