STM32F4 Standard Peripheral bibliotheek  1.0
ST Microelectronics bibliotheek documentatie voor de STM32F4 Standard Peripheral Library
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Modules | Macros | Functions
WWDG
STM32F4xx_StdPeriph_Driver

WWDG driver modules. More...

Modules

 WWDG_Exported_Constants
 
 WWDG_Private_Functions
 

Macros

#define WWDG_OFFSET   (WWDG_BASE - PERIPH_BASE)
 
#define CFR_OFFSET   (WWDG_OFFSET + 0x04)
 
#define EWI_BitNumber   0x09
 
#define CFR_EWI_BB   (PERIPH_BB_BASE + (CFR_OFFSET * 32) + (EWI_BitNumber * 4))
 
#define CFR_WDGTB_MASK   ((uint32_t)0xFFFFFE7F)
 
#define CFR_W_MASK   ((uint32_t)0xFFFFFF80)
 
#define BIT_MASK   ((uint8_t)0x7F)
 

Functions

void WWDG_DeInit (void)
 Deinitializes the WWDG peripheral registers to their default reset values. More...
 
void WWDG_SetPrescaler (uint32_t WWDG_Prescaler)
 Sets the WWDG Prescaler. More...
 
void WWDG_SetWindowValue (uint8_t WindowValue)
 Sets the WWDG window value. More...
 
void WWDG_EnableIT (void)
 Enables the WWDG Early Wakeup interrupt(EWI). More...
 
void WWDG_SetCounter (uint8_t Counter)
 Sets the WWDG counter value. More...
 
void WWDG_Enable (uint8_t Counter)
 Enables WWDG and load the counter value. More...
 
FlagStatus WWDG_GetFlagStatus (void)
 Checks whether the Early Wakeup interrupt flag is set or not. More...
 
void WWDG_ClearFlag (void)
 Clears Early Wakeup interrupt flag. More...
 

Detailed Description

WWDG driver modules.

Function Documentation

void WWDG_ClearFlag ( void  )

Clears Early Wakeup interrupt flag.

Parameters
None
Return values
None
void WWDG_DeInit ( void  )

Deinitializes the WWDG peripheral registers to their default reset values.

Parameters
None
Return values
None
void WWDG_Enable ( uint8_t  Counter)

Enables WWDG and load the counter value.

Parameters
Counter,:specifies the watchdog counter value. This parameter must be a number between 0x40 and 0x7F (to prevent generating an immediate reset)
Return values
None
void WWDG_EnableIT ( void  )

Enables the WWDG Early Wakeup interrupt(EWI).

Note
Once enabled this interrupt cannot be disabled except by a system reset.
Parameters
None
Return values
None
FlagStatus WWDG_GetFlagStatus ( void  )

Checks whether the Early Wakeup interrupt flag is set or not.

Parameters
None
Return values
Thenew state of the Early Wakeup interrupt flag (SET or RESET)
void WWDG_SetCounter ( uint8_t  Counter)

Sets the WWDG counter value.

Parameters
Counter,:specifies the watchdog counter value. This parameter must be a number between 0x40 and 0x7F (to prevent generating an immediate reset)
Return values
None
void WWDG_SetPrescaler ( uint32_t  WWDG_Prescaler)

Sets the WWDG Prescaler.

Parameters
WWDG_Prescaler,:specifies the WWDG Prescaler. This parameter can be one of the following values:
  • WWDG_Prescaler_1: WWDG counter clock = (PCLK1/4096)/1
  • WWDG_Prescaler_2: WWDG counter clock = (PCLK1/4096)/2
  • WWDG_Prescaler_4: WWDG counter clock = (PCLK1/4096)/4
  • WWDG_Prescaler_8: WWDG counter clock = (PCLK1/4096)/8
Return values
None
void WWDG_SetWindowValue ( uint8_t  WindowValue)

Sets the WWDG window value.

Parameters
WindowValue,:specifies the window value to be compared to the downcounter. This parameter value must be lower than 0x80.
Return values
None