9.4.3. Interrupt Nesting

Try these first

1. 1.

   What happens when a higher-priority interrupt occurs while a lower-priority ISR is executing?

   Hint

   Think about how the CPU prioritizes tasks.

2. 2.

   Define what an ISR is.

   Hint

   Consider what the CPU does when an event occurs.

3. 3.

   What is interrupt nesting?

   • A. The ability for an ISR to run indefinitely
   • B. A method to disable all interrupts
   • C. Higher-priority interrupts preempt lower-priority ISRs

   Hint

   Think about how the CPU prioritizes interrupt handling.

4. 4.

   True or False: A stack overflow can occur if too many interrupts are nested without proper management.

   • True
   • False

   Hint

   Consider the limitations of system memory.

5. 5.

   Design a simple system that utilizes interrupt nesting. Describe how it functions and outline the potential risks associated.

   Hint

   Consider how various tasks interact in your design.

6. 6.

   Discuss the implications of stack overflow in systems with interrupt nesting and propose a solution to mitigate this risk.

   Hint

   Think about how systems allocate resources dynamically.