pca95xx.c File Reference

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

#include "peripherals/pca95xx.h"

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Functions
void	pca95xx_init (struct pca95xx *dev, struct i2c_periph *i2c_p, uint8_t addr)
	Init PCA95XX. More...
bool	pca95xx_configure (struct pca95xx *dev, uint8_t val, bool blocking)
	Configure PCA95XX. More...
bool	pca95xx_set_output (struct pca95xx *dev, uint8_t mask, bool blocking)
	Set output value. More...
bool	pca95xx_get_input (struct pca95xx *dev, uint8_t mask, uint8_t *result)
	Get input value. More...

Detailed Description

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

Definition in file pca95xx.c.

Function Documentation

pca95xx_configure()

bool pca95xx_configure	(	struct pca95xx *	dev,
		uint8_t	val,
		bool	blocking
	)

Configure PCA95XX.

Parameters

[in]	dev	address to pca95xx 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 pca95xx.c.

References blocking, dev, i2c_blocking_transmit(), i2c_transmit(), I2CTransDone, I2CTransFailed, I2CTransSuccess, PCA95XX_CONFIG_REG, and val.

Referenced by gpio_ext_pca95xx_lazy_init(), gpio_ext_pca95xx_setup_input(), gpio_ext_pca95xx_setup_output(), multi_ranger_init(), and multi_ranger_periodic().

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pca95xx_get_input()

bool pca95xx_get_input	(	struct pca95xx *	dev,
		uint8_t	mask,
		uint8_t *	result
	)

Get input value.

Parameters

[in]	dev	address to pca95xx device
[in]	mask	input pins
[out]	input	register with mask applied Note: always blocking

Returns

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

Definition at line 78 of file pca95xx.c.

References dev, i2c_blocking_transceive(), I2CTransDone, I2CTransFailed, I2CTransSuccess, and PCA95XX_INPUT_REG.

Referenced by gpio_ext_pca95xx_get().

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pca95xx_init()

void pca95xx_init	(	struct pca95xx *	dev,
		struct i2c_periph *	i2c_p,
		uint8_t	addr
	)

Init PCA95XX.

Parameters

[in]	dev	address to pca95xx device
[in]	i2c_p	addres of i2c bus
[in]	addr	i2c address

Definition at line 30 of file pca95xx.c.

References dev, and I2CTransDone.

Referenced by gpio_ext_pca95xx_lazy_init(), and multi_ranger_init().

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pca95xx_set_output()

bool pca95xx_set_output	(	struct pca95xx *	dev,
		uint8_t	mask,
		bool	blocking
	)

Set output value.

Parameters

[in]	dev	address to pca95xx 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 pca95xx.c.

References blocking, dev, i2c_blocking_transmit(), i2c_transmit(), I2CTransDone, I2CTransFailed, I2CTransSuccess, and PCA95XX_OUTPUT_REG.

Referenced by gpio_ext_pca95xx_clear(), gpio_ext_pca95xx_set(), multi_ranger_init(), and multi_ranger_periodic().

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