Re: [Xenomai-help] Problem in irq_handle

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

robert165 wrote:
> 
> 
> 在2010-03-24 18:22:24，"Gilles Chanteperdrix" <gilles.chanteperdrix@domain.hid> 写道：
>>robert165 wrote:
>>> Hi Jan, I am new to xenomai, I am writing a gpio driver based on
>>> your "RTDM skeleton v1.1". There is a problem that when I complied
>>> and run your skeleton in a at91rm9200 broad with TIMERINT, the output
>>> is not show one line one second but very fast. The problem is still
>>> whenever I changed the following codes in demo_interrupt()
>>> 
>>> #ifdef TIMERINT if (events > XXX){ 
>>> rtdm_event_signal(&ctx->irq_event); event=0; } ... events++;
>>> 
>>> And, it seems likely in my own irq_handle of a gpio irq. When the irq
>>> arrive, the irq_handle repeats many times. Should I mask the same irq
>>> in irq_handle? I did it by write the PIO interrupt mask register, but
>>> no effect.
>>
>>Which interrupt is TIMERINT?
> 
> TIMERINT is timer interrupt.
> 
> It is in the demo of rtdm driver, the sourse is:
> 
> http://www.captain.at/xenomai-real-time-driver-example.php
> 
> Best wishes, 

Yes, but I was wondering which timer interrupt:
- if you are talking about the AT91 "system interrupt", it is shared
between several peripherals, including the DBGU serial port, and can not
be used in a real-time driver for this reason;
- if you are talking about the TC interrupt, it is handled by the
I-pipe, and you can not register a handler for your own driver either.

IOW, what value of TIMERINT do you use?

And I do not really understand why you use the timer interrupt. If you
are interested in interrupts coming from a GPIO, why not register a
handler for the GPIO interrupt?

Regards.

-- 
					    Gilles.