button.c File Reference

Example: get state of a button. More...

#include "stdio.h"
#include <termios.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/time.h>
#include "libpruio/pruio.h"
#include "libpruio/pruio_pins.h"

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Macros
#define	_GNU_SOURCE   1
	Message for the compiler.
#define	PIN   P8_07
	The header pin to use.

Functions
int	isleep (unsigned int mseconds)
	Wait for keystroke or timeout. More...
int	main (int argc, char **argv)
	The main function. More...

Detailed Description

Example: get state of a button.

This file contains an example on how to use libpruio to get the state of a button connetect to a GPIO pin on the beaglebone board. Here pin 7 on header P8 is used as input with pullup resistor. Connect the button between P8_07 (GPIO input) and P8_01 (GND). Find a functional description in section button.

Licence: GPLv3, Copyright 2014-2023 by Thomas{ doT ]Freiherr[ At ]gmx[ DoT }net

Compile by: gcc -Wall -o button button.c -lpruio

Since

0.0

Definition in file button.c.

Function Documentation

isleep()

int isleep

(

unsigned int

mseconds

)

Wait for keystroke or timeout.

Parameters

mseconds

Timeout value in milliseconds.

Returns

0 if timeout, 1 if input available, -1 on error.

Wait for a keystroke or timeout and return which of the events happened.

Definition at line 40 of file button.c.

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main()

int main	(	int	argc,
		char **	argv
	)

The main function.

create new driver structure

Definition at line 59 of file button.c.

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