Watchdog Manager#

sl_watchdog_manager_reset_reason_t#

sl_watchdog_manager_reset_reason_t

Reason for the system being reset.

This enumeration defines the possible reasons for the system being reset. It includes power-on reset, watchdog reset, and software-invoked reset.

sl_watchdog_manager_wdog_timeout_t#

sl_watchdog_manager_wdog_timeout_t

Enumeration to represent possible time delay values for Watchdog Timer (WDT) interrupt time and system reset time with 32 kHz clock frequency.

This enumeration defines the possible time delays for the WDT interrupt and system reset times. The delays are based on a 32 kHz clock frequency.

sl_watchdog_manager_init#

sl_status_t sl_watchdog_manager_init (void )

To configure the watchdog manager service.

Configures the hardware watchdog timer.

• The 91x watchdog peripheral's interrupt interval is set to 2 seconds less than the configured value of SL_WDT_MANAGER_INTERRUPT_TIME. The hardware watchdog triggers an interrupt when this timeout expires, allowing the software to feed the watchdog within this interval.

  • Assigns a system reset value to 4 seconds. If the WDT is not reset within this interval, the system will reset after 4 seconds. The reset counter begins counting after the interrupt time expires. The system reset value is updated based on the configured interrupt time, referenced by SL_SI91X_WATCHDOG_MANAGER_TIMEOUT_PERIOD.

Returns

• sl_status_t Status code indicating the result:

  • SL_STATUS_OK - Success

  • SL_STATUS_FAIL - Generic error

For more information on status codes, refer to SL STATUS DOCUMENTATION.

sl_watchdog_manager_start#

sl_status_t sl_watchdog_manager_start (void )

To start the watchdog manager service.

This function starts the WDT and begins counting. The hardware watchdog triggers an interrupt when the WDT timeout interval expires.

• Pre-conditions:

  • sl_watchdog_manager_init must be called before this function.

Returns

• sl_status_t Status code indicating the result:

  • SL_STATUS_OK - Success

  • SL_STATUS_FAIL - Generic error

For more information on status codes, refer to SL STATUS DOCUMENTATION.

sl_wdt_manager_get_system_reset_status#

sl_watchdog_manager_reset_reason_t sl_wdt_manager_get_system_reset_status (void )

To retrieve the system reset reason.

Returns the reason for the system being reset. This may be invoked during a startup flow to determine if the system has recovered from an error condition such as a crash.

Returns

• sl_watchdog_manager_reset_reason_t Enumeration value indicating the reset reason:

  • SL_SI91X_WATCHDOG_MANAGER_RESET_WATCHDOG - WDT System Reset

  • SL_SI91X_WATCHDOG_MANAGER_RESET_SOFTWARE - Software System Reset

  • SL_SI91X_WATCHDOG_MANAGER_RESET_POR - Power-on Reset

sl_watchdog_disable_wdt_in_sleep#

void sl_watchdog_disable_wdt_in_sleep (void )

To disable the hardware watchdog in sleep mode.

This function stops the WDT counter from running when the system enters sleep mode.

• Pre-conditions:

  • sl_watchdog_manager_init must be called before this function.

Note

• This function does not return a status code.

sl_watchdog_enable_wdt_in_sleep#

void sl_watchdog_enable_wdt_in_sleep (void )

To enable the hardware watchdog in sleep mode.

This function starts the WDT counter running in sleep mode. It enables the WDT as a wake-up source to the system to serve the ISR and kick the watchdog.

• Pre-conditions:

  • sl_watchdog_manager_init must be called before this function.

SL_SI91X_WAKEUP_INDICATION#

#define SL_SI91X_WAKEUP_INDICATION

BIT(0)

Wake-up event.

SL_SI91X_TIMEOUT_WAKEUP#

#define SL_SI91X_TIMEOUT_WAKEUP

BIT(1)

Timeout wake-up.

SL_SI91X_HOST_BASED_WAKEUP_S#

#define SL_SI91X_HOST_BASED_WAKEUP_S

BIT(2)

Host wake-up.

SL_SI91X_MCU_PROCESSOR_WAKE_STAT#

#define SL_SI91X_MCU_PROCESSOR_WAKE_STAT

BIT(4)

MCU wake-up status.

SL_SI91X_MCU_WWD_RESET#

#define SL_SI91X_MCU_WWD_RESET

BIT(5)

MCU watchdog reset.

SL_SI91X_MCU_WWD_WINDOW_RESET#

#define SL_SI91X_MCU_WWD_WINDOW_RESET

BIT(6)

MCU watchdog window reset.

SL_SI91X_NWP_WWD_RESET#

#define SL_SI91X_NWP_WWD_RESET

BIT(8)

Network processor watchdog reset.

SL_SI91X_NWP_WWD_WINDOW_RESET#

#define SL_SI91X_NWP_WWD_WINDOW_RESET

BIT(9)

Network processor watchdog window reset.

SL_SI91X_HOST_RESET_REQUEST#

#define SL_SI91X_HOST_RESET_REQUEST

BIT(10)

Host reset request.

SL_SI91X_WDT_RESET#

#define SL_SI91X_WDT_RESET

Watchdog reset status flags.

This macro combines multiple watchdog reset status flags, indicating various watchdog reset sources:

• MCU watchdog window reset

• MCU watchdog reset

• Network processor watchdog window reset

• Network processor watchdog reset

• Host reset request