37. Example ApplicationΒΆ

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/*
*  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>