Modules
	Lpi2c_slave_driver

Data Structures
struct	_lpi2c_master_config
	Structure with settings to initialize the LPI2C master module. More...

struct	_lpi2c_match_config
	LPI2C master data match configuration structure. More...

struct	_lpi2c_master_transfer
	Non-blocking transfer descriptor structure. More...

struct	_lpi2c_master_handle
	Driver handle for master non-blocking APIs. More...

Typedefs
typedef enum _lpi2c_direction	lpi2c_direction_t
	Direction of master and slave transfers.

typedef enum _lpi2c_master_pin_config	lpi2c_master_pin_config_t
	LPI2C pin configuration.

typedef enum _lpi2c_host_request_source	lpi2c_host_request_source_t
	LPI2C master host request selection.

typedef enum _lpi2c_host_request_polarity	lpi2c_host_request_polarity_t
	LPI2C master host request pin polarity configuration.

typedef struct _lpi2c_master_config	lpi2c_master_config_t
	Structure with settings to initialize the LPI2C master module. More...

typedef enum _lpi2c_data_match_config_mode	lpi2c_data_match_config_mode_t
	LPI2C master data match configuration modes.

typedef struct _lpi2c_match_config	lpi2c_data_match_config_t
	LPI2C master data match configuration structure.

typedef struct _lpi2c_master_transfer	lpi2c_master_transfer_t

typedef struct _lpi2c_master_handle	lpi2c_master_handle_t

typedef void(*	lpi2c_master_transfer_callback_t) (LPI2C_Type base, lpi2c_master_handle_t handle, status_t completionStatus, void *userData)
	Master completion callback function pointer type. More...

typedef void(*	lpi2c_master_isr_t) (LPI2C_Type base, void handle)
	Typedef for master interrupt handler, used internally for LPI2C master interrupt and EDMA transactional APIs.

Enumerations
enum	_lpi2c_master_flags { kLPI2C_MasterTxReadyFlag = LPI2C_MSR_TDF_MASK , kLPI2C_MasterRxReadyFlag = LPI2C_MSR_RDF_MASK , kLPI2C_MasterEndOfPacketFlag = LPI2C_MSR_EPF_MASK , kLPI2C_MasterStopDetectFlag = LPI2C_MSR_SDF_MASK , kLPI2C_MasterNackDetectFlag = LPI2C_MSR_NDF_MASK , kLPI2C_MasterArbitrationLostFlag = LPI2C_MSR_ALF_MASK , kLPI2C_MasterFifoErrFlag = LPI2C_MSR_FEF_MASK , kLPI2C_MasterPinLowTimeoutFlag = LPI2C_MSR_PLTF_MASK , kLPI2C_MasterDataMatchFlag = LPI2C_MSR_DMF_MASK , kLPI2C_MasterBusyFlag = LPI2C_MSR_MBF_MASK , kLPI2C_MasterBusBusyFlag = LPI2C_MSR_BBF_MASK , kLPI2C_MasterClearFlags , kLPI2C_MasterIrqFlags , kLPI2C_MasterErrorFlags }
	LPI2C master peripheral flags. More...

enum	_lpi2c_direction { kLPI2C_Write = 0U , kLPI2C_Read = 1U }
	Direction of master and slave transfers. More...

enum	_lpi2c_master_pin_config { kLPI2C_2PinOpenDrain = 0x0U , kLPI2C_2PinOutputOnly = 0x1U , kLPI2C_2PinPushPull = 0x2U , kLPI2C_4PinPushPull = 0x3U , kLPI2C_2PinOpenDrainWithSeparateSlave , kLPI2C_2PinOutputOnlyWithSeparateSlave , kLPI2C_2PinPushPullWithSeparateSlave , kLPI2C_4PinPushPullWithInvertedOutput = 0x7U }
	LPI2C pin configuration. More...

enum	_lpi2c_host_request_source { kLPI2C_HostRequestExternalPin = 0x0U , kLPI2C_HostRequestInputTrigger = 0x1U }
	LPI2C master host request selection. More...

enum	_lpi2c_host_request_polarity { kLPI2C_HostRequestPinActiveLow = 0x0U , kLPI2C_HostRequestPinActiveHigh = 0x1U }
	LPI2C master host request pin polarity configuration. More...

enum	_lpi2c_data_match_config_mode { kLPI2C_MatchDisabled = 0x0U , kLPI2C_1stWordEqualsM0OrM1 = 0x2U , kLPI2C_AnyWordEqualsM0OrM1 = 0x3U , kLPI2C_1stWordEqualsM0And2ndWordEqualsM1 , kLPI2C_AnyWordEqualsM0AndNextWordEqualsM1 , kLPI2C_1stWordAndM1EqualsM0AndM1 , kLPI2C_AnyWordAndM1EqualsM0AndM1 }
	LPI2C master data match configuration modes. More...

enum	_lpi2c_master_transfer_flags { kLPI2C_TransferDefaultFlag = 0x00U , kLPI2C_TransferNoStartFlag = 0x01U , kLPI2C_TransferRepeatedStartFlag = 0x02U , kLPI2C_TransferNoStopFlag = 0x04U }
	Transfer option flags. More...

Initialization and deinitialization
void	LPI2C_MasterGetDefaultConfig (lpi2c_master_config_t *masterConfig)
	Provides a default configuration for the LPI2C master peripheral. More...

void	LPI2C_MasterInit (LPI2C_Type base, const lpi2c_master_config_t masterConfig, uint32_t sourceClock_Hz)
	Initializes the LPI2C master peripheral. More...

void	LPI2C_MasterDeinit (LPI2C_Type *base)
	Deinitializes the LPI2C master peripheral. More...

void	LPI2C_MasterConfigureDataMatch (LPI2C_Type base, const lpi2c_data_match_config_t matchConfig)
	Configures LPI2C master data match feature. More...

status_t	LPI2C_MasterCheckAndClearError (LPI2C_Type *base, uint32_t status)
	Convert provided flags to status code, and clear any errors if present. More...

status_t	LPI2C_CheckForBusyBus (LPI2C_Type *base)
	Make sure the bus isn't already busy. More...

Bus operations
void	LPI2C_MasterSetBaudRate (LPI2C_Type *base, uint32_t sourceClock_Hz, uint32_t baudRate_Hz)
	Sets the I2C bus frequency for master transactions. More...

status_t	LPI2C_MasterStart (LPI2C_Type *base, uint8_t address, lpi2c_direction_t dir)
	Sends a START signal and slave address on the I2C bus. More...

status_t	LPI2C_MasterSend (LPI2C_Type base, void txBuff, size_t txSize)
	Performs a polling send transfer on the I2C bus. More...

status_t	LPI2C_MasterReceive (LPI2C_Type base, void rxBuff, size_t rxSize)
	Performs a polling receive transfer on the I2C bus. More...

status_t	LPI2C_MasterStop (LPI2C_Type *base)
	Sends a STOP signal on the I2C bus. More...

status_t	LPI2C_MasterTransferBlocking (LPI2C_Type base, lpi2c_master_transfer_t transfer)
	Performs a master polling transfer on the I2C bus. More...

Non-blocking
void	LPI2C_MasterTransferCreateHandle (LPI2C_Type base, lpi2c_master_handle_t handle, lpi2c_master_transfer_callback_t callback, void *userData)
	Creates a new handle for the LPI2C master non-blocking APIs. More...

status_t	LPI2C_MasterTransferNonBlocking (LPI2C_Type base, lpi2c_master_handle_t handle, lpi2c_master_transfer_t *transfer)
	Performs a non-blocking transaction on the I2C bus. More...

status_t	LPI2C_MasterTransferGetCount (LPI2C_Type base, lpi2c_master_handle_t handle, size_t *count)
	Returns number of bytes transferred so far. More...

void	LPI2C_MasterTransferAbort (LPI2C_Type base, lpi2c_master_handle_t handle)
	Terminates a non-blocking LPI2C master transmission early. More...

IRQ handler
void	LPI2C_MasterTransferHandleIRQ (LPI2C_Type base, void lpi2cMasterHandle)
	Reusable routine to handle master interrupts. More...

Detailed Description

Typedef Documentation

◆ lpi2c_master_config_t

typedef struct _lpi2c_master_config lpi2c_master_config_t

Structure with settings to initialize the LPI2C master module.

This structure holds configuration settings for the LPI2C peripheral. To initialize this structure to reasonable defaults, call the LPI2C_MasterGetDefaultConfig() function and pass a pointer to your configuration structure instance.

The configuration structure can be made constant so it resides in flash.

◆ lpi2c_master_transfer_callback_t

typedef void(* lpi2c_master_transfer_callback_t) (LPI2C_Type *base, lpi2c_master_handle_t *handle, status_t completionStatus, void *userData)

Master completion callback function pointer type.

This callback is used only for the non-blocking master transfer API. Specify the callback you wish to use in the call to LPI2C_MasterTransferCreateHandle().

Parameters

base	The LPI2C peripheral base address.
completionStatus	Either kStatus_Success or an error code describing how the transfer completed.
userData	Arbitrary pointer-sized value passed from the application.

Enumeration Type Documentation

◆ _lpi2c_data_match_config_mode

enum _lpi2c_data_match_config_mode

LPI2C master data match configuration modes.

Enumerator
kLPI2C_MatchDisabled	LPI2C Match Disabled
kLPI2C_1stWordEqualsM0OrM1	LPI2C Match Enabled and 1st data word equals MATCH0 OR MATCH1
kLPI2C_AnyWordEqualsM0OrM1	LPI2C Match Enabled and any data word equals MATCH0 OR MATCH1
kLPI2C_1stWordEqualsM0And2ndWordEqualsM1	LPI2C Match Enabled and 1st data word equals MATCH0, 2nd data equals MATCH1
kLPI2C_AnyWordEqualsM0AndNextWordEqualsM1	LPI2C Match Enabled and any data word equals MATCH0, next data equals MATCH1
kLPI2C_1stWordAndM1EqualsM0AndM1	LPI2C Match Enabled and 1st data word and MATCH0 equals MATCH0 and MATCH1
kLPI2C_AnyWordAndM1EqualsM0AndM1	LPI2C Match Enabled and any data word and MATCH0 equals MATCH0 and MATCH1

◆ _lpi2c_direction

enum _lpi2c_direction

Direction of master and slave transfers.

Enumerator
kLPI2C_Write	Master transmit.
kLPI2C_Read	Master receive.

◆ _lpi2c_host_request_polarity

enum _lpi2c_host_request_polarity

LPI2C master host request pin polarity configuration.

Enumerator
kLPI2C_HostRequestPinActiveLow	Configure the LPI2C_HREQ pin active low
kLPI2C_HostRequestPinActiveHigh	Configure the LPI2C_HREQ pin active high

◆ _lpi2c_host_request_source

enum _lpi2c_host_request_source

LPI2C master host request selection.

Enumerator
kLPI2C_HostRequestExternalPin	Select the LPI2C_HREQ pin as the host request input
kLPI2C_HostRequestInputTrigger	Select the input trigger as the host request input

◆ _lpi2c_master_flags

enum _lpi2c_master_flags

LPI2C master peripheral flags.

The following status register flags can be cleared:

All flags except kLPI2C_MasterBusyFlag and kLPI2C_MasterBusBusyFlag can be enabled as interrupts.

Note: These enums are meant to be OR'd together to form a bit mask.

Enumerator
kLPI2C_MasterTxReadyFlag	Transmit data flag
kLPI2C_MasterRxReadyFlag	Receive data flag
kLPI2C_MasterEndOfPacketFlag	End Packet flag
kLPI2C_MasterStopDetectFlag	Stop detect flag
kLPI2C_MasterNackDetectFlag	NACK detect flag
kLPI2C_MasterArbitrationLostFlag	Arbitration lost flag
kLPI2C_MasterFifoErrFlag	FIFO error flag
kLPI2C_MasterPinLowTimeoutFlag	Pin low timeout flag
kLPI2C_MasterDataMatchFlag	Data match flag
kLPI2C_MasterBusyFlag	Master busy flag
kLPI2C_MasterBusBusyFlag	Bus busy flag
kLPI2C_MasterClearFlags	All flags which are cleared by the driver upon starting a transfer.
kLPI2C_MasterIrqFlags	IRQ sources enabled by the non-blocking transactional API.
kLPI2C_MasterErrorFlags	Errors to check for.

◆ _lpi2c_master_pin_config

enum _lpi2c_master_pin_config

LPI2C pin configuration.

Enumerator
kLPI2C_2PinOpenDrain	LPI2C Configured for 2-pin open drain mode
kLPI2C_2PinOutputOnly	LPI2C Configured for 2-pin output only mode (ultra-fast mode)
kLPI2C_2PinPushPull	LPI2C Configured for 2-pin push-pull mode
kLPI2C_4PinPushPull	LPI2C Configured for 4-pin push-pull mode
kLPI2C_2PinOpenDrainWithSeparateSlave	LPI2C Configured for 2-pin open drain mode with separate LPI2C slave
kLPI2C_2PinOutputOnlyWithSeparateSlave	LPI2C Configured for 2-pin output only mode(ultra-fast mode) with separate LPI2C slave
kLPI2C_2PinPushPullWithSeparateSlave	LPI2C Configured for 2-pin push-pull mode with separate LPI2C slave
kLPI2C_4PinPushPullWithInvertedOutput	LPI2C Configured for 4-pin push-pull mode(inverted outputs)

◆ _lpi2c_master_transfer_flags

enum _lpi2c_master_transfer_flags

Transfer option flags.

Note: These enumerations are intended to be OR'd together to form a bit mask of options for the _lpi2c_master_transfer::flags field.

Enumerator
kLPI2C_TransferDefaultFlag	Transfer starts with a start signal, stops with a stop signal.
kLPI2C_TransferNoStartFlag	Don't send a start condition, address, and sub address
kLPI2C_TransferRepeatedStartFlag	Send a repeated start condition
kLPI2C_TransferNoStopFlag	Don't send a stop condition.

Function Documentation

◆ LPI2C_CheckForBusyBus()

status_t LPI2C_CheckForBusyBus ( LPI2C_Type * base )

Make sure the bus isn't already busy.

A busy bus is allowed if we are the one driving it.

Parameters

base	The LPI2C peripheral base address.

Return values

kStatus_Success
kStatus_LPI2C_Busy

◆ LPI2C_MasterCheckAndClearError()

status_t LPI2C_MasterCheckAndClearError	(	LPI2C_Type *	base,
		uint32_t	status
	)

Convert provided flags to status code, and clear any errors if present.

Parameters

base	The LPI2C peripheral base address.
status	Current status flags value that will be checked.

Return values

kStatus_Success
kStatus_LPI2C_PinLowTimeout
kStatus_LPI2C_ArbitrationLost
kStatus_LPI2C_Nak
kStatus_LPI2C_FifoError

◆ LPI2C_MasterConfigureDataMatch()

void LPI2C_MasterConfigureDataMatch	(	LPI2C_Type *	base,
		const lpi2c_data_match_config_t *	matchConfig
	)

Configures LPI2C master data match feature.

Parameters

base	The LPI2C peripheral base address.
matchConfig	Settings for the data match feature.

brief Configures LPI2C master data match feature.

param base The LPI2C peripheral base address. param matchConfig Settings for the data match feature.

◆ LPI2C_MasterDeinit()

void LPI2C_MasterDeinit ( LPI2C_Type * base )

Deinitializes the LPI2C master peripheral.

This function disables the LPI2C master peripheral and gates the clock. It also performs a software reset to restore the peripheral to reset conditions.

Parameters

base	The LPI2C peripheral base address.

brief Deinitializes the LPI2C master peripheral.

This function disables the LPI2C master peripheral and gates the clock. It also performs a software reset to restore the peripheral to reset conditions.

param base The LPI2C peripheral base address.

◆ LPI2C_MasterGetDefaultConfig()

void LPI2C_MasterGetDefaultConfig ( lpi2c_master_config_t * masterConfig )

Provides a default configuration for the LPI2C master peripheral.

This function provides the following default configuration for the LPI2C master peripheral:

masterConfig->enableMaster            = true;
masterConfig->debugEnable             = false;
masterConfig->ignoreAck               = false;
masterConfig->pinConfig               = kLPI2C_2PinOpenDrain;
masterConfig->baudRate_Hz             = 100000U;
masterConfig->busIdleTimeout_ns       = 0;
masterConfig->pinLowTimeout_ns        = 0;
masterConfig->sdaGlitchFilterWidth_ns = 0;
masterConfig->sclGlitchFilterWidth_ns = 0;
masterConfig->hostRequest.enable      = false;
masterConfig->hostRequest.source      = kLPI2C_HostRequestExternalPin;
masterConfig->hostRequest.polarity    = kLPI2C_HostRequestPinActiveHigh;

After calling this function, you can override any settings in order to customize the configuration, prior to initializing the master driver with LPI2C_MasterInit().

Parameters

[out] masterConfig User provided configuration structure for default values. Refer to lpi2c_master_config_t.

brief Provides a default configuration for the LPI2C master peripheral.

This function provides the following default configuration for the LPI2C master peripheral: code masterConfig->enableMaster = true; masterConfig->debugEnable = false; masterConfig->ignoreAck = false; masterConfig->pinConfig = kLPI2C_2PinOpenDrain; masterConfig->baudRate_Hz = 100000U; masterConfig->busIdleTimeout_ns = 0U; masterConfig->pinLowTimeout_ns = 0U; masterConfig->sdaGlitchFilterWidth_ns = 0U; masterConfig->sclGlitchFilterWidth_ns = 0U; masterConfig->hostRequest.enable = false; masterConfig->hostRequest.source = kLPI2C_HostRequestExternalPin; masterConfig->hostRequest.polarity = kLPI2C_HostRequestPinActiveHigh; endcode

After calling this function, you can override any settings in order to customize the configuration, prior to initializing the master driver with LPI2C_MasterInit().

param[out] masterConfig User provided configuration structure for default values. Refer to lpi2c_master_config_t.

◆ LPI2C_MasterInit()

void LPI2C_MasterInit	(	LPI2C_Type *	base,
		const lpi2c_master_config_t *	masterConfig,
		uint32_t	sourceClock_Hz
	)

Initializes the LPI2C master peripheral.

This function enables the peripheral clock and initializes the LPI2C master peripheral as described by the user provided configuration. A software reset is performed prior to configuration.

Parameters

base	The LPI2C peripheral base address.
masterConfig	User provided peripheral configuration. Use LPI2C_MasterGetDefaultConfig() to get a set of defaults that you can override.
sourceClock_Hz	Frequency in Hertz of the LPI2C functional clock. Used to calculate the baud rate divisors, filter widths, and timeout periods.

brief Initializes the LPI2C master peripheral.

This function enables the peripheral clock and initializes the LPI2C master peripheral as described by the user provided configuration. A software reset is performed prior to configuration.

param base The LPI2C peripheral base address. param masterConfig User provided peripheral configuration. Use LPI2C_MasterGetDefaultConfig() to get a set of defaults that you can override. param sourceClock_Hz Frequency in Hertz of the LPI2C functional clock. Used to calculate the baud rate divisors, filter widths, and timeout periods.

◆ LPI2C_MasterReceive()

status_t LPI2C_MasterReceive	(	LPI2C_Type *	base,
		void *	rxBuff,
		size_t	rxSize
	)

Performs a polling receive transfer on the I2C bus.

Parameters

base	The LPI2C peripheral base address.
rxBuff	The pointer to the data to be transferred.
rxSize	The length in bytes of the data to be transferred.

Return values

kStatus_Success	Data was received successfully.
kStatus_LPI2C_Busy	Another master is currently utilizing the bus.
kStatus_LPI2C_Nak	The slave device sent a NAK in response to a byte.
kStatus_LPI2C_FifoError	FIFO under run or overrun.
kStatus_LPI2C_ArbitrationLost	Arbitration lost error.
kStatus_LPI2C_PinLowTimeout	SCL or SDA were held low longer than the timeout.

brief Performs a polling receive transfer on the I2C bus.

param base The LPI2C peripheral base address. param rxBuff The pointer to the data to be transferred. param rxSize The length in bytes of the data to be transferred. retval kStatus_Success Data was received successfully. retval kStatus_LPI2C_Busy Another master is currently utilizing the bus. retval kStatus_LPI2C_Nak The slave device sent a NAK in response to a byte. retval kStatus_LPI2C_FifoError FIFO under run or overrun. retval kStatus_LPI2C_ArbitrationLost Arbitration lost error. retval kStatus_LPI2C_PinLowTimeout SCL or SDA were held low longer than the timeout.

◆ LPI2C_MasterSend()

status_t LPI2C_MasterSend	(	LPI2C_Type *	base,
		void *	txBuff,
		size_t	txSize
	)

Performs a polling send transfer on the I2C bus.

Sends up to txSize number of bytes to the previously addressed slave device. The slave may reply with a NAK to any byte in order to terminate the transfer early. If this happens, this function returns kStatus_LPI2C_Nak.

Parameters

base	The LPI2C peripheral base address.
txBuff	The pointer to the data to be transferred.
txSize	The length in bytes of the data to be transferred.

Return values

kStatus_Success	Data was sent successfully.
kStatus_LPI2C_Busy	Another master is currently utilizing the bus.
kStatus_LPI2C_Nak	The slave device sent a NAK in response to a byte.
kStatus_LPI2C_FifoError	FIFO under run or over run.
kStatus_LPI2C_ArbitrationLost	Arbitration lost error.
kStatus_LPI2C_PinLowTimeout	SCL or SDA were held low longer than the timeout.

brief Performs a polling send transfer on the I2C bus.

Sends up to a txSize number of bytes to the previously addressed slave device. The slave may reply with a NAK to any byte in order to terminate the transfer early. If this happens, this function returns kStatus_LPI2C_Nak.

param base The LPI2C peripheral base address. param txBuff The pointer to the data to be transferred. param txSize The length in bytes of the data to be transferred. retval kStatus_Success Data was sent successfully. retval kStatus_LPI2C_Busy Another master is currently utilizing the bus. retval kStatus_LPI2C_Nak The slave device sent a NAK in response to a byte. retval kStatus_LPI2C_FifoError FIFO under run or over run. retval kStatus_LPI2C_ArbitrationLost Arbitration lost error. retval kStatus_LPI2C_PinLowTimeout SCL or SDA were held low longer than the timeout.

◆ LPI2C_MasterSetBaudRate()

void LPI2C_MasterSetBaudRate	(	LPI2C_Type *	base,
		uint32_t	sourceClock_Hz,
		uint32_t	baudRate_Hz
	)

Sets the I2C bus frequency for master transactions.

The LPI2C master is automatically disabled and re-enabled as necessary to configure the baud rate. Do not call this function during a transfer, or the transfer is aborted.

Note: Please note that the second parameter is the clock frequency of LPI2C module, the third parameter means user configured bus baudrate, this implementation is different from other I2C drivers which use baudrate configuration as second parameter and source clock frequency as third parameter.

Parameters

base	The LPI2C peripheral base address.
sourceClock_Hz	LPI2C functional clock frequency in Hertz.
baudRate_Hz	Requested bus frequency in Hertz.

brief Sets the I2C bus frequency for master transactions.

The LPI2C master is automatically disabled and re-enabled as necessary to configure the baud rate. Do not call this function during a transfer, or the transfer is aborted.

note Please note that the second parameter is the clock frequency of LPI2C module, the third parameter means user configured bus baudrate, this implementation is different from other I2C drivers which use baudrate configuration as second parameter and source clock frequency as third parameter.

param base The LPI2C peripheral base address. param sourceClock_Hz LPI2C functional clock frequency in Hertz. param baudRate_Hz Requested bus frequency in Hertz.

◆ LPI2C_MasterStart()

status_t LPI2C_MasterStart	(	LPI2C_Type *	base,
		uint8_t	address,
		lpi2c_direction_t	dir
	)

Sends a START signal and slave address on the I2C bus.

This function is used to initiate a new master mode transfer. First, the bus state is checked to ensure that another master is not occupying the bus. Then a START signal is transmitted, followed by the 7-bit address specified in the address parameter. Note that this function does not actually wait until the START and address are successfully sent on the bus before returning.

Parameters

base	The LPI2C peripheral base address.
address	7-bit slave device address, in bits [6:0].
dir	Master transfer direction, either kLPI2C_Read or kLPI2C_Write. This parameter is used to set the R/w bit (bit 0) in the transmitted slave address.

Return values

kStatus_Success	START signal and address were successfully enqueued in the transmit FIFO.
kStatus_LPI2C_Busy	Another master is currently utilizing the bus.

brief Sends a START signal and slave address on the I2C bus.

This function is used to initiate a new master mode transfer. First, the bus state is checked to ensure that another master is not occupying the bus. Then a START signal is transmitted, followed by the 7-bit address specified in the a address parameter. Note that this function does not actually wait until the START and address are successfully sent on the bus before returning.

param base The LPI2C peripheral base address. param address 7-bit slave device address, in bits [6:0]. param dir Master transfer direction, either kLPI2C_Read or kLPI2C_Write. This parameter is used to set the R/w bit (bit 0) in the transmitted slave address. retval kStatus_Success START signal and address were successfully enqueued in the transmit FIFO. retval kStatus_LPI2C_Busy Another master is currently utilizing the bus.

◆ LPI2C_MasterStop()

status_t LPI2C_MasterStop ( LPI2C_Type * base )

Sends a STOP signal on the I2C bus.

This function does not return until the STOP signal is seen on the bus, or an error occurs.

Parameters

base	The LPI2C peripheral base address.

Return values

kStatus_Success	The STOP signal was successfully sent on the bus and the transaction terminated.
kStatus_LPI2C_Busy	Another master is currently utilizing the bus.
kStatus_LPI2C_Nak	The slave device sent a NAK in response to a byte.
kStatus_LPI2C_FifoError	FIFO under run or overrun.
kStatus_LPI2C_ArbitrationLost	Arbitration lost error.
kStatus_LPI2C_PinLowTimeout	SCL or SDA were held low longer than the timeout.

brief Sends a STOP signal on the I2C bus.

This function does not return until the STOP signal is seen on the bus, or an error occurs.

param base The LPI2C peripheral base address. retval kStatus_Success The STOP signal was successfully sent on the bus and the transaction terminated. retval kStatus_LPI2C_Busy Another master is currently utilizing the bus. retval kStatus_LPI2C_Nak The slave device sent a NAK in response to a byte. retval kStatus_LPI2C_FifoError FIFO under run or overrun. retval kStatus_LPI2C_ArbitrationLost Arbitration lost error. retval kStatus_LPI2C_PinLowTimeout SCL or SDA were held low longer than the timeout.

◆ LPI2C_MasterTransferAbort()

void LPI2C_MasterTransferAbort	(	LPI2C_Type *	base,
		lpi2c_master_handle_t *	handle
	)

Terminates a non-blocking LPI2C master transmission early.

Note: It is not safe to call this function from an IRQ handler that has a higher priority than the LPI2C peripheral's IRQ priority.

Parameters

base	The LPI2C peripheral base address.
handle	Pointer to the LPI2C master driver handle.

Return values

kStatus_Success	A transaction was successfully aborted.
kStatus_LPI2C_Idle	There is not a non-blocking transaction currently in progress.

brief Terminates a non-blocking LPI2C master transmission early.

note It is not safe to call this function from an IRQ handler that has a higher priority than the LPI2C peripheral's IRQ priority.

param base The LPI2C peripheral base address. param handle Pointer to the LPI2C master driver handle. retval kStatus_Success A transaction was successfully aborted. retval kStatus_LPI2C_Idle There is not a non-blocking transaction currently in progress.

◆ LPI2C_MasterTransferBlocking()

status_t LPI2C_MasterTransferBlocking	(	LPI2C_Type *	base,
		lpi2c_master_transfer_t *	transfer
	)

Performs a master polling transfer on the I2C bus.

Note: The API does not return until the transfer succeeds or fails due to error happens during transfer.

Parameters

base	The LPI2C peripheral base address.
transfer	Pointer to the transfer structure.

Return values

kStatus_Success	Data was received successfully.
kStatus_LPI2C_Busy	Another master is currently utilizing the bus.
kStatus_LPI2C_Nak	The slave device sent a NAK in response to a byte.
kStatus_LPI2C_FifoError	FIFO under run or overrun.
kStatus_LPI2C_ArbitrationLost	Arbitration lost error.
kStatus_LPI2C_PinLowTimeout	SCL or SDA were held low longer than the timeout.

brief Performs a master polling transfer on the I2C bus.

note The API does not return until the transfer succeeds or fails due to error happens during transfer.

param base The LPI2C peripheral base address. param transfer Pointer to the transfer structure. retval kStatus_Success Data was received successfully. retval kStatus_LPI2C_Busy Another master is currently utilizing the bus. retval kStatus_LPI2C_Nak The slave device sent a NAK in response to a byte. retval kStatus_LPI2C_FifoError FIFO under run or overrun. retval kStatus_LPI2C_ArbitrationLost Arbitration lost error. retval kStatus_LPI2C_PinLowTimeout SCL or SDA were held low longer than the timeout.

◆ LPI2C_MasterTransferCreateHandle()

void LPI2C_MasterTransferCreateHandle	(	LPI2C_Type *	base,
		lpi2c_master_handle_t *	handle,
		lpi2c_master_transfer_callback_t	callback,
		void *	userData
	)

Creates a new handle for the LPI2C master non-blocking APIs.

The creation of a handle is for use with the non-blocking APIs. Once a handle is created, there is not a corresponding destroy handle. If the user wants to terminate a transfer, the LPI2C_MasterTransferAbort() API shall be called.

Note: The function also enables the NVIC IRQ for the input LPI2C. Need to notice that on some SoCs the LPI2C IRQ is connected to INTMUX, in this case user needs to enable the associated INTMUX IRQ in application.

Parameters

	base	The LPI2C peripheral base address.
[out]	handle	Pointer to the LPI2C master driver handle.
	callback	User provided pointer to the asynchronous callback function.
	userData	User provided pointer to the application callback data.

brief Creates a new handle for the LPI2C master non-blocking APIs.

The creation of a handle is for use with the non-blocking APIs. Once a handle is created, there is not a corresponding destroy handle. If the user wants to terminate a transfer, the LPI2C_MasterTransferAbort() API shall be called.

note The function also enables the NVIC IRQ for the input LPI2C. Need to notice that on some SoCs the LPI2C IRQ is connected to INTMUX, in this case user needs to enable the associated INTMUX IRQ in application.

param base The LPI2C peripheral base address. param[out] handle Pointer to the LPI2C master driver handle. param callback User provided pointer to the asynchronous callback function. param userData User provided pointer to the application callback data.

◆ LPI2C_MasterTransferGetCount()

status_t LPI2C_MasterTransferGetCount	(	LPI2C_Type *	base,
		lpi2c_master_handle_t *	handle,
		size_t *	count
	)

Returns number of bytes transferred so far.

Parameters

	base	The LPI2C peripheral base address.
	handle	Pointer to the LPI2C master driver handle.
[out]	count	Number of bytes transferred so far by the non-blocking transaction.

Return values

kStatus_Success
kStatus_NoTransferInProgress	There is not a non-blocking transaction currently in progress.

brief Returns number of bytes transferred so far. param base The LPI2C peripheral base address. param handle Pointer to the LPI2C master driver handle. param[out] count Number of bytes transferred so far by the non-blocking transaction. retval kStatus_Success retval kStatus_NoTransferInProgress There is not a non-blocking transaction currently in progress.

◆ LPI2C_MasterTransferHandleIRQ()

void LPI2C_MasterTransferHandleIRQ	(	LPI2C_Type *	base,
		void *	lpi2cMasterHandle
	)

Reusable routine to handle master interrupts.

Note: This function does not need to be called unless you are reimplementing the nonblocking API's interrupt handler routines to add special functionality.

Parameters

base	The LPI2C peripheral base address.
lpi2cMasterHandle	Pointer to the LPI2C master driver handle.

brief Reusable routine to handle master interrupts. note This function does not need to be called unless you are reimplementing the nonblocking API's interrupt handler routines to add special functionality. param base The LPI2C peripheral base address. param lpi2cMasterHandle Pointer to the LPI2C master driver handle.

◆ LPI2C_MasterTransferNonBlocking()

status_t LPI2C_MasterTransferNonBlocking	(	LPI2C_Type *	base,
		lpi2c_master_handle_t *	handle,
		lpi2c_master_transfer_t *	transfer
	)

Performs a non-blocking transaction on the I2C bus.

Parameters

base	The LPI2C peripheral base address.
handle	Pointer to the LPI2C master driver handle.
transfer	The pointer to the transfer descriptor.

Return values

kStatus_Success	The transaction was started successfully.
kStatus_LPI2C_Busy	Either another master is currently utilizing the bus, or a non-blocking transaction is already in progress.

brief Performs a non-blocking transaction on the I2C bus.

param base The LPI2C peripheral base address. param handle Pointer to the LPI2C master driver handle. param transfer The pointer to the transfer descriptor. retval kStatus_Success The transaction was started successfully. retval kStatus_LPI2C_Busy Either another master is currently utilizing the bus, or a non-blocking transaction is already in progress.

Modules

Data Structures

Typedefs

Enumerations

Initialization and deinitialization

Bus operations

Non-blocking

IRQ handler

Detailed Description

Typedef Documentation

◆ lpi2c_master_config_t

◆ lpi2c_master_transfer_callback_t

Enumeration Type Documentation

◆ _lpi2c_data_match_config_mode

◆ _lpi2c_direction

◆ _lpi2c_host_request_polarity

◆ _lpi2c_host_request_source

◆ _lpi2c_master_flags

◆ _lpi2c_master_pin_config

◆ _lpi2c_master_transfer_flags

Function Documentation

◆ LPI2C_CheckForBusyBus()

◆ LPI2C_MasterCheckAndClearError()

◆ LPI2C_MasterConfigureDataMatch()

◆ LPI2C_MasterDeinit()

◆ LPI2C_MasterGetDefaultConfig()

◆ LPI2C_MasterInit()

◆ LPI2C_MasterReceive()

◆ LPI2C_MasterSend()

◆ LPI2C_MasterSetBaudRate()

◆ LPI2C_MasterStart()

◆ LPI2C_MasterStop()

◆ LPI2C_MasterTransferAbort()

◆ LPI2C_MasterTransferBlocking()

◆ LPI2C_MasterTransferCreateHandle()

◆ LPI2C_MasterTransferGetCount()

◆ LPI2C_MasterTransferHandleIRQ()

◆ LPI2C_MasterTransferNonBlocking()