Public function

Functions
void	expand7_cfg_setup (expand7_cfg_t *cfg)
	Config Object Initialization function.
err_t	expand7_init (expand7_t *ctx, expand7_cfg_t *cfg)
	Initialization function.
void	expand7_generic_write (expand7_t *ctx, uint8_t reg, uint8_t *data_buf, uint8_t len)
	Generic write function.
void	expand7_generic_read (expand7_t *ctx, uint8_t reg, uint8_t *data_buf, uint8_t len)
	Generic read function.
void	expand7_write_byte (expand7_t *ctx, uint8_t reg_adr, uint8_t wr_data)
	Write byte function.
uint8_t	expand7_read_byte (expand7_t *ctx, uint8_t reg_adr)
	Read byte function.
void	expand7_write_port_exp (expand7_t *ctx, uint8_t reg, uint8_t *buf, uint8_t len)
	Port Expander Write function.
void	expand7_read_port_exp (expand7_t *ctx, uint8_t reg, uint8_t *buf, uint8_t len)
	Port Expander Read function.
void	expand7_send_eeprom_cmd (expand7_t *ctx, uint8_t cmd)
	Send Command function.
void	expand7_write_eeprom (expand7_t *ctx, uint16_t mem_adr, uint8_t *buf, uint8_t len)
	EEPROM Write function.
void	expand7_read_eeprom (expand7_t *ctx, uint16_t mem_adr, uint8_t *buf, uint8_t len)
	EEPROM Read function.
uint8_t	expand7_read_bit (expand7_t *ctx, uint8_t reg_adr, uint8_t bit_num)
	Read bit function.
void	expand7_write_bit (expand7_t *ctx, uint8_t reg_adr, uint8_t bit_num, uint8_t pin_val)
	Write bit function.
uint8_t	expand7_read_pin (expand7_t *ctx, uint8_t pin, uint8_t inv)
	Get a single INPUT pin's logic level function.
uint8_t	expand7_read_port (expand7_t *ctx, uint8_t port, uint8_t inv)
	Get all pin logic levels from one port function.
uint8_t	expand7_get_pin_out_lvl (expand7_t *ctx, uint8_t pin)
	Get a single OUTPUT pin's setting function.
uint8_t	expand7_get_port_out_lvl (expand7_t *ctx, uint8_t port)
	Get all pin output settings from one port function.
void	expand7_write_pin (expand7_t *ctx, uint8_t pin, uint8_t pin_val)
	Set a single OUTPUT pin's logic level function.
void	expand7_write_port (expand7_t *ctx, uint8_t port, uint8_t value)
	Set all OUTPUT pins' logic levels in one port function.
void	expand7_write_all (expand7_t *ctx, uint8_t value)
	Set all OUTPUT pins' logic levels function.
void	expand7_sel_pwm_pin (expand7_t *ctx, uint8_t pin, uint8_t pwm_en)
	Select a PWM output pin function.
void	expand7_pwm_cfg (expand7_t *ctx, expand7_pwm_cfg_t pwm_cfg, float *duty_cyc, float *freq)
	PWM Configuration function.
void	expand7_eeprom_enable (expand7_t *ctx, uint8_t cmd)
	Enable Register Configuration function.
void	expand7_reset (expand7_t *ctx)
	Reset function.
uint8_t	expand7_check_int (expand7_t *ctx)
	Get Interrupt state function.

Detailed Description

Function Documentation

expand7_cfg_setup()

void expand7_cfg_setup

(

expand7_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.

expand7_check_int()

uint8_t expand7_check_int

(

expand7_t *

ctx

)

Get Interrupt state function.

Parameters

ctx	Click object.

Returns

• 0 : Interrupt has not occured
• 1 : Interrupt has occured

Function is used to check if an interrupt has occured.

expand7_eeprom_enable()

void expand7_eeprom_enable	(	expand7_t *	ctx,
		uint8_t	cmd )

Enable Register Configuration function.

Parameters

ctx	Click object.
cmd	value that represents input data to Enable Register

Function is used to write to Enable Register.

Note

Writes to this register differ from other registers, consult datasheet for further information.

expand7_generic_read()

void expand7_generic_read	(	expand7_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.

expand7_generic_write()

void expand7_generic_write	(	expand7_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.

expand7_get_pin_out_lvl()

uint8_t expand7_get_pin_out_lvl	(	expand7_t *	ctx,
		uint8_t	pin )

Get a single OUTPUT pin's setting function.

Parameters

ctx	Click object.
pin	8-bit value that defines the specific pin

Returns

Pin output setting (0 or 1)

Function is used to get a single OUTPUT pin's setting.

expand7_get_port_out_lvl()

uint8_t expand7_get_port_out_lvl	(	expand7_t *	ctx,
		uint8_t	port )

Get all pin output settings from one port function.

Parameters

ctx	Click object.
port	8-bit value that defines the port

Returns

Pin output setting (0 or 1)

Function is used to get all pin output settings from one port.

expand7_init()

err_t expand7_init	(	expand7_t *	ctx,
		expand7_cfg_t *	cfg )

Initialization function.

Parameters

expand7	Click object.
cfg	Click configuration structure.

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

expand7_pwm_cfg()

void expand7_pwm_cfg	(	expand7_t *	ctx,
		expand7_pwm_cfg_t	pwm_cfg,
		float *	duty_cyc,
		float *	freq )

PWM Configuration function.

Parameters

ctx	Click object.
expand7_pwm_cfg_t	structure where PWM Configuration data are stored.
duty_cyc	float value representing PWM duty cycle
freq	float value representing output frequency

Function is used to configure PWM output.

expand7_read_bit()

uint8_t expand7_read_bit	(	expand7_t *	ctx,
		uint8_t	reg_adr,
		uint8_t	bit_num )

Read bit function.

Parameters

ctx	Click object.
reg_adr	8-bit value that defines the register
bit_num	8-bit value that defines the specific bit

Returns

8-bit value that represents the specific bit's value

Function is used to read state of a single bit of data from user defined register.

expand7_read_byte()

uint8_t expand7_read_byte	(	expand7_t *	ctx,
		uint8_t	reg_adr )

Read byte function.

Parameters

ctx	Click object.
reg_adr	8-bit value that defines the register

Returns

rx_buf 8-bit value that defines the output data

Function is used to read single byte of data from user defined register.

expand7_read_eeprom()

void expand7_read_eeprom	(	expand7_t *	ctx,
		uint16_t	mem_adr,
		uint8_t *	buf,
		uint8_t	len )

EEPROM Read function.

Parameters

ctx	Click object.
reg	8-bit register address
buf	8-bit read data
len	8-bit number of bytes

Reads user defined number of bytes from EEPROM defined by 8-bit address

expand7_read_pin()

uint8_t expand7_read_pin	(	expand7_t *	ctx,
		uint8_t	pin,
		uint8_t	inv )

Get a single INPUT pin's logic level function.

Parameters

ctx	Click object.
pin	16-bit value that defines the specific pin

Returns

8-bit value that represents the specific pin's state

Function is used to read the state of a defined pin.

expand7_read_port()

uint8_t expand7_read_port	(	expand7_t *	ctx,
		uint8_t	port,
		uint8_t	inv )

Get all pin logic levels from one port function.

Parameters

ctx	Click object.
port	8-bit value that defines the port

Returns

8-bit value that represents the states of pins in selected port.

Function is used to read the states of pins in selected port.

expand7_read_port_exp()

void expand7_read_port_exp	(	expand7_t *	ctx,
		uint8_t	reg,
		uint8_t *	buf,
		uint8_t	len )

Port Expander Read function.

Parameters

ctx	Click object.
reg	8-bit register address
buf	8-bit read data
len	8-bit number of bytes

Reads user defined number of bytes from registers defined by 8-bit register address

expand7_reset()

void expand7_reset

(

expand7_t *

ctx

)

Reset function.

Parameters

ctx	Click object.

Function is used to reset the device.

Note

Functon holds two 100 ms reset delays.

expand7_sel_pwm_pin()

void expand7_sel_pwm_pin	(	expand7_t *	ctx,
		uint8_t	pin,
		uint8_t	pwm_en )

Select a PWM output pin function.

Parameters

ctx	Click object.
port	8-bit value that defines PWM output pin.
value	8-bit value that enables or disables PWM output (0 or 1 for each pin).

Function is used to enable or disable PWM output on a specific pin.

expand7_send_eeprom_cmd()

void expand7_send_eeprom_cmd	(	expand7_t *	ctx,
		uint8_t	cmd )

Send Command function.

Parameters

ctx	Click object.
cmd	8-bit value that defines the command

Function is used to send the command to Command Register.

expand7_write_all()

void expand7_write_all	(	expand7_t *	ctx,
		uint8_t	value )

Set all OUTPUT pins' logic levels function.

Parameters

ctx	Click object.
value	8-bit value that defines pins' output logic level (0 or 1 for each pin).

Function is used to set logic levels of all ouptut pins.

Note

Since only four pins of ports 2 and 5 are used only the lower nibble of the input value is used.

expand7_write_bit()

void expand7_write_bit	(	expand7_t *	ctx,
		uint8_t	reg_adr,
		uint8_t	bit_num,
		uint8_t	pin_val )

Write bit function.

Parameters

ctx	Click object.
reg_adr	8-bit value that defines the register
bit_num	8-bit value that defines the specific bit
pin_val	8-bit value that defines the specific bit's value

Function is used to set or clear the specific bit.

expand7_write_byte()

void expand7_write_byte	(	expand7_t *	ctx,
		uint8_t	reg_adr,
		uint8_t	wr_data )

Write byte function.

Parameters

ctx	Click object.
reg_adr	8-bit value that defines the register
wr_data	8-bit value that defines the input data

Function is used to write single byte of data into user defined register.

expand7_write_eeprom()

void expand7_write_eeprom	(	expand7_t *	ctx,
		uint16_t	mem_adr,
		uint8_t *	buf,
		uint8_t	len )

EEPROM Write function.

Parameters

ctx	Click object.
reg	8-bit register address
wr_data	8-bit write data
len	8-bit number of bytes

Writes user defined number of bytes into EEPROM defined by 8-bit address

expand7_write_pin()

void expand7_write_pin	(	expand7_t *	ctx,
		uint8_t	pin,
		uint8_t	pin_val )

Set a single OUTPUT pin's logic level function.

Parameters

ctx	Click object.
pin	8-bit value that defines the specific pin
pin_val	8-bit value that defines the specific pin's value

Function is used to set a single output pin's logic level.

expand7_write_port()

void expand7_write_port	(	expand7_t *	ctx,
		uint8_t	port,
		uint8_t	value )

Set all OUTPUT pins' logic levels in one port function.

Parameters

ctx	Click object.
port	8-bit value that defines which port to write to.
value	8-bit value that defines pins' output logic level (0 or 1 for each pin).

Function is used to set logic levels in one port.

expand7_write_port_exp()

void expand7_write_port_exp	(	expand7_t *	ctx,
		uint8_t	reg,
		uint8_t *	buf,
		uint8_t	len )

Port Expander Write function.

Parameters

ctx	Click object.
reg	8-bit register address
buf	8-bit write data
len	8-bit number of bytes

Writes user defined number of bytes into registers defined by 8-bit register address