artx_ex1.c

嵌入式例程系列1

/*----------------------------------------------------------------------------
 *      A R T X   K e r n e l   E x a m p l e
 *----------------------------------------------------------------------------
 *      Name:    ARTX_EX1.C
 *      Purpose: Your First Advanced RTX example program
 *      Rev.:    V2.02 / 6-feb-2006
 *----------------------------------------------------------------------------
 *      This code is part of the ARTX-ARM kernel package of Keil Software.
 *      Copyright (c) 2004-2006 Keil Software. All rights reserved. 
 *---------------------------------------------------------------------------*/

#include <ARTX.h>                      /* ARTX kernel functions & defines    */

/* id1, id2 will contain task identifications at run-time */
OS_TID id1, id2;

/* Forward reference */
void task1 (void) __task;
void task2 (void) __task;

/*----------------------------------------------------------------------------
 *   Task 1:  ARTX Kernel starts this task with os_sys_init (task1)
 *---------------------------------------------------------------------------*/
void task1 (void) __task {
  /* Obtain own system task identification number */
  id1 = os_tsk_self ();
  /* Assign system identification number of task2 to id2 */
  id2 = os_tsk_create (task2, 1);
  for (;;) {    /* do-this */
    /* Indicate to task2 completion of do-this */
    os_evt_set (0x0004, id2);
    /* Wait for completion of do-that (0xffff means no time-out)*/
    os_evt_wait_or (0x0004, 0xffff);
    /* Wait now for 50 ms */
    os_dly_wait (5);
  }
}

/*----------------------------------------------------------------------------
 *   Task 2:  ARTX Kernel starts this task with os_tsk_create (task2, 1)
 *---------------------------------------------------------------------------*/
void task2 (void) __task {
  for (;;) {
    /* Wait for completion of do-this (0xffff means no time-out) */
    os_evt_wait_or (0x0004, 0xffff); /* do-that */
    /* Pause for 20 ms until signaling event to task1 */
    os_dly_wait (2);
    /* Indicate to task1 completion of do-that */
    os_evt_set (0x0004, id1);
  }
}

/*----------------------------------------------------------------------------
 *        Main: Initialize and start ARTX Kernel
 *---------------------------------------------------------------------------*/
void main (void) {
#ifdef MCB2100
  U32 volatile start;
 
   /* Wait for debugger connection (about 0.3 sec) */
  for (start = 0; start < 1000000; start++) { ; }
#endif
  os_sys_init (task1);
}

/*----------------------------------------------------------------------------
 * end of file
 *---------------------------------------------------------------------------*/