problem starting a rtems task
Martínez, Pablo
pabloa.mar at gmail.com
Fri Jun 27 14:44:34 UTC 2014
On 26 June 2014 18:54, Joel Sherrill <joel.sherrill at oarcorp.com> wrote:
>
> On 6/26/2014 4:48 PM, Martínez, Pablo wrote:
>
>
>
>
> On 26 June 2014 18:28, Chris Johns <chrisj at rtems.org> wrote:
>
>> On 26/06/2014 11:54 pm, Martínez, Pablo wrote:
>>
>>>
>>>
>>>
>>> On 26 June 2014 08:37, Chris Johns <chrisj at rtems.org
>>> <mailto:chrisj at rtems.org>> wrote:
>>>
>>>
>>>
>>> On 26/06/2014 12:56 am, Martínez, Pablo wrote:
>>>
>>> Hi,
>>>
>>> Im having troubles trying to use the class rtemsTask from the the
>>> librtems++.
>>>
>>> (
>>>
>>> https://github.com/atgreen/__RTEMS/blob/master/c/src/__librtems%2B%2B/include/rtems%__2B%2B/rtemsTask.h
>>>
>>> <
>>> https://github.com/atgreen/RTEMS/blob/master/c/src/librtems%2B%2B/include/rtems%2B%2B/rtemsTask.h
>>> >
>>> )
>>>
>>> This class is basically a wrapper for the rtems task api.
>>>
>>> I can create the task successfully (its returns 0), but when I
>>> call
>>> start() the entry point origin doesnt start despite returning 0
>>> (this
>>> method just write a memory position to check if the task is
>>> working).
>>>
>>>
>>> const rtems_status_code rtemsTask::start(const
>>> rtems_task_argument arg)
>>>
>>>
>>> {
>>> if (owner)
>>>
>>>
>>> {
>>> argument = arg;
>>>
>>>
>>> // pass the this pointer as the argument
>>> set_status_code(rtems_task___start(id,
>>> origin,
>>> (rtems_task_argument) this));
>>>
>>>
>>> }
>>> else
>>> set_status_code(RTEMS_NOT___OWNER_OF_RESOURCE);
>>>
>>> return last_status_code();
>>>
>>>
>>> }
>>>
>>> Any help?
>>>
>>>
>>> Are the priorities ok ? If not it might not be able to run.
>>>
>>>
>>> Im using this parameters to create the task:
>>>
>>> "SELF"
>>> 1 (priority)
>>> RTEMS_MINIMUM_STACK_SIZE
>>> RTEMS_NO_PREEMPT
>>> 0
>>> RTEMS_NO_FLOATING_POINT
>>> RTEMS_LOCAL
>>>
>>>
>>> In C implementation is working fine, but the problem comes with C++.
>>>
>>>
>> I would need a more complete example to know what is happening.
>>
>>
> Chris,
>
> Im trying to use the rtems++ library as follows:
>
>
> //////////////Tempo.h
>
> #ifndef TEMPO_H_
> #define TEMPO_H_
>
> #include <rtems++/rtemsTask.h>
> #include <rtems++/rtemsTaskMode.h>
>
> class Tempo: public rtemsTask
> {
> public:
> Tempo(const char* name,
> const rtems_task_priority initial_priority,
> const uint32_t stack_size,
> const rtems_mode preemption = RTEMS_NO_PREEMPT,
> const rtems_mode timeslice = RTEMS_NO_TIMESLICE,
> const rtems_mode asr = RTEMS_NO_ASR,
> const rtems_interrupt_level interrupt_level = 0,
> const FloatingPoint floating_point = fpoff,
> const Scope scope = local);
>
> virtual ~Tempo();
> //rtems_task origin(rtems_task_argument argument);
>
> const rtems_status_code start(const rtems_task_argument argument);
> static rtems_task origen(rtems_task_argument argument);
> void cuerpo(rtems_task_argument argument);
>
> private:
>
> // task name
> rtems_name name;
> char name_str[5];
>
> // owner, true if this object owns the task
> // will delete the task when it destructs
> bool owner;
>
> // the rtems id, object handle
> rtems_id id;
>
> // the argument for the task, this class uses the actual argument
> // passed to RTEMS
> rtems_task_argument argument;
>
> };
>
> #endif /* TEMPO_H_ */
>
>
> //////////////Tempo.cpp
>
> #include "Tempo.h"
>
> Tempo::Tempo(const char* tname,
> const rtems_task_priority initial_priority,
> const uint32_t stack_size,
> const rtems_mode preemption,
> const rtems_mode timeslice,
> const rtems_mode asr,
> const rtems_interrupt_level interrupt_level,
> const FloatingPoint floating_point,
> const Scope scope)
> : name(rtems_build_name('S', 'E', 'L', 'F')),
> owner(true),
> id(RTEMS_SELF),
> argument(0)
> {
> strcpy(name_str, "SELF");
> create(tname,
> initial_priority,
> stack_size,
> preemption,
> timeslice,
> asr,
> interrupt_level,
> floating_point,
> scope);
> }
>
>
> Tempo::~Tempo()
> {
> }
>
>
> const rtems_status_code Tempo::start(const rtems_task_argument arg)
> {
>
> argument = arg;
> // pass the this pointer as the argument
> set_status_code(rtems_task_start(id,origen,(rtems_task_argument)
> this));
>
> printf (" ---Tempo::start --- \n\n");
>
> return last_status_code();
> }
>
>
> rtems_task Tempo::origen(rtems_task_argument argument)
> {
> //just for debugging:
> unsigned *regout;
> regout= (unsigned*)0x80000d04;
> (*regout)=0x12345678;
>
> printf (" --- Tempo::origen --- \n\n");
>
> Tempo *task = (Tempo*) argument;
> task->cuerpo(task->argument);
>
> }
>
> void Tempo::cuerpo(rtems_task_argument )
> {
> printf (" --- Tempo::do sth --- \n\n");
> }
>
>
> ::::::::::
>
> " ---Tempo::start --- \n\n" gets printed, but origen() is not triggered.
>
>
> Trying to solve this out, Im trying with one solution I just found (from
> you!)
> You use a thread template. I just found it so I haven't tested it yet.
>
> http://comments.gmane.org/gmane.os.rtems.user/20625
>
>
> This is still not complete. There has to be an initialization task and
> some RTEMS configuration (e.g. CONFIGURE_xxx followed by
> an include of <rtems/confdefs.h>).
>
> My first guess is that you have an Init task at priority 1 sitting
> in a loop watching for something to happen. It won't happen
> because it never yields the processor.
>
> An alternative is that the Init() task falls off the bottom of its
> body and this is a fatal error halting the system.
>
> If we saw the Init() and configuration that goes with this
> it would really help. Something invokes your Tempo
> constructor.
>
> --joel
>
>
#define CONFIGURE_INIT
#include <rtems.h>
#include <rtems++/rtemsTask.h>
#include <rtems++/rtemsTaskMode.h>
#include </opt/rtems-4.10/sparc-rtems4.10/leon3/lib/include/bsp.h> /* for
device driver prototypes */
#include <tmacros.h>
extern "C"
{
rtems_task Init(
rtems_task_argument argument
);
}
#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
#define CONFIGURE_MAXIMUM_TASKS 10
#define CONFIGURE_MAXIMUM_TIMERS 5
#define CONFIGURE_MAXIMUM_SEMAPHORES 5
#define CONFIGURE_RTEMS_INIT_TASKS_TABLE
#define CONFIGURE_INIT_TASK_STACK_SIZE (6 * RTEMS_MINIMUM_STACK_SIZE)
#define CONFIGURE_EXTRA_TASK_STACKS (13 * RTEMS_MINIMUM_STACK_SIZE)
//#include
</opt/rtems-4.10/sparc-rtems4.10/leon3/lib/include/rtems/confdefs.h>
#include <rtems/confdefs.h>
#include "Tempo.h"
rtems_task Init(rtems_task_argument )
{
printf (" --- Rtems++ V 1.1 --- \n\n");
Tempo
t1("SELF",1,RTEMS_MINIMUM_STACK_SIZE,RTEMS_NO_PREEMPT,0,RTEMS_NO_FLOATING_POINT,RTEMS_LOCAL);
printf("Tempo::initial status: %d \n",t1.last_status_code());
printf("Tempo::started: %d \n",t1.start(1));
printf (" --- FIN --- \n\n");
exit(0);
}
Using grmon I can see the program exits normally.
Pablo
>
>
> cheers,
> Pablo
>
>
>
>> Chris
>>
>> thank u,
>>> P
>>>
>>>
>>>
>>> Chris
>>>
>>> best regards,
>>>
>>>
>>>
>>> --
>>> Martínez, Pablo Agustín
>>>
>>>
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>>>
>>>
>>>
>>> --
>>> Martínez, Pablo Agustín
>>>
>>
>
>
> --
> Martínez, Pablo Agustín
>
>
> --
> Joel Sherrill, Ph.D. Director of Research & Developmentjoel.sherrill at OARcorp.com On-Line Applications Research
> Ask me about RTEMS: a free RTOS Huntsville AL 35805
> Support Available (256) 722-9985
>
>
--
Martínez, Pablo Agustín
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