mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
synced 2025-12-05 23:23:13 +00:00
adee597960
including a new section in the Getting Started called "Where to Go From Here", lots of index entries added, and more configuration table information.
109 lines
3.0 KiB
Plaintext
109 lines
3.0 KiB
Plaintext
@c
|
|
@c COPYRIGHT (c) 1988-1999.
|
|
@c On-Line Applications Research Corporation (OAR).
|
|
@c All rights reserved.
|
|
@c
|
|
@c $Id$
|
|
@c
|
|
|
|
@ifinfo
|
|
@node Example Application, Glossary, Directive Status Codes, Top
|
|
@end ifinfo
|
|
@chapter Example Application
|
|
|
|
@example
|
|
/* example.c
|
|
*
|
|
* This file contains an example of a simple RTEMS
|
|
* application. It contains a Configuration Table, a
|
|
* user initialization task, and a simple task.
|
|
*
|
|
* This example assumes that a board support package exists.
|
|
*
|
|
* Most applications will actually use the confdefs.h method
|
|
* to generate their configuration. This is provided primarily
|
|
* for reference.
|
|
*/
|
|
|
|
#include "rtems.h"
|
|
|
|
rtems_task init_task();
|
|
|
|
#define INIT_NAME rtems_build_name( 'A', 'B', 'C', ' ' ' )
|
|
|
|
rtems_initialization_tasks_table init_task = @{
|
|
@{ INIT_NAME, /* init task name "ABC" */
|
|
1024, /* init task stack size */
|
|
1, /* init task priority */
|
|
DEFAULT_ATTRIBUTES, /* init task attributes */
|
|
init_task, /* init task entry point */
|
|
TIMESLICE, /* init task initial mode */
|
|
0 /* init task argument */
|
|
@}
|
|
@};
|
|
|
|
rtems_configuration_table User_Configuration_Table = @{
|
|
NULL, /* dynamically assigned by the BSP */
|
|
65536, /* executive RAM size */
|
|
2, /* maximum tasks */
|
|
0, /* maximum timers */
|
|
0, /* maximum semaphores */
|
|
0, /* maximum message queues */
|
|
0, /* maximum messages */
|
|
0, /* maximum partitions */
|
|
0, /* maximum regions */
|
|
0, /* maximum ports */
|
|
0, /* maximum periods */
|
|
0, /* maximum extensions */
|
|
RTEMS_MILLISECONDS_TO_MICROSECONDS(10), /* number of ms in a tick */
|
|
1, /* num of ticks in a timeslice */
|
|
1, /* number of user init tasks */
|
|
init_task_tbl, /* user init task(s) table */
|
|
0, /* number of device drivers */
|
|
NULL, /* ptr to driver address table */
|
|
NULL, /* ptr to extension table */
|
|
NULL /* ptr to MP config table */
|
|
@};
|
|
|
|
task user_application(
|
|
rtems_task_argument ignored
|
|
);
|
|
|
|
#define USER_APP_NAME 1 /* any 32-bit name; unique helps */
|
|
|
|
rtems_task init_task(
|
|
rtems_task_argument ignored
|
|
)
|
|
@{
|
|
rtems_id tid;
|
|
|
|
/* example assumes SUCCESSFUL return value */
|
|
|
|
(void) rtems_task_create( USER_APP_NAME, 1, 1024,
|
|
RTEMS_NO_PREEMPT, RTEMS_FLOATING_POINT, &tid );
|
|
(void) rtems_task_start( tid, user_application, 0 );
|
|
(void) rtems_task_delete( SELF );
|
|
@}
|
|
|
|
|
|
|
|
rtems_task user_application()
|
|
|
|
@{
|
|
/* 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.
|
|
*/
|
|
@}
|
|
@}
|
|
@end example
|
|
|
|
|
|
|