Re: [Xenomai-help] Keyboard IRQ

[Antoine Nourry <nourry@domain.hid>]

Sorry for my blurred question, i just wanted to point out the fact that 
i managed to use most of Xenomai API functionalities when i was working 
on an RTDM USB driver. However during my scattered tests i never managed 
to catch properly IRQ 1 (i use a standard keyboard here). The goal is to 
measure time reaction from the moment an image appears to the keypress 
event.  Several months ago i asked you how to achieve this and wasn't 
aware at all of the domain switching when calling non realtime functions 
while being in RT mode. Thus i mixed non realtime and realtime functions 
in the same realtime task... and among them there were different 
keyboard event catch functions whichever are all non RT. I want a 
deterministic program that could rely on Xenomai source clock and on its 
IRQ handling in order to know when to take the measure.

I first want to know if this could be a good way to do so or if i'm 
totally wrong.

Secondly, i just made some new tests from the irq user example and 
rt_intr_wait returns -38 (is it ENOSYS = function not implemented ?) Do 
i have to compile some functionality in the kernel or during Xenomai 
install ?

Thank you again,
Antoine

Gilles Chanteperdrix a écrit :
> Antoine Nourry wrote:
>   
>> Hi,
>> i need to catch a key press as soon as it is released. What is the best 
>> solution ?
>> I tried to catch keyboard irq (#1) but failed. The ISR doesn't seem to 
>> launch...
>>
>> I made an RTDM driver successfully (with USB4RT) but never managed to do 
>> that simple thing...
>>     
>
> I do not understand your mail. If you use an USB keyboard, then it will
> certainly not trigger the IRQ 1.
>
> And given the precision of your question, all we can answer is that you
> should read the RTDM driver API documentation.
>
> See:
> http://www.catb.org/~esr/faqs/smart-questions.html
>
>