CCS/TMS570LC4357: RTI Notification Interrupt

user5009136

Tool/software: Code Composer Studio

/* USER CODE BEGIN (2) */
unsigned int start_app;
/* USER CODE END */

void main(void)
{
/* USER CODE BEGIN (3) */
    gioInit();
    rtiInit();

    /* enable Interrupts*/
    _enable_IRQ();

    rtiEnableNotification(rtiREG1,rtiNOTIFICATION_COMPARE0);
    rtiStartCounter(rtiREG1,rtiCOUNTER_BLOCK0);

    while(1){
        if(start_app){
            rtiResetCounter(rtiREG1,rtiCOUNTER_BLOCK0);
            start_app = 0;
            /* Execute TL generated Code (); */
            //Subsystem();
            gioSetBit(gioPORTB,6,1);
        }
        rtiStartCounter(rtiREG1,rtiCOUNTER_BLOCK0);
    }




void rtiNotification(rtiBASE_t *rtiREG, uint32 notification)
{
/*  enter user code between the USER CODE BEGIN and USER CODE END. */
/* USER CODE BEGIN (12) */
    rtiStopCounter(rtiREG1,rtiCOUNTER_BLOCK0);
    start_app = 1;
/* USER CODE END */
}

Hi,

i want that every 10ms an interrupt accurs and the LED gets on.

I cannot find my mistake.

thanks a lot

over 8 years ago

0 QJ Wang over 8 years ago

TI__Guru**** 199146 points

Hello,

1. set the GIOB6 pin direction as output

2. You don't need to reset the counter.

3. try this modification

rtiEnableNotification(rtiREG1,rtiNOTIFICATION_COMPARE0);
rtiStartCounter(rtiREG1,rtiCOUNTER_BLOCK0);
while(1){
}

void rtiNotification(rtiBASE_t *rtiREG, uint32 notification)
{
/* enter user code between the USER CODE BEGIN and USER CODE END. */
/* USER CODE BEGIN (12) */

gioSetBit(gioPORTB,6, gioGetBit(gioPORTB,6) ^ 0x01); //to toggle gio pin

start_app = 1;
/* USER CODE END */
}

0 user5009136 over 8 years ago in reply to QJ Wang

Prodigy 180 points

Thanks. It works well. But why i have not stop the counter?

I know the Counter is 64 Bit. But what happens when it gets to the last value? 2^63-1 ??

Thanks

0 Chuck Davenport over 8 years ago in reply to user5009136

TI__Guru 59540 points

Hello User,

When the counter reaches 0xFFFFFFFF_FFFFFFFF it will roll over to 0x00000000_00000000.

0 QJ Wang over 8 years ago in reply to Chuck Davenport

TI__Guru**** 199146 points

Hello,

It also generates an overflow interrupt (OVLINTx) to VIM if the overflow interrupt is enabled (RTISETINTENA register).

0 user5009136 over 8 years ago in reply to QJ Wang

Prodigy 180 points

Thanks!

What is the difference between the NHET and RTI? Both are using counters.
When there is a NHET, why there is a EPWM Module to generate PWM Signals?

Thanks a lot

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CCS/TMS570LC4357: RTI Notification Interrupt