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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next prev parent 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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