pca95x4.c File Reference

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

#include "peripherals/pca95x4.h"

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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.c.

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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