Differences between interrupt service routine (ISR) and a subroutine
- From: "2005" <uws2003@xxxxxxxxx>
- Date: 28 Nov 2006 10:02:16 -0800
Hi
What are the differences between ISR and a subroutine in embedded
systems, how about the following:
- interrupts are disabled by the microprocessor prior to calling the
isr
- isr's are always smaller
- an isr cannot be written in C
- a subroutine always has arguments
- the CPU flags are stored on the stack in addition to the return
address
Thanks
.
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