The perl program (or ow.pm) use the same library as owfs. It will also have the same constraints -- it needs access to the usb port.
You aren't running the programs at the same time, are you? They can't both access the port. Well they can, but you have to use owserver so: sudo owserver -d /dev/ttyUSB1 -p 4304 owfs -s 4304 -m /1wire3 perl connects to -s 4304 Note that only owserver needs root permissions in this setup. Paul On Mon, Jan 5, 2009 at 6:30 PM, William Brown <mahi...@earthlink.net> wrote: > My bad, I noticed I ran owfs without su so I tried again. It didn't > work so I restarted the computer and created a third directory 1wire3 > and I was successful using owfs to read the DS9097U. So it's something > in my Perl program that is choking. Perl program works ok with the > DS9490R but not with the DS9097U > > /mnt/1wire3 > |-- bus.0 > | `-- interface > | |-- settings > | | |-- address > | | |-- datasampleoffset > | | |-- ds2404_compliance > | | |-- flexible_timing > | | |-- name > | | |-- overdrive > | | |-- pulldownslewrate > | | |-- version > | | `-- writeonelowtime > etc > > | |-- errors > > | | |-- BUS_bit_errors > > | | |-- BUS_byte_errors > > | | |-- BUS_detect_errors > > | | |-- BUS_echo_errors > > | | |-- BUS_level_errors > > | | |-- BUS_next_alarm_errors > > | | |-- BUS_next_errors > > | | |-- BUS_readin_data_errors > > | | |-- BUS_status_errors > > | | |-- BUS_tcsetattr_errors > > | | |-- CRC16_errors > > | | |-- CRC16_tries > > | | |-- CRC8_errors > > | | |-- CRC8_tries > > | | |-- DS2480_level_docheck_errors > > | | |-- DS2480_read_fd_isset > > | | |-- DS2480_read_null > > | | |-- DS2480_read_read > > > etc > > William Brown wrote: > > When I try to access DS9097U serial adapter attached by HL-340 usb to > > rs232 adapter. > > Only the DS9097U is attached, there are no other devices (should be OK?) > > > > $ sudo mkdir /mnt/1wire > > $ sudo /opt/owfs/bin/owfs -d /dev/ttyUSB1 /mnt/1wire > > $ tree -a /mnt/1wire > > > > /mnt/1wire [error opening dir] > > > > Paul Alfille wrote: > > > >> On Mon, Jan 5, 2009 at 4:45 AM, William Brown <mahi...@earthlink.net > >> <mailto:mahi...@earthlink.net>> wrote: > >> > >> So now I'm getting this error: > >> > >> DEFAULT: Cannot detect DS9097 (passive) interface on /dev/ttyUSB1 > >> > >> Can you tell me what it means? Will owfs pass through a rs232/usb > >> converter? > >> > >> I general, yes. > >> There is a difference between the DS9097 and the DS9097U (blame Maxim > >> for that). > >> One is a passive device that depends on the exact serial pulses to > >> synthesize 1-wire pulses, the other (the 9097U) uses a IC called the > >> DS2480B to manage the 1-wire communication. > >> > >> If you have a passive 9097 adapter, try --8bit. Some of the serial > >> devices can't create 6-bit communication. That might be the case > >> withthe USB convertor. > >> > >> You are using /dev/ttyUSB1. I assume you got that from dmesg output. > >> The allocation can change each time and it's often not a symlink. The > >> permissions might not be applied to the actual device. > >> > >> Can you try your code as root? sudo /opt/owfs/bin/.... > >> > >> Paul Alfille > >> > > > > > > > ------------------------------------------------------------------------------ > > _______________________________________________ > > Owfs-developers mailing list > > Owfs-developers@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/owfs-developers > > > > > > > > ------------------------------------------------------------------------------ > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/owfs-developers >
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