Am Donnerstag, 14. Dezember 2006 08:05 schrieb Heikki Lindholm:
> Niklaus Giger kirjoitti:
> > Hi
> >
> > I tried to use the FIT (Fixed Interrupt Timer) on my PPC405GPr board,
> > which uses 0x1010 as its interrupt vector in a user space (vxworks-skin)
> > application.
> > <..>
> > RT_INTR FITnterrupt;
> > res = rt_intr_create(&FITnterrupt, 0, 0x1010, I_NOAUTOENA);
> > <..>
> > But I got -22 EINVAL as error.
> > Could somebody please tell me, what is wrong with my example.
>
> The 0x1010 is the HW interrupt vector, but the argument should be the
> interrupt _line_. Besides, last time I checked, the ppc405 FIT isn't
> even 'wired' in the kernel; actually, there's no space for the interrupt
> prologue code, which basically results that no handler is called when
> the FIT interrupt occurs.
>
Thanks a lot for your tip.
I did now test using IPIPE_TRAP_UNKNOWN, where my main test routine looks like
this.
> int res, j;
> RT_INTR FITnterrupt;
> printf("\n%s:", __FUNCTION__);
> // res = rt_intr_create(&FITnterrupt, "sysAuxClk", 0x1010, I_NOAUTOENA);
> // returns -22 EINVAL
> res = rt_intr_create(&FITnterrupt, 0, IPIPE_TRAP_UNKNOWN, I_NOAUTOENA);
> perror("rt_intr_create returned " );
> printf("%s: rt_intr_create return %d errno %s\n", __FUNCTION__, res,
> strerror(res)); if (res != 0) exit(1);
>
> res = rt_intr_enable(&FITnterrupt);
> printf("%s: rt_intr_enable return %d errno %s\n", __FUNCTION__, res,
> strerror(res));
>
> for (j=0; j < 3; j++)
> {
> /* Timeout is one second in timer jiffies, as with vxworks we have the
> periodic time */ res = rt_intr_wait(&FITnterrupt, sysClkRateGet());
> printf("%s: rt_intr_wait return %d errno %s\n", __FUNCTION__, res,
> strerror(res)); }
> res = rt_intr_disable(&FITnterrupt);
> printf("%s: rt_intr_disable return %d errno %s\n", __FUNCTION__, res,
> strerror(res));
>
> res = rt_intr_delete(&FITnterrupt);
> printf("%s: rt_intr_delete return %d errno %s\n", __FUNCTION__, res,
> strerror(res)); exit(0);
My output at the target now looks like.
> __xeno_user_init: rt_intr_enable return 0 errno Success
> __xeno_user_init: rt_intr_wait return -110 errno Unknown error 4294967186
> __xeno_user_init: rt_intr_wait return -110 errno Unknown error 4294967186
> __xeno_user_init: rt_intr_wait return -110 errno Unknown error 4294967186
> __xeno_user_init: rt_intr_disable return 0 errno Success
> __xeno_user_init: rt_intr_delete return 0 errno Success
This is what I expect, as this interrupt should not occur.
IPIPE_TRAP_UNKNOWN however cannot be found in any *.h exported
to /usr/xenomai/include. I found it in include/asm-ppc/ipipe.h in the patched
Linux kernel.
So I suppose, that some how Xenomai should export this definition to user
space, too.
Dealing with FIT and other interrupts will take some more time. But I would
like to thank you and Wolfgang for your help, as your answers helped me a lot
to see the problem.
Best regards
--
Niklaus Giger
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