原创 STM32上RTOS初探之一（Keil ARTX）

Keil ARTX(Advanced Real-Time eXecutive)是Keil为ARM 系列所提供的一个小型实时操作系统,整合于其UV3开发环境之中.

在下载并安装了RealView MDK个人学习版后，ARTX同时安装到了C:\Keil\ARM\RL\RTX目录下，在C:\Keil\ARM\Boards\Keil\MCBSTM32\STLIB_RTX_Blinky目录下有STM32的例子程序。经过简单修改，运行在万利开发板上。

#include <RTL.h>
#include <stm32f10x_lib.h>        

OS_TID t_phaseA;               /* assigned task id of task: phase_a */
OS_TID t_phaseB;               /* assigned task id of task: phase_b */
OS_TID t_phaseC;               /* assigned task id of task: phase_c */
OS_TID t_phaseD;                /* assigned task id of task: phase_d */

#define LED_A   GPIO_Pin_4
#define LED_B   GPIO_Pin_5
#define LED_C   GPIO_Pin_6
#define LED_D   GPIO_Pin_7

#define LED_On(led)     GPIO_SetBits(GPIOC, led)
#define LED_Off(led)    GPIO_ResetBits(GPIOC, led)

/* Import functions from Setup.c                                             */
extern void SetupClock  (void);
extern void SetupLED    (void);

/*----------------------------------------------------------------------------
 *        Task 1 'phaseA': Phase A output
 *---------------------------------------------------------------------------*/
void phaseA (void) __task {
  for (;;) {
    LED_On (LED_A);
   os_dly_wait (100);
   LED_Off(LED_A);
   os_dly_wait (100);
  }
}

/*----------------------------------------------------------------------------
 *        Task 2 'phaseB': Phase B output
 *---------------------------------------------------------------------------*/
void phaseB (void) __task {
  for (;;) {
     LED_On (LED_B);
    os_dly_wait (100);
    LED_Off(LED_B);
    os_dly_wait (100);
  }
}

/*----------------------------------------------------------------------------
 *        Task 3 'phaseC': Phase C output
 *---------------------------------------------------------------------------*/
void phaseC (void) __task {
  for (;;) {
    LED_On (LED_C);
    os_dly_wait (100);
    LED_Off(LED_C);
    os_dly_wait (100);
  }
}

/*----------------------------------------------------------------------------
 *        Task 4 'phaseD': Phase D output
 *---------------------------------------------------------------------------*/
void phaseD (void) __task {
  for (;;) {
    LED_On (LED_D);
    os_dly_wait (100);
    LED_Off(LED_D);
   os_dly_wait (100);
  }
}

/*----------------------------------------------------------------------------
 *        Task 8 'init': Initialize
 *---------------------------------------------------------------------------*/
void init (void) __task {

  t_phaseA = os_tsk_create (phaseA, 0);  /* start task phaseA     */
  os_dly_wait (50);
  t_phaseB = os_tsk_create (phaseB, 0);  /* start task phaseB      */
  os_dly_wait (50);
  t_phaseC = os_tsk_create (phaseC, 0);  /* start task phaseC       */
  os_dly_wait (50);
  t_phaseD = os_tsk_create (phaseD, 0);  /* start task phaseD       */
  os_tsk_delete_self ();
}

/*----------------------------------------------------------------------------
 *        Main: Initialize and start RTX Kernel
 *---------------------------------------------------------------------------*/
int main (void) {

  SetupClock();
  SetupLED  ();
  os_sys_init (init);                    /* Initialize RTX and start init    */
}

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

经过初试化后，os_sys_init (init)启动了初试化任务。在初试化任务中，又先后启动了4个任务，启动后，删除初试化任务。这4个任务各自控制一个LED的开关。