3.2.3. PendSV and SysTick

Try these first

1. 1.

   What is PendSV primarily used for?

   Hint

   Think about how tasks are paused and resumed.

2. 2.

   What role does SysTick play in the Cortex-M0?

   Hint

   Recall how timing is crucial in various applications.

3. 3.

   What does PendSV stand for?

   • Pendable Service Interrupt
   • Pending Service Interrupt
   • Processable Service Interrupt

   Hint

   Think about its functionality in task management.

4. 4.

   True or False: SysTick is used for generating one-time interrupts only.

   • True
   • False

   Hint

   Reflect on its naming; 'Tick' implies recurrence.

5. 5.

   Design a simple embedded system using PendSV and SysTick that manages three tasks: temperature logging, LCD display updates, and alarm notifications. Explain how these components interact.

   Hint

   Consider how often each task needs to run simultaneously.

6. 6.

   Evaluate the performance impact of excessive context switching versus optimizing task intervals with SysTick. Discuss potential solutions to manage this in a real-time system.

   Hint

   Think about balancing task loads.