From: Russell King <rmk@arm.linux.org.uk>
To: Ed Vance <EdV@macrolink.com>
Cc: antonelloderosa@inwind.it,
"'root@chaos.analogic.com'" <root@chaos.analogic.com>,
'linux-serial' <linux-serial@vger.kernel.org>,
'linux-kernel' <linux-kernel@vger.kernel.org>
Subject: Re: Controlling the serial port at kernel level
Date: Thu, 2 May 2002 21:09:26 +0100 [thread overview]
Message-ID: <20020502210926.H24630@flint.arm.linux.org.uk> (raw)
In-Reply-To: <11E89240C407D311958800A0C9ACF7D13A77CF@EXCHANGE>; from EdV@macrolink.com on Thu, May 02, 2002 at 11:31:45AM -0700
On Thu, May 02, 2002 at 11:31:45AM -0700, Ed Vance wrote:
> That will get the UART initialized and held in an
> operational state while you program the MCR register from inside
> the kernel to change the modem signal states.
You don't need the UART initialised to wiggle the RTS and DTR signals -
as far as standard ports go (rather than the fancy ones that do flow
control), they're just simple IO lines.
--
Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux
http://www.arm.linux.org.uk/personal/aboutme.html
next prev parent reply other threads:[~2002-05-02 20:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-02 18:31 Controlling the serial port at kernel level Ed Vance
2002-05-02 20:09 ` Russell King [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-05-02 13:27 antonelloderosa
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