ARM Architecture - Exception and Interrupt Model
Identify the error in this code snippet that tries to enable SysTick interrupts:
SysTick->LOAD = 5000;
SysTick->VAL = 0;
SysTick->CTRL = 3;
Identify the error in this code snippet that tries to enable SysTick interrupts:
medium📝 Analysis Q6 of 15
Step-by-Step Solution
Solution:
Step 1: Check LOAD register usage
LOAD should be set to desired count minus 1 because counting starts from zero.Step 2: Validate other registers
VAL=0 is correct to clear current count; CTRL=3 enables counter and interrupt.Final Answer:
LOAD value should be one less than the desired count -> Option CQuick Check:
LOAD = desired count - 1 [OK]
Quick Trick: LOAD register = count minus one for SysTick [OK]
Common Mistakes:
- Setting LOAD to exact count value
- Thinking VAL=0 is invalid
- Misunderstanding CTRL bits
Master "Exception and Interrupt Model" in ARM Architecture
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore ARM Architecture Quizzes