Can I do floating point operations in interrupt handler ? (x86 or 64) Also I would like know can I use print function inside the interrupt handler ?
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Can I do floating point operations in interrupt handler ? (x86 or 64) Also I would like know can I use print function inside the interrupt handler ?
Inside an interrupt handler, don’t use anything that can block. That means don’t use print functions unless they are non-blocking. Ideally, your ISR should do the bare minimum needed to clear the interrupt and then launch a normal thread to do the rest of the processing. If you need the print statements for debugging, then consider having the non-ISR part of your program declare a global, volatile buffer and have your ISR write your debug data into it. Your non-ISR code can check the buffer and
printfthe data from it if needed.You should avoid floating-point operations inside an ISR (and in kernel code in general) as well.