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From: Philip Balister <philip@balister.org>
To: "linux-omap@vger.kernel.org" <linux-omap@vger.kernel.org>
Subject: GPMC setup help
Date: Tue, 27 Oct 2009 16:41:41 -0400	[thread overview]
Message-ID: <4AE75B05.7010701@balister.org> (raw)

I've been going round and round on this for a couple of days. I have a 
logic analyzer (cheap USB, that is why come edges are not quite synced) 
attached to the gpmc pins on a logicpd dev board. The read cycle timings 
are what I expect.

The write cycle seems to do one cycle OK, then thing go into the weeds.

Here are the values I write into the registers:

GPMC_CONFIG1 reg: 1200 

GPMC_CONFIG2 reg: 40400 

GPMC_CONFIG3 reg: 20201 

GPMC_CONFIG4 reg: 4030403 

GPMC_CONFIG5 reg: 1040505 

GPMC_CONFIG6 reg: 4030000

and here is a screen shot of the logic analyzer:

http://balister.dyndns.org:8008/~balister/gpmc-write.png

Philip

             reply	other threads:[~2009-10-27 20:41 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-10-27 20:41 Philip Balister [this message]
2009-11-09 22:26 ` GPMC setup help Tony Lindgren

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