Wdt

These sections introduce the Watchdog Timer (WDT) APIs including terms and acronyms, supported features, details on how to use this driver, enums, structures and functions. More...

Overview

These sections introduce the Watchdog Timer (WDT) APIs including terms and acronyms, supported features, details on how to use this driver, enums, structures and functions.

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

See Supported Features for the details of Supported Features.

How to Use This Driver

• Device driver sample code is as follows:
  
  • sample code (this is the user application sample code on freeRTos):

    - Initialize WDT driver:
      - Call mtk_os_hal_wdt_init() to initialize WDT driver.
    
    - Configure WDT timeout value:
      - Call mtk_os_hal_wdt_set_timeout(T) to set WDT timeout value as T
        second.
    
    - Configure WDT as interrupt mode:
      - Define a variable "struct os_wdt_int wdt_int" if necessary.
      - Call mtk_os_hal_wdt_register_irq(&wdt_int) to register WDT user
        interrupt callback handle and user data. (If input NULL to
        mtk_os_hal_wdt_register_irq(), the default callback handle will be
        registered which will reset system immediately.)
      - Call mtk_os_hal_wdt_config(OS_WDT_TRIGGER_IRQ) to sec WDT as
        interrupt mode.
    
    - Configure WDT as reset mode:
      - Call mtk_os_hal_wdt_config(OS_WDT_TRIGGER_RESET) to sec WDT as
        reset mode.
    
    - Enable/disable WDT:
      - Call mtk_os_hal_wdt_enable() and mtk_os_hal_wdt_disable() to enable/
        disable WDT.
    
    - Restart WDT counter:
      - Call mtk_os_hal_wdt_restart() to restart WDT counter.
    
    - Trigger system reset immediately:
      - Call mtk_os_hal_wdt_sw_reset() to trigger SW-RST immediately.
      - Call mtk_os_hal_wdt_hw_reset() to trigger HW-RST immediately.

Modules
	Enum
	This section introduces the enumerations used by WDT OS-HAL used.
	Function
	This section provides high level APIs to upper layer.
	Struct
	This section introduces the structure used by WDT OS-HAL used.