TMS320F28379D: Using CPU2 to just run the ISR

Anuj Maheshwari

Part Number: TMS320F28379D

I have a time-critical ISR that I need to run on EPWM2 interrupt. Is it possible to offload that ISR to CPU2 but let CPU1 update the EPWM2Regs register to change its frequency and duty ratio? In essence, CPU2 only needs to run the ISR triggered by EPWM2 but the rest of the properties of EPWM is controlled by CPU1.

over 3 years ago

0 Vivek Singh over 3 years ago

TI__Guru** 115271 points

Hi,

Anuj Maheshwari said:
In essence, CPU2 only needs to run the ISR triggered by EPWM2 but the rest of the properties of EPWM is controlled by CPU1.

Yes, it's possibly but what exactly CPU2 ISR will do ? And how CPU1 will know when to update the EPWM2Regs registers ?

0 Anuj Maheshwari over 3 years ago in reply to Vivek Singh

Prodigy 80 points

The cpu2 isr will stop a cpuTimer and send some data to cpu 1. Cpu1 will update the epwm2regs in epwm1isr which is synchronized woth epwm2 using global sync.

0 Vivek Singh over 3 years ago in reply to Anuj Maheshwari

TI__Guru** 115271 points

Anuj,

That should work.

Regards,

Vivek Singh

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F28379D: Using CPU2 to just run the ISR