From: Eugene Surovegin <ebs@ebshome.net>
To: Toni Van Remortel <t.vanremortel@ha.be>
Cc: Embedded PPC <linuxppc-embedded@lists.linuxppc.org>
Subject: Re: EP405 GPIO signal problem
Date: Thu, 20 Nov 2003 10:19:22 -0800 [thread overview]
Message-ID: <20031120181921.GA3365@gate.ebshome.net> (raw)
In-Reply-To: <1069336934.1290.6.camel@toni>
On Thu, Nov 20, 2003 at 03:02:15PM +0100, Toni Van Remortel wrote:
> I have an RTAI powered kernel module which outputs 32 bits data via the
> EP405 GPIO ports from the IBM 405GP CPU. These outputs are multiplexed
> with other signals.
> Problem: when I output the 32 bits as one like this:
> writel( buffer, (u32)gpio_base_addr+GPIO0_OR );
> (where buffer is of u32 type)
One thing which looks strange to me. Are you sure you can use 32 GPIO
pins?
This is impossible because 405GP has only 23, and I doubt you can use
even this number, because some of the pins are shared with IRQ and
PerCSx lines.
Eugene
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2003-11-20 18:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-20 14:02 EP405 GPIO signal problem Toni Van Remortel
2003-11-20 15:21 ` Toni Van Remortel
2003-11-20 18:19 ` Eugene Surovegin [this message]
2003-11-21 8:21 ` Toni Van Remortel
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