Compiler/TDA4VM: Do TimerP_create() API use a Timer resource?

Hi,

TimerP_create() is an OSAL (Operating System Abstraction Layer) API. It acts as an intermediary between the Application and BIOS API.

It was added so that customers can port their own Operating Systems without changing application/examples.

Yes, TimerP_create() uses a DM Timer resource.

Regards

Vineet

I want to double check the TimerP_create() and Timer_create(). Are they same as each other?

I have do some test of TimerP_create, but the period is not accurate.

• First step: I create one timer use TimerP_create:

     Error_init(&eb);

    TimerP_Params_init(&timerParams_hwi_0);

    timerParams_hwi_0.startMode = TimerP_StartMode_USER;
    // timerParams_hwi_0.periodType = TimerP_PeriodType_MICROSECS;
    timerParams_hwi_0.periodType = TimerP_PeriodType_COUNTS;
    timerParams_hwi_0.period = TEST_TIMER_INTERVAL;/*usecs*/

    timerHandle_hwi_0 = TimerP_create(TimerP_ANY, (TimerP_Fxn)Timer_HWI_func,
                                    &timerParams_hwi_0);
    if (NULL == timerHandle_hwi_0)
    {
        /*Failed to create timer*/
        appLogPrintf("TimerTest: Failed to create timer\n");
    }

• Second step: I post some semaphore for each task.

#if defined(OSAL_SEMAPHORE_TEST)
static void Timer_HWI_func(void)
{
    hwi_timerTickCnt_1ms++;
    SemaphoreP_post(semaphoreHandle_1ms);
    if( hwi_timerTickCnt_1ms % 5 == 0 )
    {
        SemaphoreP_post(semaphoreHandle_5ms);
    }

    if( hwi_timerTickCnt_1ms % 10 == 0 )
    {
        SemaphoreP_post(semaphoreHandle_10ms);
    }

    if( hwi_timerTickCnt_1ms % 20 == 0 )
    {
        SemaphoreP_post(semaphoreHandle_20ms);
    }

    if( hwi_timerTickCnt_1ms % 50 == 0 )
    {
        SemaphoreP_post(semaphoreHandle_50ms);
    }

    if( hwi_timerTickCnt_1ms % 100 == 0 )
    {
        SemaphoreP_post(semaphoreHandle_100ms);
    }

    if( hwi_timerTickCnt_1ms % 200 == 0 )
    {
        SemaphoreP_post(semaphoreHandle_200ms);
    }

    if( hwi_timerTickCnt_1ms % 500 == 0 )
    {
        SemaphoreP_post(semaphoreHandle_500ms);
    }

    if( hwi_timerTickCnt_1ms % 1000 == 0 )
    {
        SemaphoreP_post(semaphoreHandle_1000ms);
    }
}
#endif

• Third step: print the counter in 1S task.

static void appTask_1ms_proc(UArg arg0, UArg arg1)
{
    // static uint32_t app_Task_1ms_cnt_internal = 0;
    while(1)
    {
        /*Pend on semaphore posted by DM Timer*/
        SemaphoreP_pend(semaphoreHandle_1ms, SemaphoreP_WAIT_FOREVER);

        Task_timerTickCnt_1ms++;

}

/**************************** appTask_5ms_proc *********************************/
static void appTask_5ms_proc(UArg arg0, UArg arg1)
{

    while(1)
    {
        /*Pend on semaphore posted by DM Timer*/
        SemaphoreP_pend(semaphoreHandle_5ms, SemaphoreP_WAIT_FOREVER);
        Task_timerTickCnt_5ms++;
    }
}

/**************************** appTask_1000ms_proc *********************************/
static void appTask_1000ms_proc(UArg arg0, UArg arg1)
{
    while(1)
    {
        /*Pend on semaphore posted by DM Timer*/
        SemaphoreP_pend(semaphoreHandle_1000ms, SemaphoreP_WAIT_FOREVER);
        Task_timerTickCnt_1000ms++;
        appLogPrintf("timertest : Task_timerTickCnt_1ms = %d\n", Task_timerTickCnt_1ms);
        appLogPrintf("timertest : Task_timerTickCnt_5ms = %d\n", Task_timerTickCnt_5ms);
    }

}

The result of the print log in 1S had print more than 5 times.

I think the clock of the timer is not correct.

I want to check the below questions:

1. Is my timer use the TI-RTOS System timer?if it means I can use TimerP_create to create many timers and don't need to care about the timer resource?
2. How can I make my timer clock be correct?
3. Is there one fixed unit of TimerP_PeriodType_COUNTS or what is the unit of this type?
4. For TimerP_PeriodType_MICROSECS, the same question with 3rd.

Hi,

TimerP_PeriodType_COUNTS is a unitless value. It just returns the number of clock ticks. Whatever be the frequency.

TimerP_PeriodType_MICROSECS gives the number of microseconds.

Both of them are types for the structure field Timer_PeriodType.

See

Regards

Vineet

Thanks for your reply, I can use my periodic task now.