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

IWDG driver modules. More...

Modules

 IWDG_Exported_Constants
 
 IWDG_Private_Functions
 

Macros

#define KR_KEY_RELOAD   ((uint16_t)0xAAAA)
 
#define KR_KEY_ENABLE   ((uint16_t)0xCCCC)
 

Functions

void IWDG_WriteAccessCmd (uint16_t IWDG_WriteAccess)
 Enables or disables write access to IWDG_PR and IWDG_RLR registers. More...
 
void IWDG_SetPrescaler (uint8_t IWDG_Prescaler)
 Sets IWDG Prescaler value. More...
 
void IWDG_SetReload (uint16_t Reload)
 Sets IWDG Reload value. More...
 
void IWDG_ReloadCounter (void)
 Reloads IWDG counter with value defined in the reload register (write access to IWDG_PR and IWDG_RLR registers disabled). More...
 
void IWDG_Enable (void)
 Enables IWDG (write access to IWDG_PR and IWDG_RLR registers disabled). More...
 
FlagStatus IWDG_GetFlagStatus (uint16_t IWDG_FLAG)
 Checks whether the specified IWDG flag is set or not. More...
 

Detailed Description

IWDG driver modules.

Function Documentation

void IWDG_Enable ( void  )

Enables IWDG (write access to IWDG_PR and IWDG_RLR registers disabled).

Parameters
None
Return values
None
FlagStatus IWDG_GetFlagStatus ( uint16_t  IWDG_FLAG)

Checks whether the specified IWDG flag is set or not.

Parameters
IWDG_FLAG,:specifies the flag to check. This parameter can be one of the following values:
  • IWDG_FLAG_PVU: Prescaler Value Update on going
  • IWDG_FLAG_RVU: Reload Value Update on going
Return values
Thenew state of IWDG_FLAG (SET or RESET).
void IWDG_ReloadCounter ( void  )

Reloads IWDG counter with value defined in the reload register (write access to IWDG_PR and IWDG_RLR registers disabled).

Parameters
None
Return values
None
void IWDG_SetPrescaler ( uint8_t  IWDG_Prescaler)

Sets IWDG Prescaler value.

Parameters
IWDG_Prescaler,:specifies the IWDG Prescaler value. This parameter can be one of the following values:
  • IWDG_Prescaler_4: IWDG prescaler set to 4
  • IWDG_Prescaler_8: IWDG prescaler set to 8
  • IWDG_Prescaler_16: IWDG prescaler set to 16
  • IWDG_Prescaler_32: IWDG prescaler set to 32
  • IWDG_Prescaler_64: IWDG prescaler set to 64
  • IWDG_Prescaler_128: IWDG prescaler set to 128
  • IWDG_Prescaler_256: IWDG prescaler set to 256
Return values
None
void IWDG_SetReload ( uint16_t  Reload)

Sets IWDG Reload value.

Parameters
Reload,:specifies the IWDG Reload value. This parameter must be a number between 0 and 0x0FFF.
Return values
None
void IWDG_WriteAccessCmd ( uint16_t  IWDG_WriteAccess)

Enables or disables write access to IWDG_PR and IWDG_RLR registers.

Parameters
IWDG_WriteAccess,:new state of write access to IWDG_PR and IWDG_RLR registers. This parameter can be one of the following values:
  • IWDG_WriteAccess_Enable: Enable write access to IWDG_PR and IWDG_RLR registers
  • IWDG_WriteAccess_Disable: Disable write access to IWDG_PR and IWDG_RLR registers
Return values
None