From: Wolfgang Denk <wd@denx.de>
To: "FCG WANG Baohua" <Baohua.WANG@alcatel-sbell.com.cn>
Cc: Jack_liu@usish.com, Tsi-Chung.Liew@freescale.com,
linuxppc-embedded@ozlabs.org
Subject: Re: Question about SMC serial port on MPC8270 in u-boot
Date: Wed, 31 Aug 2005 09:03:54 +0200 [thread overview]
Message-ID: <20050831070354.F3D7935258E@atlas.denx.de> (raw)
In-Reply-To: Your message of "Wed, 31 Aug 2005 08:51:29 +0800." <A9DE2BAF233E444FA9C5E77A5825A01E865067@ydmail.sbell.com.cn>
In message <A9DE2BAF233E444FA9C5E77A5825A01E865067@ydmail.sbell.com.cn> you wrote:
>
> When i port the u-boot 1.1.3 on my MPC8270 board, the serial port has
Your question is off topic on this list. Please send U-Boot related
questions to the u-boot-users list instead.
> 1. the Dual port ram cannot be revised manually, but can be revised by
> the u-boot code. What's the problem?
You're doing something wrong.
> 2. the serial_putc() in serial_smc.c is loop forever on "while
> (tbdf->cbd_sc & BD_SC_READY);". How to slove the bug?
Make sure your clocks / BRG's are configured correctly.
> 3. the speed.c calc the wrong cpm, cpu, brg_clk, I had hard coded the
> right cpm, cpu, brg_clk values. But the "m8260_cpm_setbrg()" is still
> wrong? Why?
Your system is misconfigured.
> data structures, they all seems right, but the UART cannot work.
> How could I find the problem?
Fix the problems as you encounter them. If the clocks show up wrong
you should fix this problem first. Then all the rest might just fall
into place.
> Content-Type: text/html;
> Content-Transfer-Encoding: quoted-printable
>
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
> <HTML>
And please don't post HTML.
Best regards,
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
A meeting is an event at which the minutes are kept and the hours are
lost.
prev parent reply other threads:[~2005-08-31 7:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-31 0:51 Question about SMC serial port on MPC8270 in u-boot FCG WANG Baohua
2005-08-31 7:03 ` Wolfgang Denk [this message]
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