gpio.c File Reference

#include "gpio.h"

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Go to the source code of this file.

Functions
int	gpio_unexport (int num)
int	gpio_export (int num)
int	gpio_dir (int num, rl_direction dir)
int	gpio_interrupt (int num, rl_edge edge)
int	gpio_set_value (int num, int val)
int	gpio_get_value (int num)
int	gpio_wait_interrupt (int num, int timeout)

Function Documentation

int gpio_dir	(	int	num,
		rl_direction	dir
	)

Set direction of GPIO.

Parameters

num	Linux GPIO number.
dir	Direction.

Returns

SUCCESS in case of success, FAILURE otherwise.

Definition at line 62 of file gpio.c.

References ERROR, FAILURE, GPIO_PATH, MAX_PATH_LENGTH, OUT, rl_log(), and SUCCESS.

Referenced by gpio_setup(), and hw_init().

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int gpio_export

(

int

num

)

Export (activate) a GPIO.

Parameters

num	Linux GPIO number.

Returns

SUCCESS in case of success, FAILURE otherwise.

Definition at line 37 of file gpio.c.

References ERROR, FAILURE, GPIO_PATH, rl_log(), and SUCCESS.

Referenced by gpio_setup(), and hw_init().

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int gpio_get_value

(

int

num

)

Get GPIO value.

Parameters

num	Linux GPIO number.

Returns

GPIO value, FAILURE on failure.

Definition at line 161 of file gpio.c.

References ERROR, FAILURE, GPIO_PATH, MAX_PATH_LENGTH, and rl_log().

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int gpio_interrupt	(	int	num,
		rl_edge	edge
	)

Set direction of GPIO interrupt edge.

Parameters

num	Linux GPIO number.
edge	Edge direction.

Returns

SUCCESS in case of success, FAILURE otherwise.

Definition at line 92 of file gpio.c.

References BOTH, ERROR, FAILURE, FALLING, GPIO_PATH, MAX_PATH_LENGTH, NONE, RISING, rl_log(), and SUCCESS.

Referenced by gpio_setup().

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int gpio_set_value	(	int	num,
		int	val
	)

Set value of GPIO.

Parameters

num	Linux GPIO number.
val	Value (0 or 1).

Returns

SUCCESS in case of success, FAILURE otherwise.

Definition at line 132 of file gpio.c.

References ERROR, FAILURE, GPIO_PATH, MAX_PATH_LENGTH, rl_log(), and SUCCESS.

Referenced by hw_close(), hw_init(), and hw_sample().

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int gpio_unexport

(

int

num

)

Copyright (c) 2016-2017, ETH Zurich, Computer Engineering Group Unexport (deactivate) a GPIO.

Parameters

num	Linux GPIO number.

Returns

SUCCESS in case of success, FAILURE otherwise.

Definition at line 12 of file gpio.c.

References ERROR, FAILURE, GPIO_PATH, rl_log(), and SUCCESS.

Referenced by hw_close().

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int gpio_wait_interrupt	(	int	num,
		int	timeout
	)

Wait on GPIO interrupt.

Parameters

num	Linux GPIO number.
timeout	Maximum waiting time (in ms). Set to 0 for infinite time out.

Returns

SUCCESS in case of interrupt, FAILURE otherwise.

Definition at line 188 of file gpio.c.

References ERROR, FAILURE, GPIO_PATH, MAX_PATH_LENGTH, MIN_BUTTON_TIME, and rl_log().

Referenced by main().

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