interrupt example leon3
yaron o
jaron0123 at gmail.com
Tue Oct 24 09:59:07 UTC 2017
Ok i got it !
thanks a lot for the help jan !
Yaron .
On Mon, Oct 23, 2017 at 6:02 PM, <Jan.Sommer at dlr.de> wrote:
>
> > -----Original Message-----
> > From: yaron o [mailto:jaron0123 at gmail.com]
> > Sent: Monday, October 23, 2017 4:17 PM
> > To: Sommer, Jan
> > Cc: users at rtems.org
> > Subject: Re: interrupt example leon3
> >
> > Ok thank you ,
> >
> > i succeeded to implement the interrupt on leon 3 ,thats what i added if
> some
> > one want to update the rtems-irq.c in sample file and add also:
> > ...
> > ...
> > #elif defined(LEON3)
> > *(unsigned long *) (0x80000240) = 0xc; // for leon 3
> > *(unsigned long *) (0x80000208) = 0xc; // for leon 3
> > #endif
> > ...
> > ...
> > in edition the printk instead of printf works for me either!
> >
> >
> > but still something missing for me and if some have an enswre it will be
> great ,
> > the question is why 0xc ?
> > i cant find anything that relate to the 0x12 (rtems_vector_number in
> > the rtems_interrupt_catch ).
>
> That's what I meant with the hint in my previous email.
> If you set the interrupt mask register to 0xC you set the interrupt #2 and
> #3.
> In the gr712rc manual that would mean the APBUART and the interrupt for
> the GPIO as described in table 2.
> The interrupt ids used in RTEMS seem to be in accordance to the SparcV8
> standard (table 7-1), i.e. they start with 0x11 for interrupt level 1.
> That's why if you want to capture interrupt #2 and #3 from the gr712rc
> manual you have to pass the ids 0x12 and 0x13 respectively.
> Interrupt ids from 0x00 to 0x10 are reserved for the standardized sparc
> traps.
>
> >
> > thanks again to all
> > Yaron
> >
> >
> > On Mon, Oct 23, 2017 at 12:29 PM, <Jan.Sommer at dlr.de> wrote:
> > Hi Yaron,
> >
> > > -----Original Message-----
> > > From: users [mailto:users-bounces at rtems.org] On Behalf Of yaron o
> > > Sent: Monday, October 23, 2017 10:21 AM
> > > To: users at rtems.org
> > > Subject: interrupt example leon3
> > >
> > > Hello all
> > >
> > > I want to add a new interrupt in my program , i check the rtems sample
> folder
> > in
> > > order to see how to add one ,i found the rtems-irq.c file and i did as
> the file
> > says
> > > but im using a leon 3 and theirs it says: error Example not intended
> for LEON3
> > > CPU.
> > > my question's are:
> > > firs how to call an interrupt in leon3 after i put it inside the ISR
> table, (i know
> > that
> > > in some OS you just write asm {INT #} in order to invoke the
> interrupt).
> > >
> >
> > In rtems the low level interrupts are handled by the OS and forwarded to
> the
> > function you
> > registered with rtems_interrupt_catch.
> >
> > > second i need some explain for the lines :
> > > *(unsigned long *) (0x80000090) = 0xc;
> > >
> > > *(unsigned long *) (0x80000098) = 0xc;
> > >
> >
> > Checking the processor manual of the Leon2 these appear to be the
> registers of
> > the interrupt controller (interrupt mask and interrupt force register).
> > You might have to setup the interrupt controller of your Leon3 in a
> similar
> > manner for the example to work.
> >
> > > in code below because i don't quit understand it ( maybe it's invoke
> the
> > interrupt
> > > but how does it relate to the handleExternalIrq) .
> > >
> >
> > As far as I see it first registers the function handleExternalIrq to the
> interrupts
> > with id 0x12 and 0x13 using rtems_interrupt_catch.
> > Then it enables those interrupts in the interrupt controller (write to
> > 0x80000090).
> > Finally it triggers the interrupts by writing to the interrupt force
> register
> > (0x80000098).
> > The interrupt should occur, being noticed by rtems and the
> handleExternalIrq-
> > function should be called to handle the interrupt.
> > I had some problems with calling printf from within ISRs. I would
> replace it with
> > printk just to be sure.
> >
> > One hint regarding the Leon3: In the gr712rc user manual the interrupt
> numbers
> > defined there are mapped in RTEMS to ids starting with 0x10 + irq#.
> > Meaning e.g. the AHBSTAT interrupt (number #1) will have the id 0x11 in
> RTEMS
> > and so on.
> >
> > Cheers,
> >
> > Jan
> >
> > > i add the rtems-irq.c bellow"
> > > ------------------------------------------------------------
> --------------
> > > #include <rtems.h>
> > > /* configuration information */
> > >
> > > #define CONFIGURE_INIT
> > >
> > > #include <bsp.h> /* for device driver prototypes */
> > >
> > > rtems_task Init (rtems_task_argument argument); rtems_isr
> handleExternalIrq
> > > (rtems_vector_number vector);
> > >
> > > #define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
> > > #define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
> > >
> > > #define CONFIGURE_MAXIMUM_TASKS 4
> > >
> > > #define CONFIGURE_RTEMS_INIT_TASKS_TABLE
> > >
> > > #define CONFIGURE_EXTRA_TASK_STACKS (3 *
> > > RTEMS_MINIMUM_STACK_SIZE)
> > >
> > > #include <rtems/confdefs.h>
> > >
> > > #include <stdlib.h>
> > > #include <stdio.h>
> > >
> > > rtems_task
> > > Init
> > > (
> > > rtems_task_argument argument
> > > )
> > > {
> > > rtems_status_code status;
> > > rtems_isr_entry old_handle;
> > >
> > > status = rtems_interrupt_catch (handleExternalIrq, 0x12,
> &old_handle);
> > > status = rtems_interrupt_catch (handleExternalIrq, 0x13,
> &old_handle);
> > >
> > > #ifdef __erc32__
> > > *(unsigned long *) (0x1f8004c) = 0x7ff0;
> > > *(unsigned long *) (0x1f800d0) = 0x80000;
> > > *(unsigned long *) (0x1f80054) = 0x0c;
> > > #elif defined(LEON2)
> > > *(unsigned long *) (0x80000090) = 0xc;
> > > *(unsigned long *) (0x80000098) = 0xc;
> > > #elif defined(LEON3) #error Example
> > > not intended for LEON3 CPU #endif
> > > exit(0);
> > > }
> > >
> > > rtems_isr
> > > handleExternalIrq
> > > (
> > > rtems_vector_number vector
> > > )
> > > {
> > > printf ("External interrupt received with vector 0x%x\n", vector);
> }
> > >
> > >
> > > ----------------------------------------------------------------
> > >
> > > thanks a lot for the helpers !
> > >
> > > Yaron .
> > >
> > >
> > >
> > > --
> > > signature-
> > >
> > 1.gif<https://lh4.googleusercontent.com/MAmpk4C_PMWbT3zd0qdOSQrjc8Z10
> > > rviGbNXOwcwHaQsEZMoMiIycSLYS_mSXnOqfEy2QkNLP1y-0gO-
> > > 6yHBGUZLK1jtiiU6IpMMOJT-bAVizgbQcyOwKWpJ6DM5a1K9PnjXrkv8>
> >
> >
> >
> >
> > --
> >
> >
> >
> >
> >
> >
> > Yaron Oz
> > R&D Software developer
> >
> > Asher Space Research Institute
> > Technion – Institute of Technology
> > Technion City, Haifa 32000, Israel
> >
> >
>
>
--
[image: signature-1.gif]
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