9.2.3. Maskable Interrupts (IRQ)

Try these first

1. 1.

   What is a maskable interrupt?

   Hint

   Think about the CPU's ability to prioritize tasks.

2. 2.

   Give an example of a device that generates maskable interrupts.

   Hint

   Consider commonly used input devices.

3. 3.

   Maskable interrupts can be disabled by the CPU.

   • True
   • False

   Hint

   Consider the CPU's control over interrupts.

4. 4.

   Maskable interrupts are used for high-priority tasks.

   • True
   • False
   • It depends on the context

   Hint

   Think of how CPU prioritizes tasks.

5. 5.

   Develop a simple state machine that uses maskable interrupts to process input from a user interface device while ensuring higher-priority system tasks are processed without delay.

   Hint

   Focus on how to integrate event management with priority handling.

6. 6.

   Analyze how embedded systems can suffer from too many maskable interrupts and propose solutions to manage this effectively.

   Hint

   Consider the concept of interrupt buffering as a temporary management queue.