From the course: IoT Foundations: Operating Systems Fundamentals

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Interrupts

Interrupts

From the course: IoT Foundations: Operating Systems Fundamentals

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Interrupts

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- [Narrator] To manage data from different peripheral devices, we need the mechanism that alerts us when data is ready for processing. For example, when the wireless network interface on an IOT device receives messages, our program must read and handle them promptly to ensure timely processing. Interrupts provide this mechanism in operating system, allowing hardware devices to signal the processor when they require immediate attention, Typically due to available data or a service request. And interrupt is a hardware signal that pauses the CPU to respond through and interrupt service routine, or ISR. An ISR is implemented as a function that can interrupt the execution of regular tasks to handle real-time events. While an ISR is not a regular task, it can be thought of as a special kind of task that operates under different constraints and priorities. ISRs often need to share data with regular tasks, but they typically use a separate set of API functions to do so, particularly in RTOS<…

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