From owner-freebsd-arm@FreeBSD.ORG Tue Sep 30 00:16:40 2014 Return-Path: Delivered-To: freebsd-arm@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id D0DF4D6 for ; Tue, 30 Sep 2014 00:16:40 +0000 (UTC) Received: from alogt.com (alogt.com [69.36.191.58]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id A7CE0DD0 for ; Tue, 30 Sep 2014 00:16:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=alogt.com; s=default; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Subject:Cc:To:From:Date; bh=y9IWHjdHkr0uIqoD7rf6S/eVFQNj90TZdvHHzlae7os=; b=RonkXncfd0hqLBNA5rdSdt2rtnI2TsNJl1/k5CNEBQOlV4THJJJvlxNtq9VdtbVpF+8n0QwIa1YE9R5qVWMeGJfNyob3N0/BP3mnYK0NOYc2ScX1QCT9zwurKnAWp1DxYX+PcJVOCYgF3GUeLEXe5ahlZyWr1xMTB6AbT0yK9uk=; Received: from [182.5.218.90] (port=18446 helo=X220.alogt.com) by sl-508-2.slc.westdc.net with esmtpsa (SSLv3:AES128-SHA:128) (Exim 4.82) (envelope-from ) id 1XYl7J-002K1W-7R; Mon, 29 Sep 2014 18:16:34 -0600 Date: Tue, 30 Sep 2014 08:16:18 +0800 From: Erich Dollansky To: Luiz Otavio O Souza Subject: Re: Documentation for using GPIO Message-ID: <20140930081618.122a0c79@X220.alogt.com> In-Reply-To: References: <20140929080337.46bbb5a3@X220.alogt.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - sl-508-2.slc.westdc.net X-AntiAbuse: Original Domain - freebsd.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - alogt.com X-Get-Message-Sender-Via: sl-508-2.slc.westdc.net: authenticated_id: erichsfreebsdlist@alogt.com X-Source: X-Source-Args: X-Source-Dir: Cc: "freebsd-arm@freebsd.org" X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 30 Sep 2014 00:16:40 -0000 Hi Luiz, On Mon, 29 Sep 2014 16:27:26 -0300 Luiz Otavio O Souza wrote: > > is there some documentation available of how to use GPIO on a > > Raspberry Pi B+ than man gpio, man gpioctl etc? > > > Unfortunately not, there is the Wiki page > (https://wiki.freebsd.org/FreeBSD/GPIO) but it doesn't add much. > I ave read this. > But we can try to help you whenever possible, just post your questions > and we'll try to address them. I am currently working on a C program which should use GPIO to switch relais and read the state of switches via GPIO. I would like to make this program as simple as possible by creating first a layer which provides then functions like set (Pin), reset (Pin) and read (Pin) only. Of course plus the things needed to open, close and configure the interface. The best I have found until now are the sources of gpioctl. I am currently looking at the source. Is this the best start? Erich