Re: [Xenomai-help] rtdm driver development

[Jan Kiszka <jan.kiszka@domain.hid>]

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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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