How can ARM exceptions be used to implement a real-time clock interrupt that updates a timer every second?

hard📝 Application Q8 of 15

ARM Architecture - Exception and Interrupt Model

AReset the processor every second to update timer

BUse software polling to check time without exceptions

CSet a hardware timer to trigger an exception every second, then update timer in handler

DDisable exceptions and update timer in main loop

Step-by-Step Solution

Solution:

Step 1: Use hardware timer to generate exceptions
Configure a timer to raise an exception interrupt every second.
Step 2: Update timer inside exception handler
In the handler, increment or update the timer value safely and quickly.
Final Answer:
Set a hardware timer to trigger an exception every second, then update timer in handler -> Option C
Quick Check:
Hardware timer + exception handler = real-time update [OK]

Quick Trick: Use timer exceptions for precise periodic updates [OK]

Common Mistakes:

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