TMS320F28055: Unable to call Timer 2 interrupt

Gb Adesiyun

Part Number: TMS320F28055
Other Parts Discussed in Thread: C2000WARE

Hi,

I am using the TMS320F28055 chip and I am working off of proj_lab01.c from the SpinTAC Labs Library. I am having trouble triggering a Timer 2 ISR. I can see that Timer 2 is working and I can control Timer 2 with the following library functions: TIMER_reload(obj->timerHandle[2]) , TIMER_start(obj->timerHandle[2]) and TIMER_stop(obj->timerHandle[2]). However, when I try to add my own Timer 2 ISR function, it never gets called. Below is the Timer 2 ISR function:

interrupt void timer2_ISR(void)
{
    timerisr_count++;
    HAL_Obj *obj = (HAL_Obj *)halHandle;
    HAL_toggleGpio(halHandle, HAL_Gpio_LED2)

}

Also, this is how I add the Timer 2 ISR to the PIE Vector Table in hal.h:

static inline void HAL_initIntVectorTable(HAL_Handle handle)
 {
  HAL_Obj *obj = (HAL_Obj *)handle;
  PIE_Obj *pie = (PIE_Obj *)obj->pieHandle;

  ENABLE_PROTECTED_REGISTER_WRITE_MODE;

  pie->Reset = (PIE_IntVec_t)0x0b55aa;
  pie->INT1 = NULL;
  pie->INT2 = (PIE_IntVec_t)0xbfff04;

  pie->XINT3 = &ChipSelectISR;
  pie->XINT1 = &IBFsignalISR;
  pie->XINT2 = &OBFsignalISR;

  pie->I2CINT1A = &i2caIntISR;

  pie->SCIRXINTA = &sciarxISR;
  pie->SCIRXINTB = &scibrxISR;
  pie->SCIRXINTC = &scicrxISR;
  pie->TINT2 = &timer2_ISR;

  DISABLE_PROTECTED_REGISTER_WRITE_MODE;

  return;
 }

Attached is a screenshot of the timer registers at runtime:

Is there something I'm missing or could someone send an example outlining the way to add a timer ISR to proj_lab01 of the InstantSpin Motion Labs Project?

Thanks,

2 months ago

0 Lakshya Verma 2 months ago

TI__Intellectual 2050 points

Hi,
Looking into it, will get back to you

0 Gb Adesiyun 2 months ago in reply to Lakshya Verma

Prodigy 20 points

Thank you

0 Gb Adesiyun 1 month ago in reply to Gb Adesiyun

Prodigy 20 points

Hi, just following up on this.

0 Lakshya Verma 1 month ago

TI__Intellectual 2050 points

Hi Gb,

A few points:

1. In your ISR function, use the __interrupt flag if using TI compiler to declare your ISR properly.

2. You need to ack and clear the interrupt flag. If you refer the timer example in the c2000ware SDK, you can see that how the interrupt is handled

3. Do you see your other ISR functions getting serviced? (Just to check if HAL_initIntVectorTable function is working fine)

Regards,
Lakshya

0 Gb Adesiyun 1 month ago in reply to Lakshya Verma

Prodigy 20 points

Hi Lakshya,

Okay, thanks. I've made the suggested changes. I placed the function PIE_ClearInt() in the timer ISR to clear the interrupt so I am following all the the steps needed to configure and use the timer ISR; unfortunately, the ISR is still not getting fired as I have a counter in the ISR and it is not getting incremented. Also, I am able to see other ISR functions getting serviced.

__interrupt void timer0_ISR(void)
{
    timerisr_count++;
    HAL_Obj *obj = (HAL_Obj *)halHandle;

    debug_c = 1;

    HAL_toggleGpio(halHandle, HAL_Gpio_LED2);

    // increment led count after led has turned on
    led_toggled_count++;

    PIE_clearInt(obj->pieHandle, PIE_GroupNumber_1);
    debug_d = 1;
}

0 Lakshya Verma 1 month ago in reply to Gb Adesiyun

TI__Intellectual 2050 points

HI Gb,
Is your timer working properly?
Can you share sample example, I may need more context to find the root cause of the issue.

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F28055: Unable to call Timer 2 interrupt