BTW: isn't your serial interface in TTL levels? Then you have to get a
converter, such as MAX3232
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1068 to connect the ds9097
adapter. Otherwise the signal level will be inverted to the 1-wire devices.
The signal is inverted in terms of electrical polarity. e.g. a ttl low will
generate a positive voltage on the RS232 TX output pin, a ttl high will
generate a negative RS232 TX. In the
<http://www.piclist.com/techref/io/serial/rs232sigs.htm> rs232 standard, a
low electrical level (-3 to -15 volts) is defined as a logic 1, or 'on' or
'high' and is referred to as 'marking.'
I guess it would be possible to add logic to read/write inverted levels in
OWFS, but that will require lots of re-writing. It's better to make sure you
have RS232-levels on your pins.
Read some more about serial-console cable at:
http://wiki.openwrt.org/OpenWrtDocs/Hardware/Netgear/WGT634U#head-6128a64e71
f6af2e38e2b1e0066d8b3c08d62d2a
/Christian
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Paul
Alfille
Sent: den 15 september 2007 07:25
To: owfs-developers@lists.sourceforge.net
Subject: Re: [Owfs-developers] MIPS vs MIPSEL in OWFS
Lets be systematic.
DS9097 or DS9097U
Any problems with permissions? (root?)
Try running with --error_level=9 --foreground and look at the starting
messages.
Paul Alfille
On 15 Sep 2007 01:05:34 -0000, suman sarkar <[EMAIL PROTECTED]>
wrote:
I tried some voltage sensing with DS2781K Maxim chip, which is connected to
a DS9097 serial adapter through RJ11.
I've installed all necessary software, but not been able to pull out any
information from the mounted directory (/mnt/1wire). My laptop's serial port
is set to baud rate 9600.
Here is what I did:
owfs -d /dev/ttyS0 /mnt/1wire.
This command does not give any error, and only creates a 1wire directory,
where I can see subdirectories: bus.0, settings, structure, statistics,
system, and uncached.
Even "cat /dev/ttyS0" does not show any information on ttyS0 port.
So, I am at a loss ... Is DS2781K a owfs supported device ... or am I
missing something? .... Any help will be helpful.
<http://adworks.rediff.com/cgi-bin/AdWorks/click.cgi/www.rediff.com/signatur
e-home.htm/[EMAIL PROTECTED]/1411820_1405315/1411271/1?PARTNER=3&OAS_QUERY=
null+target=new+> Error! Filename not specified.
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