app_main.c

一个实时操作系统的源代码。包括任务的调度机制、文件系统等

/*
===============================================================================
| COPYRIGHT (C) 2003-2007 Haishen Ruan, All rights reserved.
| SUMMARY: 
|   RS-RTOS demo implementation.
|
|
| LICENSE INFORMATION
|   RS-RTOS is free software; you can redistribute it and/or modify it under
|   terms of the GNU General Public License as published by the
|   Free Software Foundation; either version 2, or (at your option) any
|   later version.
|
|   RS-RTOS is distributed in the hope that it will be useful,
|   but WITHOUT ANY WARRANTY; without even the implied warranty of
|   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|   General Public License for more details.
|
|   You should have received a copy of the GNU General Public License
|   along with RS-RTOS; see file COPYING. If not, write to the Free Software
|   Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
|
|   As a special exception, including RS-RTOS header files in a file,
|   instantiating RS-RTOS generics or templates, or linking other files
|   with RS-RTOS objects to produce an executable application, does not
|   by itself cause the resulting executable application to be covered
|   by the GNU General Public License. This exception does not
|   however invalidate any other reasons why the executable file might be
|   covered by the GNU Public License.
|
|
| DESCRIPTION:
|   See http://www.RS-RTOS.org for documentation, latest information, license 
|   and contact details.
|   email:[e-mail]
=============================================================================*/ 
/*===========================================================================*/
#if 0
#include "inc/kapi.h"

/*
* 该例子初始化创建了两个任务,分别以不同频率控制LED闪烁.任务通过使用信号量获取对
* LED控制权,每个任务对LED进行4秒的控制输出,成功运行该程序将看到LED指示灯以不同
* 频率交替闪烁一段时间.
*/

/* 任务栈大小 */
#define APP_STACK_SIZE      60

/* 任务优先级 */
#define APP_PRIO_TASK1      0
#define APP_PRIO_TASK2      1

#define LED_OFF()           LED_BIT = 1
#define LED_ON()            LED_BIT = 0


/* P3_5定义LED的脚 */
sbit LED_BIT = 0xB0 ^ 5;     

/* 任务栈 */
static byte idata app_stacks[2][APP_STACK_SIZE];

/* LED控制信号量 */
sem_t sem_led;

void app_task_1(arg_t arg);
void app_task_2(arg_t arg);

        
/* 初始化硬件 */
void hardware_initialize(void)
{
    /* 初始化时钟 */
    TMOD = 0x01;
    ET0  = 1;
    TR0  = 1;
}


/* 应用初始化,初始化创建两个任务。 */
void application_initialize(void)
{
    /* 创建Task1任务 */
    task_create(
        APP_PRIO_TASK1,
        build_name('T', 'A', '1', '\0'),
        app_task_1, 0,
        app_stacks[0], APP_STACK_SIZE,
        0);

    /* 创建Task2任务 */
    task_create(
        APP_PRIO_TASK2,
        build_name('T', 'A', '2', '\0'),
        app_task_2, 0,
        app_stacks[1], APP_STACK_SIZE,
        0);

    /* 初始化信号量 */
    semaphore_create(
        &sem_led,
        build_name('S', 'E', 'M', '\0'),
        1);
}


/* Task1任务入口 */
void app_task_1(arg_t arg)
{
    int i;

    arg = arg;

    for (;;)
    {
        semaphore_wait(&sem_led, RS_WAIT_FOREVER);

        for (i = 0; i < 4; i++)
        {
            /* Turn led on. */
            LED_ON();
            /* Delay 1/2 second. */
            task_sleep(RS_TICK_FREQ * 1 / 2);
            
            /* Turn led off. */
            LED_OFF();
            /* Delay 1/2 second. */
            task_sleep(RS_TICK_FREQ * 1 / 2);
        }
        
        semaphore_post(&sem_led);
    }
}

/* Task2任务入口 */
void app_task_2(arg_t arg)
{
    int i;
    
    arg = arg;

    for (;;)
    {
        semaphore_wait(&sem_led, RS_WAIT_FOREVER);

        for (i = 0; i < 20; i++)
        {
            /* Turn led on. */
            LED_ON();
            /* Delay 1/10 second. */
            task_sleep(RS_TICK_FREQ * 1 / 10);
            
            /* Turn led off. */
            LED_OFF();
            /* Delay 1/10 second. */
            task_sleep(RS_TICK_FREQ * 1 / 10);
        }
        
        semaphore_post(&sem_led);
    }
}

#endif
/*===========================================================================*/