STM32F439xx HAL User Manual
Functions
Configuration
WWDG Exported Functions

Functions

__STATIC_INLINE void LL_WWDG_Enable (WWDG_TypeDef *WWDGx)
 Enable Window Watchdog.
__STATIC_INLINE uint32_t LL_WWDG_IsEnabled (WWDG_TypeDef *WWDGx)
 Checks if Window Watchdog is enabled.
__STATIC_INLINE void LL_WWDG_SetCounter (WWDG_TypeDef *WWDGx, uint32_t Counter)
 Set the Watchdog counter value to provided value (7-bits T[6:0])
__STATIC_INLINE uint32_t LL_WWDG_GetCounter (WWDG_TypeDef *WWDGx)
 Return current Watchdog Counter Value (7 bits counter value)
__STATIC_INLINE void LL_WWDG_SetPrescaler (WWDG_TypeDef *WWDGx, uint32_t Prescaler)
 Set the time base of the prescaler (WDGTB).
__STATIC_INLINE uint32_t LL_WWDG_GetPrescaler (WWDG_TypeDef *WWDGx)
 Return current Watchdog Prescaler Value.
__STATIC_INLINE void LL_WWDG_SetWindow (WWDG_TypeDef *WWDGx, uint32_t Window)
 Set the Watchdog Window value to be compared to the downcounter (7-bits W[6:0]).
__STATIC_INLINE uint32_t LL_WWDG_GetWindow (WWDG_TypeDef *WWDGx)
 Return current Watchdog Window Value (7 bits value)

Function Documentation

__STATIC_INLINE void LL_WWDG_Enable ( WWDG_TypeDef *  WWDGx)

Enable Window Watchdog.

The watchdog is always disabled after a reset.

Note:
It is enabled by setting the WDGA bit in the WWDG_CR register, then it cannot be disabled again except by a reset. This bit is set by software and only cleared by hardware after a reset. When WDGA = 1, the watchdog can generate a reset.
Reference Manual to LL API cross reference:
CR WDGA LL_WWDG_Enable
Parameters:
WWDGxWWDG Instance
Return values:
None

Definition at line 145 of file stm32f4xx_ll_wwdg.h.

__STATIC_INLINE uint32_t LL_WWDG_GetCounter ( WWDG_TypeDef *  WWDGx)

Return current Watchdog Counter Value (7 bits counter value)

Reference Manual to LL API cross reference:
CR T LL_WWDG_GetCounter
Parameters:
WWDGxWWDG Instance
Return values:
7bit Watchdog Counter value

Definition at line 183 of file stm32f4xx_ll_wwdg.h.

__STATIC_INLINE uint32_t LL_WWDG_GetPrescaler ( WWDG_TypeDef *  WWDGx)

Return current Watchdog Prescaler Value.

Reference Manual to LL API cross reference:
CFR WDGTB LL_WWDG_GetPrescaler
Parameters:
WWDGxWWDG Instance
Return values:
Returnedvalue can be one of the following values:

Definition at line 216 of file stm32f4xx_ll_wwdg.h.

__STATIC_INLINE uint32_t LL_WWDG_GetWindow ( WWDG_TypeDef *  WWDGx)

Return current Watchdog Window Value (7 bits value)

Reference Manual to LL API cross reference:
CFR W LL_WWDG_GetWindow
Parameters:
WWDGxWWDG Instance
Return values:
7bit Watchdog Window value

Definition at line 248 of file stm32f4xx_ll_wwdg.h.

__STATIC_INLINE uint32_t LL_WWDG_IsEnabled ( WWDG_TypeDef *  WWDGx)

Checks if Window Watchdog is enabled.

Reference Manual to LL API cross reference:
CR WDGA LL_WWDG_IsEnabled
Parameters:
WWDGxWWDG Instance
Return values:
Stateof bit (1 or 0).

Definition at line 156 of file stm32f4xx_ll_wwdg.h.

__STATIC_INLINE void LL_WWDG_SetCounter ( WWDG_TypeDef *  WWDGx,
uint32_t  Counter 
)

Set the Watchdog counter value to provided value (7-bits T[6:0])

Note:
When writing to the WWDG_CR register, always write 1 in the MSB b6 to avoid generating an immediate reset This counter is decremented every (4096 x 2expWDGTB) PCLK cycles A reset is produced when it rolls over from 0x40 to 0x3F (bit T6 becomes cleared) Setting the counter lower then 0x40 causes an immediate reset (if WWDG enabled)
Reference Manual to LL API cross reference:
CR T LL_WWDG_SetCounter
Parameters:
WWDGxWWDG Instance
Counter0..0x7F (7 bit counter value)
Return values:
None

Definition at line 172 of file stm32f4xx_ll_wwdg.h.

__STATIC_INLINE void LL_WWDG_SetPrescaler ( WWDG_TypeDef *  WWDGx,
uint32_t  Prescaler 
)

Set the time base of the prescaler (WDGTB).

Note:
Prescaler is used to apply ratio on PCLK clock, so that Watchdog counter is decremented every (4096 x 2expWDGTB) PCLK cycles
Reference Manual to LL API cross reference:
CFR WDGTB LL_WWDG_SetPrescaler
Parameters:
WWDGxWWDG Instance
PrescalerThis parameter can be one of the following values:
Return values:
None

Definition at line 201 of file stm32f4xx_ll_wwdg.h.

__STATIC_INLINE void LL_WWDG_SetWindow ( WWDG_TypeDef *  WWDGx,
uint32_t  Window 
)

Set the Watchdog Window value to be compared to the downcounter (7-bits W[6:0]).

Note:
This window value defines when write in the WWDG_CR register to program Watchdog counter is allowed. Watchdog counter value update must occur only when the counter value is lower than the Watchdog window register value. Otherwise, a MCU reset is generated if the 7-bit Watchdog counter value (in the control register) is refreshed before the downcounter has reached the watchdog window register value. Physically is possible to set the Window lower then 0x40 but it is not recommended. To generate an immediate reset, it is possible to set the Counter lower than 0x40.
Reference Manual to LL API cross reference:
CFR W LL_WWDG_SetWindow
Parameters:
WWDGxWWDG Instance
Window0x00..0x7F (7 bit Window value)
Return values:
None

Definition at line 237 of file stm32f4xx_ll_wwdg.h.