Joshua J. Kugler | 1 Nov 07:45 2010
X-Face

Faking trees in --tester mode

So, I'd like to construct a unit test that ensures my code walks a tree 
of sensors (such as might be hanging off of a DS2409.  However, 
the --tester parameter detailed at 
http://owfs.org/index.php?page=tester-adapter doesn't show a way to 
create a tree. In other words, all sensors show up on '/':

Simulated-Computed - /
DS18S20 - /10.000010EF0000
 DS1822 - /22.000022DD0100
 DS2781 - /3D.00003DC20200

A command line such as this:

./tree.py --tester=10,22,3D -u --tester=01,05,1F,11
(That's the example pythontree program from the OWFS source code)

Still only gives me:

Simulated-Computed - /
DS18S20 - /10.000010EF0000
 DS1822 - /22.000022DD0100
 DS2781 - /3D.00003DC20200

Is there a way to specify a tree in a --tester parameter?

Also, specifying the DS2409 family (1F) in the --tester list, causes 
this to happen:

 DS2409 - /1F.00001FE00000
 DS2409 - /1F.00001FE00000/main/1F.00001FE00000
(Continue reading)

Pascal Baerten | 1 Nov 08:42 2010
Picon

Re: Seg. fault in owhttpd and owfs reading BAE 910

Hi Jan,

I got similar issues with intermediate owfs version that introduced visibility feature.
The visibility feature allows to conditionally hide non relevant properties. This allows to show adaptive directory structure between bae0910 and bae0911 who share same family code.

This issue is fixed in the current cvs version.
You may consider to revert to previous release or to test with cvs version.

Pascal




2010/10/31 Jan Bertelsen <jb-owfs <at> w57.dk>
Hi all,

trying to read registers on the BAE 910 chip I get a segmentation fault in
owhttpd (see below) and owfs. I have no problem reading other devices on the
bus.

When I try to read the BAE chip using owfs:

ls /mnt/1wire/FC.000000000022/910

it's the same, owfs is crashing with the same debug information.

owhttpd and owfs are connected to the 1wire bus via owserver, which is running
as:

owserver -p 2125 -d /dev/ttyS0

owserver is not affected of the crash.

My setup is:
System: Ubuntu 8.04.4 LTS Hardy
OWFS: compiled from owfs-2.8p2.tar.gz
Bus master: LinkOEM (same as Link45) at /dev/ttyS0


Any hints are welcome as I'm not used to debug c programs.

Best regards

Jan

================================================

$ gdb owhttpd
run -s 2125 -p 2121 --debug
<..cut..>
 DEBUG: owhttpd_handler.c:handle_GET(151) Simple GET request -- read a value
or directory
 DEBUG: ow_dir.c:FS_dir(63) path=/FC.000000000022/910
  CALL: ow_dir.c:FS_dir_both(98) path=/FC.000000000022/910
 DEBUG: ow_cache.c:Cache_Get_Internal(884) FC 00 00 00 00 00 22 DE size=4
 DEBUG: ow_parseobject.c:OWQ_create_from_path(29) /FC.000000000022/910
  CALL: ow_parsename.c:FS_ParsedName_anywhere(90) path=[/FC.000000000022/910]
 DEBUG: ow_cache.c:Cache_Get_Device(855) FC 00 00 00 00 00 22 DE
 DEBUG: ow_cache.c:Cache_Get_Common(1067) Get from cache sn FC 00 00 00 00 00
22 DE pointer=0xb7efc920 index=0 size=4
 DEBUG: ow_cache.c:Cache_Get_Common(1076) value found in cache. Remaining
life: 117 seconds.
 DEBUG: ow_presence.c:CheckPresence(75) Found device on bus 0
 DEBUG: ow_parseobject.c:OWQ_create_sibling(62) Create sibling device_type
from /FC.000000000022/910 as /FC.000000000022/device_type
 DEBUG: ow_parseobject.c:OWQ_create_from_path(29) /FC.000000000022/device_type
  CALL: ow_parsename.c:FS_ParsedName_anywhere(90)
path=[/FC.000000000022/device_type]
 DEBUG: ow_cache.c:Cache_Get_Device(855) FC 00 00 00 00 00 22 DE
 DEBUG: ow_cache.c:Cache_Get_Common(1067) Get from cache sn FC 00 00 00 00 00
22 DE pointer=0xb7efc920 index=0 size=4
 DEBUG: ow_cache.c:Cache_Get_Common(1076) value found in cache. Remaining
life: 117 seconds.
 DEBUG: ow_presence.c:CheckPresence(75) Found device on bus 0
 DEBUG: ow_read.c:adjust_file_size(333) file_length=12 offset=0 size=1
 DEBUG: ow_parseobject.c:OWQ_create_sibling(62) Create sibling typestate from
/FC.000000000022/device_type as /FC.000000000022/typestate
 DEBUG: ow_parseobject.c:OWQ_create_from_path(29) /FC.000000000022/typestate
  CALL: ow_parsename.c:FS_ParsedName_anywhere(90)
path=[/FC.000000000022/typestate]
 DEBUG: ow_cache.c:Cache_Get_Device(855) FC 00 00 00 00 00 22 DE
 DEBUG: ow_cache.c:Cache_Get_Common(1067) Get from cache sn FC 00 00 00 00 00
22 DE pointer=0xb7efc920 index=0 size=4
 DEBUG: ow_cache.c:Cache_Get_Common(1076) value found in cache. Remaining
life: 117 seconds.
 DEBUG: ow_presence.c:CheckPresence(75) Found device on bus 0
 DEBUG: ow_read.c:adjust_file_size(333) file_length=12 offset=0 size=1
 DEBUG: ow_cache.c:Cache_Get(783) FC 00 00 00 00 00 22 DE size=8 IsUncachedDir=0
 DEBUG: ow_cache.c:Cache_Get_Common(1067) Get from cache sn FC 00 00 00 00 00
22 DE pointer=0xb7ef8a58 index=0 size=8
 DEBUG: ow_cache.c:Cache_Get_Common(1095) value not found in cache
 DEBUG: ow_select.c:BUS_select(72) Selecting a path (and device)
path=/FC.000000000022/typestate SN=FC 00 00 00 00 00 22 DE last path=FF 00
00 00 00 00 00 00
 DEBUG: ow_select.c:BUS_select(77) Clearing root branch

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb7cbfb90 (LWP 19258)]
0x00000000 in ?? ()
(gdb)



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Marcus Priesch | 1 Nov 11:36 2010
Picon

Re: OWFS roadmap

Hi Rob, 

this sounds like a great idea !

do you mind implementing this as a standalone "owfs diagnose tool" ?!?!

as i think it would be much easier to implement it (or at least start
building up a prototype) in something more high level to web-apps than C
currently is (e.g. python) besides this - it could be that such a
beautiful web-app could bring in unneeded complexity into owfs ... 

however, on the other hand the "python" approach would require more
processing power on the target compared to a C-only solution ... this
could be overcome if you run it on a different host (e.g. laptop) and
communicate over tcp/ip with a owserver process on the target ... wow
that rocks !!! amazingly what can be done with owfs's design !!!!

what do you others think about this ?!?!

i can think of hacking together a prototype after 01/2011 ... using
web.py and pyowfs to display all kinds of things ... 

however i think the design should be discussed more in detail - how
"graphical" we all want the thing to be ... 

  - navigation should be easy and intuitive
  - it should be possible to visualize a system with *many* devices
  - there propably will be more than one bus master - on different
    busses
  - if it should replace the current owhttpd - it should also provide 
    "not so graphical" display modes ... maybe ;)

in the end - when everone's confident - it should "easily" be possible
to transfer the whole thing into C code and incorporate it in
owfs ... ;)

regards,
m.

Am Sonntag, den 31.10.2010, 17:50 +1100 schrieb Rob Conway:
> I had assumed that any bugs would over time be corrected however my question
> was more if there was a longer term plan.  As you switched the question back
> around I was now thinking about this myself as a back end service it does a
> great job.
> 
> If I were to put up a wish list it would be owhttpd.  Although everybody has
> different needs and their own applications I do rely on owhttpd for fault
> finding the physical bus and to show device parameters,  which I assume
> others are as well.  I would like to see a more graphical owhttpd
> implementation and for it to show the bus master, hub's and devices hanging
> off a bus.  Each device (simply shown as a colored square box) could show
> its primary variable (TEMP, PIO or ADC) and maybe the bus line itself could
> show packets and % error rates.  The devices shown on the bus could be drawn
> from something like the alias file, that way if a device dropped off the bus
> you could see it in error and show it as failed.  I know this is going down
> more an application line and not enhancing the fundamental use of owfs
> however it could enhance every bodies implementation and user experience.
> 
> The other thing interesting was your thoughts on RS485 for the AAG weather
> station.
> 
> 
> rob
> 
> 
> -----Original Message-----
> From: Paul Alfille [mailto:paul.alfille <at> gmail.com] 
> Sent: Friday, October 29, 2010 12:11 PM
> To: OWFS (One-wire file system) discussion and help
> Subject: Re: [Owfs-developers] OWFS roadmap
> 
> 
> Good question about the roadmap:
> 
> 1. Fix current issues (like the rwlock, alias, and LinkUSB).
> 2. Fill in rest of slave support (Thermocron, Humidicron, DS2435, ...) 3.
> Support for the AGG RS485 weather station. 4. Support for Pascal's new
> BAE0911 5. Support for the EDS ENET-OWSERVER (works but needs tuning) 6.
> Support for some 3rd party slaves in the pipeline.
> 
> Some platforms are problematic to build on, and libtool seems to change and
> deprecate features all the time. It would be nice to make that more robust.
> 
> Are there other features that we should aim for?
> 
> Paul Alfille
> 
> 
> On Thu, Oct 28, 2010 at 8:59 PM, Paul Alfille <paul.alfille <at> gmail.com>
> wrote:
> > On Thu, Oct 28, 2010 at 4:54 AM, Rob Conway <rjconway <at> bigpond.com> 
> > wrote:
> >> Hi,
> >>
> >> Just wondering if there was an update on the roadmap for OWFS.  It 
> >> does everything I want it to do however was just wondering if there 
> >> was any significant changes in the pipeline over the next 6 - 12 
> >> months.
> 
> ----------------------------------------------------------------------------
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Joshua J. Kugler | 1 Nov 22:53 2010
X-Face

Re: DS18S20 reads 85

On Wednesday 06 October 2010, Mick Sulley elucidated thus:
> Hi,
>
> I have a little test system on my desk, it has a DS9097U adapter, 2
> DS18S20 sensors, 2 DS18B20 sensors and 2 DS2406 2 channel i/o units. 
> I am using one channel of one of the DS2406 to switch a relay and I
> have an external 5v supply for this.
>
> I have a python program using pyowfs that just cycles through reading
> the temperatures and alternately setting the output on or off.
>
> If I have the 1 wire network in parasitic mode it all works fine,
> however if I use the external power supply to feed the 1 wire as
> well, which feels like the right thing to do, the 2 DS18S20 sensors
> return 85 all the time.

I had this issue on a string plugged in to a USB adapter.  One or more 
of the sensors would read 85.  It seemed I could "fix" it sometimes by 
fiddling with the string, suggesting that maybe there was a short in 
the string, or in the soldering on the sensor's wires.

That's as far as I got, hope that helps some.

j

--

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Joshua J. Kugler | 1 Nov 22:58 2010
X-Face

Re: Can't Get OWFS to work

On Monday 18 October 2010, Norman Elliott elucidated thus:
> Don't know if you have this working yet but I had a problem with this
> and it was because owfs needs python 2.4 and Ububtu 10.04 comes with
> python 2.6.

OWFS runs just fine with Python 2.6. I'm using 2.8p2 (and fixing the 
indent error in the Python module) and all works just fine.

j

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Joshua J. Kugler | 1 Nov 23:06 2010
X-Face

Re: 2.8p2 : Indentation error in module/swig/python/ow/__init__.py

Yup, it's a bug. Patch is attached.

Paul, could this be applied soon (if it hasn't already)?

j

On Wednesday 27 October 2010, Fritz SMH elucidated thus:
> Hello,
> I didn't find the bug tracker, so I report my bug here (maybe you
> already now it..)
>
> After installing owfs 2.8p2, when trying to import module "ow" in
>
> python, we got an error :
> >>> import ow
>
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "/usr/lib/python2.6/dist-packages/ow/init.py", line 348
> except KeyError:
> IndentationError: unindent does not match any outer indentation level
>
> When looking at module/swig/python/ow/__init__.py, I found this :
>
>     def __getattr__( self, name ):
>         """
>         Retreive an attribute from the sensor. __getattr__ is called
>         only if the named item doesn't exist in the Sensor's
>         namespace. If it's not in the namespace, look for the
> attribute on the physical sensor.
>
>         Usage:
>
>             s = ow.Sensor( '/1F.5D0B01000000' )
>             print s.family, s.PIO_0
>
>         will result in the family and PIO.0 values being read from
> the sensor and printed. In this example, the family would be 1F and
> thr PIO.0 might be 1.
>         """
>         #print 'Sensor.__getattr__', name
>         try:
>                     return owfs_get(object.__getattribute__(self,
> '_attrs')[name])
>                 except KeyError:
>             raise AttributeError, name
>
> As you can see, there really is an indentation error.
>
> Regards,
> Fritz

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Joshua J. Kugler | 1 Nov 23:29 2010
X-Face

Bug (?) in re init()'ing Python ow module.

Given the following code:

import sys
import ow

def tree( sensor ):
    print '%7s - %s' % ( sensor._type, sensor._path )
    for next in sensor.sensors( ):
        if next._type in [ 'DS2409', ]:
            tree( next )
        else:
            print '%7s - %s' % ( next._type, next._path )

if __name__ == "__main__":
    ow.init('--tester=28,28')
    tree( ow.Sensor( '/' ) )
    print 'New run'
    ow.finish()
    ow.init('--tester=28,28,28,28')
    tree( ow.Sensor( '/' ) )

I get this traceback:

ow.exUnknownSensor: 'bus.0/interface/settings/name'
File "/path/to/reinit-tree.py", line 22, in <module>
  tree( ow.Sensor( '/' ) )
File "/usr/lib/python2.6/dist-packages/ow/__init__.py", line 271, in 
__init__
  self.useCache( self._useCache )
File "/usr/lib/python2.6/dist-packages/ow/__init__.py", line 411, in 
useCache
  self._type    = owfs_get('bus.0/interface/settings/name')
File "/usr/lib/python2.6/dist-packages/ow/__init__.py", line 159, in 
_get
  raise exUnknownSensor(path)

Is the C API not fulling cleaning up when _OW.finish( ) is called?  Is 
there something I should be aware of?

j

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Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store 
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Jim Kusznir | 1 Nov 23:56 2010
Picon

Bug in memory read

Hi all:

I reported a problem a while ago with strange memory reads coming out
on the DS2406.  We have conducted more tests in my lab, and have more
information.

First, the problem:

When one reads "memory" on a DS2406 since the 2.8pX series (all
released patch levels so far), the first 1-2 characters are munged.
By munged, I mean that the character is something else than it is
supposed to be; there is still something in that location though.

This happens through both the fuse interface and the python module.

Strangely enough, if one reads pages.ALL, then the read is correct.

As I said, this occurred with the first release of 2.8 and is still
present with 2.8p2.

--Jim

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Paul Alfille | 2 Nov 03:16 2010
Picon

Re: Bug in memory read

Thank you for making this easily tested demonstration.

The bug seems to be in large (>64 byte) reads with the USB adapter,
and is now fixed.
pages.ALL actually read each 32 byte page and concatenated them, so didn't fail.

Paul Alfille

On Mon, Nov 1, 2010 at 6:56 PM, Jim Kusznir <jkusznir <at> gmail.com> wrote:
> Hi all:
>
>
> I reported a problem a while ago with strange memory reads coming out
> on the DS2406.  We have conducted more tests in my lab, and have more
> information.
>
> First, the problem:
>
> When one reads "memory" on a DS2406 since the 2.8pX series (all
> released patch levels so far), the first 1-2 characters are munged.
> By munged, I mean that the character is something else than it is
> supposed to be; there is still something in that location though.
>
> This happens through both the fuse interface and the python module.
>
> Strangely enough, if one reads pages.ALL, then the read is correct.
>
> As I said, this occurred with the first release of 2.8 and is still
> present with 2.8p2.
>
> --Jim
>
> ------------------------------------------------------------------------------
> Nokia and AT&T present the 2010 Calling All Innovators-North America contest
> Create new apps & games for the Nokia N8 for consumers in  U.S. and Canada
> $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing
> Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store
> http://p.sf.net/sfu/nokia-dev2dev
> _______________________________________________
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> Owfs-developers <at> lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/owfs-developers
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Create new apps & games for the Nokia N8 for consumers in  U.S. and Canada
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Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store 
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Paul Alfille | 2 Nov 03:23 2010
Picon

Re: Faking trees in --tester mode

You're right, "tester" (and "fake" and "mock") don't emulate the
DS2409 properties or directories.

In general the "fake" adapters aren't very faithful emulations of the
real devices.

That said, we've improved the properties in the past based on requests
(like making the simulated temperatures stay in a configurable range).
Would simulating the DS2409 directories be helpful?

Paul Alfille

On Mon, Nov 1, 2010 at 2:45 AM, Joshua J. Kugler <joshua <at> azariah.com> wrote:
> So, I'd like to construct a unit test that ensures my code walks a tree
> of sensors (such as might be hanging off of a DS2409.  However,
> the --tester parameter detailed at
> http://owfs.org/index.php?page=tester-adapter doesn't show a way to
> create a tree. In other words, all sensors show up on '/':
>
> Simulated-Computed - /
> DS18S20 - /10.000010EF0000
>  DS1822 - /22.000022DD0100
>  DS2781 - /3D.00003DC20200
>
> A command line such as this:
>
> ./tree.py --tester=10,22,3D -u --tester=01,05,1F,11
> (That's the example pythontree program from the OWFS source code)
>
> Still only gives me:
>
> Simulated-Computed - /
> DS18S20 - /10.000010EF0000
>  DS1822 - /22.000022DD0100
>  DS2781 - /3D.00003DC20200
>
> Is there a way to specify a tree in a --tester parameter?
>
> Also, specifying the DS2409 family (1F) in the --tester list, causes
> this to happen:
>
>  DS2409 - /1F.00001FE00000
>  DS2409 - /1F.00001FE00000/main/1F.00001FE00000
>  DS2409 - /1F.00001FE00000/main/1F.00001FE00000/main/1F.00001FE00000
>
> DS2409 - /1F.00001FE00000/main/1F.00001FE00000/main/1F.00001FE00000/main/1F.00001FE00000
>
> DS2409 - /1F.00001FE00000/main/1F.00001FE00000/main/1F.00001FE00000/main/1F.00001FE00000/main/1F.00001FE00000
>
> DS2409 - /1F.00001FE00000/main/1F.00001FE00000/main/1F.00001FE00000/main/1F.00001FE00000/main/1F.00001FE00000/main/1F.00001FE00000
>
> And so on...getting longer and longer.  It seems like a bug in the
> tester code.
>
> Insights appreciated!
>
> j
>
> --
> Joshua J. Kugler - Fairbanks, Alaska
> Azariah Enterprises - Programming and Website Design
> joshua <at> azariah.com - Jabber: pedahzur <at> gmail.com
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>
> ------------------------------------------------------------------------------
> Nokia and AT&T present the 2010 Calling All Innovators-North America contest
> Create new apps & games for the Nokia N8 for consumers in  U.S. and Canada
> $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing
> Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store
> http://p.sf.net/sfu/nokia-dev2dev
> _______________________________________________
> Owfs-developers mailing list
> Owfs-developers <at> lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/owfs-developers
>

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Nokia and AT&T present the 2010 Calling All Innovators-North America contest
Create new apps & games for the Nokia N8 for consumers in  U.S. and Canada
$10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing
Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store 
http://p.sf.net/sfu/nokia-dev2dev

Gmane