Pico NVIC Deep Dive: Vector Table, NMI & Interrupt Priority Nesting
This tweet explains RP2040 interrupt architecture, IRQ allocation, NMI mechanism and NVIC priority rules.
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Project description
【Preliminary Note】The original hardware example in this article was written based on the RP2040. The actual hardware used in this hands-on demonstration features the W55RP20 as the main controller chip. The circuit logic and UF2 flashing operation principles are universally applicable, with only the main controller model differing. The original chip model mentioned in the circuit descriptions below is provided for reference purposes only. 1. Interrupt Each core (Core0 and Core1) has an independent NVIC, which acts as a dedicated "interrupt dispatcher" and can receive 32 interrupt signals…
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