Vidarte Ana ([EMAIL PROTECTED]) wrote:
> Hello,
>
> Can someone send me an example of a real time application with a periodic
> task?
You need to use pthread_setfp_np(pthread_self(), 1) before
using any floating-point operations in an RT-thread.
Also, if Inicializa_modelo() and Finaliza_modelo() use FP-operations,
you need to move them in the thread code.
Michael.
>
> I have try the following:
>
> #include <rtl.h>
> #include <time.h>
> #include <pthread.h>
> #include <float.h>
> #include "modelo.h"
>
> pthread_t thread;
>
> void * start_routine(void *arg)
> {
> float salida;
> struct sched_param p;
> p . sched_priority = 1;
> pthread_setschedparam (pthread_self(), SCHED_FIFO, &p);
>
> pthread_make_periodic_np (pthread_self(), gethrtime(), 1000000);
>
> while (1) {
> Actualiza modelo():
> salida=Salida_modelo();
> pthread_wait_np ();
> rtl_printf("Salida %f\n", salida);
> }
> return 0;
> }
>
> int init_module(void) {
> Inicializa_modelo();
> return pthread_create (&thread, NULL, start_routine, 0);
> }
>
> void cleanup_module(void) {
> Finaliza_modelo();
> pthread_delete_np (thread);
> }
>
> But, the system crashes.
>
> Ana.
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