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From: Juergen Beisert <jbe@pengutronix.de>
To: barebox@lists.infradead.org
Subject: Re: about the dm9000 in mini2440
Date: Fri, 7 Dec 2012 09:38:35 +0100	[thread overview]
Message-ID: <201212070938.35716.jbe@pengutronix.de> (raw)
In-Reply-To: <5693537.UlV3N7R00O@yiqingliang-pc>

Yi Qingliang wrote:
> I got it finally, but not root cause.
> reproduce:
>
> 1. connect jtag with openjtag(not the official openjtag, but 100ask.net
> produced based on openmoko's).
> 2. use ON/OFF switch on the board
>
> then I got "Wrong databus"
> but if I disconnect the power line, and reconnect it, everything OK.
> and if not connect jtager, and use ON/OFF switch, everyghing OK.
>
> what's the fuck problem?

Good question. The DM9000 uses the EED0 pin to decide if a 16 or 32 bit data 
bus is in use, when the reset signal is gone. Maybe your system does 
not "see" a correct reset.

Regards,
Juergen

-- 
Pengutronix e.K.                              | Juergen Beisert             |
Linux Solutions for Science and Industry      | http://www.pengutronix.de/  |

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  reply	other threads:[~2012-12-07  8:41 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-12-06 15:55 Yi Qingliang
2012-12-06  8:09 ` Juergen Beisert
2012-12-06 16:24   ` Yi Qingliang
2012-12-06 10:56     ` Juergen Beisert
2012-12-07 13:05   ` Yi Qingliang
2012-12-07  8:38     ` Juergen Beisert [this message]
2012-12-07 13:10   ` Yi Qingliang
2012-12-07  8:39     ` Juergen Beisert
2012-12-06 11:27 ` Eric Bénard
2012-12-07  8:41   ` Yi Qingliang
2012-12-07  8:45     ` Juergen Beisert

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