libpruio  0.6.8
Fast and easy Digital/Analog Input/Output for Beaglebones
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
msecondsTimeout 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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