Public function

Functions
void	i2cmux4_cfg_setup (i2cmux4_cfg_t *cfg)
	Config Object Initialization function.
I2CMUX4_RETVAL	i2cmux4_init (i2cmux4_t *ctx, i2cmux4_cfg_t *cfg)
	Initialization function.
void	i2cmux4_generic_write (i2cmux4_t *ctx, uint8_t reg, uint8_t *data_buf, uint8_t len)
	Generic write function.
void	i2cmux4_generic_read (i2cmux4_t *ctx, uint8_t reg, uint8_t *data_buf, uint8_t len)
	Generic read function.
void	i2cmux4_power_on (i2cmux4_t *ctx, uint8_t enable)
	Power On function.
void	i2cmux4_hw_reset (i2cmux4_t *ctx)
	Hardware reset function.
void	i2cmux4_write_cmd (i2cmux4_t *ctx, uint8_t cmd_data)
	Write command function.
uint8_t	i2cmux4_read_cmd (i2cmux4_t *ctx)
	Read command function.
void	i2cmux4_set_channel (i2cmux4_t *ctx, uint8_t sel_ch, uint8_t ch_slave_addr)
	Set channel function.
uint8_t	i2cmux4_get_ch_interrupt (i2cmux4_t *ctx)
	Get channel interrupt function.
void	i2cmux4_rmt_write_bytes (i2cmux4_t *ctx, uint8_t reg, uint8_t *p_tx_data, uint8_t n_bytes)
	Generic rmt write data function.
void	i2cmux4_rmt_read_bytes (i2cmux4_t *ctx, uint8_t reg, uint8_t *p_rx_data, uint8_t n_bytes)
	Generic read data function.
uint8_t	i2cmux4_check_int (i2cmux4_t *ctx)
	Check interrupt function.

Detailed Description

Function Documentation

i2cmux4_cfg_setup()

void i2cmux4_cfg_setup

(

i2cmux4_cfg_t *

cfg

)

Config Object Initialization function.

Parameters

cfg	Click configuration structure.

@description This function initializes click configuration structure to init state.

Note

All used pins will be set to unconnected state.

i2cmux4_check_int()

uint8_t i2cmux4_check_int

(

i2cmux4_t *

ctx

)

Check interrupt function.

Parameters

ctx	Click object.

Returns

state of the INT pin.

@description The function get INT pin state of I2C MUX 4 click board.

i2cmux4_generic_read()

void i2cmux4_generic_read	(	i2cmux4_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

@description This function reads data from the desired register.

i2cmux4_generic_write()

void i2cmux4_generic_write	(	i2cmux4_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.

@description This function writes data to the desired register.

i2cmux4_get_ch_interrupt()

uint8_t i2cmux4_get_ch_interrupt

(

i2cmux4_t *

ctx

)

Get channel interrupt function.

Parameters

ctx	Click object.

Returns

channel interrupt bit

@description The function get channel interrupt of the I2C MUX 4 click board.

i2cmux4_hw_reset()

void i2cmux4_hw_reset

(

i2cmux4_t *

ctx

)

Hardware reset function.

Parameters

ctx	Click object.

@description The function hardware reset I2C MUX 4 click board by cleared to '0' state of the RST pin, wait the 100 ms, sets to '1' state of the RST pin and wait another the 100 ms.

i2cmux4_init()

I2CMUX4_RETVAL i2cmux4_init	(	i2cmux4_t *	ctx,
		i2cmux4_cfg_t *	cfg )

Initialization function.

Parameters

i2cmux4	Click object.
cfg	Click configuration structure.

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

i2cmux4_power_on()

void i2cmux4_power_on	(	i2cmux4_t *	ctx,
		uint8_t	enable )

Power On function.

Parameters

ctx	Click object.

@description The function enable or disable the I2C MUX 4 click board by set to '1' or cleared to '0' state of the RST pin.

i2cmux4_read_cmd()

uint8_t i2cmux4_read_cmd

(

i2cmux4_t *

ctx

)

Read command function.

Parameters

ctx	Click object.

Returns

8-bit read data.

Function executes read command from the TCA9543A Low Voltage 2-Channel I2C Bus Switch With Interrupt Logic And Reset on the I2C MUX 4 click board.

i2cmux4_rmt_read_bytes()

void i2cmux4_rmt_read_bytes	(	i2cmux4_t *	ctx,
		uint8_t	reg,
		uint8_t *	p_rx_data,
		uint8_t	n_bytes )

Generic read data function.

Parameters

ctx	Click object.
reg	8-bit register address.
p_rx_data	pointer to the memory location where data be stored.
n_bytes	number of bytes to be read.

@description The function read a sequential data starting from the targeted 8-bit register address of register address of the device connected to the desired channel of the I2C MUX 4 click board.

i2cmux4_rmt_write_bytes()

void i2cmux4_rmt_write_bytes	(	i2cmux4_t *	ctx,
		uint8_t	reg,
		uint8_t *	p_tx_data,
		uint8_t	n_bytes )

Generic rmt write data function.

Parameters

ctx	Click object.
reg	8-bit register address.
p_tx_data	pointer to the data to be written.
n_bytes	number of bytes to be written.

@description The function writes a sequential data starting to the targeted 8-bit register address of the device connected to the desired channel of the I2C MUX 4 click board.

i2cmux4_set_channel()

void i2cmux4_set_channel	(	i2cmux4_t *	ctx,
		uint8_t	sel_ch,
		uint8_t	ch_slave_addr )

Set channel function.

Parameters

ctx	Click object.
sel_ch	select channel: 0x00 ( I2CMUX4_SEL_CH_ALL_DISABLE ) : No channel selected; power-up/reset default state. 0x01 ( I2CMUX4_SEL_CH_0 ) : Channel 0 enabled. 0x02 ( I2CMUX4_SEL_CH_1 ) : Channel 1 enabled.
ch_slave_addr	7-bit i2c slave address of the device connected to the selected channel.

@description The function sets channel and slave address of the device connected to the selected channel of the I2C MUX 4 click board.

i2cmux4_write_cmd()

void i2cmux4_write_cmd	(	i2cmux4_t *	ctx,
		uint8_t	cmd_data )

Write command function.

Parameters

ctx	Click object.
cmd_data	8-bit command data to be transmitted.

@description The function executes writes command to the TCA9543A Low Voltage 2-Channel I2C Bus Switch With Interrupt Logic And Reset on the I2C MUX 4 click board.