![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
在MDK中有以下定义,计算中断的PR寄存器地址为 . #define EXTI ((EXTI_TypeDef *) EXTI_BASE) #define EXTI_BASE (APB2PERIPH_BASE + 0x0400) #define APB2PERIPH_BASE (PERIPH_BASE + 0x10000) #define PERIPH_BASE ((uint32_t)0x40000000) typedef struct { __IO uint32_t IMR; __IO uint32_t EMR; __IO uint32_t RTSR; __IO uint32_t FTSR; __IO uint32_t SWIER; __IO uint32_t PR; } EXTI_TypeDef;