From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.71) id 1V3RSM-0003Lt-16 for mharc-grub-devel@gnu.org; Sun, 28 Jul 2013 09:56:18 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41983) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V3RSF-0003LP-Hr for grub-devel@gnu.org; Sun, 28 Jul 2013 09:56:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1V3RS9-0007st-I5 for grub-devel@gnu.org; Sun, 28 Jul 2013 09:56:11 -0400 Received: from smtp.volny.cz ([2001:4de8:71c:62::33]:59711) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V3RS9-0007sH-Cg for grub-devel@gnu.org; Sun, 28 Jul 2013 09:56:05 -0400 Received: from [192.168.6.11] (unknown [193.86.90.90]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: starous@volny.cz) by smtp.volny.cz (Postfix) with ESMTPSA id 1D6FF260AB0 for ; Sun, 28 Jul 2013 15:56:02 +0200 (CEST) Message-ID: <51F522F1.1030507@volny.cz> Date: Sun, 28 Jul 2013 15:56:01 +0200 From: =?UTF-8?B?QWxlxaEgTmVzcnN0YQ==?= User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7 MIME-Version: 1.0 To: The development of GNU GRUB Subject: Re: [grub-devel] loongson-2f mini-pc (fuloong) elf image generation. References: <1351547244.2511.11.camel@king.jenpiliny.cz> <1351628069.2535.33.camel@king.jenpiliny.cz> <51E00C7F.6080700@gmail.com> <51E45E19.6080401@volny.cz> <51E59E32.4080608@volny.cz> <51E59EFE.6080301@volny.cz> <51E81366.10804@volny.cz> <51EB078D.3070303@volny.cz> <51EBFE3F.2020509@volny.cz> <754db81ef5b348866aa9285809d3889d@mail.volny.cz> <51F2960A.6030805@volny.cz> <51F2AE5E.5070700@gmail.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2001:4de8:71c:62::33 X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: The development of GNU GRUB List-Id: The development of GNU GRUB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 28 Jul 2013 13:56:17 -0000 >>> ... >>> Hmm, I can access one laptop with 9 pins RS-232 port. The mini-pc is >>> a 3 pins serial port. I don't currently have a way to connect them. >>> >>> I'll have to buy a some cable/converter... >>> >> Cable is shipped with fuloong. It's straight passive cable to RS-232. > > Thanks for that... I just found it (took me a while, since I totally > forgot about it)... > > I still need to buy a male to female adapter, and/or a serial to usb > converter. The laptop has a male port, and the lemote cable has a > RS-232 male port also, :-( Perhaps those are easier to find... It is usually possible to buy/rent/borrow serial null-modem cable - it should have female CANON 9-pin connector on both sides. (Don't mix up null-modem and pass-through cable! Pass-through cable will not damage Your computer(s), but it will not work in our case... Pass-through cables were used to connect PC with telephone modems. For debugging, i.e. to connecting two PCs peer to peer via serial line, it is necessary null-modem cable which have "crossed" some signals, at least RxD with TxD.) Or You can buy two female CANON 9-pin connectors and connect together these pins: 1-st side 2-nd side ------------------- 2 - 3 3 - 2 5 - 5 (i.e., You need only three wires) You can find many other wire-diagrams of null-modem cable with more complex wiring on the Internet - You can use most of them, of course - but the three connections, which I wrote above, should be enough - because another signals should be not used in serial debugging case. If You are not friend of soldering gun, You can also use part of flat ribbon cable and related clamping connector e.g. like this: http://www.conrad.com/ce/en/product/711357/Assmann-WSW-A-DSF-09-LPIIIZ-D-SUB-For-Ribbon-Cable-Number-of-pins-9-Plug-Cable-Mount-Cutting-clamping-technology BR, Ales > > Thanks, >