From: Grant Edwards <grant.b.edwards@gmail.com>
To: linux-serial@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Documentation about RS485 serial communications
Date: Tue, 19 Oct 2010 14:29:48 +0000 (UTC) [thread overview]
Message-ID: <i9ka0s$4ua$1@dough.gmane.org> (raw)
In-Reply-To: 4CBD8EE4.5040808@evidence.eu.com
On 2010-10-19, Claudio Scordino <claudio@evidence.eu.com> wrote:
> +2. HARDWARE-RELATED CONSIDERATIONS
> +
> + Some CPUs (e.g., Atmel AT91) contain a transceiver capable of working both
> + as RS232 and RS485.
Pardon my curiosity, but I've looked at a few AT91 parts, and I've
never seen on with an internal transceiver -- nor does Google seem
able to find any.
Frankly, I'd be pretty surprised, since it would be very difficult
(fab-wise), to build a mircoprocessor with I/O cells capable of
withstanding the voltage levels specified in RS232.
Can you specify to which parts you're referring?
--
Grant Edwards grant.b.edwards Yow! I have the power to
at HALT PRODUCTION on all
gmail.com TEENAGE SEX COMEDIES!!
WARNING: multiple messages have this Message-ID (diff)
From: grant.b.edwards@gmail.com (Grant Edwards)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] Documentation about RS485 serial communications
Date: Tue, 19 Oct 2010 14:29:48 +0000 (UTC) [thread overview]
Message-ID: <i9ka0s$4ua$1@dough.gmane.org> (raw)
In-Reply-To: 4CBD8EE4.5040808@evidence.eu.com
On 2010-10-19, Claudio Scordino <claudio@evidence.eu.com> wrote:
> +2. HARDWARE-RELATED CONSIDERATIONS
> +
> + Some CPUs (e.g., Atmel AT91) contain a transceiver capable of working both
> + as RS232 and RS485.
Pardon my curiosity, but I've looked at a few AT91 parts, and I've
never seen on with an internal transceiver -- nor does Google seem
able to find any.
Frankly, I'd be pretty surprised, since it would be very difficult
(fab-wise), to build a mircoprocessor with I/O cells capable of
withstanding the voltage levels specified in RS232.
Can you specify to which parts you're referring?
--
Grant Edwards grant.b.edwards Yow! I have the power to
at HALT PRODUCTION on all
gmail.com TEENAGE SEX COMEDIES!!
WARNING: multiple messages have this Message-ID (diff)
From: Grant Edwards <grant.b.edwards@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Documentation about RS485 serial communications
Date: Tue, 19 Oct 2010 14:29:48 +0000 (UTC) [thread overview]
Message-ID: <i9ka0s$4ua$1@dough.gmane.org> (raw)
In-Reply-To: 4CBD8EE4.5040808@evidence.eu.com
On 2010-10-19, Claudio Scordino <claudio@evidence.eu.com> wrote:
> +2. HARDWARE-RELATED CONSIDERATIONS
> +
> + Some CPUs (e.g., Atmel AT91) contain a transceiver capable of working both
> + as RS232 and RS485.
Pardon my curiosity, but I've looked at a few AT91 parts, and I've
never seen on with an internal transceiver -- nor does Google seem
able to find any.
Frankly, I'd be pretty surprised, since it would be very difficult
(fab-wise), to build a mircoprocessor with I/O cells capable of
withstanding the voltage levels specified in RS232.
Can you specify to which parts you're referring?
--
Grant Edwards grant.b.edwards Yow! I have the power to
at HALT PRODUCTION on all
gmail.com TEENAGE SEX COMEDIES!!
next prev parent reply other threads:[~2010-10-19 14:29 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-29 7:16 [PATCH] atmel_serial: Atmel RS485 support v2 Claudio Scordino
2010-03-29 7:16 ` Claudio Scordino
2010-03-29 19:44 ` Ryan Mallon
2010-03-29 19:44 ` Ryan Mallon
2010-03-30 9:07 ` Claudio Scordino
2010-03-30 9:07 ` Claudio Scordino
2010-03-30 19:37 ` Ryan Mallon
2010-03-30 19:37 ` Ryan Mallon
2010-04-08 7:58 ` Claudio Scordino
2010-04-08 7:58 ` Claudio Scordino
2010-04-08 9:01 ` Russell King - ARM Linux
2010-04-08 9:01 ` Russell King - ARM Linux
2010-04-08 10:13 ` Alan Cox
2010-04-08 10:13 ` Alan Cox
2010-04-08 13:16 ` Claudio Scordino
2010-04-08 13:16 ` Claudio Scordino
2010-04-08 13:42 ` Alan Cox
2010-04-08 13:42 ` Alan Cox
2010-05-26 13:18 ` Nicolas Ferre
2010-05-26 13:18 ` Nicolas Ferre
2010-05-27 8:37 ` Claudio Scordino
2010-05-27 8:37 ` Claudio Scordino
2010-05-27 9:57 ` Nicolas Ferre
2010-05-27 9:57 ` Nicolas Ferre
2010-05-27 10:29 ` Wolfram Sang
2010-05-27 10:29 ` Wolfram Sang
2010-05-28 15:05 ` Claudio Scordino
2010-05-28 15:05 ` Claudio Scordino
2010-08-11 9:26 ` [PATCH] Documentation about RS485 serial communications Claudio Scordino
2010-08-11 9:26 ` Claudio Scordino
2010-08-11 10:02 ` Philippe De Muyter
2010-08-11 10:02 ` Philippe De Muyter
2010-08-11 15:32 ` Randy Dunlap
2010-08-11 15:32 ` Randy Dunlap
2010-08-11 19:58 ` Claudio Scordino
2010-08-11 19:58 ` Claudio Scordino
2010-08-14 12:50 ` Claudio Scordino
2010-08-14 12:50 ` Claudio Scordino
2010-08-15 22:02 ` Randy Dunlap
2010-08-15 22:02 ` Randy Dunlap
2010-08-15 22:19 ` Russell King - ARM Linux
2010-08-15 22:19 ` Russell King - ARM Linux
2010-10-19 12:28 ` Claudio Scordino
2010-10-19 12:28 ` Claudio Scordino
2010-10-19 14:29 ` Grant Edwards [this message]
2010-10-19 14:29 ` Grant Edwards
2010-10-19 14:29 ` Grant Edwards
2010-10-19 15:27 ` Alexander Stein
2010-10-19 15:27 ` Alexander Stein
2010-10-19 17:22 ` Grant Edwards
2010-10-19 17:22 ` Grant Edwards
2010-10-20 7:36 ` Nicolas Ferre
2010-10-20 8:00 ` Alexander Stein
2010-10-20 8:00 ` Alexander Stein
2010-10-20 18:56 ` Alan Cox
2010-10-20 18:56 ` Alan Cox
2010-10-24 11:29 ` Claudio Scordino
2010-10-24 11:29 ` Claudio Scordino
2010-10-28 15:10 ` Chris Down
2010-10-28 15:31 ` Claudio Scordino
2010-10-28 16:30 ` Chris Down
2010-11-10 9:17 ` Nicolas Ferre
2010-11-10 9:17 ` Nicolas Ferre
2010-11-10 17:28 ` Greg KH
2010-11-10 17:28 ` Greg KH
2010-11-11 10:22 ` Claudio Scordino
2010-11-11 10:22 ` Claudio Scordino
2010-11-16 14:30 ` Pavel Machek
2010-11-16 14:30 ` Pavel Machek
2010-11-16 14:30 ` Pavel Machek
2010-11-16 14:58 ` Tosoni
2010-11-16 15:52 ` Grant Edwards
2010-11-16 15:23 ` Grant Edwards
2010-11-16 15:23 ` Grant Edwards
2010-11-16 15:28 ` Alexander Stein
2010-11-16 15:28 ` Alexander Stein
2010-11-16 16:13 ` Matt Schulte
2010-11-16 16:13 ` Matt Schulte
2010-11-16 16:28 ` Grant Edwards
2010-11-16 18:41 ` Matt Schulte
2010-11-16 18:41 ` Matt Schulte
2010-11-16 18:41 ` Matt Schulte
2010-11-16 19:29 ` Grant Edwards
2010-11-16 17:20 ` Alan Cox
2010-11-16 17:20 ` Alan Cox
2010-11-16 18:03 ` Grant Edwards
2010-11-16 20:04 ` Alan Cox
2010-11-16 20:04 ` Alan Cox
2010-11-30 19:19 ` Pavel Machek
2010-11-30 19:19 ` Pavel Machek
2010-05-28 9:42 ` [PATCH] atmel_serial: Atmel RS485 support v2 Haavard Skinnemoen
2010-05-28 9:42 ` Haavard Skinnemoen
2010-05-28 13:54 ` [PATCH] MAINTAINERS: some Atmel drivers change maintainer Nicolas Ferre
2010-05-28 13:54 ` Nicolas Ferre
2010-05-28 13:31 ` Haavard Skinnemoen
2010-05-28 13:31 ` Haavard Skinnemoen
2010-06-11 7:23 ` Nicolas Ferre
2010-06-11 7:23 ` Nicolas Ferre
-- strict thread matches above, loose matches on Subject: below --
2010-08-11 20:20 [PATCH] Documentation about RS485 serial communications Randy Dunlap
2010-08-11 20:23 ` Randy Dunlap
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