source: rtems/doc/user/example.texi @ 380daa25

@c
@c  COPYRIGHT (c) 1989-2011.
@c  On-Line Applications Research Corporation (OAR).
@c  All rights reserved.

@node Example Application, Glossary, Directive Status Codes, Top
@chapter Example Application

@example
/*
 *  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.
 */

#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.
     */
  @}
@}

/* The Console Driver supplies Standard I/O. */
#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER

/* The Clock Driver supplies the clock tick. */
#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER

#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 <rtems/confdefs.h>
@end example