I2C API

Data Structures
struct	TEES_I2CTransfer
	I2C data transfer buffer. More...

Typedefs
typedef struct __TEES_I2CHandlerImpl *	TEES_I2CHandler

Functions
TEE_Result	TEES_I2CInit (const char *name, uint32_t transac_len, TEES_I2CHandler *handler)
	Initialize I2C device and set transfer parameters to handler. More...
TEE_Result	TEES_I2CExit (TEES_I2CHandler handler)
	Terminate connection to I2C device. More...
TEE_Result	TEES_I2CWrite (TEES_I2CHandler handler, uint8_t chip, TEES_I2CTransfer *tx)
	Write data buffer tx to initialized I2C device. More...
TEE_Result	TEES_I2CRead (TEES_I2CHandler handler, uint8_t chip, TEES_I2CTransfer *rx)
	Read data buffer rx from initialized I2C device. More...
TEE_Result	TEES_I2CWriteRead (TEES_I2CHandler handler, uint8_t chip, TEES_I2CTransfer *tx, TEES_I2CTransfer *rx)
	Write data buffer tx and read buffer rx from initialized I2C device at the same time. More...

Detailed Description

Provides set of functions to manipulate device connected with I2C bus.

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Data Structure Documentation

struct TEES_I2CTransfer

I2C data transfer buffer.

Data Fields
void *	buf	pointer to buffer used for I2C data transfer.
size_t	len	size of buffer buf.

Typedef Documentation

TEES_I2CHandler

#include <tee_i2c.h>

Handler for I2C device.

Function Documentation

TEE_Result TEES_I2CExit

(

TEES_I2CHandler

handler

)

#include <tee_i2c.h>

Terminate connection to I2C device.

Parameters

[in]

handler

initialized parameters.

Return values

TEE_SUCCESS	in case of success.
TEE_ERROR_xxx	in case of errors.

TEE_Result TEES_I2CInit	(	const char *	name,
		uint32_t	transac_len,
		TEES_I2CHandler *	handler
	)

#include <tee_i2c.h>

Initialize I2C device and set transfer parameters to handler.

Parameters

[in]	name	interface name.
[in]	transac_len	size of transaction.
[out]	handler	Pointer to structure which contains set up parameters.

Return values

TEE_SUCCESS	in case of success.
TEE_ERROR_xxx	in case of errors.

TEE_Result TEES_I2CRead	(	TEES_I2CHandler	handler,
		uint8_t	chip,
		TEES_I2CTransfer *	rx
	)

#include <tee_i2c.h>

Read data buffer rx from initialized I2C device.

Parameters

[in]	handler	initialized parameters.
[in]	chip	address of target device on I2C bus.
[out]	rx	Pointer to buffer to receive.

Return values

TEE_SUCCESS	in case of success.
TEE_ERROR_xxx	in case of errors.

TEE_Result TEES_I2CWrite	(	TEES_I2CHandler	handler,
		uint8_t	chip,
		TEES_I2CTransfer *	tx
	)

#include <tee_i2c.h>

Write data buffer tx to initialized I2C device.

Parameters

[in]	handler	initialized parameters.
[in]	chip	address of target device on I2C bus.
[in]	tx	Pointer to buffer to transfer.

Return values

TEE_SUCCESS	in case of success.
TEE_ERROR_xxx	in case of errors.

TEE_Result TEES_I2CWriteRead	(	TEES_I2CHandler	handler,
		uint8_t	chip,
		TEES_I2CTransfer *	tx,
		TEES_I2CTransfer *	rx
	)

#include <tee_i2c.h>

Write data buffer tx and read buffer rx from initialized I2C device at the same time.

Parameters

[in]	handler	initialized parameters.
[in]	chip	address of target device on I2C bus.
[in]	tx	Pointer to buffer to transfer.
[out]	rx	Pointer to buffer to receive.

Return values

TEE_SUCCESS	in case of success.
TEE_ERROR_xxx	in case of errors.