From owner-freebsd-hackers Wed Nov 17 13:25:20 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from yana.lemis.com (yana.lemis.com [192.109.197.140]) by hub.freebsd.org (Postfix) with ESMTP id D882A14FED for ; Wed, 17 Nov 1999 13:25:07 -0800 (PST) (envelope-from grog@mojave.sitaranetworks.com) Received: from mojave.sitaranetworks.com (mojave.sitaranetworks.com [199.103.141.157]) by yana.lemis.com (8.8.8/8.8.8) with ESMTP id HAA24064; Thu, 18 Nov 1999 07:54:49 +1030 (CST) (envelope-from grog@mojave.sitaranetworks.com) Message-ID: <19991117162411.27609@mojave.sitaranetworks.com> Date: Wed, 17 Nov 1999 16:24:11 -0500 From: Greg Lehey To: Doug Rabson Cc: Zhihui Zhang , "Kenneth D. Merry" , freebsd-hackers@freebsd.org Subject: Re: Set the baud rate on remote debugging Reply-To: Greg Lehey References: <19991116205031.07184@mojave.sitaranetworks.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: ; from Doug Rabson on Wed, Nov 17, 1999 at 09:10:58PM +0000 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Wednesday, 17 November 1999 at 21:10:58 +0000, Doug Rabson wrote: > On Tue, 16 Nov 1999, Greg Lehey wrote: > >> On Monday, 15 November 1999 at 16:46:50 -0500, Zhihui Zhang wrote: >>> >>> On Mon, 15 Nov 1999, Greg Lehey wrote: >>> >>>> On Monday, 15 November 1999 at 15:13:53 -0700, Kenneth D. Merry wrote: >>>>> Zhihui Zhang wrote... >>>>>> >>>>>> I have set up a remote debugging environment. But I think default 9600 >>>>>> bps is slow. I can use "set remotebaud 19200" on the debugging machine >>>>>> side. How can I set the baud rate on the target machine that is running >>>>>> the debugged kernel? (I press CTRL+ESC+ALT to drop to DDB mode and find >>>>>> no command to set the baud rate). >>>>>> >>>>>> Any help is appreciated. >>>>> >>>>> Use the CONSPEED option in the kernel config file on the target machine. >>>>> e.g.: >>>>> >>>>> options CONSPEED=115200 >>>> >>>> I'm planning to modify ddb to specify the bit rate as a parameter to >>>> the gdb command: >>>> >>>> db> gdb 19200 >>>> Next trap will enter GDB remote protocol mode at 19200 bps >>>> >>>> Comments? >>>> >>> >>> That will be useful. I have just found out that I can use sysctl -w >>> machdep.conspeed=19200 to achieve this. But I can not go higher than >>> 19200. >> >> I set 38400 today, but it ran very badly. I think 19200 is probably >> as high as you want to go, at least until somebody fixes the buffering >> in the UARTs. > > I've always used 57600 and it seems to work fine... I think it depends on your UART hardware. Greg -- Finger grog@lemis.com for PGP public key See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message