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THExplanation....👇
⚡ Day 205 of Posting Mechatronics Daily ⚡
🔎 What is Polling?
In polling mode, the CPU continuously checks (busy-waits) the status of input/output devices to see if they need attention.
👉 It’s simple but wastes CPU time ⏳ since the processor can’t do anything else while “asking.”
👉 That’s why interrupts are often preferred — the device itself tells the CPU when it needs service. 🚨
Polling Mode in microcontrollers be like:
CPU – “Hey Input? Anything new?” 👀
I/O – “Nope… still nothing.”
CPU – “Okay, checking again… and again… and again…” 😂💀
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