pwm_cap.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	P_OUT   P9_21
	The pin for PWM output.
#define	P_IN   P9_42
	The pin for CAP input.

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 measure the frequency and duty cycle of a pulse train with a eCAP module input. The program sets another pin as eHRPWM output to generate a pulse width modulated signal as source for the measurement. The output can be changed by some keys, the frequency and duty cycle of the input is shown continuously in the terminal output. Find a functional description in section pwm_cap.

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

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

Since

0.0

Definition in file pwm_cap.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 pwm_cap.c.

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main()

int main	(	int	argc,
		char **	argv
	)

The main function.

create new driver structure

Definition at line 61 of file pwm_cap.c.

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