ex123l.c.rtf

us/osII最新解读

                    TASK_2_ID, &Task2Stk[0], TASK_STK_SIZE, &TaskUserData[TASK_2_ID], 0);

    strcpy(TaskUserData[TASK_3_ID].TaskName, "MsgQ Rx Task #2");
    OSTaskCreateExt(Task3, (void *)0, &Task3Stk[TASK_STK_SIZE-1], TASK_3_PRIO,
                    TASK_3_ID, &Task3Stk[0], TASK_STK_SIZE, &TaskUserData[TASK_3_ID], 0);

    strcpy(TaskUserData[TASK_4_ID].TaskName, "MboxPostPendTask");
    OSTaskCreateExt(Task4, (void *)0, &Task4Stk[TASK_STK_SIZE-1], TASK_4_PRIO,
                    TASK_4_ID, &Task4Stk[0], TASK_STK_SIZE, &TaskUserData[TASK_4_ID], 0);

    strcpy(TaskUserData[TASK_5_ID].TaskName, "TimeDlyTask");
    OSTaskCreateExt(Task5, (void *)0, &Task5Stk[TASK_STK_SIZE-1], TASK_5_PRIO,
                    TASK_5_ID, &Task5Stk[0], TASK_STK_SIZE, &TaskUserData[TASK_5_ID], 0);

    PC_DispStr( 0, 22, "#Tasks          : xxxxx  CPU Usage: xxx %", DISP_FGND_WHITE);
    PC_DispStr( 0, 23, "#Task switch/sec: xxxxx", DISP_FGND_WHITE);
    for (;;) {
        sprintf(s, "%5d", OSTaskCtr);                      /* Display #tasks running                   */
        PC_DispStr(18, 22, s, DISP_FGND_BLUE + DISP_BGND_CYAN);
        sprintf(s, "%3d", OSCPUUsage);                     /* Display CPU usage in %                   */
        PC_DispStr(36, 22, s, DISP_FGND_BLUE + DISP_BGND_CYAN);
        sprintf(s, "%5d", OSCtxSwCtr);                     /* Display #context switches per second     */
        PC_DispStr(18, 23, s, DISP_FGND_BLUE + DISP_BGND_CYAN);
        sprintf(s, "V%3.2f", (float)OSVersion() * 0.01);
        PC_DispStr(75, 24, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);
        
        OSCtxSwCtr = 0;                                    /* Clear the context switch counter         */

        if (PC_GetKey(&key)) {                             /* See if key has been pressed              */
            if (key == 0x1B) {                             /* Yes, see if it's the ESCAPE key          */
                PC_DOSReturn();                            /* Yes, return to DOS                       */
            }
        }

        OSTimeDly(OS_TICKS_PER_SEC);                       /* Wait one second                          */
    }
}
*********************************************************************************************************
*                                               TASK #1
* Description: This task executes 5 times per second but doesn't do anything.
*********************************************************************************************************
void  Task1 (void *data)
{
    char one   = '1';
    char two   = '2';
    char three = '3'; 
    data = data;
    for (;;) {
        OSQPost(MsgQueue, (void *)&one);
        OSTimeDlyHMSM(0, 0, 1,   0);        /* Delay for 1 second                                      */
        OSQPost(MsgQueue, (void *)&two);
        OSTimeDlyHMSM(0, 0, 0, 500);        /* Delay for 500 mS                                        */
        OSQPost(MsgQueue, (void *)&three);
        OSTimeDlyHMSM(0, 0, 1,   0);        /* Delay for 1 second                                      */
    }
}
*********************************************************************************************************
*                                               TASK #2
* Description: This task waits for messages sent by task #1.
*********************************************************************************************************
void  Task2 (void *data)
{
    INT8U *msg;
    INT8U  err;    
    data = data;
    for (;;) {
        msg = (INT8U *)OSQPend(MsgQueue, 0, &err);    /* Wait forever for message                      */
        PC_DispChar(70, 14, *msg, DISP_FGND_YELLOW + DISP_BGND_BLUE);
        OSTimeDlyHMSM(0, 0, 0, 500);                  /* Delay for 500 mS                              */
    }
}
*********************************************************************************************************
*                                               TASK #3
* Description: This task waits for up to 500 mS for a message sent by task #1.
*********************************************************************************************************
void  Task3 (void *data)
{
    INT8U *msg;
    INT8U  err;
    data = data;
    for (;;) {
        msg = (INT8U *)OSQPend(MsgQueue, OS_TICKS_PER_SEC / 4, &err);  /* Wait up to 250 mS for a msg  */
        if (err == OS_TIMEOUT) {
            PC_DispChar(70, 15, 'T',  DISP_FGND_YELLOW + DISP_BGND_RED);
        } else {
            PC_DispChar(70, 15, *msg, DISP_FGND_YELLOW + DISP_BGND_BLUE);
        }
    }
}
*********************************************************************************************************
*                                               TASK #4
* Description: This task posts a message to a mailbox and then immediately reads the message.
*********************************************************************************************************
void  Task4 (void *data)
{
    OS_EVENT *mbox;
    INT8U     err;
    data = data;
    mbox = OSMboxCreate((void *)0);
    for (;;) {
        OSMboxPost(mbox, (void *)1);             /* Send message to mailbox                            */
        OSMboxPend(mbox, 0, &err);               /* Get message from mailbox                           */
        OSTimeDlyHMSM(0, 0, 0, 10);              /* Delay 10 mS                                        */
    }
}
*********************************************************************************************************
*                                               TASK #5
** Description: This task simply delays itself.  We basically want to determine how long OSTimeDly() takes
*              to execute.
*********************************************************************************************************
void  Task5 (void *data)
{
    data = data;
    for (;;) {
        OSTimeDly(1);
    }
}

void DispTaskStat (INT8U id)
{
    char s[80];
    sprintf(s, "%-18s %05u      %5u          %10ld", 
            TaskUserData[id].TaskName,
            TaskUserData[id].TaskCtr,
            TaskUserData[id].TaskExecTime,
            TaskUserData[id].TaskTotExecTime);
    PC_DispStr(0, id + 11, s, DISP_FGND_LIGHT_GRAY);
}

void  TaskClk (void *data)
{
    char  s[40];
    data = data;
    for (;;) {
        PC_GetDateTime(s);
        PC_DispStr(0, 24, s, DISP_FGND_BLUE + DISP_BGND_CYAN);
        OSTimeDlyHMSM(0, 0, 0, 100);             /* Execute every 100 mS                               */
    }
}
*********************************************************************************************************
*                                           TASK CREATION HOOK
* Description: This function is called when a task is created.
*Arguments  : ptcb    is a pointer to the task being created.
*Note(s)    : 1) Interrupts are disabled during this call.
*********************************************************************************************************
void OSTaskCreateHook (OS_TCB *ptcb)
{
    ptcb = ptcb;                       /* Prevent compiler warning                                     */
}
*********************************************************************************************************
*                                           TASK DELETION HOOK
*Description: This function is called when a task is deleted.
*Arguments  : ptcb    is a pointer to the task being created.
*Note(s)    : 1) Interrupts are disabled during this call.
*********************************************************************************************************
void OSTaskDelHook (OS_TCB *ptcb)
{
    ptcb = ptcb;                       /* Prevent compiler warning                                     */
}
*********************************************************************************************************
*                                           TASK SWITCH HOOK
* Description: This function is called when a task switch is performed.  This allows you to perform other
*              operations during a context switch.
*Arguments  : none
*Note(s)    : 1) Interrupts are disabled during this call.
*              2) It is assumed that the global pointer 'OSTCBHighRdy' points to the TCB of the task that
*                 will be 'switched in' (i.e. the highest priority task) and, 'OSTCBCur' points to the task
*                 being switched out (i.e. the preempted task).
*********************************************************************************************************
void OSTaskSwHook (void)
{
    INT16U          time;
    TASK_USER_DATA *puser;
    time  = PC_ElapsedStop();                    /* This task is done                                  */
    PC_ElapsedStart();                           /* Start for next task                                */
    puser = OSTCBCur->OSTCBExtPtr;               /* Point to used data                                 */
    if (puser != (void *)0) {     
        puser->TaskCtr++;                        /* Increment task counter                             */
        puser->TaskExecTime     = time;          /* Update the task's execution time                   */
        puser->TaskTotExecTime += time;          /* Update the task's total execution time             */
    }
}
*********************************************************************************************************
*                                          STATISTIC TASK HOOK
* Description: This function is called every second by uC/OS-II's statistics task.  This allows your 
*              application to add functionality to the statistics task.
**********************************************************************************************************
void OSTaskStatHook (void)
{
    char   s[80];
    INT8U  i;
    INT32U total;
    INT8U  pct;
    total = 0L;                                          /* Totalize TOT. EXEC. TIME for each task */
    for (i = 0; i < 7; i++) {
        total += TaskUserData[i].TaskTotExecTime;
        DispTaskStat(i);                                 /* Display task data                      */
    }
    if (total > 0) {
        for (i = 0; i < 7; i++) {                        /* Derive percentage of each task         */
            pct = 100 * TaskUserData[i].TaskTotExecTime / total;
            sprintf(s, "%3d %%", pct);
            PC_DispStr(62, i + 11, s, DISP_FGND_YELLOW);
        }
    }
    if (total > 1000000000L) {                           /* Reset total time counters at 1 billion */
        for (i = 0; i < 7; i++) {
            TaskUserData[i].TaskTotExecTime = 0L;
        }
    }
}

void OSTimeTickHook (void)
{
}