sending data to usb port

[Hiisi]

Hi!
Imagine I have some device connected to USB port. Is it possible to send
some code directly to that port?
Here's what I'm trying:
# echo "0" > /dev/bus/usb/004/010
-bash: echo: write error: Invalid argument

[Matthew Miller]

On Thu, Feb 04, 2016 at 06:45:57PM +0300, Hiisi wrote:
> Hi!
> Imagine I have some device connected to USB port. Is it possible to send
> some code directly to that port?
> Here's what I'm trying:
> # echo "0" > /dev/bus/usb/004/010
> -bash: echo: write error: Invalid argument

Sort of, but not like that. I'd recommend using PyUSB:
https://walac.github.io/pyusb/

[Jack Craig]

how about

you plug in your USB widget & identify the device node (/dev/sdc1, for
example).

say your src data is in /tmp/junk

# dd if=/tmp/junk of=/devsdc1    [any other args you might want to shape
the write and some error handing ( i think, it was a long time ago...)]

man dd    {for more options}

hth,....

On Thu, Feb 4, 2016 at 7:45 AM, Hiisi  wrote:
> Hi!
> Imagine I have some device connected to USB port. Is it possible to send
> some code directly to that port?
> Here's what I'm trying:
> # echo "0" > /dev/bus/usb/004/010
> -bash: echo: write error: Invalid argument
>
> Hiisi.
> Registered Linux User #487982. Be counted at: https://linuxcounter.net/
> --
> Spandex is a privilege, not a right.
>
> --
> users mailing list
> [e-mail]
> To unsubscribe or change subscription options:
> https://admin.fedoraproject.org/mailman/listinfo/users
> Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
> Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
> Have a question? Ask away: http://ask.fedoraproject.org

[Ted Roche]

On Thu, Feb 4, 2016 at 10:45 AM, Hiisi  wrote:
> Imagine I have some device connected to USB port. Is it possible to send
> some code directly to that port?

Try:

http://stackoverflow.com/questions/3526593/sending-raw-data-through-usb-on-l...

[Hiisi]

On 4 February 2016 at 22:43, Ted Roche  wrote:
> Try:
>
> http://stackoverflow.com/questions/3526593/sending-raw-data-through-usb-on-l...

Try what? Simple '>' doesn't work :(

[Hiisi]

On 4 February 2016 at 21:17, Jack Craig  wrote:
> how about
>
> you plug in your USB widget & identify the device node (/dev/sdc1, for
> example).
>
> say your src data is in /tmp/junk
>
> # dd if=/tmp/junk of=/devsdc1    [any other args you might want to shape
> the write and some error handing ( i think, it was a long time ago...)]
>
> man dd    {for more options}
>
> hth,....

Will check with dd. Thanks!

[Hiisi]

On 4 February 2016 at 18:54, Matthew Miller 
wrote:
> Sort of, but not like that. I'd recommend using PyUSB:
> https://walac.github.io/pyusb/

Thanks!
Any library like that for C++?

[Matthew Miller]

On Thu, Feb 04, 2016 at 11:25:21PM +0300, Hiisi wrote:
> > Sort of, but not like that. I'd recommend using PyUSB:
> > https://walac.github.io/pyusb/
>
> Thanks!
> Any library like that for C++?

Yes. Well, C. http://libusb.info/

[Hiisi]

On 5 February 2016 at 02:48, Matthew Miller 
wrote:
> Yes. Well, C. http://libusb.info/

Thanks a lot!
Stupid gmail webinterface doesn't allow me to change topic. Otherwise I
would mark the topic as [solved].

[Matthew Miller]

On Fri, Feb 05, 2016 at 03:06:19PM +0300, Hiisi wrote:
> > Yes. Well, C. http://libusb.info/
>
> Thanks a lot!
> Stupid gmail webinterface doesn't allow me to change topic. Otherwise I
> would mark the topic as [solved].

Well, it's a mailing list, so you can't really change the whole thread
topic. But you _can_, in gmail, change the subject any given reply by
clicking on the little drop-down triangle to the left of the address
bar in your reply.

[Ian Malone]

On 5 February 2016 at 13:24, Matthew Miller  wrote:
> On Fri, Feb 05, 2016 at 03:06:19PM +0300, Hiisi wrote:
> > > Yes. Well, C. http://libusb.info/
> >
> > Thanks a lot!
> > Stupid gmail webinterface doesn't allow me to change topic. Otherwise I
> > would mark the topic as [solved].
>
> Well, it's a mailing list, so you can't really change the whole thread
> topic. But you _can_, in gmail, change the subject any given reply by
> clicking on the little drop-down triangle to the left of the address
> bar in your reply.

Regrettably that will cause gmail to drop the references headers,
breaking threading for everyone reading it (or did last time I looked
at it). Doing it in a real mail client should work properly.