LSE

Functions
__STATIC_INLINE void	LL_RCC_LSE_Enable (void)
	Enable Low Speed External (LSE) crystal. BDCR LSEON LL_RCC_LSE_Enable. More...
__STATIC_INLINE void	LL_RCC_LSE_Disable (void)
	Disable Low Speed External (LSE) crystal. BDCR LSEON LL_RCC_LSE_Disable. More...
__STATIC_INLINE void	LL_RCC_LSE_EnableBypass (void)
	Enable external clock source (LSE bypass). BDCR LSEBYP LL_RCC_LSE_EnableBypass. More...
__STATIC_INLINE void	LL_RCC_LSE_DisableBypass (void)
	Disable external clock source (LSE bypass). BDCR LSEBYP LL_RCC_LSE_DisableBypass. More...
__STATIC_INLINE void	LL_RCC_LSE_SetDriveCapability (uint32_t LSEDrive)
	Set LSE oscillator drive capability. More...
__STATIC_INLINE uint32_t	LL_RCC_LSE_GetDriveCapability (void)
	Get LSE oscillator drive capability BDCR LSEDRV LL_RCC_LSE_GetDriveCapability. More...
__STATIC_INLINE void	LL_RCC_LSE_EnableCSS (void)
	Enable Clock security system on LSE. BDCR LSECSSON LL_RCC_LSE_EnableCSS. More...
__STATIC_INLINE void	LL_RCC_LSE_DisableCSS (void)
	Disable Clock security system on LSE. More...
__STATIC_INLINE uint32_t	LL_RCC_LSE_IsReady (void)
	Check if LSE oscillator Ready BDCR LSERDY LL_RCC_LSE_IsReady. More...
__STATIC_INLINE uint32_t	LL_RCC_LSE_IsCSSDetected (void)
	Check if CSS on LSE failure Detection BDCR LSECSSD LL_RCC_LSE_IsCSSDetected. More...
__STATIC_INLINE void	LL_RCC_LSE_DisablePropagation (void)
	Disable LSE oscillator propagation. More...
__STATIC_INLINE void	LL_RCC_LSE_EnablePropagation (void)
	Enable LSE oscillator propagation. More...
__STATIC_INLINE uint32_t	LL_RCC_LSE_IsPropagationEnabled (void)
	Check if LSE oscillator propagation is enabled BDCR LSESYSDIS LL_RCC_LSE_IsPropagationEnabled. More...

Detailed Description

Function Documentation

LL_RCC_LSE_Disable()

__STATIC_INLINE void LL_RCC_LSE_Disable

(

void

)

Disable Low Speed External (LSE) crystal. BDCR LSEON LL_RCC_LSE_Disable.

Return values

None

Definition at line 2278 of file stm32l4xx_ll_rcc.h.

{
  CLEAR_BIT(RCC->BDCR, RCC_BDCR_LSEON);
}

LL_RCC_LSE_DisableBypass()

__STATIC_INLINE void LL_RCC_LSE_DisableBypass

(

void

)

Disable external clock source (LSE bypass). BDCR LSEBYP LL_RCC_LSE_DisableBypass.

Return values

None

Definition at line 2298 of file stm32l4xx_ll_rcc.h.

{
  CLEAR_BIT(RCC->BDCR, RCC_BDCR_LSEBYP);
}

LL_RCC_LSE_DisableCSS()

__STATIC_INLINE void LL_RCC_LSE_DisableCSS

(

void

)

Disable Clock security system on LSE.

Note

Clock security system can be disabled only after a LSE failure detection. In that case it MUST be disabled by software. BDCR LSECSSON LL_RCC_LSE_DisableCSS

Return values

None

Definition at line 2350 of file stm32l4xx_ll_rcc.h.

{
  CLEAR_BIT(RCC->BDCR, RCC_BDCR_LSECSSON);
}

LL_RCC_LSE_DisablePropagation()

__STATIC_INLINE void LL_RCC_LSE_DisablePropagation

(

void

)

Disable LSE oscillator propagation.

Note

LSE clock is not propagated to any peripheral except to RTC which remains clocked

A 2 LSE-clock delay is needed for LSESYSDIS setting to be taken into account BDCR LSESYSDIS LL_RCC_LSE_DisablePropagation

Return values

None

Definition at line 2383 of file stm32l4xx_ll_rcc.h.

{
  SET_BIT(RCC->BDCR, RCC_BDCR_LSESYSDIS);
}

LL_RCC_LSE_Enable()

__STATIC_INLINE void LL_RCC_LSE_Enable

(

void

)

Enable Low Speed External (LSE) crystal. BDCR LSEON LL_RCC_LSE_Enable.

Return values

None

Definition at line 2268 of file stm32l4xx_ll_rcc.h.

{
  SET_BIT(RCC->BDCR, RCC_BDCR_LSEON);
}

LL_RCC_LSE_EnableBypass()

__STATIC_INLINE void LL_RCC_LSE_EnableBypass

(

void

)

Enable external clock source (LSE bypass). BDCR LSEBYP LL_RCC_LSE_EnableBypass.

Return values

None

Definition at line 2288 of file stm32l4xx_ll_rcc.h.

{
  SET_BIT(RCC->BDCR, RCC_BDCR_LSEBYP);
}

LL_RCC_LSE_EnableCSS()

__STATIC_INLINE void LL_RCC_LSE_EnableCSS

(

void

)

Enable Clock security system on LSE. BDCR LSECSSON LL_RCC_LSE_EnableCSS.

Return values

None

Definition at line 2338 of file stm32l4xx_ll_rcc.h.

{
  SET_BIT(RCC->BDCR, RCC_BDCR_LSECSSON);
}

LL_RCC_LSE_EnablePropagation()

__STATIC_INLINE void LL_RCC_LSE_EnablePropagation

(

void

)

Enable LSE oscillator propagation.

Note

A 2 LSE-clock delay is needed for LSESYSDIS resetting to be taken into account BDCR LSESYSDIS LL_RCC_LSE_EnablePropagation

Return values

None

Definition at line 2394 of file stm32l4xx_ll_rcc.h.

{
  CLEAR_BIT(RCC->BDCR, RCC_BDCR_LSESYSDIS);
}

LL_RCC_LSE_GetDriveCapability()

__STATIC_INLINE uint32_t LL_RCC_LSE_GetDriveCapability

(

void

)

Get LSE oscillator drive capability BDCR LSEDRV LL_RCC_LSE_GetDriveCapability.

Return values

Returned

value can be one of the following values: LL_RCC_LSEDRIVE_LOW LL_RCC_LSEDRIVE_MEDIUMLOW LL_RCC_LSEDRIVE_MEDIUMHIGH LL_RCC_LSEDRIVE_HIGH

Definition at line 2328 of file stm32l4xx_ll_rcc.h.

{
  return (uint32_t)(READ_BIT(RCC->BDCR, RCC_BDCR_LSEDRV));
}

LL_RCC_LSE_IsCSSDetected()

__STATIC_INLINE uint32_t LL_RCC_LSE_IsCSSDetected

(

void

)

Check if CSS on LSE failure Detection BDCR LSECSSD LL_RCC_LSE_IsCSSDetected.

Return values

State

of bit (1 or 0).

Definition at line 2370 of file stm32l4xx_ll_rcc.h.

{
  return ((READ_BIT(RCC->BDCR, RCC_BDCR_LSECSSD) == RCC_BDCR_LSECSSD) ? 1UL : 0UL);
}

LL_RCC_LSE_IsPropagationEnabled()

__STATIC_INLINE uint32_t LL_RCC_LSE_IsPropagationEnabled

(

void

)

Check if LSE oscillator propagation is enabled BDCR LSESYSDIS LL_RCC_LSE_IsPropagationEnabled.

Return values

State

of bit (1 or 0).

Definition at line 2404 of file stm32l4xx_ll_rcc.h.

{
  return ((READ_BIT(RCC->BDCR, RCC_BDCR_LSESYSDIS) == 0U) ? 1UL : 0UL);
}

LL_RCC_LSE_IsReady()

__STATIC_INLINE uint32_t LL_RCC_LSE_IsReady

(

void

)

Check if LSE oscillator Ready BDCR LSERDY LL_RCC_LSE_IsReady.

Return values

State

of bit (1 or 0).

Definition at line 2360 of file stm32l4xx_ll_rcc.h.

{
  return ((READ_BIT(RCC->BDCR, RCC_BDCR_LSERDY) == RCC_BDCR_LSERDY) ? 1UL : 0UL);
}

LL_RCC_LSE_SetDriveCapability()

__STATIC_INLINE void LL_RCC_LSE_SetDriveCapability

(

uint32_t

LSEDrive

)

Set LSE oscillator drive capability.

Note

The oscillator is in Xtal mode when it is not in bypass mode. BDCR LSEDRV LL_RCC_LSE_SetDriveCapability

Parameters

LSEDrive

This parameter can be one of the following values: LL_RCC_LSEDRIVE_LOW LL_RCC_LSEDRIVE_MEDIUMLOW LL_RCC_LSEDRIVE_MEDIUMHIGH LL_RCC_LSEDRIVE_HIGH

Return values

None

Definition at line 2314 of file stm32l4xx_ll_rcc.h.

{
  MODIFY_REG(RCC->BDCR, RCC_BDCR_LSEDRV, LSEDrive);
}