LPI2C: Low Power Inter-Integrated Circuit Driver

Overview

Modules
	LPI2C CMSIS Driver
	LPI2C FreeRTOS Driver
	LPI2C Master DMA Driver
	LPI2C Master Driver
	LPI2C Slave Driver

Macros
#define	I2C_RETRY_TIMES   0U /* Define to zero means keep waiting until the flag is assert/deassert. */
	Retry times for waiting flag. More...

Enumerations
enum	{   kStatus_LPI2C_Busy = MAKE_STATUS(kStatusGroup_LPI2C, 0),   kStatus_LPI2C_Idle = MAKE_STATUS(kStatusGroup_LPI2C, 1),   kStatus_LPI2C_Nak = MAKE_STATUS(kStatusGroup_LPI2C, 2),   kStatus_LPI2C_FifoError = MAKE_STATUS(kStatusGroup_LPI2C, 3),   kStatus_LPI2C_BitError = MAKE_STATUS(kStatusGroup_LPI2C, 4),   kStatus_LPI2C_ArbitrationLost = MAKE_STATUS(kStatusGroup_LPI2C, 5),   kStatus_LPI2C_PinLowTimeout,   kStatus_LPI2C_NoTransferInProgress,   kStatus_LPI2C_DmaRequestFail = MAKE_STATUS(kStatusGroup_LPI2C, 8),   kStatus_LPI2C_Timeout = MAKE_STATUS(kStatusGroup_LPI2C, 9) }
	LPI2C status return codes. More...

Functions
uint32_t	LPI2C_GetInstance (LPI2C_Type *base)
	Returns an instance number given a base address. More...

Variables
IRQn_Type const	kLpi2cIrqs []
	Array to map LPI2C instance number to IRQ number, used internally for LPI2C master interrupt and EDMA transactional APIs. More...
lpi2c_master_isr_t	s_lpi2cMasterIsr
	Pointer to master IRQ handler for each instance, used internally for LPI2C master interrupt and EDMA transactional APIs. More...
void *	s_lpi2cMasterHandle []
	Pointers to master handles for each instance, used internally for LPI2C master interrupt and EDMA transactional APIs. More...

Driver version
#define	FSL_LPI2C_DRIVER_VERSION   (MAKE_VERSION(2, 5, 2))
	LPI2C driver version. More...

Macro Definition Documentation

#define FSL_LPI2C_DRIVER_VERSION   (MAKE_VERSION(2, 5, 2))

#define I2C_RETRY_TIMES   0U /* Define to zero means keep waiting until the flag is assert/deassert. */

Enumeration Type Documentation

anonymous enum

Enumerator
kStatus_LPI2C_Busy	The master is already performing a transfer.
kStatus_LPI2C_Idle	The slave driver is idle.
kStatus_LPI2C_Nak	The slave device sent a NAK in response to a byte.
kStatus_LPI2C_FifoError	FIFO under run or overrun.
kStatus_LPI2C_BitError	Transferred bit was not seen on the bus.
kStatus_LPI2C_ArbitrationLost	Arbitration lost error.
kStatus_LPI2C_PinLowTimeout	SCL or SDA were held low longer than the timeout.
kStatus_LPI2C_NoTransferInProgress	Attempt to abort a transfer when one is not in progress.
kStatus_LPI2C_DmaRequestFail	DMA request failed.
kStatus_LPI2C_Timeout	Timeout polling status flags.

Function Documentation

uint32_t LPI2C_GetInstance

(

LPI2C_Type *

base

)

If an invalid base address is passed, debug builds will assert. Release builds will just return instance number 0.

Parameters

base	The LPI2C peripheral base address.

Returns

LPI2C instance number starting from 0.

Variable Documentation

IRQn_Type const kLpi2cIrqs[]

lpi2c_master_isr_t s_lpi2cMasterIsr

void* s_lpi2cMasterHandle[]