[En-Nut-Discussion] 4-6 serial ports on the ethernut?

[Thiago A. Corrêa]

Hi there,

There is another option, I suppose. Legend says that there is an
atmega128 (atmega1280 I guess) that has 4 uarts in it. But I don't
know if they are selling it already or not.

Regards,
   Thiago A. Correa

On 10/14/06, Przemyslaw Rudy <prudy at audiotech.pl> wrote:
> Hi Ovidiu
>
> I have used simple pld logic to split atmega serial to 4 ports. It was
> very simple solution with minimum software overhead, but of course they
> could not be used simultaneously at the same time.
> There is a tl16c554/ace software driver available that you can use,
> providing you are ready to add tl16c554 hardware to your board. You
> could have then multiple independent serial ports.
>
> Regards
> Przemek
>
>
> Ovidiu wrote:
> > Hi,
> >
> > I am thinking of using a software solution (direct connection of max232 to
> > the i/o port), but i don't know if this is possible with Nutos without some
> > serious programming (or maybe it is easy, but i don't know how...) and I
> > don't have knowledge of any "hardware" chips that can do this. Can you give
> > me some advice on this?
> >
> >
> > Thank you in advance,
> > Ovidiu
> >
> > PS: I forgot to say that I'm going to use Ethernut v1.3H
> >
> > On 10/13/06, Harald Kipp <harald.kipp at egnite.de> wrote:
> >
> >>
> >> Hi Ovidiu,
> >>
> >> The number of serial ports is limited by available RAM only
> >> and 4-6 ports are no problem.
> >>
> >> But I'm not sure, if I got you right. You are talking about
> >> UARTs, right? The ATmega128 got two of them only. What
> >> hardware do you intend to use for the remaining 2-4 UARTs?
> >>
> >> Harald
> >>
> >>
> >> At 12:39 13.10.2006 +0300, you wrote:
> >> >Hello,
> >> >
> >> >
> >> >I am new to Ethernut (in fact I'm new to MCU's) and I am working on a
> >> data
> >> >acquisition system for my diploma project and for this I need to know if
> >> I
> >> >can program 4-6 serial ports on the same Ethernut board (I need to know
> >> if
> >> >NutOS has the software functions to support this).
> >> >
> >> >The ethernut board is working as a "concentrator" gathering information
> >> from
> >> >some smaller AVR's (attiny15) through a serial line and forwarding the
> >> >information to a central computer using eth. In hardware the
> >> modification
> >> is
> >> >very easy, the problem is with the software so my question is if NutOS
> >> has
> >> >support for more serial ports and if not what "simple" solution can I
> >> use.
> >> >
> >> >Thanks,
> >> >Ovidiu Poncea
> >>
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