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From my code I need to figure out has my function been called from the ISR or just regular application code. I do know that application is running is the User Thread mode and ISR is in privileged handler mode. Could you anyone please provide me with the sources of C-function(s) or inline assembly which will let me efficiently solve this issue.
Thanks.
Tapir,
Why do you say "I think"?
Are you still unsure of the rules for register preservation.
Let's give it a few more years.