twr_tca9534a

Driver for TCA9534A I/O expander. More...

Data Structures
struct	twr_tca9534a_t
	Pin state. More...

Enumerations
enum	twr_tca9534a_pin_t {   TWR_TCA9534A_PIN_P0 = 0 ,   TWR_TCA9534A_PIN_P1 = 1 ,   TWR_TCA9534A_PIN_P2 = 2 ,   TWR_TCA9534A_PIN_P3 = 3 ,   TWR_TCA9534A_PIN_P4 = 4 ,   TWR_TCA9534A_PIN_P5 = 5 ,   TWR_TCA9534A_PIN_P6 = 6 ,   TWR_TCA9534A_PIN_P7 = 7 }
	Individual pin names.
enum	twr_tca9534a_pin_direction_t {   TWR_TCA9534A_PIN_DIRECTION_OUTPUT = 0 ,   TWR_TCA9534A_PIN_DIRECTION_INPUT = 1 }
	Pin direction.

Functions
bool	twr_tca9534a_init (twr_tca9534a_t *self, twr_i2c_channel_t i2c_channel, uint8_t i2c_address)
	Initialize TCA9534A. More...
bool	twr_tca9534a_read_port (twr_tca9534a_t *self, uint8_t *state)
	Read state of all pins. More...
bool	twr_tca9534a_write_port (twr_tca9534a_t *self, uint8_t state)
	Write state to all pins. More...
bool	twr_tca9534a_read_pin (twr_tca9534a_t *self, twr_tca9534a_pin_t pin, int *state)
	Read pin state. More...
bool	twr_tca9534a_write_pin (twr_tca9534a_t *self, twr_tca9534a_pin_t pin, int state)
	Write pin state. More...
bool	twr_tca9534a_get_port_direction (twr_tca9534a_t *self, uint8_t *direction)
	Get direction of all pins. More...
bool	twr_tca9534a_set_port_direction (twr_tca9534a_t *self, uint8_t direction)
	Set direction of all pins. More...
bool	twr_tca9534a_get_pin_direction (twr_tca9534a_t *self, twr_tca9534a_pin_t pin, twr_tca9534a_pin_direction_t *direction)
	Get pin direction. More...
bool	twr_tca9534a_set_pin_direction (twr_tca9534a_t *self, twr_tca9534a_pin_t pin, twr_tca9534a_pin_direction_t direction)
	Set pin direction. More...

Detailed Description

Driver for TCA9534A I/O expander.

Function Documentation

twr_tca9534a_get_pin_direction()

bool twr_tca9534a_get_pin_direction	(	twr_tca9534a_t *	self,
		twr_tca9534a_pin_t	pin,
		twr_tca9534a_pin_direction_t *	direction
	)

Get pin direction.

Parameters

[in]	self	Instance
[in]	pin	Pin name
[out]	direction	Pointer to variable where direction of pin will be stored

Returns

true On success

false On failure

Definition at line 99 of file twr_tca9534a.c.

twr_tca9534a_get_port_direction()

bool twr_tca9534a_get_port_direction	(	twr_tca9534a_t *	self,
		uint8_t *	direction
	)

Get direction of all pins.

Parameters

[in]	self	Instance
[out]	direction	Pointer to variable where direction of all pins will be stored

Returns

true On success

false On failure

Definition at line 80 of file twr_tca9534a.c.

twr_tca9534a_init()

bool twr_tca9534a_init	(	twr_tca9534a_t *	self,
		twr_i2c_channel_t	i2c_channel,
		uint8_t	i2c_address
	)

Initialize TCA9534A.

Parameters

[in]	self	Instance
[in]	i2c_channel	I2C channel
[in]	i2c_address	I2C device address

Definition at line 8 of file twr_tca9534a.c.

Referenced by twr_module_gps_init(), twr_module_sensor_init(), and twr_module_x1_init().

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twr_tca9534a_read_pin()

bool twr_tca9534a_read_pin	(	twr_tca9534a_t *	self,
		twr_tca9534a_pin_t	pin,
		int *	state
	)

Read pin state.

Parameters

[in]	self	Instance
[in]	pin	Pin name
[out]	state	Pointer to variable where state of pin will be stored

Returns

true On success

false On failure

Definition at line 47 of file twr_tca9534a.c.

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twr_tca9534a_read_port()

bool twr_tca9534a_read_port	(	twr_tca9534a_t *	self,
		uint8_t *	state
	)

Read state of all pins.

Parameters

[in]	self	Instance
[out]	state	Pointer to variable where state of all pins will be stored

Returns

true On success

false On failure

Definition at line 30 of file twr_tca9534a.c.

Referenced by twr_tca9534a_read_pin().

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twr_tca9534a_set_pin_direction()

bool twr_tca9534a_set_pin_direction	(	twr_tca9534a_t *	self,
		twr_tca9534a_pin_t	pin,
		twr_tca9534a_pin_direction_t	direction
	)

Set pin direction.

Parameters

[in]	self	Instance
[in]	pin	Pin name
[in]	direction	Desired pin direction

Returns

true On success

false On failure

Definition at line 113 of file twr_tca9534a.c.

Referenced by twr_module_sensor_get_revision().

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twr_tca9534a_set_port_direction()

bool twr_tca9534a_set_port_direction	(	twr_tca9534a_t *	self,
		uint8_t	direction
	)

Set direction of all pins.

Parameters

[in]	self	Instance
[in]	direction	Desired direction of all pins

Returns

true On success

false On failure

Definition at line 87 of file twr_tca9534a.c.

Referenced by twr_module_gps_init(), twr_module_sensor_init(), and twr_module_x1_init().

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twr_tca9534a_write_pin()

bool twr_tca9534a_write_pin	(	twr_tca9534a_t *	self,
		twr_tca9534a_pin_t	pin,
		int	state
	)

Write pin state.

Parameters

[in]	self	Instance
[in]	pin	Pin name
[in]	state	Desired state of pin

Returns

true On success

false On failure

Definition at line 61 of file twr_tca9534a.c.

Referenced by twr_module_gps_init(), twr_module_lcd_off(), and twr_module_lcd_on().

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twr_tca9534a_write_port()

bool twr_tca9534a_write_port	(	twr_tca9534a_t *	self,
		uint8_t	state
	)

Write state to all pins.

Parameters

[in]	self	Instance
[in]	state	Desired state of all pins

Returns

true On success

false On failure

Definition at line 35 of file twr_tca9534a.c.

Referenced by twr_module_gps_init(), twr_module_sensor_init(), twr_module_sensor_set_pull(), twr_module_sensor_set_vdd(), twr_module_x1_init(), and twr_tca9534a_write_pin().

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