Module for configuring and using PCAL6408A GPIO expander. More...

Macros
#define	PCAL6408A_BASE_ADDRESS_FIRST 0x20u
	First possible expander address.

#define	PCAL6408A_BASE_ADDRESS_SECOND 0x21u
	Second possible expander address.

#define	PCAL6408A_INSTANCES_DEF_START (pcal6408a_inst_name, instance_count) static pcal6408a_instance_t pcal6408a_inst_name[instance_count]
	Macro that defines expander module. More...

#define	PIN_NUM_CONVERT (pin_num, instance_num) (pin_num + instance_num * PCAL6408A_INNER_PIN_COUNT)
	Macro that converts absolute pin number to pin number dependent on number of expander. More...

Enumerations
enum	pcal6408a_registers_t { PCAL6408A_REG_INPUT_PORT = 0x00, PCAL6408A_REG_OUTPUT_PORT = 0x01, PCAL6408A_REG_POLARITY_INVERSION = 0x02, PCAL6408A_REG_CONFIGURATION = 0x03, PCAL6408A_REG_OUTPUT_DRIVE_STRENGTH_0 = 0x40, PCAL6408A_REG_OUTPUT_DRIVE_STRENGTH_1 = 0x41, PCAL6408A_REG_INPUT_LATCH = 0x42, PCAL6408A_REG_PULL_UP_DOWN_ENABLE = 0x43, PCAL6408A_REG_PULL_UP_DOWN_SELECT = 0x44, PCAL6408A_REG_INTERRUPT_MASK = 0x45, PCAL6408A_REG_INTERRUPT_STATUS = 0x46, PCAL6408A_REG_OUTPUT_PORT_CONFIGURATION = 0x4F }
	Device registers.

enum	pcal6408a_pin_dir_t { PCAL6408A_PIN_DIR_OUTPUT , PCAL6408A_PIN_DIR_INPUT }
	Enumerator used for setting the direction of a pin. More...

enum	pcal6408a_port_dir_t { PCAL6408A_PORT_DIR_OUTPUT = 0x00, PCAL6408A_PORT_DIR_INPUT = 0xFF }
	Enumerator used for setting the direction of a port. More...

enum	pcal6408a_pin_set_t { PCAL6408A_PIN_CLR , PCAL6408A_PIN_SET }
	Enumerator used for setting the state of a pin configured as an output. More...

enum	pcal6408a_pin_pull_t { PCAL6408A_PIN_NOPULL , PCAL6408A_PIN_PULLDOWN , PCAL6408A_PIN_PULLUP }
	Enumerator used for selecting the pin to be pulled down or up. More...

enum	pcal6408a_port_op_t { PCAL6408A_PORT_WRITE , PCAL6408A_PORT_CLEAR , PCAL6408A_PORT_SET }
	Enumerator used for selecting the operation for a port. More...

enum	pcal6408a_pin_drive_strength_t { PCAL6408A_PIN_25_DRIVE_STRENGTH , PCAL6408A_PIN_50_DRIVE_STRENGTH , PCAL6408A_PIN_75_DRIVE_STRENGTH , PCAL6408A_PIN_100_DRIVE_STRENGTH }
	Enumerator used for setting the drive strength of a pin. More...

enum	pcal6408a_port_io_stage_t { PCAL6408A_PORT_PUSH_PULL , PCAL6408A_PORT_OPEN_DRAIN }
	Enumerator used for setting push-pull or open-drain I/O stage for a port. More...

Functions
void	pcal6408a_init ( pcal6408a_instance_t *p_instances, uint8_t count)
	Function initialising expander module. More...

ret_code_t	pcal6408a_add_instance ( nrf_twi_sensor_t *p_twi_sensor, uint8_t sensor_address)
	Function adding expander instance. More...

ret_code_t	pcal6408a_cfg_write (uint8_t instance_num)
	Function for writing current configuration to expander. More...

ret_code_t	pcal6408a_cfg_read (uint8_t instance_num)
	Function for reading current configuration of expander. More...

ret_code_t	pcal6408a_pin_cfg_reg_set ( pcal6408a_registers_t reg_addr, uint32_t pin, uint8_t value)
	Function for setting register configuration of a single pin. More...

uint8_t	pcal6408a_pin_cfg_reg_get ( pcal6408a_registers_t reg_addr, uint32_t pin)
	Function for getting register configuration of a single pin. More...

ret_code_t	pcal6408a_port_cfg_reg_set ( pcal6408a_registers_t reg_addr, uint32_t port, uint8_t mask, pcal6408a_port_op_t flag)
	Function for setting register configuration of a port. More...

uint8_t	pcal6408a_port_cfg_reg_get ( pcal6408a_registers_t reg_addr, uint32_t port)
	Function for getting register configuration of a port. More...

ret_code_t	pcal6408a_pin_data_update ( nrf_twi_sensor_reg_cb_t user_cb)
	Function for updating pin data. More...

ret_code_t	pcal6408a_int_status_update ( nrf_twi_sensor_reg_cb_t user_cb)
	Function for updating interrupt status data. More...

__STATIC_INLINE ret_code_t	pcal6408a_pin_cfg_polarity_inversion (uint32_t pin_number, bool state)
	Function for setting polarity inversion of a given pin. More...

__STATIC_INLINE ret_code_t	pcal6408a_pin_cfg_interrupt (uint32_t pin_number, bool state)
	Function for setting interrupt of a given pin. More...

__STATIC_INLINE ret_code_t	pcal6408a_pin_cfg_latch (uint32_t pin_number, bool state)
	Function for setting input latch of a given pin. More...

ret_code_t	pcal6408a_pin_cfg_drive_strength (uint32_t pin_number, pcal6408a_pin_drive_strength_t drive_strength_config)
	Function for setting drive strength for a given pin. More...

__STATIC_INLINE ret_code_t	pcal6408a_port_cfg_polarity_inversion (uint32_t port_number, uint8_t polarity_mask, pcal6408a_port_op_t flag)
	Function for setting polarity inversion of a given port. More...

__STATIC_INLINE ret_code_t	pcal6408a_port_cfg_interrupt (uint32_t port_number, uint8_t interrupt_mask, pcal6408a_port_op_t flag)
	Function for setting interrupt of a given port. More...

__STATIC_INLINE ret_code_t	pcal6408a_port_cfg_latch (uint32_t port_number, uint8_t latch_mask, pcal6408a_port_op_t flag)
	Function for setting input latch of a given port. More...

ret_code_t	pcal6408a_port_cfg_drive_strength (uint32_t port_number, uint16_t drive_strength_mask, pcal6408a_port_op_t flag)
	Function for setting drive strength for a given port. More...

__STATIC_INLINE ret_code_t	pcal6408a_port_cfg_io_stage (uint32_t port_number, pcal6408a_port_io_stage_t io_stage_config)
	Function for selecting push-pull or open-drain I/O stage for the given port. More...

__STATIC_INLINE ret_code_t	pcal6408a_pin_cfg_output (uint32_t pin_number)
	Function for configuring the given pin number as output. More...

ret_code_t	pcal6408a_pin_cfg_input (uint32_t pin_number, pcal6408a_pin_pull_t pull_config)
	Function for configuring the given pin number as input. More...

__STATIC_INLINE ret_code_t	pcal6408a_pin_set (uint32_t pin_number)
	Function for setting a pin. More...

__STATIC_INLINE ret_code_t	pcal6408a_pin_clear (uint32_t pin_number)
	Function for clearing a pin. More...

ret_code_t	pcal6408a_range_cfg_output (uint32_t pin_range_start, uint32_t pin_range_end)
	Function for configuring the pin range as outputs. More...

ret_code_t	pcal6408a_range_cfg_input (uint32_t pin_range_start, uint32_t pin_range_end, pcal6408a_pin_pull_t pull_config)
	Function for configuring the pin range as inputs. More...

__STATIC_INLINE ret_code_t	pcal6408a_pin_dir_set (uint32_t pin_number, pcal6408a_pin_dir_t direction)
	Function for setting the direction for a given pin. More...

__STATIC_INLINE ret_code_t	pcal6408a_pin_toggle (uint32_t pin_number)
	Function for toggling a given pin. More...

__STATIC_INLINE ret_code_t	pcal6408a_pin_write (uint32_t pin_number, uint8_t value)
	Function for writing a value to a given pin. More...

__STATIC_INLINE uint32_t	pcal6408a_pin_read (uint32_t pin_number)
	Function for reading the input level of a given pin. More...

__STATIC_INLINE ret_code_t	pcal6408a_port_dir_set (uint32_t port_number, pcal6408a_port_dir_t direction)
	Function for setting the direction of a port. More...

__STATIC_INLINE uint32_t	pcal6408a_port_read (uint32_t port_number)
	Function for reading a given port. More...

__STATIC_INLINE ret_code_t	pcal6408a_port_write (uint32_t port_number, uint8_t value)
	Function for writing to a given port. More...

__STATIC_INLINE ret_code_t	pcal6408a_port_set (uint32_t port_number, uint8_t set_mask)
	Function for setting individual pins on given port. More...

__STATIC_INLINE ret_code_t	pcal6408a_port_clear (uint32_t port_number, uint8_t clr_mask)
	Function for clearing individual pins on given port. More...

Detailed Description

Module for configuring and using PCAL6408A GPIO expander.

Macro Definition Documentation

#define PCAL6408A_INSTANCES_DEF_START	(	pcal6408a_inst_name,
		instance_count
	)	static pcal6408a_instance_t pcal6408a_inst_name[instance_count]

Macro that defines expander module.

Parameters

[in]	pcal6408a_inst_name	Name of the instance to be created.
[in]	instance_count	Number of connected expanders.

#define PIN_NUM_CONVERT	(	pin_num,
		instance_num
	)	(pin_num + instance_num * PCAL6408A_INNER_PIN_COUNT)

Macro that converts absolute pin number to pin number dependent on number of expander.

Parameters

[in]	pin_num	Absolute pin number ranging from 0 to 7.
[in]	instance_num	Number of expander, order is the same as pcal6408a_add_instance calls.

Enumeration Type Documentation

enum pcal6408a_pin_dir_t

Enumerator used for setting the direction of a pin.

Enumerator
PCAL6408A_PIN_DIR_OUTPUT	Output.
PCAL6408A_PIN_DIR_INPUT	Input.

enum pcal6408a_pin_drive_strength_t

Enumerator used for setting the drive strength of a pin.

Enumerator
PCAL6408A_PIN_25_DRIVE_STRENGTH	Drive strength set to 25% of current drive capability.
PCAL6408A_PIN_50_DRIVE_STRENGTH	Drive strength set to 50% of current drive capability.
PCAL6408A_PIN_75_DRIVE_STRENGTH	Drive strength set to 75% of current drive capability.
PCAL6408A_PIN_100_DRIVE_STRENGTH	Drive strength set to 100% of current drive capability.

enum pcal6408a_pin_pull_t

Enumerator used for selecting the pin to be pulled down or up.

Enumerator
PCAL6408A_PIN_NOPULL	No pull.
PCAL6408A_PIN_PULLDOWN	Pin pulldown resistor enabled.
PCAL6408A_PIN_PULLUP	Pin pullup resistor enabled.

enum pcal6408a_pin_set_t

Enumerator used for setting the state of a pin configured as an output.

Enumerator
PCAL6408A_PIN_CLR	Clear.
PCAL6408A_PIN_SET	Set.

enum pcal6408a_port_dir_t

Enumerator used for setting the direction of a port.

Enumerator
PCAL6408A_PORT_DIR_OUTPUT	Output.
PCAL6408A_PORT_DIR_INPUT	Input.

enum pcal6408a_port_io_stage_t

Enumerator used for setting push-pull or open-drain I/O stage for a port.

Enumerator
PCAL6408A_PORT_PUSH_PULL	Push-pull I/O stage.
PCAL6408A_PORT_OPEN_DRAIN	Open-drain I/O stage.

enum pcal6408a_port_op_t

Enumerator used for selecting the operation for a port.

Enumerator
PCAL6408A_PORT_WRITE	Mask is written to the port.
PCAL6408A_PORT_CLEAR	Positive bits in mask are cleared in port.
PCAL6408A_PORT_SET	Positive bits in mask are set in port.

Function Documentation

ret_code_t pcal6408a_add_instance	(	nrf_twi_sensor_t *	p_twi_sensor ,
		uint8_t	sensor_address
	)

Function adding expander instance.

Note: Should be called for every connected expander. Order of calls define order of pins and ports.

Parameters

[in]	p_twi_sensor	Pointer to common sensor instance. NRF_TWI_SENSOR_DEF
[in]	sensor_address	Address of expander on I2C bus.

Return values

NRF_ERROR_MODULE_NOT_INITIALIZED	If expander module wasn't initialised
NRF_ERROR_STORAGE_FULL	If trying to add more instances than defined.
other	Error code from nrf_twi_sensor nrf_twi_sensor_write

ret_code_t pcal6408a_cfg_read ( uint8_t instance_num )

Function for reading current configuration of expander.

Parameters

[in] instance_num Number of expander, order is the same as pcal6408a_add_instance calls.

Return values

NRF_ERROR_INVALID_PARAM	If there is no expander with given number.
other	Error code from nrf_twi_sensor nrf_twi_sensor_write

ret_code_t pcal6408a_cfg_write ( uint8_t instance_num )

Function for writing current configuration to expander.

Parameters

[in] instance_num Number of expander, order is the same as pcal6408a_add_instance calls.

Return values

NRF_ERROR_INVALID_PARAM	If there is no expander with given number.
other	Error code from nrf_twi_sensor nrf_twi_sensor_write

void pcal6408a_init	(	pcal6408a_instance_t *	p_instances ,
		uint8_t	count
	)

Function initialising expander module.

Parameters

[in]	p_instances	Pointer to expander module.
[in]	count	Number of connected expanders.

ret_code_t pcal6408a_int_status_update ( nrf_twi_sensor_reg_cb_t user_cb )

Function for updating interrupt status data.

Parameters

user_cb Function to be called after interrupt status update is done.

Returns: Return error code from nrf_twi_sensor nrf_twi_sensor_reg_read

ret_code_t pcal6408a_pin_cfg_drive_strength	(	uint32_t	pin_number ,
		pcal6408a_pin_drive_strength_t	drive_strength_config
	)

Function for setting drive strength for a given pin.

Note: Note that the pin must be configured as an output for this function to have any effect.

Parameters

[in]	pin_number	Specifies the pin number.
[in]	drive_strength_config	Drive strength of current drive capability (25%, 50%, 75% or 100%) pcal6408a_pin_drive_strength_t

Returns: Error code from pin_cfg_reg_set pcal6408a_pin_cfg_reg_set

ret_code_t pcal6408a_pin_cfg_input	(	uint32_t	pin_number ,
		pcal6408a_pin_pull_t	pull_config
	)

Function for configuring the given pin number as input.

Parameters

[in]	pin_number	Specifies the pin number.
[in]	pull_config	State of the pin pull resistor (no pull, pulled down, or pulled high) pcal6408a_pin_pull_t

Returns: Error code from pin_cfg_reg_set pcal6408a_pin_cfg_reg_set

__STATIC_INLINE ret_code_t pcal6408a_pin_cfg_interrupt	(	uint32_t	pin_number ,
		bool	state
	)

Function for setting interrupt of a given pin.

Note: Note that the pin must be configured as an input for this function to have any effect.

Parameters

[in]	pin_number	Specifies the pin number.
[in]	state	true Disables interrupt. false Enables interrupt.

Returns: Error code from pin_cfg_reg_set pcal6408a_pin_cfg_reg_set

__STATIC_INLINE ret_code_t pcal6408a_pin_cfg_latch	(	uint32_t	pin_number ,
		bool	state
	)

Function for setting input latch of a given pin.

Note: Note that the pin must be configured as an input for this function to have any effect.

Parameters

[in]	pin_number	Specifies the pin number.
[in]	state	true Enables input latch. false Disables input latch.

Returns: Error code from pin_cfg_reg_set pcal6408a_pin_cfg_reg_set

__STATIC_INLINE ret_code_t pcal6408a_pin_cfg_output ( uint32_t pin_number )

Function for configuring the given pin number as output.

Parameters

[in] pin_number Specifies the pin number.

Returns: Error code from pin config set pcal6408a_pin_cfg_reg_set

__STATIC_INLINE ret_code_t pcal6408a_pin_cfg_polarity_inversion	(	uint32_t	pin_number ,
		bool	state
	)

Function for setting polarity inversion of a given pin.

Note: Note that the pin must be configured as an input for this function to have any effect.

Parameters

[in]	pin_number	Specifies the pin number.
[in]	state	true Enables polarity inversion. false Disables polarity inversion.

Returns: Error code from pin_cfg_reg_set pcal6408a_pin_cfg_reg_set

uint8_t pcal6408a_pin_cfg_reg_get	(	pcal6408a_registers_t	reg_addr ,
		uint32_t	pin
	)

Function for getting register configuration of a single pin.

Parameters

[in]	reg_addr	Register address.
[in]	pin	Pin number.

Returns: Pin configuration value

ret_code_t pcal6408a_pin_cfg_reg_set	(	pcal6408a_registers_t	reg_addr ,
		uint32_t	pin ,
		uint8_t	value
	)

Function for setting register configuration of a single pin.

Parameters

[in]	reg_addr	Register address.
[in]	pin	Pin number.
[in]	value	Value to set.

Returns: Error code from nrf_twi_sensor nrf_twi_sensor_write

__STATIC_INLINE ret_code_t pcal6408a_pin_clear ( uint32_t pin_number )

Function for clearing a pin.

Note: Note that the pin must be configured as an output for this function to have any effect.

Parameters

[in] pin_number Specifies the pin number to clear.

Returns: Error code from pin_cfg_reg_set pcal6408a_pin_cfg_reg_set

ret_code_t pcal6408a_pin_data_update ( nrf_twi_sensor_reg_cb_t user_cb )

Function for updating pin data.

Parameters

user_cb Function to be called after pin data update is done.

Returns: Return error code from nrf_twi_sensor nrf_twi_sensor_reg_read

__STATIC_INLINE ret_code_t pcal6408a_pin_dir_set	(	uint32_t	pin_number ,
		pcal6408a_pin_dir_t	direction
	)

Function for setting the direction for a given pin.

Parameters

[in]	pin_number	Specifies the pin number.
[in]	direction	Specifies the direction.

Returns: Error code from pin_cfg_reg_set pcal6408a_pin_cfg_reg_set

__STATIC_INLINE uint32_t pcal6408a_pin_read ( uint32_t pin_number )

Function for reading the input level of a given pin.

Note: Input data should be updated prior using this function, with pcal6408a_pin_data_update

Parameters

[in] pin_number Specifies the pin number.

Returns: Error code from pin_cfg_reg_set pcal6408a_pin_cfg_reg_set

__STATIC_INLINE ret_code_t pcal6408a_pin_set ( uint32_t pin_number )

Function for setting a pin.

Note: Note that the pin must be configured as an output for this function to have any effect.

Parameters

[in] pin_number Specifies the pin number to set.

Returns: Error code from pin_cfg_reg_set pcal6408a_pin_cfg_reg_set

__STATIC_INLINE ret_code_t pcal6408a_pin_toggle ( uint32_t pin_number )

Function for toggling a given pin.

Note: Note that the pin must be configured as an output for this function to have any effect.

Parameters

[in] pin_number Specifies the pin number.

Returns: Error code from pin_cfg_reg_set pcal6408a_pin_cfg_reg_set

__STATIC_INLINE ret_code_t pcal6408a_pin_write	(	uint32_t	pin_number ,
		uint8_t	value
	)

Function for writing a value to a given pin.

Note: Note that the pin must be configured as an output for this function to have any effect.

Parameters

[in]	pin_number	Specifies the pin number.
[in]	value	Specifies the value to be written to the pin. 0 Clears the pin. 1 Sets the pin.

Returns: Error code from pin_cfg_reg_set pcal6408a_pin_cfg_reg_set

ret_code_t pcal6408a_port_cfg_drive_strength	(	uint32_t	port_number ,
		uint16_t	drive_strength_mask ,
		pcal6408a_port_op_t	flag
	)

Function for setting drive strength for a given port.

Note: Note that this function have an effect only for pins that are configured as an output.

Parameters

[in]	port_number	Specifies the port number.
[in]	drive_strength_mask	Specifies the mask. Note that for each pin there are dedicated two adjacent bits.
[in]	flag	Operation, whether mask should be written into register, values should be cleared or set pcal6408a_port_op_t

Returns: Error code from port_cfg_reg_set pcal6408a_port_cfg_reg_set

__STATIC_INLINE ret_code_t pcal6408a_port_cfg_interrupt	(	uint32_t	port_number ,
		uint8_t	interrupt_mask ,
		pcal6408a_port_op_t	flag
	)

Function for setting interrupt of a given port.

Note: Note that this function have an effect only for pins that are configured as an input.

Parameters

[in]	port_number	Specifies the port number.
[in]	interrupt_mask	Specifies the mask.
[in]	flag	Operation, whether mask should be written into register, values should be cleared or set pcal6408a_port_op_t

Returns: Error code from port_cfg_reg_set pcal6408a_port_cfg_reg_set

__STATIC_INLINE ret_code_t pcal6408a_port_cfg_io_stage	(	uint32_t	port_number ,
		pcal6408a_port_io_stage_t	io_stage_config
	)

Function for selecting push-pull or open-drain I/O stage for the given port.

Parameters

[in]	port_number	Specifies the port number.
[in]	io_stage_config	I/O stage of the port (push-pull or open-drain) pcal6408a_port_io_stage_t

Returns: Error code from port_cfg_reg_set pcal6408a_port_cfg_reg_set

__STATIC_INLINE ret_code_t pcal6408a_port_cfg_latch	(	uint32_t	port_number ,
		uint8_t	latch_mask ,
		pcal6408a_port_op_t	flag
	)

Function for setting input latch of a given port.

Note: Note that this function have an effect only for pins that are configured as an input.

Parameters

[in]	port_number	Specifies the port number.
[in]	latch_mask	Specifies the mask.
[in]	flag	Operation, whether mask should be written into register, values should be cleared or set pcal6408a_port_op_t

Returns: Error code from port_cfg_reg_set pcal6408a_port_cfg_reg_set

__STATIC_INLINE ret_code_t pcal6408a_port_cfg_polarity_inversion	(	uint32_t	port_number ,
		uint8_t	polarity_mask ,
		pcal6408a_port_op_t	flag
	)

Function for setting polarity inversion of a given port.

Note: Note that this function have an effect only for pins that are configured as an input.

Parameters

[in]	port_number	Specifies the port number.
[in]	polarity_mask	Specifies the mask.
[in]	flag	Operation, whether mask should be written into register, values should be cleared or set pcal6408a_port_op_t

Returns: Error code from port_cfg_reg_set pcal6408a_port_cfg_reg_set

uint8_t pcal6408a_port_cfg_reg_get	(	pcal6408a_registers_t	reg_addr ,
		uint32_t	port
	)

Function for getting register configuration of a port.

Note: When reading input register, it should be updated prior using this function, with pcal6408a_pin_data_update When reading interrupt status register, it should be updated prior using this function, with pcal6408a_int_status_update

Parameters

[in]	reg_addr	Register address.
[in]	port	Port number.

Returns: Register value

ret_code_t pcal6408a_port_cfg_reg_set	(	pcal6408a_registers_t	reg_addr ,
		uint32_t	port ,
		uint8_t	mask ,
		pcal6408a_port_op_t	flag
	)

Function for setting register configuration of a port.

Parameters

[in]	reg_addr	Register address.
[in]	port	Port number.
[in]	mask	Mask for the operation.
[in]	flag	Operation, whether mask should be written into register, values should be cleared or set pcal6408a_port_op_t

Return values

NRF_ERROR_INVALID_PARAM	If there is no port with such number or invalid flag operation.
other	Error code from nrf_twi_sensor nrf_twi_sensor_write

__STATIC_INLINE ret_code_t pcal6408a_port_clear	(	uint32_t	port_number ,
		uint8_t	clr_mask
	)

Function for clearing individual pins on given port.

Note: Note that this function have an effect only for pins that are configured as an output.

Parameters

[in]	port_number	Specifies the port number.
[in]	clr_mask	Mask specifying which pins to clear. A bit set to 1 indicates that the corresponding port pin shall be cleared.

Returns: Error code from port_cfg_reg_set pcal6408a_port_cfg_reg_set

__STATIC_INLINE ret_code_t pcal6408a_port_dir_set	(	uint32_t	port_number ,
		pcal6408a_port_dir_t	direction
	)

Function for setting the direction of a port.

Parameters

[in]	port_number	Specifies the port number.
[in]	direction	Specifies the direction.

Returns: Error code from port_cfg_reg_set pcal6408a_port_cfg_reg_set

__STATIC_INLINE uint32_t pcal6408a_port_read ( uint32_t port_number )

Function for reading a given port.

Note: Input data should be updated prior using this function, with pcal6408a_pin_data_update

Parameters

[in] port_number Specifies the port number.

Returns: Error code from port_cfg_reg_set pcal6408a_port_cfg_reg_set

__STATIC_INLINE ret_code_t pcal6408a_port_set	(	uint32_t	port_number ,
		uint8_t	set_mask
	)

Function for setting individual pins on given port.

Note: Note that this function have an effect only for pins that are configured as an output.

Parameters

[in]	port_number	Specifies the port number.
[in]	set_mask	Mask specifying which pins to set. A bit set to 1 indicates that the corresponding port pin shall be set.

Returns: Error code from port_cfg_reg_set pcal6408a_port_cfg_reg_set

__STATIC_INLINE ret_code_t pcal6408a_port_write	(	uint32_t	port_number ,
		uint8_t	value
	)

Function for writing to a given port.

Note: Note that this function have an effect only for pins that are configured as an output.

Parameters

[in]	port_number	Specifies the port number.
[in]	value	Specifies the value to be written to the port.

Returns: Error code from port_cfg_reg_set pcal6408a_port_cfg_reg_set

ret_code_t pcal6408a_range_cfg_input	(	uint32_t	pin_range_start ,
		uint32_t	pin_range_end ,
		pcal6408a_pin_pull_t	pull_config
	)

Function for configuring the pin range as inputs.

Note: For configuring only one pin as an input use pcal6408a_pin_cfg_input .

Parameters

[in]	pin_range_start	Specifies the start number (inclusive) in the range of pin numbers to be configured.
[in]	pin_range_end	Specifies the end number (inclusive) in the range of pin numbers to be configured.
[in]	pull_config	State of the pin pull resistor (no pull, pulled down, or pulled high) pcal6408a_pin_pull_t

Return values

NRF_ERROR_INVALID_LENGTH	If start number is greater than end number.
other	Error code from port_cfg_reg_set pcal6408a_port_cfg_reg_set

ret_code_t pcal6408a_range_cfg_output	(	uint32_t	pin_range_start ,
		uint32_t	pin_range_end
	)

Function for configuring the pin range as outputs.

Note: For configuring only one pin as an output use pcal6408a_pin_cfg_output .

Parameters

[in]	pin_range_start	Specifies the start number (inclusive) in the range of pin numbers to be configured.
[in]	pin_range_end	Specifies the end number (inclusive) in the range of pin numbers to be configured.

Return values

NRF_ERROR_INVALID_LENGTH	If start number is greater than end number.
other	Error code from port_cfg_reg_set pcal6408a_port_cfg_reg_set

PCAL6408A Driver

nRF5 SDK v17.1.0

Macros

Enumerations

Functions

Detailed Description

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation