From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4BF95796.6030504@domain.hid> Date: Sun, 23 May 2010 18:28:06 +0200 From: Wolfgang Grandegger MIME-Version: 1.0 References: <4BF8F73D.3070008@domain.hid> <4BF94DE3.90001@domain.hid> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai-help] problem with serial example List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Everett Wang Cc: xenomai@xenomai.org On 05/23/2010 06:19 PM, Everett Wang wrote: > On Sun, May 23, 2010 at 11:46 PM, Wolfgang Grandegger wrote: >> There are other possibilities to interact with Linux, e.g. telnet, >> slogin or netcat. But it's always good to have a console. >> > I guess I need a USB to ethernet for these. Yes. ... >> All three uarts are occupied by Linux and you cannot use them as >> rtserial. First you need to release at least one of them. What Linux >> config do you use for your board? > > I didn't do any configuration. Do you mean to config these during kernel > configuration? Can you show us the .config of your kernel? Some more insights: I think the serial ports for the beagle boards are configured in: http://lxr.linux.no/#linux+v2.6.34/arch/arm/mach-omap2/serial.c Therein you find entries like: http://lxr.linux.no/#linux+v2.6.34/arch/arm/mach-omap2/serial.c#L82 As you can see, a regshift of 2 is used, which is not yet supported by the 16550A RTDM driver. Should not be a big deal to add it, though. Also, as "baud_base" you should use OMAP24XX_BASE_BAUD. Wolfgang.