In embedded systems, the processor often needs to handle multiple tasks such as monitoring sensors, controlling motors, and managing communication.
But what happens when an important event occurs while the CPU is busy? That’s where interrupts come in!
An interrupt is a signal that temporarily pauses the main program to handle a high-priority task, such as reading a sensor value or responding to a button press. Once the task is complete, the program resumes normal execution.
Types of Interrupts
1️⃣ Hardware Interrupt
Triggered by external devices like sensors, switches, or communication modules.
Example: A button press generates a hardware interrupt to notify the CPU.
2️⃣ Software Interrupt
Triggered by software instructions during program execution.
Example: A system call or specific routine that requests the processor’s attention.
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