9.3. Interrupt Service Routine (ISR)

Try these first

1. 1.

   What is the main purpose of an ISR?

   Hint

   Think about what ISRs need to accomplish when triggered.

2. 2.

   What does it mean for an ISR to have low-latency execution?

   Hint

   Consider why speed is important when responding to interrupts.

3. 3.

   What does an ISR do when it is triggered?

   • Stops all CPU processing
   • Acknowledge the interrupt and handle the event
   • Creates a new interrupt

   Hint

   Focus on what the ISR's primary role is.

4. 4.

   True or False: ISRs can take a long time to execute.

   • True
   • False

   Hint

   Consider the efficiency aspect of handling interrupts.

5. 5.

   Imagine a system running multiple ISRs. Discuss how you would design a strategy for context switching to handle high-frequency interrupts efficiently.

   Hint

   Think about the balance between speed and handling multiple events.

6. 6.

   Design an embedded system where multiple sensors use ISRs for reading data, ensuring that the system does not suffer from latencies. Outline your approach.

   Hint

   Consider resource management while handling multiple data sources.