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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.
It is possible to perform read/write operations directly to the MSP and PSP provided that you are in privileged level, you can access MSP and PSP using the MRS and MSR instructions: MRS R0, MSP ; Read Main Stack Pointer to R0 MSR MSP, R0 ; Write R0 to Main Stack Pointer MRS R0, PSP ; Read Process Stack Pointer to R0 MSR PSP, R0 ; Write R0 to Process Stack Pointer
And I'm not!!! Actually not always to be exact.