Why is a received CAN message processed in a while loop and not during the interrupt?

Brandon Dixon

I'm new to microcontroller programming, and I'm learning using the Tiva Launchpad. The examples I'm looking at 'simple_rx.c' sets a receive flag during the CAN interrupt, then process the message during a while loop. Why not process the message during the interrupt? Is this bad practice?

over 11 years ago

0 Amit Ashara over 11 years ago

TI__Guru**** 244440 points

Hello Brandon,

Not a bad practice, but an example code with preferred practice. Normally an application will notified by an interrupt and a callback function will process the data.

Regards
Amit

0 Brandon Dixon over 11 years ago in reply to Amit Ashara

Prodigy 120 points

So should the amount of time in the interrupt be minimized?

0 Amit Ashara over 11 years ago in reply to Brandon Dixon

TI__Guru**** 244440 points

Hello Brandon,

Yes, otherwise you may end up with more interrupts queued than being able to process the data in the main application.

Regards
Amit

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Why is a received CAN message processed in a while loop and not during the interrupt?