TMS320F280037: C28 generates illegal operation interrupt after CLA task completes

DTruex

Part Number: TMS320F280037

Tool/software:

C2800 is in a loop blinking an LED. ADC and PWM are running, ADC triggers CLA task 1. All other code has been removed for troubleshooting.

CLA task 1 increments a counter.

C2800 branches to illegal operation ISR when CLA task 1 exits.

If I debug the CLA, C28 will continue to run (LED continues to blink) while CLA is paused but will branch to illegal operation ISR as soon as task 1 is completed. If CLA task 1 is disabled in the CLA init code, C28 runs without branching to illegal operation.

What could cause this problem?

Thanks

over 1 year ago

0 DTruex over 1 year ago

Intellectual 790 points

Update.

I changed Task1 to Task2 in Interrupt_register(), CLA_setTriggerSource(), and CLA_enableTasks() and moved the counter increment code from CLA1Task1 to CLA1Task2 and everything works as expected without branching to the illegal operation ISR.