Processing an Interrupt in C Language

A.3.1 Processing an Interrupt in C Language

Use #pragma interrupt to declare an interrupt function.

[Example]

C source code

#pragma interrupt func

void func(){ .... }

Generated code

_func:

     PUSHM R1-R3 ; Saves registers used in the function

...

     (R1, R2, and R3 are used in the function)

...

     POPM R1-R3 ; Restores registers that were saved at the function entry

RTE