Summary

Mike Silva's blog expands on the interrupt mechanism in microcontrollers, examining what happens during an interrupt request and response and how the CPU and peripherals interact. Readers will learn practical details on ISR entry/exit, context saving, prioritization and common pitfalls to write more reliable firmware.

Key Takeaways

• Explain the interrupt request/response sequence, including ISR entry/exit and context save/restore behavior.
• Describe how vector tables and priority schemes (including nesting and masking) determine which handler runs.
• Show how to avoid common pitfalls: interrupt latency, reentrancy issues, shared-data races, and stack overflows.
• Provide debugging and measurement techniques to profile interrupt latency and verify correct context handling.

Who Should Read This

Intermediate firmware engineers and embedded-systems students who implement low-level drivers, design ISRs, or troubleshoot interrupt-related issues on microcontrollers.

TimelessIntermediate

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