STM32是以Cortex-M3为核的处理器，该例程介绍STM32下如何对外部中断进行配置和操作。在许多情况下，我们需要将外部引脚配置为中断，该例程介绍了如何设置和操作外部中断。-Cortex-M3 based STM32-core processor for the routine introduction STM32 how to configure the external interrupt on and operate. In many cases, we need to config