RTEMS 4.7.99.2 On-Line Library

Example Application
RTEMS C User's Guide
Chapter 28: Example Application

/*
 *  This file contains an example of a simple RTEMS
 *  application.  It instantiates the RTEMS Configuration 
 *  Information using confdef.h and contains two tasks:
 *  a *  user initialization task and a simple task.
 *
 *  This example assumes that a board support package exists.
 */

#include <rtems.h>

rtems_task user_application(rtems_task_argument argument);

rtems_task init_task(
  rtems_task_argument ignored
)
{
  rtems_id          tid;
  rtems_status_code status;
  rtems_name        name;

  name = rtems_build_name( 'A', 'P', 'P', '1' )

  status = rtems_task_create(
     name, 1, RTEMS_MINIMUM_STACK_SIZE,
     RTEMS_NO_PREEMPT, RTEMS_FLOATING_POINT, &tid
  );
  if ( status != RTEMS_STATUS_SUCCESSFUL ) {
    printf( "rtems_task_create failed with status of %d.\n", status );
    exit( 1 );
  }

  status = rtems_task_start( tid, user_application, 0 );
  if ( status != RTEMS_STATUS_SUCCESSFUL ) {
    printf( "rtems_task_start failed with status of %d.\n", status );
    exit( 1 );
  }

  status = rtems_task_delete( SELF );    /* should not return */
  printf( "rtems_task_delete returned with status of %d.\n", status );
  exit( 1 );
}


rtems_task user_application(rtems_task_argument argument)
{
  /* application specific initialization goes here */

  while ( 1 )  {              /* infinite loop */

    /*  APPLICATION CODE GOES HERE
     *
     *  This code will typically include at least one
     *  directive which causes the calling task to
     *  give up the processor.
     */
  }
}

#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER  /* for stdio */
#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER    /* for time services */

#define CONFIGURE_MAXIMUM_TASKS 2

#define CONFIGURE_INIT_TASK_NAME rtems_build_name( 'E', 'X', 'A', 'M' )
#define CONFIGURE_RTEMS_INIT_TASKS_TABLE

#define CONFIGURE_INIT

#include <confdefs.h>
RTEMS C User's Guide