I've _solved_ my problem since a few days.
My code is available here: http://bachman.tor.lindesign.se/mthesis/code/comm/
What it does is that it makes it possible to write to a rtp0 device
file which then handles the periodic push and write to a rtser0.
Questions which still remain.
-Are there any problems setting a high value for the pipe task?
#define TASK_STKSZ_PIPETASK 50000
I use it when creating the task:
rt_task_create(&task3,"kernel_task3",TASK_STKSZ_PIPETASK,TASK_PRIO_PIPETASK,TASK_MODE);
Is it the size of data that the pipe can handle before it gets filled?
-Can I write data to the pipe( /dev/rtp0 ) using the outputstream from
java without any delays? In the example testa.java I do that, but I'm
working on getting that working from a data-generating thread. so that
there will be a continues quick write to the device.
-When is a outputstream.flush() needed? Is that after every single
command or just once at the end when all write():s are done?
/Bachman
On 30/09/2007, Jan Kiszka <[EMAIL PROTECTED]> wrote:
> Bachman Kharazmi wrote:
> > Hi
> > I've implemented a ringbuffer which will buffer strings between a
> > pipe-read-task=>[buffer]=>rtdm-rtserial-writetask
> >
> > The buffer has been implemented in userland and it works.
> > But in kernelspace (everything in a loaded in a kernel-module) things
> > doesn't work. It's the put(token) which doesn't work.
> > The function is put(char* c){ ... }
> >
> > I've heard that there's an address difference. But how do I handle that?
> >
> > http://www.xenomai.org/documentation/trunk/html/api/group__util.html#g9ce418051ccb7dd2366128efb8674262
> > is rtdm_strncpy_from_user() something I should use?
> >
> > exactlly what is: rtdm_user_info_t * else than a pointer?
> > Where do I declare it? There's no clickable link in the api for that that
> > type..
> >
> > The description sais: "User information pointer as passed to the
> > invoked device operation handler"
> > ...
>
> Please have a look at xenomai/examples/rtdm/driver-api. Those tutorial
> may give you some ideas. Feel free to suggest better descriptions of
> that field above.
>
> Jan
>
>
>
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