RTI for software configurable timers

Jamie,

How will you use those four timers? I am attaching a code snip for setting up RTI. You can also TI HALCoGen tool.

5554.rti_cfg.c

Thanks and regards,

Zhaohong

The timers will be used similar to a wait() command...but I don't want to have a wait(), while() or any similar construct that hangs up the code.

I've got something working where I have a timeout and expiry flag set up in my own rti routine. The timeout is the decremented in the rtiCompareXInterrupt and the expiry flag set when it reaches zero. My application can then simply poll the expiry flag to learn when the timeout has elapsed.

Here is the code:

Main Loop

		if(UNI_rtiCompare0_expire)
		{
			start_timer();
		}

Local Function

void start_timer(void)
{
	/* rtiDisableTimer()*/
	rtiDisableNotification(rtiNOTIFICATION_COMPARE3);
	UNI_rtiSetTimeout(timeout);
	rtiEnableNotification(rtiNOTIFICATION_COMPARE3);
}

RTI Routine

void UNI_rtiSetTimeout(uint32 timeout)
{
	UNI_rtiCompare0_TOUT = timeout;
	UNI_rtiCompare0_expire = FALSE;
/* USER CODE END */
}

void rtiCompare3Interrupt(void)
{
/* USER CODE BEGIN (83) */
	/* 1 SEC */
	UNI_rtiCompare0_TOUT--;
	if(UNI_rtiCompare0_TOUT > 0)
	{
		rtiREG1->INTFLAG = 8U;
	    rtiNotification(rtiNOTIFICATION_COMPARE3);
	}
	else
	{
		UNI_rtiCompare0_expire = TRUE;
		gioSetBit(hetPORT1,28,gioGetBit(hetPORT1,28)^1);
	}

This is working, the expiry flag correctly toggles for the required 'timeout'. Using this method I can run up to 4 timers of a specified resolution.

It would be nicer if I didn't need to decrement UNI_rtiCompare0_TOUT though and just configure the compare period appropriately, checking the interrupt status to know if the timer had expired. Is this possible?

Also, is it possible to know if the RTI has hung up? Is there a built-in error detection on RTI interrupt lock-up on the RM48?

Jamie

void rtiCompare3Interrupt(void)
{
/* USER CODE BEGIN (83) */
    /* 1 SEC */
    UNI_rtiCompare0_TOUT--;
    if(UNI_rtiCompare0_TOUT > 0)
    {
        rtiREG1->INTFLAG = 8U;
        rtiNotification(rtiNOTIFICATION_COMPARE3);
    }
    else
    {
        UNI_rtiCompare0_expire = TRUE;
        gioSetBit(hetPORT1,28,gioGetBit(hetPORT1,28)^1);
    }