Interrupts and flags management functions

Interrupts and flags management functions. More...

Collaboration diagram for Interrupts and flags management functions:

Functions
void	RCC_ITConfig (uint8_t RCC_IT, FunctionalState NewState)
	Enables or disables the specified RCC interrupts.
FlagStatus	RCC_GetFlagStatus (uint8_t RCC_FLAG)
	Checks whether the specified RCC flag is set or not.
void	RCC_ClearFlag (void)
	Clears the RCC reset flags. The reset flags are: RCC_FLAG_PINRST, RCC_FLAG_PORRST, RCC_FLAG_SFTRST, RCC_FLAG_IWDGRST, RCC_FLAG_WWDGRST, RCC_FLAG_LPWRRST.
ITStatus	RCC_GetITStatus (uint8_t RCC_IT)
	Checks whether the specified RCC interrupt has occurred or not.
void	RCC_ClearITPendingBit (uint8_t RCC_IT)
	Clears the RCC's interrupt pending bits.

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Detailed Description

Interrupts and flags management functions.

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                   Interrupts and flags management functions
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Function Documentation

void RCC_ITConfig	(	uint8_t	RCC_IT,
		FunctionalState	NewState
	)

Enables or disables the specified RCC interrupts.

Parameters:

RCC_IT,:	specifies the RCC interrupt sources to be enabled or disabled. This parameter can be any combination of the following values: RCC_IT_LSIRDY: LSI ready interrupt RCC_IT_LSERDY: LSE ready interrupt RCC_IT_HSIRDY: HSI ready interrupt RCC_IT_HSERDY: HSE ready interrupt RCC_IT_PLLRDY: main PLL ready interrupt RCC_IT_PLLI2SRDY: PLLI2S ready interrupt
NewState,:	new state of the specified RCC interrupts. This parameter can be: ENABLE or DISABLE.

Return values:

None

Note:

The CSS interrupt doesn't have an enable bit; once the CSS is enabled and if the HSE clock fails, the CSS interrupt occurs and an NMI is automatically generated. The NMI will be executed indefinitely, and since NMI has higher priority than any other IRQ (and main program) the application will be stacked in the NMI ISR unless the CSS interrupt pending bit is cleared.

Parameters:

RCC_IT,:	specifies the RCC interrupt sources to be enabled or disabled. This parameter can be any combination of the following values: RCC_IT_LSIRDY: LSI ready interrupt RCC_IT_LSERDY: LSE ready interrupt RCC_IT_HSIRDY: HSI ready interrupt RCC_IT_HSERDY: HSE ready interrupt RCC_IT_PLLRDY: PLL ready interrupt RCC_IT_MSIRDY: MSI ready interrupt
NewState,:	new state of the specified RCC interrupts. This parameter can be: ENABLE or DISABLE.

Return values:

None

References __IO, assert_param, CIR_BYTE2_ADDRESS, DISABLE, IS_FUNCTIONAL_STATE, and IS_RCC_IT.

FlagStatus RCC_GetFlagStatus

(

uint8_t

RCC_FLAG

)

Checks whether the specified RCC flag is set or not.

Parameters:

RCC_FLAG,:

specifies the flag to check. This parameter can be one of the following values: RCC_FLAG_HSIRDY: HSI oscillator clock ready RCC_FLAG_HSERDY: HSE oscillator clock ready RCC_FLAG_PLLRDY: main PLL clock ready RCC_FLAG_PLLI2SRDY: PLLI2S clock ready RCC_FLAG_LSERDY: LSE oscillator clock ready RCC_FLAG_LSIRDY: LSI oscillator clock ready RCC_FLAG_BORRST: POR/PDR or BOR reset RCC_FLAG_PINRST: Pin reset RCC_FLAG_PORRST: POR/PDR reset RCC_FLAG_SFTRST: Software reset RCC_FLAG_IWDGRST: Independent Watchdog reset RCC_FLAG_WWDGRST: Window Watchdog reset RCC_FLAG_LPWRRST: Low Power reset

Return values:

The	new state of RCC_FLAG (SET or RESET).

Parameters:

RCC_FLAG,:

specifies the flag to check. This parameter can be one of the following values: RCC_FLAG_HSIRDY: HSI oscillator clock ready RCC_FLAG_MSIRDY: MSI oscillator clock ready RCC_FLAG_HSERDY: HSE oscillator clock ready RCC_FLAG_PLLRDY: PLL clock ready RCC_FLAG_LSERDY: LSE oscillator clock ready RCC_FLAG_LSIRDY: LSI oscillator clock ready RCC_FLAG_OBLRST: Option Byte Loader (OBL) reset RCC_FLAG_PINRST: Pin reset RCC_FLAG_PORRST: POR/PDR reset RCC_FLAG_SFTRST: Software reset RCC_FLAG_IWDGRST: Independent Watchdog reset RCC_FLAG_WWDGRST: Window Watchdog reset RCC_FLAG_LPWRRST: Low Power reset

Return values:

The	new state of RCC_FLAG (SET or RESET).

References assert_param, FLAG_MASK, FLAG_Mask, IS_RCC_FLAG, RCC, RESET, and SET.

Referenced by RCC_WaitForHSEStartUp().

void RCC_ClearFlag

(

void

)

Clears the RCC reset flags. The reset flags are: RCC_FLAG_PINRST, RCC_FLAG_PORRST, RCC_FLAG_SFTRST, RCC_FLAG_IWDGRST, RCC_FLAG_WWDGRST, RCC_FLAG_LPWRRST.

Clears the RCC reset flags.

Clears the RCC reset flags. The reset flags are: RCC_FLAG_OBLRST, RCC_FLAG_PINRST, RCC_FLAG_PORRST, RCC_FLAG_SFTRST, RCC_FLAG_IWDGRST, RCC_FLAG_WWDGRST, RCC_FLAG_LPWRRST.

Parameters:

None

Return values:

None

References CSR_RMVF_Set, RCC, and RCC_CSR_RMVF.

ITStatus RCC_GetITStatus

(

uint8_t

RCC_IT

)

Checks whether the specified RCC interrupt has occurred or not.

Parameters:

RCC_IT,:

specifies the RCC interrupt source to check. This parameter can be one of the following values: RCC_IT_LSIRDY: LSI ready interrupt RCC_IT_LSERDY: LSE ready interrupt RCC_IT_HSIRDY: HSI ready interrupt RCC_IT_HSERDY: HSE ready interrupt RCC_IT_PLLRDY: main PLL ready interrupt RCC_IT_PLLI2SRDY: PLLI2S ready interrupt RCC_IT_CSS: Clock Security System interrupt

Return values:

The	new state of RCC_IT (SET or RESET).

Parameters:

RCC_IT,:

specifies the RCC interrupt source to check. This parameter can be one of the following values: RCC_IT_LSIRDY: LSI ready interrupt RCC_IT_LSERDY: LSE ready interrupt RCC_IT_HSIRDY: HSI ready interrupt RCC_IT_HSERDY: HSE ready interrupt RCC_IT_PLLRDY: PLL ready interrupt RCC_IT_MSIRDY: MSI ready interrupt RCC_IT_CSS: Clock Security System interrupt

Return values:

The	new state of RCC_IT (SET or RESET).

References assert_param, IS_RCC_GET_IT, RCC, RESET, and SET.

void RCC_ClearITPendingBit

(

uint8_t

RCC_IT

)

Clears the RCC's interrupt pending bits.

Clears the RCC’s interrupt pending bits.

Parameters:

RCC_IT,:

specifies the interrupt pending bit to clear. This parameter can be any combination of the following values: RCC_IT_LSIRDY: LSI ready interrupt RCC_IT_LSERDY: LSE ready interrupt RCC_IT_HSIRDY: HSI ready interrupt RCC_IT_HSERDY: HSE ready interrupt RCC_IT_PLLRDY: main PLL ready interrupt RCC_IT_PLLI2SRDY: PLLI2S ready interrupt RCC_IT_CSS: Clock Security System interrupt

Return values:

None

Parameters:

RCC_IT,:

specifies the interrupt pending bit to clear. This parameter can be any combination of the following values: RCC_IT_LSIRDY: LSI ready interrupt RCC_IT_LSERDY: LSE ready interrupt RCC_IT_HSIRDY: HSI ready interrupt RCC_IT_HSERDY: HSE ready interrupt RCC_IT_PLLRDY: PLL ready interrupt RCC_IT_MSIRDY: MSI ready interrupt RCC_IT_CSS: Clock Security System interrupt

Return values:

None

References __IO, assert_param, CIR_BYTE3_ADDRESS, and IS_RCC_CLEAR_IT.