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Subject: Re: HC-SR04 and FreeBSD
From: Rui Paulo <rpaulo@FreeBSD.org>
In-Reply-To: <CAG4HiT6wwbmSA_KWsgHOqdeZVOCUsdhRxDhMubvkG1tEwVH5Sw@mail.gmail.com>
Date: Wed, 20 Aug 2014 21:51:08 -0700
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To: Evandro Nunes <evandronunes12@gmail.com>
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On Aug 20, 2014, at 21:48, Evandro Nunes <evandronunes12@gmail.com> wrote:

> hello,
> 
> ive got a ultrasonic sensor model HC-SR04 and a beaglebone black as well as
> a cubieboard2, both running FreeBSD 11 built from crochet and wiki
> instructions
> 
> thanks to the help from loos@ I could manage to use a 5v relay with BBB
> now, how can I read data from HC-SR04 sensor? do we have any library
> available? or do we have any GPIO utility to do that?
> btw how can I read values from GPIO pins when they are set to input?

I wrote a library to handle GPIO on FreeBSD:

	https://bitbucket.org/rpaulo/libgpio

You can also use the gpioctl utility in FreeBSD to read values.

--
Rui Paulo