qep.c File Reference

Example: PWM output and CAP input. More...

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

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Macros
#define	_GNU_SOURCE   1
	Message for the compiler.
#define	PMX   4095
	Default PMax value.
#define	VHz   25
	The frequency for speed measurement.

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: PWM output and CAP input.

This file contains an example on how to use libpruio to analyse pulse trains from a QEP sensor. The sensor signals can either come from a real sensor. Or, to avoid the need of a real sensor, the signals can get simulated by PWM output which is generated by this program. Find a functional description in section qep.

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

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

Since

0.0

Definition in file qep.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 42 of file qep.c.

main()

int main	(	int	argc,
		char **	argv
	)

The main function.

create new driver structure

Definition at line 61 of file qep.c.

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