EXTI寄存器

 

SYSCFG external interrupt configuration register 1

SYSCFG_EXTICR1

EXTI中断0,1,2,3引脚选择

 EXTIx[3:0]: EXTI x configuration (x = 0 to 3)

0000: PA[x] pin 0001: PB[x] pin 0010: PC[x] pin 0011: PD[x] pin 0100: PE[x] pin 0101: Reserved 0110: Reserved 0111: PH[x] pin

SYSCFG_EXTICR2 配置 EXTI4，5，6，7

SYSCFG_EXTICR3 配置 EXTI8，9，10，11

SYSCFG_EXTICR4 配置EXTI12，13，14，15

 

EXTI_IMR	Interrupt mask register 中断屏蔽寄存器	MRx  0 : x is masked 1 : x is not masked
EXTI_EMR	Event mask register 事件屏蔽寄存器	MRx 0：x is masked 1： x is not masked
EXTI_RTSR	Rising trigger selection register 上升沿触发选择寄存器	TRx 0: Rising trigger disabled (for Event and Interrupt) for input line 1:Rising trigger enabled (for Event and Interrupt) for input line	可以同时设置上升下降沿
EXTI_FTSR	Falling trigger selection register 下降沿触发选择寄存器	TRx 0: Falling trigger disabled (for Event and Interrupt) for input line 1: Falling trigger enabled (for Event and Interrupt) for input line.
EXTI_SWIER	Software interrupt event register 软件中断事件寄存器	SWIERx 为0时 写1 产生中断 为1时 写1 清除该位为0
EXTI_PR	Pending register 挂起寄存器	PRx 0: No trigger request occurred 1: selected trigger request occurred 发生边沿事件，该位被置1 写1清除