[PLUG] Clinic - other dates? PLUG Digest, Vol 81, Issue 25

Bob Staser bobstaser at gmail.com
Sun Jun 19 09:49:16 PDT 2011


Will there be another clinic hosted by PLUG in the near future?
I have an LXE vehicle mount terminal that I'd like some help with.
I kinda threw out my back on Friday, and it's heavy enough that I' don't
really want to lift it today.
I looked at the Free Geek calendar, and they don't list today's clinic, or
any others.

Sorry if this is the wrong forum or format for my question, I'm new here.

Thanks!

Bob Staser
bobstaser at gmail.com 

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Subject: PLUG Digest, Vol 81, Issue 25

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Today's Topics:

   1. Re: Clinic! (Jeffery Mathis)
   2. Re: Clinic! (John Jason Jordan)
   3. Re: USB Serial Port Adapters (Fred James)
   4. Re: USB Serial Port Adapters (Jason Barnett)


----------------------------------------------------------------------

Message: 1
Date: Fri, 17 Jun 2011 20:00:44 -0700
From: Jeffery Mathis <jamathis79 at gmail.com>
Subject: Re: [PLUG] Clinic!
To: "General Linux/UNIX discussion and help,	civil and on-topic"
	<plug at lists.pdxlinux.org>
Message-ID: <BANLkTinX-_LbUXxe3LoCuUuYsQ50ZGCoWQ at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

I would be interested in helping out.
On Jun 17, 2011 4:05 PM, "John Jason Jordan" <johnxj at comcast.net> wrote:
> Yes, it's this Sunday, June 19!
>
> Do you have a Linux computer that's being a brat? Bring it to the 
> Clinic!
>
> Do you have a computer you'd like to install Linux on but need some 
> hand-holding? Bring it to the Clinic!
>
> We have meece, keyboards and monitors, so if it's a desktop all you 
> need to bring is the box. We also have the latest versions of all 
> major distros. And we'll even have coffee and munchables.
>
> And if you know Linux and would like to help people with their Linux 
> problems, we need you too. In fact, we may be short on experts this 
> time, so your appearance would be welcome.
>
> Where?
>
> Free Geek, 1741 SE 10th Avenue, Portland 97214.
>
> When?
>
> 1 to 5 pm, Sunday, June 19, 2011.
>
> _______________________________________________
> PLUG mailing list
> PLUG at lists.pdxlinux.org
> http://lists.pdxlinux.org/mailman/listinfo/plug


------------------------------

Message: 2
Date: Fri, 17 Jun 2011 20:18:30 -0700
From: John Jason Jordan <johnxj at comcast.net>
Subject: Re: [PLUG] Clinic!
To: plug at lists.pdxlinux.org
Message-ID: <20110617201830.1300ebcd at mailhost.pdx.edu>
Content-Type: text/plain; charset=US-ASCII

On Fri, 17 Jun 2011 20:00:44 -0700
Jeffery Mathis <jamathis79 at gmail.com> dijo:

>I would be interested in helping out.

Terrific!

No applications or approvals are required. Just show up.

Hope to see you there!


------------------------------

Message: 3
Date: Fri, 17 Jun 2011 22:45:58 -0500
From: Fred James <fredjame at fredjame.cnc.net>
Subject: Re: [PLUG] USB Serial Port Adapters
To: "General Linux/UNIX discussion and help; civil and on-topic"
	<plug at lists.pdxlinux.org>
Message-ID: <4DFC1F76.4020401 at fredjame.cnc.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Jackman wrote:
> Why can't udev rules be applied here?
>
> On Fri, Jun 17, 2011 at 6:48 PM, Fred James <fredjame at fredjame.cnc.net>
wrote:
>   
>> Tim Wescott wrote:
>>     
>>> (omissions for brevity)
>>>   I did an experiment: I started with my Fax modem and the board I'm 
>>> developing plugged in.  I did ls /dev/ttyU*.
>>> Then I unplugged the development board and did ls again.  Then I 
>>> plugged in a debugger that has its own USB serial port adapter, and 
>>> did ls again.  Here's my results:
>>>
>>> tim at servo:~$ ls /dev/ttyU*
>>> /dev/ttyUSB0  /dev/ttyUSB1
>>> tim at servo:~$ ls /dev/ttyU*
>>> /dev/ttyUSB0
>>> tim at servo:~$ ls /dev/ttyU*
>>> /dev/ttyUSB0  /dev/ttyUSB1
>>>
>>> What _did_ happen is that at different times the same device -- 
>>> ttyUSB1
>>> -- got mapped to different physical devices.  That is what I _do 
>>> not_ want to happen.  What I want to happen is to plug in the 
>>> development board and have /dev/ttyUSBdevelop appear, and to plug in 
>>> the debugger and have /dev/ttyUSBdebug appear (or some similar
me-defined mapping).
>>> Different devices.  Different, _unique_, identifiers.
>>>
>>> Otherwise, every time I plug a bunch of stuff in to the machine, I'm 
>>> going to have to do a bunch of hand work to figure out what ports 
>>> map to what devices at the moment.
>>>
>>>       
>> Tim Wescott
>> Thought 1:  If you can use CLI (command line interface) to determine 
>> what you need to know, then a (BASH) script can be written to do that.
>> Thought 2:  If a device can be identified (example: ttyUSB1 is the 
>> debugger), then it can be mounted to a directory (example: 
>> ~/debugger) Thought 3:  If 1 and if 2, then the two can be written
together in a script.
>> Does any of that help?
>> Regards
>> Fred James
>>     
Jackman
According to <http://reactivated.net/writing_udev_rules.html#about>, it can
...
"

udev rules are flexible and very powerful. Here are some of the things you
can use rules to achieve:

    * Rename a device node from the default name to something else
    * Provide an alternative/persistent name for a device node by
      creating a symbolic link to the default device node
    * Name a device node based on the output of a program
    * Change permissions and ownership of a device node
    * Launch a script when a device node is created or deleted
      (typically when a device is attached or unplugged)
    * Rename network interfaces

"
Regards
Fred James



------------------------------

Message: 4
Date: Sat, 18 Jun 2011 09:49:01 -0700
From: Jason Barnett <jason.barnett71 at gmail.com>
Subject: Re: [PLUG] USB Serial Port Adapters
To: "General Linux/UNIX discussion and help,	civil and on-topic"
	<plug at lists.pdxlinux.org>
Message-ID: <BANLkTi=36RjK7qKh4C=W7Z2oW1PgNhOSSQ at mail.gmail.com>
Content-Type: text/plain; charset=UTF-8

Here is a link that gives an example of this exact situation.  The example
shows using a FTDI chip and having the UDEV rule compare against the serial
number of the device so it should work for specific devices.

https://wiki.archlinux.org/index.php/Bus_pirate

Jason

On Fri, Jun 17, 2011 at 8:45 PM, Fred James
<fredjame at fredjame.cnc.net>wrote:

> Jackman wrote:
> > Why can't udev rules be applied here?
> >
> > On Fri, Jun 17, 2011 at 6:48 PM, Fred James 
> > <fredjame at fredjame.cnc.net>
> wrote:
> >
> >> Tim Wescott wrote:
> >>
> >>> (omissions for brevity)
> >>>   I did an experiment: I started with my Fax modem and the board 
> >>> I'm developing plugged in.  I did ls /dev/ttyU*.
> >>> Then I unplugged the development board and did ls again.  Then I
> plugged
> >>> in a debugger that has its own USB serial port adapter, and did ls 
> >>> again.  Here's my results:
> >>>
> >>> tim at servo:~$ ls /dev/ttyU*
> >>> /dev/ttyUSB0  /dev/ttyUSB1
> >>> tim at servo:~$ ls /dev/ttyU*
> >>> /dev/ttyUSB0
> >>> tim at servo:~$ ls /dev/ttyU*
> >>> /dev/ttyUSB0  /dev/ttyUSB1
> >>>
> >>> What _did_ happen is that at different times the same device -- 
> >>> ttyUSB1
> >>> -- got mapped to different physical devices.  That is what I _do 
> >>> not_ want to happen.  What I want to happen is to plug in the 
> >>> development board and have /dev/ttyUSBdevelop appear, and to plug 
> >>> in the debugger and have /dev/ttyUSBdebug appear (or some similar
me-defined mapping).
> >>> Different devices.  Different, _unique_, identifiers.
> >>>
> >>> Otherwise, every time I plug a bunch of stuff in to the machine, 
> >>> I'm going to have to do a bunch of hand work to figure out what 
> >>> ports map
> to
> >>> what devices at the moment.
> >>>
> >>>
> >> Tim Wescott
> >> Thought 1:  If you can use CLI (command line interface) to 
> >> determine what you need to know, then a (BASH) script can be written to
do that.
> >> Thought 2:  If a device can be identified (example: ttyUSB1 is the 
> >> debugger), then it can be mounted to a directory (example: 
> >> ~/debugger) Thought 3:  If 1 and if 2, then the two can be written 
> >> together in a
> script.
> >> Does any of that help?
> >> Regards
> >> Fred James
> >>
> Jackman
> According to <http://reactivated.net/writing_udev_rules.html#about>, 
> it can ...
> "
>
> udev rules are flexible and very powerful. Here are some of the things 
> you can use rules to achieve:
>
>    * Rename a device node from the default name to something else
>    * Provide an alternative/persistent name for a device node by
>      creating a symbolic link to the default device node
>    * Name a device node based on the output of a program
>    * Change permissions and ownership of a device node
>    * Launch a script when a device node is created or deleted
>      (typically when a device is attached or unplugged)
>    * Rename network interfaces
>
> "
> Regards
> Fred James
>
> _______________________________________________
> PLUG mailing list
> PLUG at lists.pdxlinux.org
> http://lists.pdxlinux.org/mailman/listinfo/plug
>


------------------------------

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