Functions
__STATIC_INLINE void	LL_I2C_Enable (I2C_TypeDef *I2Cx)
	Enable I2C peripheral (PE = 1).
__STATIC_INLINE void	LL_I2C_Disable (I2C_TypeDef *I2Cx)
	Disable I2C peripheral (PE = 0).
__STATIC_INLINE uint32_t	LL_I2C_IsEnabled (I2C_TypeDef *I2Cx)
	Check if the I2C peripheral is enabled or disabled.
__STATIC_INLINE void	LL_I2C_ConfigFilters (I2C_TypeDef *I2Cx, uint32_t AnalogFilter, uint32_t DigitalFilter)
	Configure Noise Filters (Analog and Digital).
__STATIC_INLINE void	LL_I2C_SetDigitalFilter (I2C_TypeDef *I2Cx, uint32_t DigitalFilter)
	Configure Digital Noise Filter.
__STATIC_INLINE uint32_t	LL_I2C_GetDigitalFilter (I2C_TypeDef *I2Cx)
	Get the current Digital Noise Filter configuration.
__STATIC_INLINE void	LL_I2C_EnableAnalogFilter (I2C_TypeDef *I2Cx)
	Enable Analog Noise Filter.
__STATIC_INLINE void	LL_I2C_DisableAnalogFilter (I2C_TypeDef *I2Cx)
	Disable Analog Noise Filter.
__STATIC_INLINE uint32_t	LL_I2C_IsEnabledAnalogFilter (I2C_TypeDef *I2Cx)
	Check if Analog Noise Filter is enabled or disabled.
__STATIC_INLINE void	LL_I2C_EnableDMAReq_TX (I2C_TypeDef *I2Cx)
	Enable DMA transmission requests.
__STATIC_INLINE void	LL_I2C_DisableDMAReq_TX (I2C_TypeDef *I2Cx)
	Disable DMA transmission requests.
__STATIC_INLINE uint32_t	LL_I2C_IsEnabledDMAReq_TX (I2C_TypeDef *I2Cx)
	Check if DMA transmission requests are enabled or disabled.
__STATIC_INLINE void	LL_I2C_EnableDMAReq_RX (I2C_TypeDef *I2Cx)
	Enable DMA reception requests.
__STATIC_INLINE void	LL_I2C_DisableDMAReq_RX (I2C_TypeDef *I2Cx)
	Disable DMA reception requests.
__STATIC_INLINE uint32_t	LL_I2C_IsEnabledDMAReq_RX (I2C_TypeDef *I2Cx)
	Check if DMA reception requests are enabled or disabled.
__STATIC_INLINE uint32_t	LL_I2C_DMA_GetRegAddr (I2C_TypeDef *I2Cx, uint32_t Direction)
	Get the data register address used for DMA transfer.
__STATIC_INLINE void	LL_I2C_EnableClockStretching (I2C_TypeDef *I2Cx)
	Enable Clock stretching.
__STATIC_INLINE void	LL_I2C_DisableClockStretching (I2C_TypeDef *I2Cx)
	Disable Clock stretching.
__STATIC_INLINE uint32_t	LL_I2C_IsEnabledClockStretching (I2C_TypeDef *I2Cx)
	Check if Clock stretching is enabled or disabled.
__STATIC_INLINE void	LL_I2C_EnableSlaveByteControl (I2C_TypeDef *I2Cx)
	Enable hardware byte control in slave mode.
__STATIC_INLINE void	LL_I2C_DisableSlaveByteControl (I2C_TypeDef *I2Cx)
	Disable hardware byte control in slave mode.
__STATIC_INLINE uint32_t	LL_I2C_IsEnabledSlaveByteControl (I2C_TypeDef *I2Cx)
	Check if hardware byte control in slave mode is enabled or disabled.
__STATIC_INLINE void	LL_I2C_EnableWakeUpFromStop (I2C_TypeDef *I2Cx)
	Enable Wakeup from STOP.
__STATIC_INLINE void	LL_I2C_DisableWakeUpFromStop (I2C_TypeDef *I2Cx)
	Disable Wakeup from STOP.
__STATIC_INLINE uint32_t	LL_I2C_IsEnabledWakeUpFromStop (I2C_TypeDef *I2Cx)
	Check if Wakeup from STOP is enabled or disabled.
__STATIC_INLINE void	LL_I2C_EnableGeneralCall (I2C_TypeDef *I2Cx)
	Enable General Call.
__STATIC_INLINE void	LL_I2C_DisableGeneralCall (I2C_TypeDef *I2Cx)
	Disable General Call.
__STATIC_INLINE uint32_t	LL_I2C_IsEnabledGeneralCall (I2C_TypeDef *I2Cx)
	Check if General Call is enabled or disabled.
__STATIC_INLINE void	LL_I2C_SetMasterAddressingMode (I2C_TypeDef *I2Cx, uint32_t AddressingMode)
	Configure the Master to operate in 7-bit or 10-bit addressing mode.
__STATIC_INLINE uint32_t	LL_I2C_GetMasterAddressingMode (I2C_TypeDef *I2Cx)
	Get the Master addressing mode.
__STATIC_INLINE void	LL_I2C_SetOwnAddress1 (I2C_TypeDef *I2Cx, uint32_t OwnAddress1, uint32_t OwnAddrSize)
	Set the Own Address1.
__STATIC_INLINE void	LL_I2C_EnableOwnAddress1 (I2C_TypeDef *I2Cx)
	Enable acknowledge on Own Address1 match address.
__STATIC_INLINE void	LL_I2C_DisableOwnAddress1 (I2C_TypeDef *I2Cx)
	Disable acknowledge on Own Address1 match address.
__STATIC_INLINE uint32_t	LL_I2C_IsEnabledOwnAddress1 (I2C_TypeDef *I2Cx)
	Check if Own Address1 acknowledge is enabled or disabled.
__STATIC_INLINE void	LL_I2C_SetOwnAddress2 (I2C_TypeDef *I2Cx, uint32_t OwnAddress2, uint32_t OwnAddrMask)
	Set the 7bits Own Address2.
__STATIC_INLINE void	LL_I2C_EnableOwnAddress2 (I2C_TypeDef *I2Cx)
	Enable acknowledge on Own Address2 match address.
__STATIC_INLINE void	LL_I2C_DisableOwnAddress2 (I2C_TypeDef *I2Cx)
	Disable acknowledge on Own Address2 match address.
__STATIC_INLINE uint32_t	LL_I2C_IsEnabledOwnAddress2 (I2C_TypeDef *I2Cx)
	Check if Own Address1 acknowledge is enabled or disabled.
__STATIC_INLINE void	LL_I2C_SetTiming (I2C_TypeDef *I2Cx, uint32_t Timing)
	Configure the SDA setup, hold time and the SCL high, low period.
__STATIC_INLINE uint32_t	LL_I2C_GetTimingPrescaler (I2C_TypeDef *I2Cx)
	Get the Timing Prescaler setting.
__STATIC_INLINE uint32_t	LL_I2C_GetClockLowPeriod (I2C_TypeDef *I2Cx)
	Get the SCL low period setting.
__STATIC_INLINE uint32_t	LL_I2C_GetClockHighPeriod (I2C_TypeDef *I2Cx)
	Get the SCL high period setting.
__STATIC_INLINE uint32_t	LL_I2C_GetDataHoldTime (I2C_TypeDef *I2Cx)
	Get the SDA hold time.
__STATIC_INLINE uint32_t	LL_I2C_GetDataSetupTime (I2C_TypeDef *I2Cx)
	Get the SDA setup time.
__STATIC_INLINE void	LL_I2C_SetMode (I2C_TypeDef *I2Cx, uint32_t PeripheralMode)
	Configure peripheral mode.
__STATIC_INLINE uint32_t	LL_I2C_GetMode (I2C_TypeDef *I2Cx)
	Get peripheral mode.
__STATIC_INLINE void	LL_I2C_EnableSMBusAlert (I2C_TypeDef *I2Cx)
	Enable SMBus alert (Host or Device mode)
__STATIC_INLINE void	LL_I2C_DisableSMBusAlert (I2C_TypeDef *I2Cx)
	Disable SMBus alert (Host or Device mode)
__STATIC_INLINE uint32_t	LL_I2C_IsEnabledSMBusAlert (I2C_TypeDef *I2Cx)
	Check if SMBus alert (Host or Device mode) is enabled or disabled.
__STATIC_INLINE void	LL_I2C_EnableSMBusPEC (I2C_TypeDef *I2Cx)
	Enable SMBus Packet Error Calculation (PEC).
__STATIC_INLINE void	LL_I2C_DisableSMBusPEC (I2C_TypeDef *I2Cx)
	Disable SMBus Packet Error Calculation (PEC).
__STATIC_INLINE uint32_t	LL_I2C_IsEnabledSMBusPEC (I2C_TypeDef *I2Cx)
	Check if SMBus Packet Error Calculation (PEC) is enabled or disabled.
__STATIC_INLINE void	LL_I2C_ConfigSMBusTimeout (I2C_TypeDef *I2Cx, uint32_t TimeoutA, uint32_t TimeoutAMode, uint32_t TimeoutB)
	Configure the SMBus Clock Timeout.
__STATIC_INLINE void	LL_I2C_SetSMBusTimeoutA (I2C_TypeDef *I2Cx, uint32_t TimeoutA)
	Configure the SMBus Clock TimeoutA (SCL low timeout or SCL and SDA high timeout depends on TimeoutA mode).
__STATIC_INLINE uint32_t	LL_I2C_GetSMBusTimeoutA (I2C_TypeDef *I2Cx)
	Get the SMBus Clock TimeoutA setting.
__STATIC_INLINE void	LL_I2C_SetSMBusTimeoutAMode (I2C_TypeDef *I2Cx, uint32_t TimeoutAMode)
	Set the SMBus Clock TimeoutA mode.
__STATIC_INLINE uint32_t	LL_I2C_GetSMBusTimeoutAMode (I2C_TypeDef *I2Cx)
	Get the SMBus Clock TimeoutA mode.
__STATIC_INLINE void	LL_I2C_SetSMBusTimeoutB (I2C_TypeDef *I2Cx, uint32_t TimeoutB)
	Configure the SMBus Extended Cumulative Clock TimeoutB (Master or Slave mode).
__STATIC_INLINE uint32_t	LL_I2C_GetSMBusTimeoutB (I2C_TypeDef *I2Cx)
	Get the SMBus Extended Cumulative Clock TimeoutB setting.
__STATIC_INLINE void	LL_I2C_EnableSMBusTimeout (I2C_TypeDef *I2Cx, uint32_t ClockTimeout)
	Enable the SMBus Clock Timeout.
__STATIC_INLINE void	LL_I2C_DisableSMBusTimeout (I2C_TypeDef *I2Cx, uint32_t ClockTimeout)
	Disable the SMBus Clock Timeout.
__STATIC_INLINE uint32_t	LL_I2C_IsEnabledSMBusTimeout (I2C_TypeDef *I2Cx, uint32_t ClockTimeout)
	Check if the SMBus Clock Timeout is enabled or disabled.

Function Documentation

__STATIC_INLINE void LL_I2C_ConfigFilters	(	I2C_TypeDef *	I2Cx,
		uint32_t	AnalogFilter,
		uint32_t	DigitalFilter
	)

Configure Noise Filters (Analog and Digital).

Note:: If the analog filter is also enabled, the digital filter is added to analog filter. The filters can only be programmed when the I2C is disabled (PE = 0).

Reference Manual to LL API cross reference:: CR1 ANFOFF LL_I2C_ConfigFilters
CR1 DNF LL_I2C_ConfigFilters

Parameters:

I2Cx	I2C Instance.
AnalogFilter	This parameter can be one of the following values: LL_I2C_ANALOGFILTER_ENABLE LL_I2C_ANALOGFILTER_DISABLE
DigitalFilter	This parameter must be a value between Min_Data=0x00 (Digital filter disabled) and Max_Data=0x0F (Digital filter enabled and filtering capability up to 15ti2cclk). This parameter is used to configure the digital noise filter on SDA and SCL input. The digital filter will filter spikes with a length of up to DNF[3:0]ti2cclk.

Return values:

None

Definition at line 475 of file stm32l4xx_ll_i2c.h.

Referenced by LL_I2C_Init().

__STATIC_INLINE void LL_I2C_ConfigSMBusTimeout	(	I2C_TypeDef *	I2Cx,
		uint32_t	TimeoutA,
		uint32_t	TimeoutAMode,
		uint32_t	TimeoutB
	)

Configure the SMBus Clock Timeout.

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.; This configuration can only be programmed when associated Timeout is disabled (TimeoutA and/orTimeoutB).

Reference Manual to LL API cross reference:: TIMEOUTR TIMEOUTA LL_I2C_ConfigSMBusTimeout
TIMEOUTR TIDLE LL_I2C_ConfigSMBusTimeout
TIMEOUTR TIMEOUTB LL_I2C_ConfigSMBusTimeout

Parameters:

I2Cx	I2C Instance.
TimeoutA	This parameter must be a value between Min_Data=0 and Max_Data=0xFFF.
TimeoutAMode	This parameter can be one of the following values: LL_I2C_SMBUS_TIMEOUTA_MODE_SCL_LOW LL_I2C_SMBUS_TIMEOUTA_MODE_SDA_SCL_HIGH
TimeoutB

Return values:

None

Definition at line 1123 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_Disable ( I2C_TypeDef * I2Cx )

Disable I2C peripheral (PE = 0).

Note:: When PE = 0, the I2C SCL and SDA lines are released. Internal state machines and status bits are put back to their reset value. When cleared, PE must be kept low for at least 3 APB clock cycles.

Reference Manual to LL API cross reference:: CR1 PE LL_I2C_Disable

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 443 of file stm32l4xx_ll_i2c.h.

Referenced by LL_I2C_Init().

__STATIC_INLINE void LL_I2C_DisableAnalogFilter ( I2C_TypeDef * I2Cx )

Disable Analog Noise Filter.

Note:: This filter can only be programmed when the I2C is disabled (PE = 0).

Reference Manual to LL API cross reference:: CR1 ANFOFF LL_I2C_DisableAnalogFilter

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 527 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_DisableClockStretching ( I2C_TypeDef * I2Cx )

Disable Clock stretching.

Note:: This bit can only be programmed when the I2C is disabled (PE = 0).

Reference Manual to LL API cross reference:: CR1 NOSTRETCH LL_I2C_DisableClockStretching

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 656 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_DisableDMAReq_RX ( I2C_TypeDef * I2Cx )

Disable DMA reception requests.

Reference Manual to LL API cross reference:: CR1 RXDMAEN LL_I2C_DisableDMAReq_RX

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 593 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_DisableDMAReq_TX ( I2C_TypeDef * I2Cx )

Disable DMA transmission requests.

Reference Manual to LL API cross reference:: CR1 TXDMAEN LL_I2C_DisableDMAReq_TX

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 560 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_DisableGeneralCall ( I2C_TypeDef * I2Cx )

Disable General Call.

Note:: When disabled the Address 0x00 is NACKed.

Reference Manual to LL API cross reference:: CR1 GCEN LL_I2C_DisableGeneralCall

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 764 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_DisableOwnAddress1 ( I2C_TypeDef * I2Cx )

Disable acknowledge on Own Address1 match address.

Reference Manual to LL API cross reference:: OAR1 OA1EN LL_I2C_DisableOwnAddress1

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 841 of file stm32l4xx_ll_i2c.h.

Referenced by LL_I2C_Init().

__STATIC_INLINE void LL_I2C_DisableOwnAddress2 ( I2C_TypeDef * I2Cx )

Disable acknowledge on Own Address2 match address.

Reference Manual to LL API cross reference:: OAR2 OA2EN LL_I2C_DisableOwnAddress2

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 897 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_DisableSlaveByteControl ( I2C_TypeDef * I2Cx )

Disable hardware byte control in slave mode.

Reference Manual to LL API cross reference:: CR1 SBC LL_I2C_DisableSlaveByteControl

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 689 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_DisableSMBusAlert ( I2C_TypeDef * I2Cx )

Disable SMBus alert (Host or Device mode)

Note:

The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.

SMBus Device mode:

SMBus Alert pin is not drived (can be used as a standard GPIO) and Alert Response Address Header acknowledge is disabled. SMBus Host mode:
SMBus Alert pin management is not supported.

Reference Manual to LL API cross reference:: CR1 ALERTEN LL_I2C_DisableSMBusAlert

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 1050 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_DisableSMBusPEC ( I2C_TypeDef * I2Cx )

Disable SMBus Packet Error Calculation (PEC).

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.

Reference Manual to LL API cross reference:: CR1 PECEN LL_I2C_DisableSMBusPEC

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 1089 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_DisableSMBusTimeout	(	I2C_TypeDef *	I2Cx,
		uint32_t	ClockTimeout
	)

Disable the SMBus Clock Timeout.

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.

Reference Manual to LL API cross reference:: TIMEOUTR TIMOUTEN LL_I2C_DisableSMBusTimeout
TIMEOUTR TEXTEN LL_I2C_DisableSMBusTimeout

Parameters:

I2Cx	I2C Instance.
ClockTimeout	This parameter can be one of the following values: LL_I2C_SMBUS_TIMEOUTA LL_I2C_SMBUS_TIMEOUTB LL_I2C_SMBUS_ALL_TIMEOUT

Return values:

None

Definition at line 1249 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_DisableWakeUpFromStop ( I2C_TypeDef * I2Cx )

Disable Wakeup from STOP.

Note:: The macro IS_I2C_WAKEUP_FROMSTOP_INSTANCE(I2Cx) can be used to check whether or not WakeUpFromStop feature is supported by the I2Cx Instance.

Reference Manual to LL API cross reference:: CR1 WUPEN LL_I2C_DisableWakeUpFromStop

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 727 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_DMA_GetRegAddr	(	I2C_TypeDef *	I2Cx,
		uint32_t	Direction
	)

Get the data register address used for DMA transfer.

Reference Manual to LL API cross reference:: TXDR TXDATA LL_I2C_DMA_GetRegAddr
RXDR RXDATA LL_I2C_DMA_GetRegAddr

Parameters:

I2Cx	I2C Instance
Direction	This parameter can be one of the following values: LL_I2C_DMA_REG_DATA_TRANSMIT LL_I2C_DMA_REG_DATA_RECEIVE

Return values:

Address of data register

Definition at line 619 of file stm32l4xx_ll_i2c.h.

References LL_I2C_DMA_REG_DATA_TRANSMIT.

__STATIC_INLINE void LL_I2C_Enable ( I2C_TypeDef * I2Cx )

Enable I2C peripheral (PE = 1).

Reference Manual to LL API cross reference:: CR1 PE LL_I2C_Enable

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 429 of file stm32l4xx_ll_i2c.h.

Referenced by LL_I2C_Init().

__STATIC_INLINE void LL_I2C_EnableAnalogFilter ( I2C_TypeDef * I2Cx )

Enable Analog Noise Filter.

Note:: This filter can only be programmed when the I2C is disabled (PE = 0).

Reference Manual to LL API cross reference:: CR1 ANFOFF LL_I2C_EnableAnalogFilter

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 515 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_EnableClockStretching ( I2C_TypeDef * I2Cx )

Enable Clock stretching.

Note:: This bit can only be programmed when the I2C is disabled (PE = 0).

Reference Manual to LL API cross reference:: CR1 NOSTRETCH LL_I2C_EnableClockStretching

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 644 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_EnableDMAReq_RX ( I2C_TypeDef * I2Cx )

Enable DMA reception requests.

Reference Manual to LL API cross reference:: CR1 RXDMAEN LL_I2C_EnableDMAReq_RX

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 582 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_EnableDMAReq_TX ( I2C_TypeDef * I2Cx )

Enable DMA transmission requests.

Reference Manual to LL API cross reference:: CR1 TXDMAEN LL_I2C_EnableDMAReq_TX

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 549 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_EnableGeneralCall ( I2C_TypeDef * I2Cx )

Enable General Call.

Note:: When enabled the Address 0x00 is ACKed.

Reference Manual to LL API cross reference:: CR1 GCEN LL_I2C_EnableGeneralCall

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 752 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_EnableOwnAddress1 ( I2C_TypeDef * I2Cx )

Enable acknowledge on Own Address1 match address.

Reference Manual to LL API cross reference:: OAR1 OA1EN LL_I2C_EnableOwnAddress1

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 830 of file stm32l4xx_ll_i2c.h.

Referenced by LL_I2C_Init().

__STATIC_INLINE void LL_I2C_EnableOwnAddress2 ( I2C_TypeDef * I2Cx )

Enable acknowledge on Own Address2 match address.

Reference Manual to LL API cross reference:: OAR2 OA2EN LL_I2C_EnableOwnAddress2

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 886 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_EnableSlaveByteControl ( I2C_TypeDef * I2Cx )

Enable hardware byte control in slave mode.

Reference Manual to LL API cross reference:: CR1 SBC LL_I2C_EnableSlaveByteControl

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 678 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_EnableSMBusAlert ( I2C_TypeDef * I2Cx )

Enable SMBus alert (Host or Device mode)

Note:

The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.

SMBus Device mode:

SMBus Alert pin is drived low and Alert Response Address Header acknowledge is enabled. SMBus Host mode:
SMBus Alert pin management is supported.

Reference Manual to LL API cross reference:: CR1 ALERTEN LL_I2C_EnableSMBusAlert

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 1032 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_EnableSMBusPEC ( I2C_TypeDef * I2Cx )

Enable SMBus Packet Error Calculation (PEC).

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.

Reference Manual to LL API cross reference:: CR1 PECEN LL_I2C_EnableSMBusPEC

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 1076 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_EnableSMBusTimeout	(	I2C_TypeDef *	I2Cx,
		uint32_t	ClockTimeout
	)

Enable the SMBus Clock Timeout.

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.

Reference Manual to LL API cross reference:: TIMEOUTR TIMOUTEN LL_I2C_EnableSMBusTimeout
TIMEOUTR TEXTEN LL_I2C_EnableSMBusTimeout

Parameters:

I2Cx	I2C Instance.
ClockTimeout	This parameter can be one of the following values: LL_I2C_SMBUS_TIMEOUTA LL_I2C_SMBUS_TIMEOUTB LL_I2C_SMBUS_ALL_TIMEOUT

Return values:

None

Definition at line 1231 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_EnableWakeUpFromStop ( I2C_TypeDef * I2Cx )

Enable Wakeup from STOP.

Note:: The macro IS_I2C_WAKEUP_FROMSTOP_INSTANCE(I2Cx) can be used to check whether or not WakeUpFromStop feature is supported by the I2Cx Instance.; This bit can only be programmed when Digital Filter is disabled.

Reference Manual to LL API cross reference:: CR1 WUPEN LL_I2C_EnableWakeUpFromStop

Parameters:

I2Cx	I2C Instance.

Return values:

None

Definition at line 714 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_GetClockHighPeriod ( I2C_TypeDef * I2Cx )

Get the SCL high period setting.

Reference Manual to LL API cross reference:: TIMINGR SCLH LL_I2C_GetClockHighPeriod

Parameters:

I2Cx	I2C Instance.

Return values:

Value between Min_Data=0x00 and Max_Data=0xFF

Definition at line 955 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_GetClockLowPeriod ( I2C_TypeDef * I2Cx )

Get the SCL low period setting.

Reference Manual to LL API cross reference:: TIMINGR SCLL LL_I2C_GetClockLowPeriod

Parameters:

I2Cx	I2C Instance.

Return values:

Value between Min_Data=0x00 and Max_Data=0xFF

Definition at line 944 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_GetDataHoldTime ( I2C_TypeDef * I2Cx )

Get the SDA hold time.

Reference Manual to LL API cross reference:: TIMINGR SDADEL LL_I2C_GetDataHoldTime

Parameters:

I2Cx	I2C Instance.

Return values:

Value between Min_Data=0x0 and Max_Data=0xF

Definition at line 966 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_GetDataSetupTime ( I2C_TypeDef * I2Cx )

Get the SDA setup time.

Reference Manual to LL API cross reference:: TIMINGR SCLDEL LL_I2C_GetDataSetupTime

Parameters:

I2Cx	I2C Instance.

Return values:

Value between Min_Data=0x0 and Max_Data=0xF

Definition at line 977 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_GetDigitalFilter ( I2C_TypeDef * I2Cx )

Get the current Digital Noise Filter configuration.

Reference Manual to LL API cross reference:: CR1 DNF LL_I2C_GetDigitalFilter

Parameters:

I2Cx	I2C Instance.

Return values:

Value between Min_Data=0x0 and Max_Data=0xF

Definition at line 503 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_GetMasterAddressingMode ( I2C_TypeDef * I2Cx )

Get the Master addressing mode.

Reference Manual to LL API cross reference:: CR2 ADD10 LL_I2C_GetMasterAddressingMode

Parameters:

I2Cx	I2C Instance.

Return values:

Returned

value can be one of the following values:

Definition at line 803 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_GetMode ( I2C_TypeDef * I2Cx )

Get peripheral mode.

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.

Reference Manual to LL API cross reference:: CR1 SMBHEN LL_I2C_GetMode
CR1 SMBDEN LL_I2C_GetMode

Parameters:

I2Cx	I2C Instance.

Return values:

Returned

value can be one of the following values:

Definition at line 1014 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_GetSMBusTimeoutA ( I2C_TypeDef * I2Cx )

Get the SMBus Clock TimeoutA setting.

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.

Reference Manual to LL API cross reference:: TIMEOUTR TIMEOUTA LL_I2C_GetSMBusTimeoutA

Parameters:

I2Cx	I2C Instance.

Return values:

Value between Min_Data=0 and Max_Data=0xFFF

Definition at line 1153 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_GetSMBusTimeoutAMode ( I2C_TypeDef * I2Cx )

Get the SMBus Clock TimeoutA mode.

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.

Reference Manual to LL API cross reference:: TIMEOUTR TIDLE LL_I2C_GetSMBusTimeoutAMode

Parameters:

I2Cx	I2C Instance.

Return values:

Returned

value can be one of the following values:

Definition at line 1185 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_GetSMBusTimeoutB ( I2C_TypeDef * I2Cx )

Get the SMBus Extended Cumulative Clock TimeoutB setting.

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.

Reference Manual to LL API cross reference:: TIMEOUTR TIMEOUTB LL_I2C_GetSMBusTimeoutB

Parameters:

I2Cx	I2C Instance.

Return values:

Value between Min_Data=0 and Max_Data=0xFFF

Definition at line 1213 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_GetTimingPrescaler ( I2C_TypeDef * I2Cx )

Get the Timing Prescaler setting.

Reference Manual to LL API cross reference:: TIMINGR PRESC LL_I2C_GetTimingPrescaler

Parameters:

I2Cx	I2C Instance.

Return values:

Value between Min_Data=0x0 and Max_Data=0xF

Definition at line 933 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_IsEnabled ( I2C_TypeDef * I2Cx )

Check if the I2C peripheral is enabled or disabled.

Reference Manual to LL API cross reference:: CR1 PE LL_I2C_IsEnabled

Parameters:

I2Cx	I2C Instance.

Return values:

State of bit (1 or 0).

Definition at line 454 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_IsEnabledAnalogFilter ( I2C_TypeDef * I2Cx )

Check if Analog Noise Filter is enabled or disabled.

Reference Manual to LL API cross reference:: CR1 ANFOFF LL_I2C_IsEnabledAnalogFilter

Parameters:

I2Cx	I2C Instance.

Return values:

State of bit (1 or 0).

Definition at line 538 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_IsEnabledClockStretching ( I2C_TypeDef * I2Cx )

Check if Clock stretching is enabled or disabled.

Reference Manual to LL API cross reference:: CR1 NOSTRETCH LL_I2C_IsEnabledClockStretching

Parameters:

I2Cx	I2C Instance.

Return values:

State of bit (1 or 0).

Definition at line 667 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_IsEnabledDMAReq_RX ( I2C_TypeDef * I2Cx )

Check if DMA reception requests are enabled or disabled.

Reference Manual to LL API cross reference:: CR1 RXDMAEN LL_I2C_IsEnabledDMAReq_RX

Parameters:

I2Cx	I2C Instance.

Return values:

State of bit (1 or 0).

Definition at line 604 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_IsEnabledDMAReq_TX ( I2C_TypeDef * I2Cx )

Check if DMA transmission requests are enabled or disabled.

Reference Manual to LL API cross reference:: CR1 TXDMAEN LL_I2C_IsEnabledDMAReq_TX

Parameters:

I2Cx	I2C Instance.

Return values:

State of bit (1 or 0).

Definition at line 571 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_IsEnabledGeneralCall ( I2C_TypeDef * I2Cx )

Check if General Call is enabled or disabled.

Reference Manual to LL API cross reference:: CR1 GCEN LL_I2C_IsEnabledGeneralCall

Parameters:

I2Cx	I2C Instance.

Return values:

State of bit (1 or 0).

Definition at line 775 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_IsEnabledOwnAddress1 ( I2C_TypeDef * I2Cx )

Check if Own Address1 acknowledge is enabled or disabled.

Reference Manual to LL API cross reference:: OAR1 OA1EN LL_I2C_IsEnabledOwnAddress1

Parameters:

I2Cx	I2C Instance.

Return values:

State of bit (1 or 0).

Definition at line 852 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_IsEnabledOwnAddress2 ( I2C_TypeDef * I2Cx )

Check if Own Address1 acknowledge is enabled or disabled.

Reference Manual to LL API cross reference:: OAR2 OA2EN LL_I2C_IsEnabledOwnAddress2

Parameters:

I2Cx	I2C Instance.

Return values:

State of bit (1 or 0).

Definition at line 908 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_IsEnabledSlaveByteControl ( I2C_TypeDef * I2Cx )

Check if hardware byte control in slave mode is enabled or disabled.

Reference Manual to LL API cross reference:: CR1 SBC LL_I2C_IsEnabledSlaveByteControl

Parameters:

I2Cx	I2C Instance.

Return values:

State of bit (1 or 0).

Definition at line 700 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_IsEnabledSMBusAlert ( I2C_TypeDef * I2Cx )

Check if SMBus alert (Host or Device mode) is enabled or disabled.

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.

Reference Manual to LL API cross reference:: CR1 ALERTEN LL_I2C_IsEnabledSMBusAlert

Parameters:

I2Cx	I2C Instance.

Return values:

State of bit (1 or 0).

Definition at line 1063 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_IsEnabledSMBusPEC ( I2C_TypeDef * I2Cx )

Check if SMBus Packet Error Calculation (PEC) is enabled or disabled.

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.

Reference Manual to LL API cross reference:: CR1 PECEN LL_I2C_IsEnabledSMBusPEC

Parameters:

I2Cx	I2C Instance.

Return values:

State of bit (1 or 0).

Definition at line 1102 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_IsEnabledSMBusTimeout	(	I2C_TypeDef *	I2Cx,
		uint32_t	ClockTimeout
	)

Check if the SMBus Clock Timeout is enabled or disabled.

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.

Reference Manual to LL API cross reference:: TIMEOUTR TIMOUTEN LL_I2C_IsEnabledSMBusTimeout
TIMEOUTR TEXTEN LL_I2C_IsEnabledSMBusTimeout

Parameters:

I2Cx	I2C Instance.
ClockTimeout	This parameter can be one of the following values: LL_I2C_SMBUS_TIMEOUTA LL_I2C_SMBUS_TIMEOUTB LL_I2C_SMBUS_ALL_TIMEOUT

Return values:

State of bit (1 or 0).

Definition at line 1267 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE uint32_t LL_I2C_IsEnabledWakeUpFromStop ( I2C_TypeDef * I2Cx )

Check if Wakeup from STOP is enabled or disabled.

Note:: The macro IS_I2C_WAKEUP_FROMSTOP_INSTANCE(I2Cx) can be used to check whether or not WakeUpFromStop feature is supported by the I2Cx Instance.

Reference Manual to LL API cross reference:: CR1 WUPEN LL_I2C_IsEnabledWakeUpFromStop

Parameters:

I2Cx	I2C Instance.

Return values:

State of bit (1 or 0).

Definition at line 740 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_SetDigitalFilter	(	I2C_TypeDef *	I2Cx,
		uint32_t	DigitalFilter
	)

Configure Digital Noise Filter.

Note:: If the analog filter is also enabled, the digital filter is added to analog filter. This filter can only be programmed when the I2C is disabled (PE = 0).

Reference Manual to LL API cross reference:: CR1 DNF LL_I2C_SetDigitalFilter

Parameters:

I2Cx	I2C Instance.
DigitalFilter	This parameter must be a value between Min_Data=0x00 (Digital filter disabled) and Max_Data=0x0F (Digital filter enabled and filtering capability up to 15ti2cclk). This parameter is used to configure the digital noise filter on SDA and SCL input. The digital filter will filter spikes with a length of up to DNF[3:0]ti2cclk.

Return values:

None

Definition at line 492 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_SetMasterAddressingMode	(	I2C_TypeDef *	I2Cx,
		uint32_t	AddressingMode
	)

Configure the Master to operate in 7-bit or 10-bit addressing mode.

Note:: Changing this bit is not allowed, when the START bit is set.

Reference Manual to LL API cross reference:: CR2 ADD10 LL_I2C_SetMasterAddressingMode

Parameters:

I2Cx	I2C Instance.
AddressingMode	This parameter can be one of the following values: LL_I2C_ADDRESSING_MODE_7BIT LL_I2C_ADDRESSING_MODE_10BIT

Return values:

None

Definition at line 790 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_SetMode	(	I2C_TypeDef *	I2Cx,
		uint32_t	PeripheralMode
	)

Configure peripheral mode.

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.

Reference Manual to LL API cross reference:: CR1 SMBHEN LL_I2C_SetMode
CR1 SMBDEN LL_I2C_SetMode

Parameters:

I2Cx	I2C Instance.
PeripheralMode	This parameter can be one of the following values: LL_I2C_MODE_I2C LL_I2C_MODE_SMBUS_HOST LL_I2C_MODE_SMBUS_DEVICE LL_I2C_MODE_SMBUS_DEVICE_ARP

Return values:

None

Definition at line 996 of file stm32l4xx_ll_i2c.h.

Referenced by LL_I2C_Init().

__STATIC_INLINE void LL_I2C_SetOwnAddress1	(	I2C_TypeDef *	I2Cx,
		uint32_t	OwnAddress1,
		uint32_t	OwnAddrSize
	)

Set the Own Address1.

Reference Manual to LL API cross reference:: OAR1 OA1 LL_I2C_SetOwnAddress1
OAR1 OA1MODE LL_I2C_SetOwnAddress1

Parameters:

I2Cx	I2C Instance.
OwnAddress1	This parameter must be a value between Min_Data=0 and Max_Data=0x3FF.
OwnAddrSize	This parameter can be one of the following values: LL_I2C_OWNADDRESS1_7BIT LL_I2C_OWNADDRESS1_10BIT

Return values:

None

Definition at line 819 of file stm32l4xx_ll_i2c.h.

Referenced by LL_I2C_Init().

__STATIC_INLINE void LL_I2C_SetOwnAddress2	(	I2C_TypeDef *	I2Cx,
		uint32_t	OwnAddress2,
		uint32_t	OwnAddrMask
	)

Set the 7bits Own Address2.

Note:: This action has no effect if own address2 is enabled.

Reference Manual to LL API cross reference:: OAR2 OA2 LL_I2C_SetOwnAddress2
OAR2 OA2MSK LL_I2C_SetOwnAddress2

Parameters:

I2Cx	I2C Instance.
OwnAddress2	Value between Min_Data=0 and Max_Data=0x7F.
OwnAddrMask	This parameter can be one of the following values: LL_I2C_OWNADDRESS2_NOMASK LL_I2C_OWNADDRESS2_MASK01 LL_I2C_OWNADDRESS2_MASK02 LL_I2C_OWNADDRESS2_MASK03 LL_I2C_OWNADDRESS2_MASK04 LL_I2C_OWNADDRESS2_MASK05 LL_I2C_OWNADDRESS2_MASK06 LL_I2C_OWNADDRESS2_MASK07

Return values:

None

Definition at line 875 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_SetSMBusTimeoutA	(	I2C_TypeDef *	I2Cx,
		uint32_t	TimeoutA
	)

Configure the SMBus Clock TimeoutA (SCL low timeout or SCL and SDA high timeout depends on TimeoutA mode).

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.; These bits can only be programmed when TimeoutA is disabled.

Reference Manual to LL API cross reference:: TIMEOUTR TIMEOUTA LL_I2C_SetSMBusTimeoutA

Parameters:

I2Cx	I2C Instance.
TimeoutA	This parameter must be a value between Min_Data=0 and Max_Data=0xFFF.

Return values:

None

Definition at line 1140 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_SetSMBusTimeoutAMode	(	I2C_TypeDef *	I2Cx,
		uint32_t	TimeoutAMode
	)

Set the SMBus Clock TimeoutA mode.

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.; This bit can only be programmed when TimeoutA is disabled.

Reference Manual to LL API cross reference:: TIMEOUTR TIDLE LL_I2C_SetSMBusTimeoutAMode

Parameters:

I2Cx	I2C Instance.
TimeoutAMode	This parameter can be one of the following values: LL_I2C_SMBUS_TIMEOUTA_MODE_SCL_LOW LL_I2C_SMBUS_TIMEOUTA_MODE_SDA_SCL_HIGH

Return values:

None

Definition at line 1170 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_SetSMBusTimeoutB	(	I2C_TypeDef *	I2Cx,
		uint32_t	TimeoutB
	)

Configure the SMBus Extended Cumulative Clock TimeoutB (Master or Slave mode).

Note:: The macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance.; These bits can only be programmed when TimeoutB is disabled.

Reference Manual to LL API cross reference:: TIMEOUTR TIMEOUTB LL_I2C_SetSMBusTimeoutB

Parameters:

I2Cx	I2C Instance.
TimeoutB	This parameter must be a value between Min_Data=0 and Max_Data=0xFFF.

Return values:

None

Definition at line 1200 of file stm32l4xx_ll_i2c.h.

__STATIC_INLINE void LL_I2C_SetTiming	(	I2C_TypeDef *	I2Cx,
		uint32_t	Timing
	)

Configure the SDA setup, hold time and the SCL high, low period.

Note:: This bit can only be programmed when the I2C is disabled (PE = 0).

Reference Manual to LL API cross reference:: TIMINGR TIMINGR LL_I2C_SetTiming

Parameters:

I2Cx	I2C Instance.
Timing	This parameter must be a value between Min_Data=0 and Max_Data=0xFFFFFFFF.

Note:: This parameter is computed with the STM32CubeMX Tool.

Return values:

None

Definition at line 922 of file stm32l4xx_ll_i2c.h.

Referenced by LL_I2C_Init().

Functions

Function Documentation