CCS/TMS570LS1224: Using rtiSetPeriod() to Dynamically Change rti Timer

Tool/software: Code Composer Studio

Hi Hercules team,

I am currently looking to use the rti module as a "sleep()" function.

I noticed that the rtiSetPeriod() function updates only after an additional "tick" of the previous period length has passed (expected behavior).

This unfortunately means that when setting the period to a large value (like 1000ms) then trying to change to a small value (100us), we must wait up to an additional 1000ms before the timer can change.

Is there a way to force the "tick" to happen faster so that we can immediately switch the period to something smaller?

Here's the code I am currently trying to use as a "sleep" or "delay" function, to help clarify what I am trying to do:

//**************
//delay function, input = number of microseconds
//**************
void delayus(uint16 us) {
    if (us == 0)
       return;
    else
    {
        rtiSetPeriod(rtiCOMPARE0, 10*us);
        rtiEnableNotification(rtiNOTIFICATION_COMPARE0);
        rtiStartCounter(rtiCOUNTER_BLOCK0);
        while(RTI_TIMEOUT==0); //this is set to 1 in notificaiton.c rtiNotification
        RTI_TIMEOUT = 0;
        rtiDisableNotification(rtiNOTIFICATION_COMPARE0);
        rtiStopCounter(rtiCOUNTER_BLOCK0);
        rtiResetCounter(rtiCOUNTER_BLOCK0);
    }
}

//***************
//notificaiton.c:
//***************
void rtiNotification(uint32 notification)
{
/*  enter user code between the USER CODE BEGIN and USER CODE END. */
/* USER CODE BEGIN (9) */
    RTI_TIMEOUT = 1;
/* USER CODE END */
}

To get the above code to work, I need to add another "while()" loop to wait for a tick to occur before the "rtiSetPeriod" takes effect.

Thanks!

Vince Toledo