39. Example ApplicationΒΆ

 1 /*
 2 *  This file contains an example of a simple RTEMS
 3 *  application.  It instantiates the RTEMS Configuration
 4 *  Information using confdef.h and contains two tasks:
 5 *  a user initialization task and a simple task.
 6 */
 7 
 8 #include <rtems.h>
 9 
10 rtems_task user_application(rtems_task_argument argument);
11 
12 rtems_task init_task(
13     rtems_task_argument ignored
14 )
15 {
16     rtems_id          tid;
17     rtems_status_code status;
18     rtems_name        name;
19 
20     name = rtems_build_name( 'A', 'P', 'P', '1' )
21 
22     status = rtems_task_create(
23         name, 1, RTEMS_MINIMUM_STACK_SIZE,
24         RTEMS_NO_PREEMPT, RTEMS_FLOATING_POINT, &tid
25     );
26     if ( status != RTEMS_SUCCESSFUL ) {
27         printf( "rtems_task_create failed with status of %d.\n", status );
28         exit( 1 );
29     }
30 
31     status = rtems_task_start( tid, user_application, 0 );
32     if ( status != RTEMS_SUCCESSFUL ) {
33         printf( "rtems_task_start failed with status of %d.\n", status );
34         exit( 1 );
35     }
36 
37     status = rtems_task_delete( SELF );    /* should not return */
38 
39     printf( "rtems_task_delete returned with status of %d.\n", status );
40     exit( 1 );
41 }
42 
43 rtems_task user_application(rtems_task_argument argument)
44 {
45     /* application specific initialization goes here */
46     while ( 1 )  {              /* infinite loop */
47         /*  APPLICATION CODE GOES HERE
48          *
49          *  This code will typically include at least one
50          *  directive which causes the calling task to
51          *  give up the processor.
52          */
53     }
54 }
55 
56 /* The Console Driver supplies Standard I/O. */
57 #define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
58 /* The Clock Driver supplies the clock tick. */
59 #define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
60 #define CONFIGURE_MAXIMUM_TASKS 2
61 #define CONFIGURE_INIT_TASK_NAME rtems_build_name( 'E', 'X', 'A', 'M' )
62 #define CONFIGURE_RTEMS_INIT_TASKS_TABLE
63 #define CONFIGURE_INIT
64 #include <rtems/confdefs.h>