app.c

keil 下的ucOS移植程序。移植平台AT91SAM7S64.

/*
*********************************************************************************************************
*                                               uC/OS-II
*                                         The Real-Time Kernel
*
*                             (c) Copyright 1998-2004, Micrium, Weston, FL
*                                          All Rights Reserved
*
*
*                                            ARM Sample code
*
* File : APP.C
* By   : Jean J. Labrosse
*********************************************************************************************************
*/

#include <includes.h>
#include "bsp.h"
#include "board.h"

/*
*********************************************************************************************************
*                                               信号量定义
*********************************************************************************************************
*/
OS_EVENT *UartSem;
/*
*********************************************************************************************************
*                                                CONSTANTS
*********************************************************************************************************
*/

#define  TASK_STK_SIZE    128

#define  TASK_Led_PRIO    5
#define  TASK_OSCPUUsage_PRIO    8
#define  TASK_Version_PRIO    6
#define  TASK_TIME_PRIO    7
/*
*********************************************************************************************************
*                                                VARIABLES
*********************************************************************************************************
*/

OS_STK   AppLedTaskStk[TASK_STK_SIZE];
OS_STK   AppOSCPUUsageTaskStk[TASK_STK_SIZE];
OS_STK   AppVersionTaskStk[TASK_STK_SIZE];
OS_STK   AppTIMETaskStk[TASK_STK_SIZE];
/*
*********************************************************************************************************
*                                            FUNCTION PROTOTYPES
*********************************************************************************************************
*/

static  void  AppLedTask(void *p_arg);
static  void  AppOSCPUUsageTask(void *p_arg);
static  void  AppVersionTask(void *p_arg);
static  void  AppTIMETask(void *p_arg);
/*
*********************************************************************************************************
*                                                main()
*
* Description : This is the standard entry point for C code.  It is assumed that your code will call
*               main() once you have performed all necessary 68HC12 and C initialization.
* Arguments   : none
*********************************************************************************************************
*/
int  main (void)
{
    

	BSP_IntCtrlInit();						/* Initialize the Interrupt Controller            */
	Init_Debug();
    OSInit();                               /* Initialize "uC/OS-II, The Real-Time Kernel"             */


    OSTaskCreate(AppLedTask,
                    (void *)0,
                    (OS_STK *)&AppLedTaskStk[TASK_STK_SIZE-1],
                    TASK_Led_PRIO
                    );
    UartSem = OSSemCreate(1);               /*建立信号量*/
	OSTimeSet(0);							/*系统时间归零*/
    OSStart();                              /* Start multitasking (i.e. give control to uC/OS-II)      */
}
/*$PAGE*/
/*
*********************************************************************************************************
*                                          LED TASK
*
* Description : This is an example of a startup task.  As mentioned in the book's text, you MUST
*               initialize the ticker only once multitasking has started.
* Arguments   : p_arg   is the argument passed to 'AppStartTask()' by 'OSTaskCreate()'.
* Notes       : 1) The first line of code is used to prevent a compiler warning because 'p_arg' is not
*                  used.  The compiler should not generate any code for this statement.
*               2) Interrupts are enabled once the task start because the I-bit of the CCR register was
*                  set to 0 by 'OSTaskCreate()'.
*********************************************************************************************************
*/

static  void  AppLedTask (void *p_arg)
{	
	char i;
    (void)p_arg;
	
    LED_Init();                             /* Initialize the I/Os for the LEDs                        */
    Tmr_TickInit();                         /* Initialize uC/OS-II's Tick Rate                         */


#if OS_TASK_STAT_EN > 0
    OSStatInit();                           /* Determine CPU capacity                                  */
#endif

	OSTaskCreate(AppOSCPUUsageTask,
                    (void *)0,
                    (OS_STK *)&AppOSCPUUsageTaskStk[TASK_STK_SIZE-1],
                    TASK_OSCPUUsage_PRIO
                    );
    OSTaskCreate(AppVersionTask,
                    (void *)0,
                    (OS_STK *)&AppVersionTaskStk[TASK_STK_SIZE-1],
                    TASK_Version_PRIO
                    );  
	OSTaskCreate(AppTIMETask,
                    (void *)0,
                    (OS_STK *)&AppTIMETaskStk[TASK_STK_SIZE-1],
                    TASK_TIME_PRIO
                    );    

    LED_Off(BSP_LED_ALL);                   /* Turn OFF all the LEDs                 */

    while (1) 			 /* Task body, always written as an infinite loop.          */
	{
	 
	                           
      for (i = 1; i <= 4; i++) {
            LED_On(i);
            OSTimeDlyHMSM(0, 0, 0, 50);
            LED_Off(i);
        }
        for (i = 1; i <= 4; i++) {
            LED_On(5 - i);
            OSTimeDlyHMSM(0, 0, 0, 50);
            LED_Off(5 - i);
        }   
    }
}

/************************OSCPUUsageTask*****************************/
static  void  AppOSCPUUsageTask (void *i)
{	INT8U  err;
 	char buf[100];
	
 while(1)
        {
 			OSTimeDly(OS_TICKS_PER_SEC<<1);
			OSSemPend(UartSem,0,&err);
			
            sprintf(buf,"OSCPUUsage = %ld%% \r\n",OSCPUUsage);
	    	AT91F_DBGU_Printk(buf);
			OSSemPost(UartSem);
		 }
}
/************************VersionTask*****************************/
static  void  AppVersionTask (void *i)
{	INT8U  err;
 	char buf[100];
	
 while(1)
        {
 			OSTimeDly(OS_TICKS_PER_SEC<<1);
			OSSemPend(UartSem,0,&err);
            sprintf(buf,"ucosii_ver = %ld% \r\n",OS_VERSION);
	    	AT91F_DBGU_Printk(buf);
			OSSemPost(UartSem);
		 }
}

/************************TIMETask*****************************/
static  void  AppTIMETask (void *i)
{	INT8U  err;
 	char buf[100];
	
 while(1)
        {
 			OSTimeDly(OS_TICKS_PER_SEC<<1);
			OSSemPend(UartSem,0,&err);
            sprintf(buf,"当前系统时间为：%ld% \r\n",OSTimeGet());
	    	AT91F_DBGU_Printk(buf);
			OSSemPost(UartSem);
		 }
}