CCS/TMS570LC4357-EP: interrupt handler

Sanjana V

Part Number: TMS570LC4357-EP

Tool/software: Code Composer Studio

Hello,

I am toggling a GIO pin, and generating interrupt at the rising edge. I am able to see that the interrupt flags are getting set, but the ISR is not getting serviced. I am not able to resolve why the ISR (&gioHighLevelInterrupt in this case) is not getting serviced.

Please help me resolve the issue.

Do I have to configure any settings in the core registers? If so, how to do it?

Below is the code snippet of main function:

int main(void)
{
/* USER CODE BEGIN (3) */
/* USER CODE END */
    _enable_interrupt_ ();

       gioInit(); //GIO initialization

       gioEnableNotification(gioPORTA, 4); //enables interrupt for GIOA 4

       vimEnableInterrupt(9, 0); //enables interrupt for the selected channel

       vimChannelMap(2, 9, &gioHighLevelInterrupt); //maps the request to the respective channel

       gioToggleBit(gioPORTA, 6); //toggle GIOA 6

       while (1)
       {
           ;
       }

    return 0;
}

Please let me know if I have missed anything.

Regards

Sanjana V

over 5 years ago

0 Joe Josn over 5 years ago

Expert 1285 points

Sanjana,

One obvious issue is that you enabled interrupt on A4 not A6.

gioEnableNotification(gioPORTA, 4); //enables interrupt for GIOA 4

gioToggleBit(gioPORTA, 6); //toggle GIOA 6

You may also doublecheck the interrupt request # from GIO module. I "guess" the request should be 9, and the channel can be 2-95, so your arguments may be swapped.
vimChannelMap(2, 9, &gioHighLevelInterrupt); //maps the request to the respective channel

Also, should better to install ISR first before enabling interrupts.

Joe

0 QJ Wang over 5 years ago in reply to Joe Josn

TI__Guru**** 199096 points

Hello Sanjana,

1. To generate interrupt at GIOA[4], you need to feed an input to GIOA[4]. You can wire GIOA[6] to GIOA[4] based on your configuration (toggling GIOA[6])

2. To configure GIOA[4] interrupt to use HIGH level. The default is LOW level.

gioREG->LVLSET = (uint32)((uint32)1U << 4U) /* Bit 4 */

0 Sanjana V over 5 years ago in reply to Joe Josn

Prodigy 80 points

Hi Joe,

Thanks for the reply

I swapped the VIM arguments and it worked.

Thank you once again :)

Regards

Sanjana V

0 Sanjana V over 5 years ago in reply to QJ Wang

Prodigy 80 points

Hi Wang,

Thank you for the reply

Input was fed to GIOA[4] from GIOA[6] , where both the pins are wired.

High level interrupt was configured on GIOA[4].

I had went wrong in arguments passed to the VimMap function , and now the issue is resolved :)

Regards

Sanjana V

Arm-based microcontrollers

Arm-based microcontrollers forum

CCS/TMS570LC4357-EP: interrupt handler