Summary
In this chapter, we learned about the important role of interrupts in embedded systems development. Interrupts are essential for creating responsive and efficient firmware, allowing microcontrollers to handle real-time events effectively. By mastering the concepts of interrupts, you can develop systems that react promptly to external stimuli, enhancing the robustness and versatility of your embedded applications.
We started by exploring the fundamental role of interrupts in firmware, comparing them with exceptions to highlight their unique purposes and handling mechanisms. We then examined the specifics of the ISR, the IVT, and the NVIC, which together form the backbone of interrupt handling in Arm Cortex-M microcontrollers.
Next, we focused on the STM32 EXTI controller, a vital peripheral for managing external interrupts in STM32 microcontrollers. We discussed the key features and registers of the EXTI, and how to configure and utilize it for various applications.
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