[yocto] TtyUsb Yocto Issue

[Jawad Hassan]

Correction device_table


On Wed, Oct 9, 2013 at 5:44 AM, Jawad Hassan
<jawad at emblemtechnologies.com>wrote:

> PS. /etc/device_list does show a ttyUSB entry
>
>
> On Wed, Oct 9, 2013 at 5:36 AM, Jawad Hassan <jawad at emblemtechnologies.com
> > wrote:
>
>> Hi Paul,
>>
>> Thanks for your reply, but we're not seeing any ttyUSB* entries in the
>> /dev folder, the board is this one here:
>> http://boundarydevices.com/products/nitrogen6_lite/
>>
>> Which should have at least one port available for connection.
>>
>> But unfortunately we aren't seeing this device node. What should be our
>> way forward with this?
>>
>> Thanks in advance!
>>
>>
>> On Tue, Oct 8, 2013 at 9:04 AM, Paul Eggleton <
>> paul.eggleton at linux.intel.com> wrote:
>>
>>> Hi Jawad,
>>>
>>> On Tuesday 08 October 2013 06:43:18 Jawad Hassan wrote:
>>> > We're trying to access the USB serial port using rxtx on a java
>>> application
>>> > on Yocto. The problem is that we're unable to list out any ports on the
>>> > Nitrogen Lite board, we think this could be a permissions issue, if
>>> anyone
>>> > has been able to do this or any resources that can help us in getting
>>> this
>>> > done.
>>>
>>> It's hard to say for sure without further details, but assuming the
>>> device
>>> nodes actually exist in /dev and it's a typical device permissions issue
>>> there
>>> are two options:
>>>
>>> 1) Look at the /dev/ttyUSB* device nodes that exist and see if there is
>>> already a group assigned with write access; if so you just need to
>>> ensure the
>>> user you are running as is a member of that group.
>>>
>>> 2) Create a udev rule to set the device permissions correctly. This
>>> would be a
>>> matter of creating a recipe to install an extra file to
>>> /etc/udev/rules.d that
>>> assigned the desired permissions. There are lots of HOWTOs out there on
>>> the
>>> web for this, e.g.:
>>>
>>>
>>> http://sourceforge.net/apps/mediawiki/gizmod/index.php?title=HOWTO_-_Setting_Input_Device_Permissions_-_Creating_a_udev_Rule
>>>
>>> Cheers,
>>> Paul
>>>
>>> --
>>>
>>> Paul Eggleton
>>> Intel Open Source Technology Centre
>>>
>>
>>
>>
>> --
>> *Jawad Hassan*
>> Software Engineer
>> *Emblem Technologies (Pvt) Ltd*
>> *Uzair Pte Ltd, Singapore*
>> Skype: jawad at emblemtechnologies.com
>>
>> LinkedIn <http://www.linkedin.com/company/897097?trk=tyah> | Twitter<https://twitter.com/emblemtech>
>>  | Facebook <https://www.facebook.com/emblem.technologies>
>>
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>
>
>
> --
> *Jawad Hassan*
> Software Engineer
> *Emblem Technologies (Pvt) Ltd*
> *Uzair Pte Ltd, Singapore*
> Skype: jawad at emblemtechnologies.com
>
> LinkedIn <http://www.linkedin.com/company/897097?trk=tyah> | Twitter<https://twitter.com/emblemtech>
>  | Facebook <https://www.facebook.com/emblem.technologies>
>
> *This message contains confidential information and is intended only for
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>



-- 
*Jawad Hassan*
Software Engineer
*Emblem Technologies (Pvt) Ltd*
*Uzair Pte Ltd, Singapore*
Skype: jawad at emblemtechnologies.com

LinkedIn <http://www.linkedin.com/company/897097?trk=tyah> |
Twitter<https://twitter.com/emblemtech>
 | Facebook <https://www.facebook.com/emblem.technologies>

*This message contains confidential information and is intended only for
the individual named. If you are not the named addressee, you should not
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immediately by email if you have received this email by mistake and delete
this email from your system. Email transmission cannot be guaranteed to be
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destroyed, arrive late, incomplete, or contain viruses. The sender,
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