EINT

This section introduces the External Interrupt Controller(EINT) APIs including terms and acronyms, supported features, software architecture details on how to use this driver, EINT function groups, enums and functions. More...

Overview

This section introduces the External Interrupt Controller(EINT) APIs including terms and acronyms, supported features, software architecture details on how to use this driver, EINT function groups, enums and functions.

Terms and acronyms

Terms	Details
EINT	External Interrupt Controller.

Supported features

The EINT controller has been designed to process interrupts from an external source or peripheral. For more details, please refer to EINT datasheet.

• Support debounce
  Since the external event may be unstable in a certain period, a debounce mechanism is introduced to ensure the functionality. The circuitry is mainly used to verify that the input remains stable for a programmable number of periods of the clock. Call mtk_mhal_eint_set_debounce() function to set debounce time.

How to use this driver

• SW Architecture is as follows:
  See Overview of M-HAL SW Architecture for the details of SW architecture.

  This section describes the definition of APIs and provides an example on FreeRTOS about how to use these APIs to develop an OS-related EINT driver.
  

• The OS-HAL FreeRTOS driver sample code is as follows:
  freeRTos EINT sample code on github

Modules
	Define
	This section introduces the Macro definition which is used as EINT M-HAL's API error return type.
	Enum
	This section introduces the enumerations that EINT M-HAL used.
	Function
	This section provides Fixed APIs(defined as Common Interface) to fully control the MediaTek EINT HW.