STM32 interrupt switch

Method 1

Control by bit band operation

To control the specific interruption line , change n that will do

 for example ：n = 1,  Namely   control   Interrupt the line  1

#define EXx *((volatile unsigned int *)(0x42000000+((uint32_t)&EXTI->IMR-0x40000000)*32+n*4))

Method 2

Register alias operation

#define EX0_ON EXTI->IMR |= EXTI_Line0
#define EX0_OFF EXTI->IMR &= ~(EXTI_Line0)