Tag
NVIC
Technical notes tagged NVIC.
2026-06-11
STM32 EXTI at Register Level:SYSCFG, GPIO Interrupt Mapping, and NVIC Wiring
Configure STM32 EXTI external interrupts without HAL: SYSCFG_EXTICR GPIO mapping, EXTI rising/falling edge triggers, interrupt mask, pending flag clearing, and NVIC integration. Register-level walkthrough on STM32F4 with a practical push-button example.
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2026-05-30
STM32 NVIC Priority Grouping: Why Your Interrupt Preemption Is Not Working as Expected
A practical STM32 firmware guide to NVIC priority grouping, PRIGROUP, preempt vs subpriority, the AIRCR register, and how misconfiguration causes priority inversion in production.
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