From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Tosoni" Subject: RE: [PATCH/RFC] 8250: Auto RS485 direction control Date: Tue, 5 Aug 2008 11:34:56 +0200 Message-ID: <001901c8f6de$85c4d0e0$2e01a8c0@acksys.local> References: Mime-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Return-path: Received: from smtp03.msg.oleane.net ([62.161.4.3]:57223 "EHLO smtp03.msg.oleane.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753599AbYHJO7G (ORCPT ); Sun, 10 Aug 2008 10:59:06 -0400 In-Reply-To: Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: 'Grant Edwards' , linux-serial@vger.kernel.org I agree with your understanding of the standard. I guess that the Oxford guys wanted to keep the possibility of using both RTS input flow control AND half-duplex. JP Tosoni > -----Original Message----- > From: linux-serial-owner@vger.kernel.org > [mailto:linux-serial-owner@vger.kernel.org]On Behalf Of Grant Edwards > Sent: Monday, August 04, 2008 7:46 PM > To: linux-serial@vger.kernel.org > Subject: Re: [PATCH/RFC] 8250: Auto RS485 direction control > > > On 2008-08-04, Tosoni wrote: > > > Last remark: > > > > Interestingly, the RTS envelope on the Oxford chips is > > implemented with... the DTR pin. On our cards we have a piece > > of hardware which redirect the uart DTR pin to the external > > RTS in this case. > > Well, that's just plain wrong. The RS-232 standard was quite > clear that RTS is what's used to enable transmission. ;) > > -- > Grant Edwards grante Yow! I > have a VISION! It's > at a RANCID > double-FISHWICH on > visi.com an ENRICHED BUN!! > > -- > To unsubscribe from this list: send the line "unsubscribe > linux-serial" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >