exti.h

External interrupt support.

Types

struct exti_reg_map

EXTI register map type.

Public Members

__io uint32 IMR

Interrupt mask register.

__io uint32 EMR

Event mask register.

__io uint32 RTSR

Rising trigger selection register.

__io uint32 FTSR

Falling trigger selection register.

__io uint32 SWIER

Software interrupt event register.

__io uint32 PR

Pending register.

exti_trigger_mode enum

External interrupt trigger mode.

Values:

• EXTI_RISING -

  Trigger on the rising edge.

• EXTI_FALLING -

  Trigger on the falling edge.

• EXTI_RISING_FALLING -

  Trigger on both the rising and falling edges.

Devices

None at this time.

Functions

void exti_attach_interrupt(afio_exti_num num, afio_exti_port port, voidFuncPtr handler, exti_trigger_mode mode)

Register a handler to run upon external interrupt.

This function assumes that the interrupt request corresponding to the given external interrupt is masked.

Parameters:

• num -

  External interrupt line number.

• port -

  Port to use as source input for external interrupt.

• handler -

  Function handler to execute when interrupt is triggered.

• mode -

  Type of transition to trigger on, one of: EXTI_RISING, EXTI_FALLING, EXTI_RISING_FALLING.

See:

afio_exti_num

afio_exti_port

voidFuncPtr

exti_trigger_mode

void exti_detach_interrupt(afio_exti_num num)

Unregister an external interrupt handler.

Parameters:

• num -

  Number of the external interrupt line to disable.

See:

afio_exti_num

Register Map Base Pointers

EXTI_BASE

EXTI register map base pointer.

Register Bit Definitions

None at this time.