From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.icid.cu ([200.55.133.90]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZOlz5-0007RT-Fs for barebox@lists.infradead.org; Mon, 10 Aug 2015 12:15:22 +0000 Received: from icid.cu ([10.10.0.3]) by mail.icid.cu (8.13.8/8.13.8) with ESMTP id t7ABElHQ013894 for ; Mon, 10 Aug 2015 07:14:50 -0400 Received: from [10.10.8.78] by icid.cu (Cipher TLSv1:RC4-MD5:128) (MDaemon PRO v9.6.1) with ESMTP id md50008243970.msg for ; Mon, 10 Aug 2015 07:31:38 -0400 Message-ID: <55C8960F.8000700@icid.cu> Date: Mon, 10 Aug 2015 08:16:15 -0400 From: Roberto Alejandro Espi Munoz MIME-Version: 1.0 References: <55C4C388.9060102@icid.cu> <20150807194104.b02642e26c441e906a1deeca@gmail.com> <55C50118.3080202@icid.cu> <20150808182330.a52abdc75132a0f1fafd440e@gmail.com> In-Reply-To: <20150808182330.a52abdc75132a0f1fafd440e@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: serial port weird chars ... To: barebox@lists.infradead.org Supposing that's the issue, is there an option in barebox that I could use to circumvent this ? Thanks for the replies ... On 08/08/2015 11:23 AM, Antony Pavlov wrote: > On Fri, 07 Aug 2015 15:03:52 -0400 > Roberto Alejandro Espi Munoz wrote: > >> Both scenarios work well on another host. On my host serial port when >> interacting with one bootloader the communication is fine and with >> barebox fails. When using a USB-serial adapter there's no problem. >> Perhaps there's a problem on my board but why does the first connection >> work and with barebox doesn't ? > May be barebox programs UART clocks in a slightly different way than S3C2440A USB Downloader does, > so waveform for one character is too short or too long for your host computer UART receiver? > > IMHO a logic analyzer can help you. Use it to compare output mini2440 UART waveform from USB Downloader > with output UART waveform from barebox. > >> On 08/07/2015 12:41 PM, Antony Pavlov wrote: >>> On Fri, 07 Aug 2015 10:41:12 -0400 >>> Roberto Alejandro Espi Munoz wrote: >>> >>>> Hi ... I'm currently having some trouble with displaying characters >>>> correctly in my terminal. I'm using a board equivalent to the >>>> mini2440. This one has a NOR and a NAND. I connect to it over a serial >>>> port interface. When I boot up the board in debug mode I'm able to see >>>> clearly the messages displayed by the S3C2440A USB Downloader which is >>>> copied in the NOR interface, I then download my barebox binary over the >>>> USB interface and when it boots I get a lot of weird characters on >>>> screen. The console seems to respond correctly, I issue for example the >>>> "reset" command and it resets but I can't make out what is displayed. >>>> I was guessing at first a serial port configuration problem on my >>>> operating system (I use Linux), tried it over on Windows and same >>>> effect, the first bootloader works great and barebox when starting just >>>> mangles the characters. >>>> >>>> The other weird problem is than when I use a USB-Serial converter to >>>> connect to the board's serial port everything works ! >>>> >>>> I'm currently using barebox 2012.09 and OpenSuse Linux 13.2 >>>> >>>> Any ideas ? thanks >>> You have the problem if you use your host computer motherboard serial port (no matter, Linux or Windows), >>> isn't it? >>> And no problem if you use USB-Serial dongle. So it looks like host serial port problem. >>> >>> Could you try to connect the board to another host computer? >>> >>> -- >>> Best regards, >>> Antony Pavlov >>> >>> _______________________________________________ >>> barebox mailing list >>> barebox@lists.infradead.org >>> http://lists.infradead.org/mailman/listinfo/barebox >> >> >> _______________________________________________ >> barebox mailing list >> barebox@lists.infradead.org >> http://lists.infradead.org/mailman/listinfo/barebox > _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox