root.c

TM1300/PNX1300系列DSP（主要用于视频处理）操作系统pSOS系统的几个demo

/*
 *  COPYRIGHT (c) 1995,2000 TriMedia Technologies Inc.
 *
 *   +-----------------------------------------------------------------+
 *   | THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY ONLY BE USED |
 *   | AND COPIED IN ACCORDANCE WITH THE TERMS AND CONDITIONS OF SUCH  |
 *   | A LICENSE AND WITH THE INCLUSION OF THE THIS COPY RIGHT NOTICE. |
 *   | THIS SOFTWARE OR ANY OTHER COPIES OF THIS SOFTWARE MAY NOT BE   |
 *   | PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY OTHER PERSON. THE   |
 *   | OWNERSHIP AND TITLE OF THIS SOFTWARE IS NOT TRANSFERRED.        |
 *   +-----------------------------------------------------------------+
 *
 *  Module name              : root.c    1.12
 *
 *  Module type              : IMPLEMENTATION
 *
 *  Title                    : 
 *
 *  Author                   : Juul van der Spek 
 *
 *  Last update              : 15:03:06 - 00/06/19
 *
 *  Reviewed                 : 
 *
 *  Revision history         : 
 *
 *  Description              :  
 *
 */

/*----------------------------includes----------------------------------------*/

#include "sys_conf.h"
#include <stdio.h>
#include <psos.h>
#include <probe.h>

/*---------------------------- Functions -------------------------------------*/




ULONG sem_enter;
ULONG sem_exit;



void handler()
{
    fprintf(stderr,"******************BOEM\n");
    as_return();
}


void catch() {
    printf("catcher active\n");
    as_catch( handler, T_PREEMPT | T_TSLICE | T_ASR | T_ISR );
    t_suspend(0L);
}




void aaaa()
{
   int err;

   printf("aaaaaaa\n");
    as_catch( handler, T_PREEMPT | T_TSLICE | T_ASR | T_ISR );

   do {
      err  = sm_v( sem_enter );
      err |= sm_p( sem_exit,   SM_WAIT, 0 );
      printf("TOKEN SENT\n");
   } while (!err);

   printf("bbbbbbb\n");

   _psos_exit(0);
}




/*
 * At initialistion, pSOS starts two tasks, the IDLE
 * task, which does nothing but spinning at the lowest
 * possible priority, and the ROOT task, which starts
 * executing at the highest possible priority with
 * a user provided function with prescribed name 'root'
 * Root should bring up your tasking systm.
 * NOTE that task functions in pSOS are not allowed 
 * to terminate other than with a t_suspend(0) or a
 * t_delete(0):
 */

void root(void)
{
   int i;

   ULONG task1, task2;

   printf("Hello, world at time= %d us\n", clock());

   t_create( "aaaa",
                 4,
                 10000,
                 10000,
                 0,
                 &task1
   );



   t_create( "catc",
                 100,
                 10000,
                 10000,
                 0,
                 &task2
   );

   sm_create(
            "semp",
            1,
            SM_PRIOR,
            &sem_enter
   );


   sm_create(
            "semv",
            1,
            SM_PRIOR,
            &sem_exit
   );

   sm_p( sem_exit,  SM_WAIT, 0 );
   sm_p( sem_enter, SM_WAIT, 0 );

   t_start( task1, T_PREEMPT | T_TSLICE | T_ASR | T_ISR, aaaa,  0 );
   t_start( task2, T_PREEMPT | T_TSLICE | T_ASR | T_ISR, catch, 0 );

   for (i=1; i<10; i++) {
      sm_p( sem_enter, SM_WAIT, 0 );
      sm_v( sem_exit );
      printf("TOKEN RECEIVED\n");
      as_send(task1,1);
      as_send(task2,1);
   }

   sm_delete(sem_enter);
   sm_delete(sem_exit);

   printf("Goodbye, world\n");

   t_suspend(0L);
}