Functions
__STATIC_INLINE void	LL_I2C_Enable (I2C_TypeDef *I2Cx)
	Enable I2C peripheral (PE = 1). CR1 PE LL_I2C_Enable. More...

__STATIC_INLINE void	LL_I2C_Disable (I2C_TypeDef *I2Cx)
	Disable I2C peripheral (PE = 0). More...

__STATIC_INLINE uint32_t	LL_I2C_IsEnabled (I2C_TypeDef *I2Cx)
	Check if the I2C peripheral is enabled or disabled. CR1 PE LL_I2C_IsEnabled. More...

__STATIC_INLINE void	LL_I2C_ConfigFilters (I2C_TypeDef *I2Cx, uint32_t AnalogFilter, uint32_t DigitalFilter)
	Configure Noise Filters (Analog and Digital). More...

__STATIC_INLINE void	LL_I2C_SetDigitalFilter (I2C_TypeDef *I2Cx, uint32_t DigitalFilter)
	Configure Digital Noise Filter. More...

__STATIC_INLINE uint32_t	LL_I2C_GetDigitalFilter (I2C_TypeDef *I2Cx)
	Get the current Digital Noise Filter configuration. CR1 DNF LL_I2C_GetDigitalFilter. More...

__STATIC_INLINE void	LL_I2C_EnableAnalogFilter (I2C_TypeDef *I2Cx)
	Enable Analog Noise Filter. More...

__STATIC_INLINE void	LL_I2C_DisableAnalogFilter (I2C_TypeDef *I2Cx)
	Disable Analog Noise Filter. More...

__STATIC_INLINE uint32_t	LL_I2C_IsEnabledAnalogFilter (I2C_TypeDef *I2Cx)
	Check if Analog Noise Filter is enabled or disabled. CR1 ANFOFF LL_I2C_IsEnabledAnalogFilter. More...

__STATIC_INLINE void	LL_I2C_EnableDMAReq_TX (I2C_TypeDef *I2Cx)
	Enable DMA transmission requests. CR1 TXDMAEN LL_I2C_EnableDMAReq_TX. More...

__STATIC_INLINE void	LL_I2C_DisableDMAReq_TX (I2C_TypeDef *I2Cx)
	Disable DMA transmission requests. CR1 TXDMAEN LL_I2C_DisableDMAReq_TX. More...

__STATIC_INLINE uint32_t	LL_I2C_IsEnabledDMAReq_TX (I2C_TypeDef *I2Cx)
	Check if DMA transmission requests are enabled or disabled. CR1 TXDMAEN LL_I2C_IsEnabledDMAReq_TX. More...

__STATIC_INLINE void	LL_I2C_EnableDMAReq_RX (I2C_TypeDef *I2Cx)
	Enable DMA reception requests. CR1 RXDMAEN LL_I2C_EnableDMAReq_RX. More...

__STATIC_INLINE void	LL_I2C_DisableDMAReq_RX (I2C_TypeDef *I2Cx)
	Disable DMA reception requests. CR1 RXDMAEN LL_I2C_DisableDMAReq_RX. More...

__STATIC_INLINE uint32_t	LL_I2C_IsEnabledDMAReq_RX (I2C_TypeDef *I2Cx)
	Check if DMA reception requests are enabled or disabled. CR1 RXDMAEN LL_I2C_IsEnabledDMAReq_RX. More...

__STATIC_INLINE uint32_t	LL_I2C_DMA_GetRegAddr (I2C_TypeDef *I2Cx, uint32_t Direction)
	Get the data register address used for DMA transfer TXDR TXDATA LL_I2C_DMA_GetRegAddr RXDR RXDATA LL_I2C_DMA_GetRegAddr. More...

__STATIC_INLINE void	LL_I2C_EnableClockStretching (I2C_TypeDef *I2Cx)
	Enable Clock stretching. More...

__STATIC_INLINE void	LL_I2C_DisableClockStretching (I2C_TypeDef *I2Cx)
	Disable Clock stretching. More...

__STATIC_INLINE uint32_t	LL_I2C_IsEnabledClockStretching (I2C_TypeDef *I2Cx)
	Check if Clock stretching is enabled or disabled. CR1 NOSTRETCH LL_I2C_IsEnabledClockStretching. More...

__STATIC_INLINE void	LL_I2C_EnableSlaveByteControl (I2C_TypeDef *I2Cx)
	Enable hardware byte control in slave mode. CR1 SBC LL_I2C_EnableSlaveByteControl. More...

__STATIC_INLINE void	LL_I2C_DisableSlaveByteControl (I2C_TypeDef *I2Cx)
	Disable hardware byte control in slave mode. CR1 SBC LL_I2C_DisableSlaveByteControl. More...

__STATIC_INLINE uint32_t	LL_I2C_IsEnabledSlaveByteControl (I2C_TypeDef *I2Cx)
	Check if hardware byte control in slave mode is enabled or disabled. CR1 SBC LL_I2C_IsEnabledSlaveByteControl. More...

__STATIC_INLINE void	LL_I2C_EnableWakeUpFromStop (I2C_TypeDef *I2Cx)
	Enable Wakeup from STOP. More...

__STATIC_INLINE void	LL_I2C_DisableWakeUpFromStop (I2C_TypeDef *I2Cx)
	Disable Wakeup from STOP. More...

__STATIC_INLINE uint32_t	LL_I2C_IsEnabledWakeUpFromStop (I2C_TypeDef *I2Cx)
	Check if Wakeup from STOP is enabled or disabled. More...

__STATIC_INLINE void	LL_I2C_EnableGeneralCall (I2C_TypeDef *I2Cx)
	Enable General Call. More...

__STATIC_INLINE void	LL_I2C_DisableGeneralCall (I2C_TypeDef *I2Cx)
	Disable General Call. More...

__STATIC_INLINE uint32_t	LL_I2C_IsEnabledGeneralCall (I2C_TypeDef *I2Cx)
	Check if General Call is enabled or disabled. CR1 GCEN LL_I2C_IsEnabledGeneralCall. More...

__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. More...

__STATIC_INLINE uint32_t	LL_I2C_GetMasterAddressingMode (I2C_TypeDef *I2Cx)
	Get the Master addressing mode. CR2 ADD10 LL_I2C_GetMasterAddressingMode. More...

__STATIC_INLINE void	LL_I2C_SetOwnAddress1 (I2C_TypeDef *I2Cx, uint32_t OwnAddress1, uint32_t OwnAddrSize)
	Set the Own Address1. OAR1 OA1 LL_I2C_SetOwnAddress1 OAR1 OA1MODE LL_I2C_SetOwnAddress1. More...

__STATIC_INLINE void	LL_I2C_EnableOwnAddress1 (I2C_TypeDef *I2Cx)
	Enable acknowledge on Own Address1 match address. OAR1 OA1EN LL_I2C_EnableOwnAddress1. More...

__STATIC_INLINE void	LL_I2C_DisableOwnAddress1 (I2C_TypeDef *I2Cx)
	Disable acknowledge on Own Address1 match address. OAR1 OA1EN LL_I2C_DisableOwnAddress1. More...

__STATIC_INLINE uint32_t	LL_I2C_IsEnabledOwnAddress1 (I2C_TypeDef *I2Cx)
	Check if Own Address1 acknowledge is enabled or disabled. OAR1 OA1EN LL_I2C_IsEnabledOwnAddress1. More...

__STATIC_INLINE void	LL_I2C_SetOwnAddress2 (I2C_TypeDef *I2Cx, uint32_t OwnAddress2, uint32_t OwnAddrMask)
	Set the 7bits Own Address2. More...

__STATIC_INLINE void	LL_I2C_EnableOwnAddress2 (I2C_TypeDef *I2Cx)
	Enable acknowledge on Own Address2 match address. OAR2 OA2EN LL_I2C_EnableOwnAddress2. More...

__STATIC_INLINE void	LL_I2C_DisableOwnAddress2 (I2C_TypeDef *I2Cx)
	Disable acknowledge on Own Address2 match address. OAR2 OA2EN LL_I2C_DisableOwnAddress2. More...

__STATIC_INLINE uint32_t	LL_I2C_IsEnabledOwnAddress2 (I2C_TypeDef *I2Cx)
	Check if Own Address1 acknowledge is enabled or disabled. OAR2 OA2EN LL_I2C_IsEnabledOwnAddress2. More...

__STATIC_INLINE void	LL_I2C_SetTiming (I2C_TypeDef *I2Cx, uint32_t Timing)
	Configure the SDA setup, hold time and the SCL high, low period. More...

__STATIC_INLINE uint32_t	LL_I2C_GetTimingPrescaler (I2C_TypeDef *I2Cx)
	Get the Timing Prescaler setting. TIMINGR PRESC LL_I2C_GetTimingPrescaler. More...

__STATIC_INLINE uint32_t	LL_I2C_GetClockLowPeriod (I2C_TypeDef *I2Cx)
	Get the SCL low period setting. TIMINGR SCLL LL_I2C_GetClockLowPeriod. More...

__STATIC_INLINE uint32_t	LL_I2C_GetClockHighPeriod (I2C_TypeDef *I2Cx)
	Get the SCL high period setting. TIMINGR SCLH LL_I2C_GetClockHighPeriod. More...

__STATIC_INLINE uint32_t	LL_I2C_GetDataHoldTime (I2C_TypeDef *I2Cx)
	Get the SDA hold time. TIMINGR SDADEL LL_I2C_GetDataHoldTime. More...

__STATIC_INLINE uint32_t	LL_I2C_GetDataSetupTime (I2C_TypeDef *I2Cx)
	Get the SDA setup time. TIMINGR SCLDEL LL_I2C_GetDataSetupTime. More...

__STATIC_INLINE void	LL_I2C_SetMode (I2C_TypeDef *I2Cx, uint32_t PeripheralMode)
	Configure peripheral mode. More...

__STATIC_INLINE uint32_t	LL_I2C_GetMode (I2C_TypeDef *I2Cx)
	Get peripheral mode. More...

__STATIC_INLINE void	LL_I2C_EnableSMBusAlert (I2C_TypeDef *I2Cx)
	Enable SMBus alert (Host or Device mode) More...

__STATIC_INLINE void	LL_I2C_DisableSMBusAlert (I2C_TypeDef *I2Cx)
	Disable SMBus alert (Host or Device mode) More...

__STATIC_INLINE uint32_t	LL_I2C_IsEnabledSMBusAlert (I2C_TypeDef *I2Cx)
	Check if SMBus alert (Host or Device mode) is enabled or disabled. More...

__STATIC_INLINE void	LL_I2C_EnableSMBusPEC (I2C_TypeDef *I2Cx)
	Enable SMBus Packet Error Calculation (PEC). More...

__STATIC_INLINE void	LL_I2C_DisableSMBusPEC (I2C_TypeDef *I2Cx)
	Disable SMBus Packet Error Calculation (PEC). More...

__STATIC_INLINE uint32_t	LL_I2C_IsEnabledSMBusPEC (I2C_TypeDef *I2Cx)
	Check if SMBus Packet Error Calculation (PEC) is enabled or disabled. More...

__STATIC_INLINE void	LL_I2C_ConfigSMBusTimeout (I2C_TypeDef *I2Cx, uint32_t TimeoutA, uint32_t TimeoutAMode, uint32_t TimeoutB)
	Configure the SMBus Clock Timeout. More...

__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). More...

__STATIC_INLINE uint32_t	LL_I2C_GetSMBusTimeoutA (I2C_TypeDef *I2Cx)
	Get the SMBus Clock TimeoutA setting. More...

__STATIC_INLINE void	LL_I2C_SetSMBusTimeoutAMode (I2C_TypeDef *I2Cx, uint32_t TimeoutAMode)
	Set the SMBus Clock TimeoutA mode. More...

__STATIC_INLINE uint32_t	LL_I2C_GetSMBusTimeoutAMode (I2C_TypeDef *I2Cx)
	Get the SMBus Clock TimeoutA mode. More...

__STATIC_INLINE void	LL_I2C_SetSMBusTimeoutB (I2C_TypeDef *I2Cx, uint32_t TimeoutB)
	Configure the SMBus Extended Cumulative Clock TimeoutB (Master or Slave mode). More...

__STATIC_INLINE uint32_t	LL_I2C_GetSMBusTimeoutB (I2C_TypeDef *I2Cx)
	Get the SMBus Extented Cumulative Clock TimeoutB setting. More...

__STATIC_INLINE void	LL_I2C_EnableSMBusTimeout (I2C_TypeDef *I2Cx, uint32_t ClockTimeout)
	Enable the SMBus Clock Timeout. More...

__STATIC_INLINE void	LL_I2C_DisableSMBusTimeout (I2C_TypeDef *I2Cx, uint32_t ClockTimeout)
	Disable the SMBus Clock Timeout. More...

__STATIC_INLINE uint32_t	LL_I2C_IsEnabledSMBusTimeout (I2C_TypeDef *I2Cx, uint32_t ClockTimeout)
	Check if the SMBus Clock Timeout is enabled or disabled. More...

Detailed Description

Function Documentation

◆ LL_I2C_ConfigFilters()

__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). 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 436 of file stm32l4xx_ll_i2c.h.

 {
   MODIFY_REG(I2Cx->CR1, I2C_CR1_ANFOFF | I2C_CR1_DNF, AnalogFilter | (DigitalFilter << I2C_CR1_DNF_Pos));
 }

◆ LL_I2C_ConfigSMBusTimeout()

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

Configure the SMBus Clock Timeout.

Note: 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). 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 1083 of file stm32l4xx_ll_i2c.h.

 {
   MODIFY_REG(I2Cx->TIMEOUTR, I2C_TIMEOUTR_TIMEOUTA | I2C_TIMEOUTR_TIDLE | I2C_TIMEOUTR_TIMEOUTB,
              TimeoutA | TimeoutAMode | (TimeoutB << I2C_TIMEOUTR_TIMEOUTB_Pos));
 }

◆ LL_I2C_Disable()

__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. CR1 PE LL_I2C_Disable

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 405 of file stm32l4xx_ll_i2c.h.

 {
   CLEAR_BIT(I2Cx->CR1, I2C_CR1_PE);
 }

◆ LL_I2C_DisableAnalogFilter()

__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). CR1 ANFOFF LL_I2C_DisableAnalogFilter

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 487 of file stm32l4xx_ll_i2c.h.

 {
   SET_BIT(I2Cx->CR1, I2C_CR1_ANFOFF);
 }

◆ LL_I2C_DisableClockStretching()

__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). CR1 NOSTRETCH LL_I2C_DisableClockStretching

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 616 of file stm32l4xx_ll_i2c.h.

 {
   SET_BIT(I2Cx->CR1, I2C_CR1_NOSTRETCH);
 }

◆ LL_I2C_DisableDMAReq_RX()

__STATIC_INLINE void LL_I2C_DisableDMAReq_RX ( I2C_TypeDef * I2Cx )

Disable DMA reception requests. CR1 RXDMAEN LL_I2C_DisableDMAReq_RX.

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 553 of file stm32l4xx_ll_i2c.h.

 {
   CLEAR_BIT(I2Cx->CR1, I2C_CR1_RXDMAEN);
 }

◆ LL_I2C_DisableDMAReq_TX()

__STATIC_INLINE void LL_I2C_DisableDMAReq_TX ( I2C_TypeDef * I2Cx )

Disable DMA transmission requests. CR1 TXDMAEN LL_I2C_DisableDMAReq_TX.

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 520 of file stm32l4xx_ll_i2c.h.

 {
   CLEAR_BIT(I2Cx->CR1, I2C_CR1_TXDMAEN);
 }

◆ LL_I2C_DisableGeneralCall()

__STATIC_INLINE void LL_I2C_DisableGeneralCall ( I2C_TypeDef * I2Cx )

Disable General Call.

Note: When disabled the Address 0x00 is NACKed. CR1 GCEN LL_I2C_DisableGeneralCall

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 724 of file stm32l4xx_ll_i2c.h.

 {
   CLEAR_BIT(I2Cx->CR1, I2C_CR1_GCEN);
 }

◆ LL_I2C_DisableOwnAddress1()

__STATIC_INLINE void LL_I2C_DisableOwnAddress1 ( I2C_TypeDef * I2Cx )

Disable acknowledge on Own Address1 match address. OAR1 OA1EN LL_I2C_DisableOwnAddress1.

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 801 of file stm32l4xx_ll_i2c.h.

 {
   CLEAR_BIT(I2Cx->OAR1, I2C_OAR1_OA1EN);
 }

◆ LL_I2C_DisableOwnAddress2()

__STATIC_INLINE void LL_I2C_DisableOwnAddress2 ( I2C_TypeDef * I2Cx )

Disable acknowledge on Own Address2 match address. OAR2 OA2EN LL_I2C_DisableOwnAddress2.

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 857 of file stm32l4xx_ll_i2c.h.

 {
   CLEAR_BIT(I2Cx->OAR2, I2C_OAR2_OA2EN);
 }

◆ LL_I2C_DisableSlaveByteControl()

__STATIC_INLINE void LL_I2C_DisableSlaveByteControl ( I2C_TypeDef * I2Cx )

Disable hardware byte control in slave mode. CR1 SBC LL_I2C_DisableSlaveByteControl.

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 649 of file stm32l4xx_ll_i2c.h.

 {
   CLEAR_BIT(I2Cx->CR1, I2C_CR1_SBC);
 }

◆ LL_I2C_DisableSMBusAlert()

__STATIC_INLINE void LL_I2C_DisableSMBusAlert ( I2C_TypeDef * I2Cx )

Disable SMBus alert (Host or Device mode)

Note

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. CR1 ALERTEN LL_I2C_DisableSMBusAlert

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 1010 of file stm32l4xx_ll_i2c.h.

 {
   CLEAR_BIT(I2Cx->CR1, I2C_CR1_ALERTEN);
 }

◆ LL_I2C_DisableSMBusPEC()

__STATIC_INLINE void LL_I2C_DisableSMBusPEC ( I2C_TypeDef * I2Cx )

Disable SMBus Packet Error Calculation (PEC).

Note: Macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance. CR1 PECEN LL_I2C_DisableSMBusPEC

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 1049 of file stm32l4xx_ll_i2c.h.

 {
   CLEAR_BIT(I2Cx->CR1, I2C_CR1_PECEN);
 }

◆ LL_I2C_DisableSMBusTimeout()

__STATIC_INLINE void LL_I2C_DisableSMBusTimeout	(	I2C_TypeDef *	I2Cx,
		uint32_t	ClockTimeout
	)

Disable the SMBus Clock Timeout.

Note: Macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance. 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 1209 of file stm32l4xx_ll_i2c.h.

 {
   CLEAR_BIT(I2Cx->TIMEOUTR, ClockTimeout);
 }

◆ LL_I2C_DisableWakeUpFromStop()

__STATIC_INLINE void LL_I2C_DisableWakeUpFromStop ( I2C_TypeDef * I2Cx )

Disable Wakeup from STOP.

Note: Macro IS_I2C_WAKEUP_FROMSTOP_INSTANCE(I2Cx) can be used to check whether or not WakeUpFromStop feature is supported by the I2Cx Instance. CR1 WUPEN LL_I2C_DisableWakeUpFromStop

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 687 of file stm32l4xx_ll_i2c.h.

 {
   CLEAR_BIT(I2Cx->CR1, I2C_CR1_WUPEN);
 }

◆ LL_I2C_DMA_GetRegAddr()

__STATIC_INLINE uint32_t LL_I2C_DMA_GetRegAddr	(	I2C_TypeDef *	I2Cx,
		uint32_t	Direction
	)

Get the data register address used for DMA transfer 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 579 of file stm32l4xx_ll_i2c.h.

 {
   register uint32_t data_reg_addr;
 
   if (Direction == LL_I2C_DMA_REG_DATA_TRANSMIT)
   {
     /* return address of TXDR register */
     data_reg_addr = (uint32_t) & (I2Cx->TXDR);
   }
   else
   {
     /* return address of RXDR register */
     data_reg_addr = (uint32_t) & (I2Cx->RXDR);
   }
 
   return data_reg_addr;
 }

◆ LL_I2C_Enable()

__STATIC_INLINE void LL_I2C_Enable ( I2C_TypeDef * I2Cx )

Enable I2C peripheral (PE = 1). CR1 PE LL_I2C_Enable.

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 391 of file stm32l4xx_ll_i2c.h.

 {
   SET_BIT(I2Cx->CR1, I2C_CR1_PE);
 }

◆ LL_I2C_EnableAnalogFilter()

__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). CR1 ANFOFF LL_I2C_EnableAnalogFilter

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 475 of file stm32l4xx_ll_i2c.h.

 {
   CLEAR_BIT(I2Cx->CR1, I2C_CR1_ANFOFF);
 }

◆ LL_I2C_EnableClockStretching()

__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). CR1 NOSTRETCH LL_I2C_EnableClockStretching

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 604 of file stm32l4xx_ll_i2c.h.

 {
   CLEAR_BIT(I2Cx->CR1, I2C_CR1_NOSTRETCH);
 }

◆ LL_I2C_EnableDMAReq_RX()

__STATIC_INLINE void LL_I2C_EnableDMAReq_RX ( I2C_TypeDef * I2Cx )

Enable DMA reception requests. CR1 RXDMAEN LL_I2C_EnableDMAReq_RX.

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 542 of file stm32l4xx_ll_i2c.h.

 {
   SET_BIT(I2Cx->CR1, I2C_CR1_RXDMAEN);
 }

◆ LL_I2C_EnableDMAReq_TX()

__STATIC_INLINE void LL_I2C_EnableDMAReq_TX ( I2C_TypeDef * I2Cx )

Enable DMA transmission requests. CR1 TXDMAEN LL_I2C_EnableDMAReq_TX.

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 509 of file stm32l4xx_ll_i2c.h.

 {
   SET_BIT(I2Cx->CR1, I2C_CR1_TXDMAEN);
 }

◆ LL_I2C_EnableGeneralCall()

__STATIC_INLINE void LL_I2C_EnableGeneralCall ( I2C_TypeDef * I2Cx )

Enable General Call.

Note: When enabled the Address 0x00 is ACKed. CR1 GCEN LL_I2C_EnableGeneralCall

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 712 of file stm32l4xx_ll_i2c.h.

 {
   SET_BIT(I2Cx->CR1, I2C_CR1_GCEN);
 }

◆ LL_I2C_EnableOwnAddress1()

__STATIC_INLINE void LL_I2C_EnableOwnAddress1 ( I2C_TypeDef * I2Cx )

Enable acknowledge on Own Address1 match address. OAR1 OA1EN LL_I2C_EnableOwnAddress1.

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 790 of file stm32l4xx_ll_i2c.h.

 {
   SET_BIT(I2Cx->OAR1, I2C_OAR1_OA1EN);
 }

◆ LL_I2C_EnableOwnAddress2()

__STATIC_INLINE void LL_I2C_EnableOwnAddress2 ( I2C_TypeDef * I2Cx )

Enable acknowledge on Own Address2 match address. OAR2 OA2EN LL_I2C_EnableOwnAddress2.

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 846 of file stm32l4xx_ll_i2c.h.

 {
   SET_BIT(I2Cx->OAR2, I2C_OAR2_OA2EN);
 }

◆ LL_I2C_EnableSlaveByteControl()

__STATIC_INLINE void LL_I2C_EnableSlaveByteControl ( I2C_TypeDef * I2Cx )

Enable hardware byte control in slave mode. CR1 SBC LL_I2C_EnableSlaveByteControl.

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 638 of file stm32l4xx_ll_i2c.h.

 {
   SET_BIT(I2Cx->CR1, I2C_CR1_SBC);
 }

◆ LL_I2C_EnableSMBusAlert()

__STATIC_INLINE void LL_I2C_EnableSMBusAlert ( I2C_TypeDef * I2Cx )

Enable SMBus alert (Host or Device mode)

Note

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. CR1 ALERTEN LL_I2C_EnableSMBusAlert

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 992 of file stm32l4xx_ll_i2c.h.

 {
   SET_BIT(I2Cx->CR1, I2C_CR1_ALERTEN);
 }

◆ LL_I2C_EnableSMBusPEC()

__STATIC_INLINE void LL_I2C_EnableSMBusPEC ( I2C_TypeDef * I2Cx )

Enable SMBus Packet Error Calculation (PEC).

Note: Macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance. CR1 PECEN LL_I2C_EnableSMBusPEC

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 1036 of file stm32l4xx_ll_i2c.h.

 {
   SET_BIT(I2Cx->CR1, I2C_CR1_PECEN);
 }

◆ LL_I2C_EnableSMBusTimeout()

__STATIC_INLINE void LL_I2C_EnableSMBusTimeout	(	I2C_TypeDef *	I2Cx,
		uint32_t	ClockTimeout
	)

Enable the SMBus Clock Timeout.

Note: Macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance. 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 1191 of file stm32l4xx_ll_i2c.h.

 {
   SET_BIT(I2Cx->TIMEOUTR, ClockTimeout);
 }

◆ LL_I2C_EnableWakeUpFromStop()

__STATIC_INLINE void LL_I2C_EnableWakeUpFromStop ( I2C_TypeDef * I2Cx )

Enable Wakeup from STOP.

Note: 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. CR1 WUPEN LL_I2C_EnableWakeUpFromStop

Parameters

I2Cx	I2C Instance.

Return values

None

Definition at line 674 of file stm32l4xx_ll_i2c.h.

 {
   SET_BIT(I2Cx->CR1, I2C_CR1_WUPEN);
 }

◆ LL_I2C_GetClockHighPeriod()

__STATIC_INLINE uint32_t LL_I2C_GetClockHighPeriod ( I2C_TypeDef * I2Cx )

Get the SCL high period setting. TIMINGR SCLH LL_I2C_GetClockHighPeriod.

Parameters

I2Cx	I2C Instance.

Return values

Value between Min_Data=0x00 and Max_Data=0xFF

Definition at line 915 of file stm32l4xx_ll_i2c.h.

 {
   return (uint32_t)(READ_BIT(I2Cx->TIMINGR, I2C_TIMINGR_SCLH) >> I2C_TIMINGR_SCLH_Pos);
 }

◆ LL_I2C_GetClockLowPeriod()

__STATIC_INLINE uint32_t LL_I2C_GetClockLowPeriod ( I2C_TypeDef * I2Cx )

Get the SCL low period setting. TIMINGR SCLL LL_I2C_GetClockLowPeriod.

Parameters

I2Cx	I2C Instance.

Return values

Value between Min_Data=0x00 and Max_Data=0xFF

Definition at line 904 of file stm32l4xx_ll_i2c.h.

 {
   return (uint32_t)(READ_BIT(I2Cx->TIMINGR, I2C_TIMINGR_SCLL) >> I2C_TIMINGR_SCLL_Pos);
 }

◆ LL_I2C_GetDataHoldTime()

__STATIC_INLINE uint32_t LL_I2C_GetDataHoldTime ( I2C_TypeDef * I2Cx )

Get the SDA hold time. TIMINGR SDADEL LL_I2C_GetDataHoldTime.

Parameters

I2Cx	I2C Instance.

Return values

Value between Min_Data=0x0 and Max_Data=0xF

Definition at line 926 of file stm32l4xx_ll_i2c.h.

 {
   return (uint32_t)(READ_BIT(I2Cx->TIMINGR, I2C_TIMINGR_SDADEL) >> I2C_TIMINGR_SDADEL_Pos);
 }

◆ LL_I2C_GetDataSetupTime()

__STATIC_INLINE uint32_t LL_I2C_GetDataSetupTime ( I2C_TypeDef * I2Cx )

Get the SDA setup time. TIMINGR SCLDEL LL_I2C_GetDataSetupTime.

Parameters

I2Cx	I2C Instance.

Return values

Value between Min_Data=0x0 and Max_Data=0xF

Definition at line 937 of file stm32l4xx_ll_i2c.h.

 {
   return (uint32_t)(READ_BIT(I2Cx->TIMINGR, I2C_TIMINGR_SCLDEL) >> I2C_TIMINGR_SCLDEL_Pos);
 }

◆ LL_I2C_GetDigitalFilter()

__STATIC_INLINE uint32_t LL_I2C_GetDigitalFilter ( I2C_TypeDef * I2Cx )

Get the current Digital Noise Filter configuration. CR1 DNF LL_I2C_GetDigitalFilter.

Parameters

I2Cx	I2C Instance.

Return values

Value between Min_Data=0x0 and Max_Data=0xF

Definition at line 463 of file stm32l4xx_ll_i2c.h.

 {
   return (uint32_t)(READ_BIT(I2Cx->CR1, I2C_CR1_DNF) >> I2C_CR1_DNF_Pos);
 }

◆ LL_I2C_GetMasterAddressingMode()

__STATIC_INLINE uint32_t LL_I2C_GetMasterAddressingMode ( I2C_TypeDef * I2Cx )

Get the Master addressing mode. CR2 ADD10 LL_I2C_GetMasterAddressingMode.

Parameters

I2Cx	I2C Instance.

Return values

Returned

value can be one of the following values:

LL_I2C_ADDRESSING_MODE_7BIT
LL_I2C_ADDRESSING_MODE_10BIT

Definition at line 763 of file stm32l4xx_ll_i2c.h.

 {
   return (uint32_t)(READ_BIT(I2Cx->CR2, I2C_CR2_ADD10));
 }

◆ LL_I2C_GetMode()

__STATIC_INLINE uint32_t LL_I2C_GetMode ( I2C_TypeDef * I2Cx )

Get peripheral mode.

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

LL_I2C_MODE_I2C
LL_I2C_MODE_SMBUS_HOST
LL_I2C_MODE_SMBUS_DEVICE
LL_I2C_MODE_SMBUS_DEVICE_ARP

Definition at line 974 of file stm32l4xx_ll_i2c.h.

 {
   return (uint32_t)(READ_BIT(I2Cx->CR1, I2C_CR1_SMBHEN | I2C_CR1_SMBDEN));
 }

◆ LL_I2C_GetSMBusTimeoutA()

__STATIC_INLINE uint32_t LL_I2C_GetSMBusTimeoutA ( I2C_TypeDef * I2Cx )

Get the SMBus Clock TimeoutA setting.

Note: Macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance. TIMEOUTR TIMEOUTA LL_I2C_GetSMBusTimeoutA

Parameters

I2Cx	I2C Instance.

Return values

Value between Min_Data=0 and Max_Data=0xFFF

Definition at line 1113 of file stm32l4xx_ll_i2c.h.

 {
   return (uint32_t)(READ_BIT(I2Cx->TIMEOUTR, I2C_TIMEOUTR_TIMEOUTA));
 }

◆ LL_I2C_GetSMBusTimeoutAMode()

__STATIC_INLINE uint32_t LL_I2C_GetSMBusTimeoutAMode ( I2C_TypeDef * I2Cx )

Get the SMBus Clock TimeoutA mode.

Note: Macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance. TIMEOUTR TIDLE LL_I2C_GetSMBusTimeoutAMode

Parameters

I2Cx	I2C Instance.

Return values

Returned

value can be one of the following values:

LL_I2C_SMBUS_TIMEOUTA_MODE_SCL_LOW
LL_I2C_SMBUS_TIMEOUTA_MODE_SDA_SCL_HIGH

Definition at line 1145 of file stm32l4xx_ll_i2c.h.

 {
   return (uint32_t)(READ_BIT(I2Cx->TIMEOUTR, I2C_TIMEOUTR_TIDLE));
 }

◆ LL_I2C_GetSMBusTimeoutB()

__STATIC_INLINE uint32_t LL_I2C_GetSMBusTimeoutB ( I2C_TypeDef * I2Cx )

Get the SMBus Extented Cumulative Clock TimeoutB setting.

Note: Macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance. TIMEOUTR TIMEOUTB LL_I2C_GetSMBusTimeoutB

Parameters

I2Cx	I2C Instance.

Return values

Value between Min_Data=0 and Max_Data=0xFFF

Definition at line 1173 of file stm32l4xx_ll_i2c.h.

 {
   return (uint32_t)(READ_BIT(I2Cx->TIMEOUTR, I2C_TIMEOUTR_TIMEOUTB) >> I2C_TIMEOUTR_TIMEOUTB_Pos);
 }

◆ LL_I2C_GetTimingPrescaler()

__STATIC_INLINE uint32_t LL_I2C_GetTimingPrescaler ( I2C_TypeDef * I2Cx )

Get the Timing Prescaler setting. TIMINGR PRESC LL_I2C_GetTimingPrescaler.

Parameters

I2Cx	I2C Instance.

Return values

Value between Min_Data=0x0 and Max_Data=0xF

Definition at line 893 of file stm32l4xx_ll_i2c.h.

 {
   return (uint32_t)(READ_BIT(I2Cx->TIMINGR, I2C_TIMINGR_PRESC) >> I2C_TIMINGR_PRESC_Pos);
 }

◆ LL_I2C_IsEnabled()

__STATIC_INLINE uint32_t LL_I2C_IsEnabled ( I2C_TypeDef * I2Cx )

Check if the I2C peripheral is enabled or disabled. CR1 PE LL_I2C_IsEnabled.

Parameters

I2Cx	I2C Instance.

Return values

State of bit (1 or 0).

Definition at line 416 of file stm32l4xx_ll_i2c.h.

 {
   return ((READ_BIT(I2Cx->CR1, I2C_CR1_PE) == (I2C_CR1_PE)) ? 1UL : 0UL);
 }

◆ LL_I2C_IsEnabledAnalogFilter()

__STATIC_INLINE uint32_t LL_I2C_IsEnabledAnalogFilter ( I2C_TypeDef * I2Cx )

Check if Analog Noise Filter is enabled or disabled. CR1 ANFOFF LL_I2C_IsEnabledAnalogFilter.

Parameters

I2Cx	I2C Instance.

Return values

State of bit (1 or 0).

Definition at line 498 of file stm32l4xx_ll_i2c.h.

 {
   return ((READ_BIT(I2Cx->CR1, I2C_CR1_ANFOFF) != (I2C_CR1_ANFOFF)) ? 1UL : 0UL);
 }

◆ LL_I2C_IsEnabledClockStretching()

__STATIC_INLINE uint32_t LL_I2C_IsEnabledClockStretching ( I2C_TypeDef * I2Cx )

Check if Clock stretching is enabled or disabled. CR1 NOSTRETCH LL_I2C_IsEnabledClockStretching.

Parameters

I2Cx	I2C Instance.

Return values

State of bit (1 or 0).

Definition at line 627 of file stm32l4xx_ll_i2c.h.

 {
   return ((READ_BIT(I2Cx->CR1, I2C_CR1_NOSTRETCH) != (I2C_CR1_NOSTRETCH)) ? 1UL : 0UL);
 }

◆ LL_I2C_IsEnabledDMAReq_RX()

__STATIC_INLINE uint32_t LL_I2C_IsEnabledDMAReq_RX ( I2C_TypeDef * I2Cx )

Check if DMA reception requests are enabled or disabled. CR1 RXDMAEN LL_I2C_IsEnabledDMAReq_RX.

Parameters

I2Cx	I2C Instance.

Return values

State of bit (1 or 0).

Definition at line 564 of file stm32l4xx_ll_i2c.h.

 {
   return ((READ_BIT(I2Cx->CR1, I2C_CR1_RXDMAEN) == (I2C_CR1_RXDMAEN)) ? 1UL : 0UL);
 }

◆ LL_I2C_IsEnabledDMAReq_TX()

__STATIC_INLINE uint32_t LL_I2C_IsEnabledDMAReq_TX ( I2C_TypeDef * I2Cx )

Check if DMA transmission requests are enabled or disabled. CR1 TXDMAEN LL_I2C_IsEnabledDMAReq_TX.

Parameters

I2Cx	I2C Instance.

Return values

State of bit (1 or 0).

Definition at line 531 of file stm32l4xx_ll_i2c.h.

 {
   return ((READ_BIT(I2Cx->CR1, I2C_CR1_TXDMAEN) == (I2C_CR1_TXDMAEN)) ? 1UL : 0UL);
 }

◆ LL_I2C_IsEnabledGeneralCall()

__STATIC_INLINE uint32_t LL_I2C_IsEnabledGeneralCall ( I2C_TypeDef * I2Cx )

Check if General Call is enabled or disabled. CR1 GCEN LL_I2C_IsEnabledGeneralCall.

Parameters

I2Cx	I2C Instance.

Return values

State of bit (1 or 0).

Definition at line 735 of file stm32l4xx_ll_i2c.h.

 {
   return ((READ_BIT(I2Cx->CR1, I2C_CR1_GCEN) == (I2C_CR1_GCEN)) ? 1UL : 0UL);
 }

◆ LL_I2C_IsEnabledOwnAddress1()

__STATIC_INLINE uint32_t LL_I2C_IsEnabledOwnAddress1 ( I2C_TypeDef * I2Cx )

Check if Own Address1 acknowledge is enabled or disabled. OAR1 OA1EN LL_I2C_IsEnabledOwnAddress1.

Parameters

I2Cx	I2C Instance.

Return values

State of bit (1 or 0).

Definition at line 812 of file stm32l4xx_ll_i2c.h.

 {
   return ((READ_BIT(I2Cx->OAR1, I2C_OAR1_OA1EN) == (I2C_OAR1_OA1EN)) ? 1UL : 0UL);
 }

◆ LL_I2C_IsEnabledOwnAddress2()

__STATIC_INLINE uint32_t LL_I2C_IsEnabledOwnAddress2 ( I2C_TypeDef * I2Cx )

Check if Own Address1 acknowledge is enabled or disabled. OAR2 OA2EN LL_I2C_IsEnabledOwnAddress2.

Parameters

I2Cx	I2C Instance.

Return values

State of bit (1 or 0).

Definition at line 868 of file stm32l4xx_ll_i2c.h.

 {
   return ((READ_BIT(I2Cx->OAR2, I2C_OAR2_OA2EN) == (I2C_OAR2_OA2EN)) ? 1UL : 0UL);
 }

◆ LL_I2C_IsEnabledSlaveByteControl()

__STATIC_INLINE uint32_t LL_I2C_IsEnabledSlaveByteControl ( I2C_TypeDef * I2Cx )

Check if hardware byte control in slave mode is enabled or disabled. CR1 SBC LL_I2C_IsEnabledSlaveByteControl.

Parameters

I2Cx	I2C Instance.

Return values

State of bit (1 or 0).

Definition at line 660 of file stm32l4xx_ll_i2c.h.

 {
   return ((READ_BIT(I2Cx->CR1, I2C_CR1_SBC) == (I2C_CR1_SBC)) ? 1UL : 0UL);
 }

◆ LL_I2C_IsEnabledSMBusAlert()

__STATIC_INLINE uint32_t LL_I2C_IsEnabledSMBusAlert ( I2C_TypeDef * I2Cx )

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

Note: Macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance. CR1 ALERTEN LL_I2C_IsEnabledSMBusAlert

Parameters

I2Cx	I2C Instance.

Return values

State of bit (1 or 0).

Definition at line 1023 of file stm32l4xx_ll_i2c.h.

 {
   return ((READ_BIT(I2Cx->CR1, I2C_CR1_ALERTEN) == (I2C_CR1_ALERTEN)) ? 1UL : 0UL);
 }

◆ LL_I2C_IsEnabledSMBusPEC()

__STATIC_INLINE uint32_t LL_I2C_IsEnabledSMBusPEC ( I2C_TypeDef * I2Cx )

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

Note: Macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance. CR1 PECEN LL_I2C_IsEnabledSMBusPEC

Parameters

I2Cx	I2C Instance.

Return values

State of bit (1 or 0).

Definition at line 1062 of file stm32l4xx_ll_i2c.h.

 {
   return ((READ_BIT(I2Cx->CR1, I2C_CR1_PECEN) == (I2C_CR1_PECEN)) ? 1UL : 0UL);
 }

◆ LL_I2C_IsEnabledSMBusTimeout()

__STATIC_INLINE uint32_t LL_I2C_IsEnabledSMBusTimeout	(	I2C_TypeDef *	I2Cx,
		uint32_t	ClockTimeout
	)

Check if the SMBus Clock Timeout is enabled or disabled.

Note: Macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance. 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 1227 of file stm32l4xx_ll_i2c.h.

 {
   return ((READ_BIT(I2Cx->TIMEOUTR, (I2C_TIMEOUTR_TIMOUTEN | I2C_TIMEOUTR_TEXTEN)) == (ClockTimeout)) ? 1UL : 0UL);
 }

◆ LL_I2C_IsEnabledWakeUpFromStop()

__STATIC_INLINE uint32_t LL_I2C_IsEnabledWakeUpFromStop ( I2C_TypeDef * I2Cx )

Check if Wakeup from STOP is enabled or disabled.

Note: Macro IS_I2C_WAKEUP_FROMSTOP_INSTANCE(I2Cx) can be used to check whether or not WakeUpFromStop feature is supported by the I2Cx Instance. CR1 WUPEN LL_I2C_IsEnabledWakeUpFromStop

Parameters

I2Cx	I2C Instance.

Return values

State of bit (1 or 0).

Definition at line 700 of file stm32l4xx_ll_i2c.h.

 {
   return ((READ_BIT(I2Cx->CR1, I2C_CR1_WUPEN) == (I2C_CR1_WUPEN)) ? 1UL : 0UL);
 }

◆ LL_I2C_SetDigitalFilter()

__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). 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 452 of file stm32l4xx_ll_i2c.h.

 {
   MODIFY_REG(I2Cx->CR1, I2C_CR1_DNF, DigitalFilter << I2C_CR1_DNF_Pos);
 }

◆ LL_I2C_SetMasterAddressingMode()

__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. 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 750 of file stm32l4xx_ll_i2c.h.

 {
   MODIFY_REG(I2Cx->CR2, I2C_CR2_ADD10, AddressingMode);
 }

◆ LL_I2C_SetMode()

__STATIC_INLINE void LL_I2C_SetMode	(	I2C_TypeDef *	I2Cx,
		uint32_t	PeripheralMode
	)

Configure peripheral mode.

Note: Macro IS_SMBUS_ALL_INSTANCE(I2Cx) can be used to check whether or not SMBus feature is supported by the I2Cx Instance. 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 956 of file stm32l4xx_ll_i2c.h.

 {
   MODIFY_REG(I2Cx->CR1, I2C_CR1_SMBHEN | I2C_CR1_SMBDEN, PeripheralMode);
 }

◆ LL_I2C_SetOwnAddress1()

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

Set the Own Address1. 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 779 of file stm32l4xx_ll_i2c.h.

 {
   MODIFY_REG(I2Cx->OAR1, I2C_OAR1_OA1 | I2C_OAR1_OA1MODE, OwnAddress1 | OwnAddrSize);
 }

◆ LL_I2C_SetOwnAddress2()

__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. 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 835 of file stm32l4xx_ll_i2c.h.

 {
   MODIFY_REG(I2Cx->OAR2, I2C_OAR2_OA2 | I2C_OAR2_OA2MSK, OwnAddress2 | OwnAddrMask);
 }

◆ LL_I2C_SetSMBusTimeoutA()

__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: 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. 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 1100 of file stm32l4xx_ll_i2c.h.

 {
   WRITE_REG(I2Cx->TIMEOUTR, TimeoutA);
 }

◆ LL_I2C_SetSMBusTimeoutAMode()

__STATIC_INLINE void LL_I2C_SetSMBusTimeoutAMode	(	I2C_TypeDef *	I2Cx,
		uint32_t	TimeoutAMode
	)

Set the SMBus Clock TimeoutA mode.

Note: 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. 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 1130 of file stm32l4xx_ll_i2c.h.

 {
   WRITE_REG(I2Cx->TIMEOUTR, TimeoutAMode);
 }

◆ LL_I2C_SetSMBusTimeoutB()

__STATIC_INLINE void LL_I2C_SetSMBusTimeoutB	(	I2C_TypeDef *	I2Cx,
		uint32_t	TimeoutB
	)

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

Note: 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. 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 1160 of file stm32l4xx_ll_i2c.h.

 {
   WRITE_REG(I2Cx->TIMEOUTR, TimeoutB << I2C_TIMEOUTR_TIMEOUTB_Pos);
 }

◆ LL_I2C_SetTiming()

__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). 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 882 of file stm32l4xx_ll_i2c.h.

 {
   WRITE_REG(I2Cx->TIMINGR, Timing);
 }

Functions

Detailed Description

Function Documentation

◆ LL_I2C_ConfigFilters()

◆ LL_I2C_ConfigSMBusTimeout()

◆ LL_I2C_Disable()

◆ LL_I2C_DisableAnalogFilter()

◆ LL_I2C_DisableClockStretching()

◆ LL_I2C_DisableDMAReq_RX()

◆ LL_I2C_DisableDMAReq_TX()

◆ LL_I2C_DisableGeneralCall()

◆ LL_I2C_DisableOwnAddress1()

◆ LL_I2C_DisableOwnAddress2()

◆ LL_I2C_DisableSlaveByteControl()

◆ LL_I2C_DisableSMBusAlert()

◆ LL_I2C_DisableSMBusPEC()

◆ LL_I2C_DisableSMBusTimeout()

◆ LL_I2C_DisableWakeUpFromStop()

◆ LL_I2C_DMA_GetRegAddr()

◆ LL_I2C_Enable()

◆ LL_I2C_EnableAnalogFilter()

◆ LL_I2C_EnableClockStretching()

◆ LL_I2C_EnableDMAReq_RX()

◆ LL_I2C_EnableDMAReq_TX()

◆ LL_I2C_EnableGeneralCall()

◆ LL_I2C_EnableOwnAddress1()

◆ LL_I2C_EnableOwnAddress2()

◆ LL_I2C_EnableSlaveByteControl()

◆ LL_I2C_EnableSMBusAlert()

◆ LL_I2C_EnableSMBusPEC()

◆ LL_I2C_EnableSMBusTimeout()

◆ LL_I2C_EnableWakeUpFromStop()

◆ LL_I2C_GetClockHighPeriod()

◆ LL_I2C_GetClockLowPeriod()

◆ LL_I2C_GetDataHoldTime()

◆ LL_I2C_GetDataSetupTime()

◆ LL_I2C_GetDigitalFilter()

◆ LL_I2C_GetMasterAddressingMode()

◆ LL_I2C_GetMode()

◆ LL_I2C_GetSMBusTimeoutA()

◆ LL_I2C_GetSMBusTimeoutAMode()

◆ LL_I2C_GetSMBusTimeoutB()

◆ LL_I2C_GetTimingPrescaler()

◆ LL_I2C_IsEnabled()

◆ LL_I2C_IsEnabledAnalogFilter()

◆ LL_I2C_IsEnabledClockStretching()

◆ LL_I2C_IsEnabledDMAReq_RX()

◆ LL_I2C_IsEnabledDMAReq_TX()

◆ LL_I2C_IsEnabledGeneralCall()

◆ LL_I2C_IsEnabledOwnAddress1()

◆ LL_I2C_IsEnabledOwnAddress2()

◆ LL_I2C_IsEnabledSlaveByteControl()

◆ LL_I2C_IsEnabledSMBusAlert()

◆ LL_I2C_IsEnabledSMBusPEC()

◆ LL_I2C_IsEnabledSMBusTimeout()

◆ LL_I2C_IsEnabledWakeUpFromStop()

◆ LL_I2C_SetDigitalFilter()

◆ LL_I2C_SetMasterAddressingMode()

◆ LL_I2C_SetMode()

◆ LL_I2C_SetOwnAddress1()

◆ LL_I2C_SetOwnAddress2()

◆ LL_I2C_SetSMBusTimeoutA()

◆ LL_I2C_SetSMBusTimeoutAMode()

◆ LL_I2C_SetSMBusTimeoutB()

◆ LL_I2C_SetTiming()