Public function

Functions
void	i2cmux2_cfg_setup (i2cmux2_cfg_t *cfg)
	Config Object Initialization function.
err_t	i2cmux2_init (i2cmux2_t *ctx, i2cmux2_cfg_t *cfg)
	Initialization function.
void	i2cmux2_generic_write (i2cmux2_t *ctx, uint8_t reg, uint8_t *data_buf, uint8_t len)
	Generic write function.
void	i2cmux2_generic_read (i2cmux2_t *ctx, uint8_t reg, uint8_t *data_buf, uint8_t len)
	Generic read function.
void	i2cmux2_hw_reset (i2cmux2_t *ctx)
	Hardware reset function.
void	i2cmux2_write_cmd (i2cmux2_t *ctx, uint8_t tx_data)
	Write command function.
uint8_t	i2cmux2_read_cmd (i2cmux2_t *ctx)
	Read command function.
void	i2cmux2_set_channel (i2cmux2_t *ctx, uint8_t channel, uint8_t ch_slave_address)
	Set channel function.
uint8_t	i2cmux2_read_interrupt (i2cmux2_t *ctx)
	Read interrupt status function.
uint8_t	i2cmux2_check_int (i2cmux2_t *ctx)
	Check interrupt status function.

Detailed Description

Function Documentation

i2cmux2_cfg_setup()

void i2cmux2_cfg_setup

(

i2cmux2_cfg_t *

cfg

)

Config Object Initialization function.

Parameters

cfg	Click configuration structure.

This function initializes click configuration structure to init state.

Note

All used pins will be set to unconnected state.

i2cmux2_check_int()

uint8_t i2cmux2_check_int

(

i2cmux2_t *

ctx

)

Check interrupt status function.

Parameters

ctx	Click object.

Returns

Interrupt pin state:

• 0 : Active;

• 1 : Not active;

  Function check interrupt state by returning the state of the INT pin of I2C MUX 2 click board.

i2cmux2_generic_read()

void i2cmux2_generic_read	(	i2cmux2_t *	ctx,
		uint8_t	reg,
		uint8_t *	data_buf,
		uint8_t	len )

Generic read function.

Parameters

ctx	Click object.
reg	Register address.
data_buf	Output data buf
len	Number of the bytes to be read

This function reads data from the desired register.

i2cmux2_generic_write()

void i2cmux2_generic_write	(	i2cmux2_t *	ctx,
		uint8_t	reg,
		uint8_t *	data_buf,
		uint8_t	len )

Generic write function.

Parameters

ctx	Click object.
reg	Register address.
data_buf	Data buf to be written.
len	Number of the bytes in data buf.

This function writes data to the desired register.

i2cmux2_hw_reset()

void i2cmux2_hw_reset

(

i2cmux2_t *

ctx

)

Hardware reset function.

Parameters

ctx	Click object.

This function resets I2C MUX 2 click board by clearing the RST pin for 100ms.

i2cmux2_init()

err_t i2cmux2_init	(	i2cmux2_t *	ctx,
		i2cmux2_cfg_t *	cfg )

Initialization function.

Parameters

ctx	Click object.
cfg	Click configuration structure.

This function initializes all necessary pins and peripherals used for this click.

i2cmux2_read_cmd()

uint8_t i2cmux2_read_cmd

(

i2cmux2_t *

ctx

)

Read command function.

Parameters

ctx	Click object.

Returns

8-bit read data.

Function executes read command from the TCA9545A Low Voltage 4-Channel I2C on the I2C MUX 2 click board.

i2cmux2_read_interrupt()

uint8_t i2cmux2_read_interrupt

(

i2cmux2_t *

ctx

)

Read interrupt status function.

Parameters

ctx	Click object.

Returns

Interrupt of channel state:

• [ bit 0 ] : Interrupt on channel 0;
• [ bit 1 ] : Interrupt on channel 1;
• [ bit 2 ] : Interrupt on channel 2;

• [ bit 3 ] : Interrupt on channel 3;

  Function get interrupt status by reading from the TCA9545A Low Voltage 4-Channel I2C on the I2C MUX 2 click board.

i2cmux2_set_channel()

void i2cmux2_set_channel	(	i2cmux2_t *	ctx,
		uint8_t	channel,
		uint8_t	ch_slave_address )

Set channel function.

Parameters

ctx	Click object.
channel	8-bit register address.
ch_slave_address	pointer to the data to be written.

Function sets channel of the I2C MUX 2 click board.

i2cmux2_write_cmd()

void i2cmux2_write_cmd	(	i2cmux2_t *	ctx,
		uint8_t	tx_data )

Write command function.

Parameters

ctx	Click object.
tx_data	8-bit data to be transmitted.

Function executes writes command to the TCA9545A Low Voltage 4-Channel I2C on the I2C MUX 2 click board.