TIDM-1007: Voltage loop interrupt handling details

Brian Wang0

Part Number: TIDM-1007
Other Parts Discussed in Thread: TIDM-02002

Hi experts,

When we are looking at the voltageLoopPlusInstrumentationCode() function in tenKHzISR(void), we noticed this function is started with EINT command.

Normally, we do not need to manually enable the global interrupt. Why an 'EINT' command is needed here? Is it for interrupt nesting?

Regards,

Brian

over 3 years ago

0 Manish Bhardwaj over 3 years ago

TI__Mastermind 43730 points

Brian,

yes, the current loop has priority hence we need to enable interrupt with EINT so the current loop can nest the voltage loop.

0 Brian Wang0 over 3 years ago in reply to Manish Bhardwaj

TI__Expert 5120 points

Hi Manish,

According to our errata, if a EINT is manually added to achieve interrupt nesting, a DINT must be added before exiting the ISR. Seems there is no such operation in the demo code, any idea why this is missing?

Regards,

Brian

0 Manish Bhardwaj over 3 years ago in reply to Brian Wang0

TI__Mastermind 43730 points

Brian,

We only have two interrupts, not disabling the interrupts can be an issue if there are more ISRs.

We do so on some other designs such as TIDM-02002 where we have 3 ISRs,

In the context of this example, it will not affect the behavior.

I do agree on that this is the right practice and we should edit the code to reflect it. Thanks for bringing it to my attention.

-Manish

C2000™︎ microcontrollers

C2000 microcontrollers forum

TIDM-1007: Voltage loop interrupt handling details