Messages in this thread | | | Date | Tue, 16 Nov 2010 17:20:13 +0000 | From | Alan Cox <> | Subject | Re: [PATCH] Documentation about RS485 serial communications |
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On Tue, 16 Nov 2010 10:13:22 -0600 Matt Schulte <matts@commtech-fastcom.com> wrote:
> On Tue, Nov 16, 2010 at 8:30 AM, Pavel Machek <pavel@ucw.cz> wrote: > > Hi! > > > >> Documentation about RS485 serial communications > > > > I have seen hardware (kontron pmc-6l) that was capable of switching > > between RS232, RS485 and one other standard by software. > > > > Is such hw common? If so, should we have standard interface? > > In my opinion this type of card is not that common. Generally > speaking the achievable baud rates for this type of multi-protocol > card are very limited because of limitations of the transceiver chips. > It seems that most of the time people would rather have a faster > serial port than one that does several different voltages
If there are two types in common use then thats enough to say we should have a common interface IMHO
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