stm32 외부 인터럽트 EXTI

에서

 

남는 핀을 마우스코 쿡 찍어서 EXTI로 변경해준다.

 

 

 

 

 

 

Rising/Falling edge선택

 

 

NVIC에서 2,3,4, 9:5로 되어 있다.

2,3,4는 개별 인터럽트이고, 5~9번은 인터럽트 1개를 같이 사용한다.

 

 

 

 

코드생성

 

 

 

 

 

/** 
  * @brief External Interrupt/Event Controller
  */

typedef struct
{
  __IO uint32_t IMR;    /*!< EXTI Interrupt mask register,            Address offset: 0x00 */
  __IO uint32_t EMR;    /*!< EXTI Event mask register,                Address offset: 0x04 */
  __IO uint32_t RTSR;   /*!< EXTI Rising trigger selection register,  Address offset: 0x08 */
  __IO uint32_t FTSR;   /*!< EXTI Falling trigger selection register, Address offset: 0x0C */
  __IO uint32_t SWIER;  /*!< EXTI Software interrupt event register,  Address offset: 0x10 */
  __IO uint32_t PR;     /*!< EXTI Pending register,                   Address offset: 0x14 */
} EXTI_TypeDef;

 

#define EXTI                ((EXTI_TypeDef *) EXTI_BASE)

/******************  Bit definition for EXTI_RTSR register  *******************/
#define EXTI_RTSR_TR0_Pos         (0U)                                         
#define EXTI_RTSR_TR0_Msk         (0x1UL << EXTI_RTSR_TR0_Pos)                  /*!< 0x00000001 */
#define EXTI_RTSR_TR0             EXTI_RTSR_TR0_Msk                            /*!< Rising trigger event configuration bit of line 0 */
#define EXTI_RTSR_TR1_Pos         (1U)                                         
#define EXTI_RTSR_TR1_Msk         (0x1UL << EXTI_RTSR_TR1_Pos)                  /*!< 0x00000002 */
#define EXTI_RTSR_TR1             EXTI_RTSR_TR1_Msk                            /*!< Rising trigger event configuration bit of line 1 */

...

#define EXTI_RTSR_TR23_Pos        (23U)                                        
#define EXTI_RTSR_TR23_Msk        (0x1UL << EXTI_RTSR_TR23_Pos)                 /*!< 0x00800000 */
#define EXTI_RTSR_TR23            EXTI_RTSR_TR23_Msk                           /*!< Rising trigger event configuration bit of line 23 */

/******************  Bit definition for EXTI_FTSR register  *******************/
#define EXTI_FTSR_TR0_Pos         (0U)                                         
#define EXTI_FTSR_TR0_Msk         (0x1UL << EXTI_FTSR_TR0_Pos)                  /*!< 0x00000001 */
#define EXTI_FTSR_TR0             EXTI_FTSR_TR0_Msk                            /*!< Falling trigger event configuration bit of line 0 */
#define EXTI_FTSR_TR1_Pos         (1U)                                         
#define EXTI_FTSR_TR1_Msk         (0x1UL << EXTI_FTSR_TR1_Pos)                  /*!< 0x00000002 */
#define EXTI_FTSR_TR1             EXTI_FTSR_TR1_Msk                            /*!< Falling trigger event configuration bit of line 1 */

...

#define EXTI_FTSR_TR23_Pos        (23U)                                        
#define EXTI_FTSR_TR23_Msk        (0x1UL << EXTI_FTSR_TR23_Pos)                 /*!< 0x00800000 */
#define EXTI_FTSR_TR23            EXTI_FTSR_TR23_Msk                           /*!< Falling trigger event configuration bit of line 23 */