test.c

《嵌入式实时操作系统μC／OS-Ⅱ》的源码

/*$PAGE*/
/*
*********************************************************************************************************
*                                             CREATE TASKS
*********************************************************************************************************
*/

static  void  TaskStartCreateTasks (void)
{
    OSTaskCreateExt(TaskClk,
                   (void *)0,
                   &TaskClkStk[TASK_STK_SIZE - 1],
                   TASK_CLK_PRIO,
                   TASK_CLK_ID,
                   &TaskClkStk[0],
                   TASK_STK_SIZE,
                   (void *)0,
                   OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);

    OSTaskCreateExt(Task1,
                   (void *)0,
                   &Task1Stk[TASK_STK_SIZE - 1],
                   TASK_1_PRIO,
                   TASK_1_ID,
                   &Task1Stk[0],
                   TASK_STK_SIZE,
                   (void *)0,
                   OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);

    OSTaskCreateExt(Task2,
                   (void *)0,
                   &Task2Stk[TASK_STK_SIZE - 1],
                   TASK_2_PRIO,
                   TASK_2_ID,
                   &Task2Stk[0],
                   TASK_STK_SIZE,
                   (void *)0,
                   OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);

    OSTaskCreateExt(Task3,
                   (void *)0,
                   &Task3Stk[TASK_STK_SIZE - 1],
                   TASK_3_PRIO,
                   TASK_3_ID,
                   &Task3Stk[0],
                   TASK_STK_SIZE,
                   (void *)0,
                   OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);

    OSTaskCreateExt(Task4,
                   (void *)0,
                   &Task4Stk[TASK_STK_SIZE-1],
                   TASK_4_PRIO,
                   TASK_4_ID,
                   &Task4Stk[0],
                   TASK_STK_SIZE,
                   (void *)0,
                   OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);

    OSTaskCreateExt(Task5,
                   (void *)0,
                   &Task5Stk[TASK_STK_SIZE-1],
                   TASK_5_PRIO,
                   TASK_5_ID,
                   &Task5Stk[0],
                   TASK_STK_SIZE,
                   (void *)0,
                   OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
}

/*$PAGE*/
/*
*********************************************************************************************************
*                                               TASK #1
*
* Description: This task executes every 100 mS and measures the time it task to perform stack checking
*              for each of the 5 application tasks.  Also, this task displays the statistics related to
*              each task's stack usage.
*********************************************************************************************************
*/

void  Task1 (void *pdata)
{
    INT8U       err;
    OS_STK_DATA data;                       /* Storage for task stack data                             */
    INT16U      time;                       /* Execution time (in uS)                                  */
    INT8U       i;
    char        s[80];


    pdata = pdata;
    for (;;) {
        for (i = 0; i < 7; i++) {
            PC_ElapsedStart();
            err  = OSTaskStkChk(TASK_START_PRIO + i, &data);
            time = PC_ElapsedStop();
            if (err == OS_NO_ERR) {
                sprintf(s, "%4ld        %4ld        %4ld        %6d",
                        data.OSFree + data.OSUsed,
                        data.OSFree,
                        data.OSUsed,
                        time);
                PC_DispStr(19, 12 + i, s, DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
            }
        }
        OSTimeDlyHMSM(0, 0, 0, 100);                       /* Delay for 100 mS                         */
    }
}
/*$PAGE*/
/*
*********************************************************************************************************
*                                               TASK #2
*
* Description: This task displays a clockwise rotating wheel on the screen.
*********************************************************************************************************
*/

void  Task2 (void *data)
{
    data = data;
    for (;;) {
        PC_DispChar(70, 15, '|',  DISP_FGND_YELLOW + DISP_BGND_BLUE);
        OSTimeDly(10);
        PC_DispChar(70, 15, '/',  DISP_FGND_YELLOW + DISP_BGND_BLUE);
        OSTimeDly(10);
        PC_DispChar(70, 15, '-',  DISP_FGND_YELLOW + DISP_BGND_BLUE);
        OSTimeDly(10);
        PC_DispChar(70, 15, '\\', DISP_FGND_YELLOW + DISP_BGND_BLUE);
        OSTimeDly(10);
    }
}
/*$PAGE*/
/*
*********************************************************************************************************
*                                               TASK #3
*
* Description: This task displays a counter-clockwise rotating wheel on the screen.
*
* Note(s)    : I allocated 500 bytes of storage on the stack to artificially 'eat' up stack space.
*********************************************************************************************************
*/

void  Task3 (void *data)
{
    char    dummy[500];
    INT16U  i;


    data = data;
    for (i = 0; i < 499; i++) {        /* Use up the stack with 'junk'                                 */
        dummy[i] = '?';
    }
    for (;;) {
        PC_DispChar(70, 16, '|',  DISP_FGND_YELLOW + DISP_BGND_BLUE);
        OSTimeDly(20);
        PC_DispChar(70, 16, '\\', DISP_FGND_YELLOW + DISP_BGND_BLUE);
        OSTimeDly(20);
        PC_DispChar(70, 16, '-',  DISP_FGND_YELLOW + DISP_BGND_BLUE);
        OSTimeDly(20);
        PC_DispChar(70, 16, '/',  DISP_FGND_YELLOW + DISP_BGND_BLUE);
        OSTimeDly(20);
    }
}
/*$PAGE*/
/*
*********************************************************************************************************
*                                               TASK #4
*
* Description: This task sends a message to Task #5.  The message consist of a character that needs to
*              be displayed by Task #5.  This task then waits for an acknowledgement from Task #5
*              indicating that the message has been displayed.
*********************************************************************************************************
*/

void  Task4 (void *data)
{
    char   txmsg;
    INT8U  err;


    data  = data;
    txmsg = 'A';
    for (;;) {
        OSMboxPost(TxMbox, (void *)&txmsg);      /* Send message to Task #5                            */
        OSMboxPend(AckMbox, 0, &err);            /* Wait for acknowledgement from Task #5              */
        txmsg++;                                 /* Next message to send                               */
        if (txmsg == 'Z') {
            txmsg = 'A';                         /* Start new series of messages                       */
        }
    }
}
/*$PAGE*/
/*
*********************************************************************************************************
*                                               TASK #5
*
* Description: This task displays messages sent by Task #4.  When the message is displayed, Task #5
*              acknowledges Task #4.
*********************************************************************************************************
*/

void  Task5 (void *data)
{
    char  *rxmsg;
    INT8U  err;


    data = data;
    for (;;) {
        rxmsg = (char *)OSMboxPend(TxMbox, 0, &err);                  /* Wait for message from Task #4 */
        PC_DispChar(70, 18, *rxmsg, DISP_FGND_YELLOW + DISP_BGND_BLUE);
        OSTimeDlyHMSM(0, 0, 1, 0);                                    /* Wait 1 second                 */
        OSMboxPost(AckMbox, (void *)1);                               /* Acknowledge reception of msg  */
    }
}
/*$PAGE*/
/*
*********************************************************************************************************
*                                               CLOCK TASK
*********************************************************************************************************
*/

void  TaskClk (void *data)
{
    char s[40];


    data = data;
    for (;;) {
        PC_GetDateTime(s);
        PC_DispStr(60, 23, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);
        OSTimeDly(OS_TICKS_PER_SEC);
    }
}