WDT

These sections introduce the Watchdog Timer (WDT), including terms and acronyms, supported features. More...

Overview

These sections introduce the Watchdog Timer (WDT), including terms and acronyms, supported features.

And the usage of these APIs and current system case of WDT are introduced in the section on how to use this driver.

Terms and Acronyms

Terms	Details
WDT	Watchdog Timer
HW-RST	Hardware Reset. It can be provided by WDT counter timeout(hwrst)
SW-RST	Software Reset. It can be provided by WDT function(swrst)

Supported Features

Each IO-CM4 has one WDT device respectively to support system operation monitoring.
WDT device provides the counter with the 32kHz clock source and it can trigger two types of events: interrupt and reset. And there are two ways to trigger these events: counter timeout(HW-RST) and setting swrst register (SW-RST).
For more details, please refer the WDT datasheet.

How to Use This Driver

• SW Architecture:
  See Overview of M-HAL SW Architecture for details of SW architecture.
  This section describes the definition of APIs and provides an example on freeRTos to show to use these APIs to develop an OS-related WDT driver.
  Also, this section provides an example about the sequence of APIs that should be used by the WDT driver.
  
• The OS-HAL freeRTos driver sample code is as follows:
  freeRTos WDT sample code on github

Modules
	Define
	This section introduces the macro definitions which are used by WDT M-HAL's APIs error return type.
	Function
	This section provides Fixed APIs(defined as Common Interface) to fully control the MediaTek WDT HW.
	Struct
	This section introduces the structure used by WDT M-HAL used.