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Date: Wed, 5 Jun 2013 22:34:41 +0800 (CST)
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Subject: Re: [Xenomai] freescale(imx53)  with xenomai patch
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To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Cc: xenomai@xenomai.org

Now =EF=BC=8CI suddenly noticed,P and V operation must not be interrupted o=
peration. Before I did not know my colleague spent rt_sem_p () and rt_sem_v=
 ().
Today, I suddenly saw it.
I also would like to ask, rt_alarm_inquire is available in rt_sem_v () oper=
ation, timing counts?
Because they are in the case with a timer but also a very accurate timekeep=
ing pv operation.
=E5=9C=A8 2013-06-03 19:46:17=EF=BC=8C"Gilles Chanteperdrix" <gilles.chante=
perdrix@xenomai.org> =E5=86=99=E9=81=93=EF=BC=9A
>On 06/03/2013 10:24 AM, =E5=B5=8C=E5=85=A5=E5=BC=8F=E5=B7=A5=E7=A8=8B=E5=
=B8=88 wrote:
>
>> I have set the trigger type with Low trigger  and without disable and en=
able codes.
>> if the interrupt is triggered the hardware will set the gpio with High =
=E3=80=82
>> It has the same problem.
>> I do not why ?
>
>
>Ok, could you tell me:
>- what type you set for your interrupt (with irq_set_irq_type)?
>- what is the shape of the signal?
>
>Sorry for stating the obvious, but if the gpio is toggled every
>500milliseconds and you set the irq type to level (low or high), the
>interrupts is considered to be asserted by the interrupt controller
>during 500 milliseconds, and so your interrupt handler is called
>continuously during 500 milliseconds. In that case, what you would be
>interested in would be to call:
> irq_set_irq_type(irq, IRQ_TYPE_EDGE_BOTH)
>for instance.
>
>Regards.
>
>--=20
>                                                                Gilles.