app.c

AT91SAM7SE,ucos移植范例

/*
*********************************************************************************************************
*
*                                             EXAMPLE CODE
*
*                          (c) Copyright 2003-2006; Micrium, Inc.; Weston, FL
*
*               All rights reserved.  Protected by international copyright laws.
*
*               Knowledge of the source code may NOT be used to develop a similar product.
*
*               Please help us continue to provide the Embedded community with the finest
*               software available.  Your honesty is greatly appreciated.
*********************************************************************************************************
*/

/*
*********************************************************************************************************
*
*                                             EXAMPLE CODE
*
*                                           Atmel AT91SAM7SE
*                                                on the
*                                     AT91SAM7SE-EK Evaluation Board
*
* Filename      : app.c
* Version       : V1.00
* Programmer(s) : BAN
*********************************************************************************************************
*/

/*
*********************************************************************************************************
*                                             INCLUDE FILES
*********************************************************************************************************
*/

#include <includes.h>


/*
*********************************************************************************************************
*                                            LOCAL DEFINES
*********************************************************************************************************
*/


/*
*********************************************************************************************************
*                                       LOCAL GLOBAL VARIABLES
*********************************************************************************************************
*/

                                                                /* ----------------- APPLICATION GLOBALS ------------------ */
static  OS_STK  AppTaskStartStk[APP_TASK_START_STK_SIZE];
static  OS_STK  AppTaskKbdStk[APP_TASK_KBD_STK_SIZE];


/*
*********************************************************************************************************
*                                      LOCAL FUNCTION PROTOTYPES
*********************************************************************************************************
*/

static  void  AppTaskStart (void       *p_arg);
static  void  AppTaskCreate(void);

static  void  AppTaskKbd   (void       *p_arg);

#if (OS_VIEW_MODULE > 0)
static  void  AppTerminalRx(CPU_INT08U  rx_data);
#endif


/*
*********************************************************************************************************
*                                                main()
*
* Description : The standard entry point for C code.  It is assumed that your code will call
*               main() once you have performed all necessary initialization.
*
* Argument(s) : none.
*
* Return(s)   : none.
*********************************************************************************************************
*/

void  main (void)
{
    CPU_INT08U  err;


    BSP_IntDisAll();                                            /* Disable all interrupts until we are ready to accept them */

    OSInit();                                                   /* Initialize "uC/OS-II, The Real-Time Kernel"              */

    OSTaskCreateExt(AppTaskStart,                               /* Create the start task                                    */
                    (void *)0,
                    (OS_STK *)&AppTaskStartStk[APP_TASK_START_STK_SIZE - 1],
                    APP_TASK_START_PRIO,
                    APP_TASK_START_PRIO,
                    (OS_STK *)&AppTaskStartStk[0],
                    APP_TASK_START_STK_SIZE,
                    (void *)0,
                    OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);

#if (OS_TASK_NAME_SIZE > 13)
    OSTaskNameSet(APP_TASK_START_PRIO, "Start Task", &err);
#endif

    OSStart();                                                  /* Start multitasking (i.e. give control to uC/OS-II)       */
}


/*
*********************************************************************************************************
*                                          AppTaskStart()
*
* Description : The startup task.  The uC/OS-II ticker should only be initialize once multitasking starts.
*
* Argument(s) : p_arg       Argument passed to 'AppTaskStart()' by 'OSTaskCreate()'.
*
* Return(s)   : none.
*
* Note(s)     : (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 starts because the I-bit of the CCR register was
*                   set to 0 by 'OSTaskCreate()'.
*********************************************************************************************************
*/

static  void  AppTaskStart (void *p_arg)
{
    (void)p_arg;

    BSP_Init();                                                 /* Initialize BSP functions                                 */

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

#if (OS_VIEW_MODULE > 0)
    OSView_Init(38400);                                         /* OSView Init, baud rate = 38400                           */
    OSView_TerminalRxSetCallback(AppTerminalRx);
    OSView_RxIntEn();                                           /* Enable Rx Interrupts                                     */
#endif

    AppTaskCreate();

    while (DEF_TRUE) {                                          /* Task body, always written as an infinite loop.           */
        OSTimeDlyHMSM(0, 0, 10, 0);
    }
}


/*
*********************************************************************************************************
*                                      AppTaskCreate()
*
* Description :  Create the application tasks.
*
* Argument(s) :  none.
*
* Return(s)   :  none.
*********************************************************************************************************
*/

static  void  AppTaskCreate (void)
{
    CPU_INT08U  err;


    OSTaskCreateExt(AppTaskKbd,
                    (void *)0,
                    (OS_STK *)&AppTaskKbdStk[APP_TASK_KBD_STK_SIZE - 1],
                    APP_TASK_KBD_PRIO,
                    APP_TASK_KBD_PRIO,
                    (OS_STK *)&AppTaskKbdStk[0],
                    APP_TASK_KBD_STK_SIZE,
                    (void *)0,
                    OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);

#if (OS_TASK_NAME_SIZE > 8)
    OSTaskNameSet(APP_TASK_KBD_PRIO, "Keyboard", &err);
#endif
}


/*
*********************************************************************************************************
*                                    AppTaskKbd()
*
* Description : Monitor the state of the push buttons and joystick.
*
* Argument(s) : p_arg       Argument passed to 'AppTaskKbd()' by 'OSTaskCreate()'.
*
* Return(s)   : none.
*
* Note(s)     : (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.
*********************************************************************************************************
*/

static  void  AppTaskKbd (void *p_arg)
{
    CPU_INT08U  status;
    CPU_INT08U  status_last_pb0;
    CPU_INT08U  status_last_pb1;
    CPU_INT32U  status_joystick;
    CPU_INT32U  status_last_joystick;


    (void)p_arg;


    status_last_pb0      = 0;
    status_last_pb1      = 0;