pca95x4.h File Reference

Driver for the 8-bit I/O expander based on i2c. More...

#include "std.h"
#include "mcu_periph/i2c.h"

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Data Structures
struct	pca95x4
	PCA95X4 structure. More...

Macros
#define	PCA95X4_DEFAULT_ADDRESS   0x40
#define	PCA95X4_INPUT_REG   (0x00)
#define	PCA95X4_OUTPUT_REG   (0x01)
#define	PCA95X4_POL_REG   (0x02)
#define	PCA95X4_CONFIG_REG   (0x03)
#define	PCA95X4_P0   (1 << 0)
#define	PCA95X4_P1   (1 << 1)
#define	PCA95X4_P2   (1 << 2)
#define	PCA95X4_P3   (1 << 3)
#define	PCA95X4_P4   (1 << 4)
#define	PCA95X4_P5   (1 << 5)
#define	PCA95X4_P6   (1 << 6)
#define	PCA95X4_P7   (1 << 7)
#define	PCA95X4_CLEAR_ALL   0x00

Functions
void	pca95x4_init (struct pca95x4 *dev, struct i2c_periph *i2c_p, uint8_t addr)
	Init PCA95X4. More...
bool	pca95x4_configure (struct pca95x4 *dev, uint8_t val, bool blocking)
	Configure PCA95X4. More...
bool	pca95x4_set_output (struct pca95x4 *dev, uint8_t mask, bool blocking)
	Set output value. More...

Detailed Description

Driver for the 8-bit I/O expander based on i2c.

Definition in file pca95x4.h.

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Data Structure Documentation

struct pca95x4

PCA95X4 structure.

Definition at line 53 of file pca95x4.h.

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Data Fields
struct i2c_periph *	i2c_p
struct i2c_transaction	i2c_trans

Macro Definition Documentation

#define PCA95X4_CLEAR_ALL   0x00

Definition at line 49 of file pca95x4.h.

#define PCA95X4_CONFIG_REG   (0x03)

Definition at line 38 of file pca95x4.h.

Referenced by pca95x4_configure().

#define PCA95X4_DEFAULT_ADDRESS   0x40

Definition at line 33 of file pca95x4.h.

Referenced by multi_ranger_init().

#define PCA95X4_INPUT_REG   (0x00)

Definition at line 35 of file pca95x4.h.

#define PCA95X4_OUTPUT_REG   (0x01)

Definition at line 36 of file pca95x4.h.

Referenced by pca95x4_set_output().

#define PCA95X4_P0   (1 << 0)

Definition at line 40 of file pca95x4.h.

#define PCA95X4_P1   (1 << 1)

Definition at line 41 of file pca95x4.h.

#define PCA95X4_P2   (1 << 2)

Definition at line 42 of file pca95x4.h.

#define PCA95X4_P3   (1 << 3)

Definition at line 43 of file pca95x4.h.

#define PCA95X4_P4   (1 << 4)

Definition at line 44 of file pca95x4.h.

#define PCA95X4_P5   (1 << 5)

Definition at line 45 of file pca95x4.h.

#define PCA95X4_P6   (1 << 6)

Definition at line 46 of file pca95x4.h.

#define PCA95X4_P7   (1 << 7)

Definition at line 47 of file pca95x4.h.

#define PCA95X4_POL_REG   (0x02)

Definition at line 37 of file pca95x4.h.

Function Documentation

bool pca95x4_configure	(	struct pca95x4 *	dev,
		uint8_t	val,
		bool	blocking
	)

Configure PCA95X4.

Parameters

[in]	dev	address to pca95x4 device
[in]	val	value to write to confi register
[in]	blocking	true for blocking i2c transaction

Returns

false if i2c was not ready or transaction submit fails or timeout (blocking)

Definition at line 42 of file pca95x4.c.

References i2c_transaction::buf, i2c_blocking_transmit(), pca95x4::i2c_p, pca95x4::i2c_trans, i2c_transmit(), I2CTransDone, I2CTransFailed, I2CTransSuccess, PCA95X4_CONFIG_REG, i2c_transaction::slave_addr, i2c_transaction::status, and val.

Referenced by multi_ranger_init(), and multi_ranger_periodic().

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void pca95x4_init	(	struct pca95x4 *	dev,
		struct i2c_periph *	i2c_p,
		uint8_t	addr
	)

Init PCA95X4.

Parameters

[in]	dev	address to pca95x4 device
[in]	i2c_p	addres of i2c bus
[in]	addr	i2c address

Definition at line 30 of file pca95x4.c.

References pca95x4::i2c_p, pca95x4::i2c_trans, I2CTransDone, i2c_transaction::slave_addr, and i2c_transaction::status.

Referenced by multi_ranger_init().

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bool pca95x4_set_output	(	struct pca95x4 *	dev,
		uint8_t	mask,
		bool	blocking
	)

Set output value.

Parameters

[in]	dev	address to pca95x4 device
[in]	mask	output pins to set
[in]	blocking	true for blocking i2c transaction

Returns

false if i2c was not ready or transaction submit fails or timeout (blocking)

Definition at line 60 of file pca95x4.c.

References i2c_transaction::buf, i2c_blocking_transmit(), pca95x4::i2c_p, pca95x4::i2c_trans, i2c_transmit(), I2CTransDone, I2CTransFailed, I2CTransSuccess, PCA95X4_OUTPUT_REG, i2c_transaction::slave_addr, and i2c_transaction::status.

Referenced by multi_ranger_init(), and multi_ranger_periodic().

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