app.c

基于 ST 公司的 ARM-7 使用之 uC/OS-II 作业系统,此例程是移植于 STR-750 上的应用,有支援 OS_View 观察器功能,于 IAR EWARM V4.41A 工程编译,而 u

/*
*********************************************************************************************************
*
*                                             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
*
* Filename      : app.c
* Version       : V1.00
* Programmer(s) : Brian Nagel
*********************************************************************************************************
*/

#include <includes.h>


/*
*********************************************************************************************************
*                                                VARIABLES
*********************************************************************************************************
*/

OS_STK          AppTaskStartStk[APP_TASK_START_STK_SIZE];

#if uC_LCD_MODULE == DEF_ENABLED
OS_STK          AppTaskUserIFStk[APP_TASK_USER_IF_STK_SIZE];
#endif

static  CPU_INT08U  EXTINT_Char;
static  OS_EVENT   *EXTINT_Mbox;


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

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

#if uC_LCD_MODULE == DEF_ENABLED
static  void    AppTaskUserIF(void *p_arg);
#endif

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

static  void    EXTINT_ISRHandler(void);
static  void    AppFormatDec (CPU_INT08U *s, CPU_INT32U value, CPU_INT08U digits);


/*
*********************************************************************************************************
*                                                main()
*
* Description : This is the standard entry point for C code.
*
* Arguments   : 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)       */
}


/*
*********************************************************************************************************
*                                          STARTUP 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()'.
*********************************************************************************************************
*/

static  void  AppTaskStart (void *p_arg)
{
    CPU_INT08U  i;


    (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_TerminalRxSetCallback(AppTerminalRx);
    OSView_RxIntEn();                                           /* Enable Rx Interrupts                                     */
#endif

#if uC_LCD_MODULE == DEF_ENABLED
    DispInit(2, 16);
#endif

    AppTaskCreate();                                            /* Create application tasks                                 */

    EXTINT_Mbox = OSMboxCreate((void *)0);                      /* Create mailbox for PB control of user IF                 */
    EXTINT_Init(EXTINT_ISRHandler);                             /* Initialize EXTIT for PB interrupts                       */

    while (DEF_TRUE) {                                          /* Task body, always written as an infinite loop.           */
        for (i = 1; i <= 16; i++) {
            LED_On(i);
            OSTimeDlyHMSM(0, 0, 0, 25);
        }
        for (i = 0; i < 4; i++) {
            LED_On(LED_LINK);
            LED_On(LED_STAT);
            OSTimeDlyHMSM(0, 0, 0, 50);
            LED_Off(LED_LINK);
            LED_Off(LED_STAT);
            OSTimeDlyHMSM(0, 0, 0, 50);
        }
        for (i = 16; i >= 1; i--) {
            LED_Off(i);
            OSTimeDlyHMSM(0, 0, 0, 25);
        }
        for (i = 0; i < 4; i++) {
            LED_On(LED_LINK);
            LED_On(LED_STAT);
            OSTimeDlyHMSM(0, 0, 0, 50);
            LED_Off(LED_LINK);
            LED_Off(LED_STAT);
            OSTimeDlyHMSM(0, 0, 0, 50);
        }
    }
}

/*
*********************************************************************************************************
*                                         USER INTERFACE TASK
*********************************************************************************************************
*/

#if uC_LCD_MODULE == DEF_TRUE
static  void  AppTaskUserIF (void *p_arg)
{
    CPU_INT08U      s[20];
    CPU_INT08U      user_if_state;
    CPU_INT08U     *msg;
    CPU_INT32U      value;
    CPU_BOOLEAN     change;

    (void)p_arg;

    DispInit(2, 16);                                            /* Initialize the LCD module                                */

    DispStr(0, 0, "Micrium uC/OS-II");                          /* Display 'sign on' message                                */
    DispStr(1, 0, "   ST  STR75x   ");

    OSTimeDlyHMSM(0, 0, 1, 0);

    user_if_state = 0;

    while (DEF_TRUE) {                                          /* Task body, always written as an infinite loop.           */
        msg      = (CPU_INT08U *)OSMboxAccept(EXTINT_Mbox);
        change   = DEF_FALSE;