Public function

Functions
void	expand2_cfg_setup (expand2_cfg_t *cfg)
	Config Object Initialization function.
EXPAND2_RETVAL	expand2_init (expand2_t *ctx, expand2_cfg_t *cfg)
	Initialization function.
void	expand2_default_cfg (expand2_t *ctx)
	Click Default Configuration function.
void	expand2_generic_write (expand2_t *ctx, uint8_t reg, uint8_t *data_buf, uint8_t len)
	Generic write function.
void	expand2_generic_read (expand2_t *ctx, uint8_t reg, uint8_t *data_buf, uint8_t len)
	Generic read function.
void	expand2_set_bits (expand2_t *ctx, uint8_t module_address, uint8_t reg_address, uint8_t bit_mask)
	Set register bits function.
void	expand2_clear_bits (expand2_t *ctx, uint8_t module_address, uint8_t reg_address, uint8_t bit_mask)
	Clear register bits function.
void	expand2_toggle_bits (expand2_t *ctx, uint8_t module_address, uint8_t reg_address, uint8_t bit_mask)
	Toggle register bits function.
uint8_t	expand2_read_port_a (expand2_t *ctx, uint8_t module_address)
	Read one byte of data from PORTA function.
uint8_t	expand2_read_port_b (expand2_t *ctx, uint8_t module_address)
	Read one byte of data from PORTB function.
uint16_t	expand2_read_both_ports (expand2_t *ctx, uint8_t module_address)
	Read two byte of data from PORTA & PORTB function.
void	expand2_write_port_a (expand2_t *ctx, uint8_t module_address, uint8_t write_data)
	Write one byte of data to register for PORTA function.
void	expand2_clear_bit_port_a (expand2_t *ctx, uint8_t moduleAddress, uint8_t bitMask)
	Clear bit from register for PORTA function.
void	expand2_set_bit_port_a (expand2_t *ctx, uint8_t module_address, uint8_t bit_mask)
	Set bit to register for PORTA function.
void	expand2_toggle_bit_port_a (expand2_t *ctx, uint8_t module_address, uint8_t bit_mask)
	Toggle bit to register for PORTA function.
void	expand2_write_port_b (expand2_t *ctx, uint8_t module_address, uint8_t write_data)
	Write one byte of data to register for PORTB function.
void	expand2_clear_bit_port_b (expand2_t *ctx, uint8_t module_address, uint8_t bit_mask)
	Clear bit from register for PORTB function.
void	expand2_setBitPortB (expand2_t *ctx, uint8_t module_address, uint8_t bit_mask)
	Set bit to register for PORTB function.
void	expand2_toggle_bit_port_b (expand2_t *ctx, uint8_t module_address, uint8_t bit_mask)
	Toggle bit to register for PORTB function.
void	expand2_set_direction_port_a (expand2_t *ctx, uint8_t module_address, uint8_t write_data)
	Set expander PORTA direction function.
void	expand2_set_input_dir_port_a (expand2_t *ctx, uint8_t module_address, uint8_t bit_mask)
	Set expander PORTA input direction function.
void	expand2_set_output_dir_port_a (expand2_t *ctx, uint8_t module_address, uint8_t bit_mask)
	Set expander PORTA output direction function.
void	expand2_set_direction_port_b (expand2_t *ctx, uint8_t module_address, uint8_t write_data)
	Set expander PORTB direction function.
void	expand2_set_input_dir_port_b (expand2_t *ctx, uint8_t module_address, uint8_t bit_mask)
	Set expander PORTB input direction function.
void	expand2_set_output_dir_port_b (expand2_t *ctx, uint8_t module_address, uint8_t bit_mask)
	Set expander PORTB output direction function.
void	expand2_set_pull_ups_port_a (expand2_t *ctx, uint8_t module_address, uint8_t write_data)
	Set pull-ups of the expander for PORTA pins function.
void	expand2_set_pull_ups_port_b (expand2_t *ctx, uint8_t module_address, uint8_t write_data)
	Set pull-ups of the expander for PORTB pins function.
void	expand2_set_port_a (expand2_t *ctx, uint8_t module_address, uint8_t position)
	Active pin by position on PORTA function.
void	expand2_set_port_b (expand2_t *ctx, uint8_t module_address, uint8_t position)
	Active pin by position on PORTB function.
void	expand2_reset (expand2_t *ctx)
	Reset function.
uint8_t	expand2_getInterrupt (expand2_t *ctx)
	Get state of interrupt pin function.

Detailed Description

Function Documentation

expand2_cfg_setup()

void expand2_cfg_setup

(

expand2_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.

expand2_clear_bit_port_a()

void expand2_clear_bit_port_a	(	expand2_t *	ctx,
		uint8_t	moduleAddress,
		uint8_t	bitMask )

Clear bit from register for PORTA function.

Parameters

ctx	Click object.
module_address	module address
bit_mask	bits mask

@description Function clear bit from 8-bit register address from PORTA of MCP23017 chip.

expand2_clear_bit_port_b()

void expand2_clear_bit_port_b	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	bit_mask )

Clear bit from register for PORTB function.

Parameters

ctx	Click object.
module_address	module address
bit_mask	bits mask

@description Function clear bit from 8-bit register address from PORTB of MCP23017 chip.

expand2_clear_bits()

void expand2_clear_bits	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	reg_address,
		uint8_t	bit_mask )

Clear register bits function.

Parameters

ctx	Click object.
module_address	module address
reg_address	register address
bit_mask	bits mask

@description Function clear bits from 8-bit register address of MCP23017 chip.

expand2_default_cfg()

void expand2_default_cfg

(

expand2_t *

ctx

)

Click Default Configuration function.

Parameters

ctx	Click object.

@description This function executes default configuration for Expand2 click.

expand2_generic_read()

void expand2_generic_read	(	expand2_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.

expand2_generic_write()

void expand2_generic_write	(	expand2_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.

expand2_getInterrupt()

uint8_t expand2_getInterrupt

(

expand2_t *

ctx

)

Get state of interrupt pin function.

Parameters

ctx	Click object.

Returns

state

  
       0 - No Active
       1 - Active
     

@description Function get state of interrupt ( INT ) pin.

expand2_init()

EXPAND2_RETVAL expand2_init	(	expand2_t *	ctx,
		expand2_cfg_t *	cfg )

Initialization function.

Parameters

expand2	Click object.
cfg	Click configuration structure.

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

expand2_read_both_ports()

uint16_t expand2_read_both_ports	(	expand2_t *	ctx,
		uint8_t	module_address )

Read two byte of data from PORTA & PORTB function.

Parameters

ctx	Click object.
module_address	module address

Returns

result read data ( PORTA & PORTB )

@description Function read 16-bit of data from PORTA & PORTB from 8-bit register address of MCP23017 chip.

expand2_read_port_a()

uint8_t expand2_read_port_a	(	expand2_t *	ctx,
		uint8_t	module_address )

Read one byte of data from PORTA function.

Parameters

ctx	Click object.
module_address	module address

Returns

result read data ( PORTA )

@description Function read 8-bit of data from PORTA from 8-bit register address of MCP23017 chip.

expand2_read_port_b()

uint8_t expand2_read_port_b	(	expand2_t *	ctx,
		uint8_t	module_address )

Read one byte of data from PORTB function.

Parameters

ctx	Click object.
module_address	module address

Returns

result read data ( PORTB )

@description Function read 8-bit of data from PORTB from 8-bit register address of MCP23017 chip.

expand2_reset()

void expand2_reset

(

expand2_t *

ctx

)

Reset function.

Parameters

ctx	Click object.
module_address	module address
write_data	pull up value

@description Function reset Expand 2 click by set RST pin from low to high.

Note

delay is 11ms

expand2_set_bit_port_a()

void expand2_set_bit_port_a	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	bit_mask )

Set bit to register for PORTA function.

Parameters

ctx	Click object.
module_address	module address
bit_mask	bits mask

@description Function set bit to 8-bit register address from PORTA of MCP23017 chip.

expand2_set_bits()

void expand2_set_bits	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	reg_address,
		uint8_t	bit_mask )

Set register bits function.

Parameters

ctx	Click object.
module_address	module address
reg_address	register address
bit_mask	bits mask

@description Function set bits to 8-bit register address of MCP23017 chip.

expand2_set_direction_port_a()

void expand2_set_direction_port_a	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	write_data )

Set expander PORTA direction function.

Parameters

ctx	Click object.
module_address	module address
write_data	data to write

@description Function set expander direction by write 8-bit data to 8-bit register address from PORTA of MCP23017 chip.

expand2_set_direction_port_b()

void expand2_set_direction_port_b	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	write_data )

Set expander PORTB direction function.

Parameters

ctx	Click object.
module_address	module address
write_data	data to write

@description Function set expander direction by write 8-bit data to 8-bit register address from PORTB of MCP23017 chip.

expand2_set_input_dir_port_a()

void expand2_set_input_dir_port_a	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	bit_mask )

Set expander PORTA input direction function.

Parameters

ctx	Click object.
module_address	module addres
bit_mask	bit mask

@description Function write bit, when expander direction of PORTA set as input, to 8-bit register address from PORTA of MCP23017 chip.

expand2_set_input_dir_port_b()

void expand2_set_input_dir_port_b	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	bit_mask )

Set expander PORTB input direction function.

Parameters

ctx	Click object.
module_address	module address
bit_mask	bit mask

@description Function write bit, when expander direction of PORTB set as input, to 8-bit register address from PORTB of MCP23017 chip.

expand2_set_output_dir_port_a()

void expand2_set_output_dir_port_a	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	bit_mask )

Set expander PORTA output direction function.

Parameters

ctx	Click object.
module_address	module address
bit_mask	bit mask

@description Function write bit, when expander direction of PORTA set as output, to 8-bit register address from PORTA of MCP23017 chip.

expand2_set_output_dir_port_b()

void expand2_set_output_dir_port_b	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	bit_mask )

Set expander PORTB output direction function.

Parameters

ctx	Click object.
module_address	module address
bit_mask	bit mask

@description Function write bit, when expander direction of PORTB set as output, to 8-bit register address from PORTB of MCP23017 chip.

expand2_set_port_a()

void expand2_set_port_a	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	position )

Active pin by position on PORTA function.

Parameters

ctx	Click object.
module_address	module address
position	pin position

@description Function activate pin on PORTA by position, from PA0 to PA7.

expand2_set_port_b()

void expand2_set_port_b	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	position )

Active pin by position on PORTB function.

Parameters

ctx	Click object.
module_address	module address
position	pin position

@description Function activate pin on PORTB by position, from PB0 to PB7.

expand2_set_pull_ups_port_a()

void expand2_set_pull_ups_port_a	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	write_data )

Set pull-ups of the expander for PORTA pins function.

Parameters

ctx	Click object.
module_address	module address
write_data	pull up value

@description Function set pull-ups of the expander for PORTA pins by write 8-bit pull up value data to 8-bit register address from PORTA of MCP23017 chip.

expand2_set_pull_ups_port_b()

void expand2_set_pull_ups_port_b	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	write_data )

Set pull-ups of the expander for PORTB pins function.

Parameters

ctx	Click object.
module_address	module address
write_data	pull up value

@description Function set pull-ups of the expander for PORTB pins by write 8-bit pull up value data to 8-bit register address from PORTB of MCP23017 chip.

expand2_setBitPortB()

void expand2_setBitPortB	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	bit_mask )

Set bit to register for PORTB function.

Parameters

ctx	Click object.
module_address	module address
bit_mask	bits mask

@description Function set bit to 8-bit register address from PORTB of MCP23017 chip.

expand2_toggle_bit_port_a()

void expand2_toggle_bit_port_a	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	bit_mask )

Toggle bit to register for PORTA function.

Parameters

ctx	Click object.
module_address	module address
bit_mask	bits mask

@description Function toggle bit from 8-bit register address from PORTA of MCP23017 chip.

expand2_toggle_bit_port_b()

void expand2_toggle_bit_port_b	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	bit_mask )

Toggle bit to register for PORTB function.

Parameters

ctx	Click object.
module_address	module address
bit_mask	bits mask

@description Function toggle bit from 8-bit register address from PORTB of MCP23017 chip.

expand2_toggle_bits()

void expand2_toggle_bits	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	reg_address,
		uint8_t	bit_mask )

Toggle register bits function.

Parameters

ctx	Click object.
module_address	module address
reg_address	register address
bit_mask	bits mask

@description Function toggle bits from 8-bit register address of MCP23017 chip.

expand2_write_port_a()

void expand2_write_port_a	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	write_data )

Write one byte of data to register for PORTA function.

Parameters

ctx	Click object.
module_address	module address
write_data	data to write

@description Function write 8-bit of data to 8-bit register address from PORTA of MCP23017 chip.

expand2_write_port_b()

void expand2_write_port_b	(	expand2_t *	ctx,
		uint8_t	module_address,
		uint8_t	write_data )

Write one byte of data to register for PORTB function.

Parameters

ctx	Click object.
module_address	module address
write_data	data to write

@description Function write 8-bit of data to 8-bit register address from PORTB of MCP23017 chip.