Reply by Peter Jakacki●September 20, 20072007-09-20
ratemonotonic wrote:
> Thanks very much it looks like it will suit my requirements will have
> a read of the spec.
>
> Just to answer some ppl confused by the requirement for 3 RS232 - it
> will be used to switch between three types of modems in a small
> submarine ( one acoustic and two radio frequency)!
> How exciting is that!
>
Hi rate, if it's just switching between modems this is the product we
use in aviation (scroll down to the CE0063 Minimux)
http://www.cescom.com.au/new/products/products.html
It has 4 ports plus these units can be daisy chained to expand them.
*Peter*
Reply by Vladimir Vassilevsky●September 19, 20072007-09-19
"ratemonotonic" <niladri1979@gmail.com> wrote in message
news:1190143739.528133.230640@y42g2000hsy.googlegroups.com...
> On Sep 18, 5:57 pm, pbr...@netburner.com wrote:
> Just to answer some ppl confused by the requirement for 3 RS232 - it
> will be used to switch between three types of modems in a small
> submarine ( one acoustic and two radio frequency)!
Do you have to work with all three modems at the same time? Why can't you
just multiplex them to one port?
VLV
P.S. Still you have to get a PC :)
Reply by Robert Adsett●September 18, 20072007-09-18
In article <1190056305.597740.203820@19g2000hsx.googlegroups.com>,
ratemonotonic says...
> Hi All ,
>
> Does any one know an off the shelf (and cheap) development board with
> 3 RS232 ports?
Rabbit? Nice modules and you can even get a C compiler from a third
party.
They include something they call a C compiler but it has a number of
incompatibilities with standard C. For small projects you might be able
to use it though.
Robert
--
Posted via a free Usenet account from http://www.teranews.com
Reply by ratemonotonic●September 18, 20072007-09-18
Thanks very much it looks like it will suit my requirements will have
a read of the spec.
Just to answer some ppl confused by the requirement for 3 RS232 - it
will be used to switch between three types of modems in a small
submarine ( one acoustic and two radio frequency)!
How exciting is that!
Rate
PS - Old PC ! eh?
PPS - have asked the question dozens of times ? eh?
Reply by ●September 18, 20072007-09-18
>Hi All ,
>
>Does any one know an off the shelf (and cheap) development board with
>3 RS232 ports?
>
>Thanks in advance for any help.
>
>Rate
Reply by Vladimir Vassilevsky●September 18, 20072007-09-18
Colin Paul Gloster wrote:
> On 2007-09-17, Vladimir Vassilevsky <antispam_bogus@hotmail.com>
> wrote:
>
> |> Does any one know an off the shelf (and cheap) development board with|
> |> 3 RS232 ports? |
> |Get an old PC." |
>
> An old PC would have one RS232 port instead of three of them.
????
An old PC has at least two RS-232 ports, and you can easily add another
two. Having more then four COM ports on the old PC is possible although
it is not as trivial. However you can get a newer PC and enjoy up to 16
USB to RS232 dongles.
Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com
Reply by larwe●September 18, 20072007-09-18
On Sep 18, 12:24 pm, Colin Paul Gloster <Colin_Paul_Glos...@ACM.org>
wrote:
> |> 3 RS232 ports?
> |Get an old PC."
> An old PC would have one RS232 port instead of three of them.
An old PC would have ISA, EISA, VLB and/or PCI slots, in addition to
USB, any of which would provide a route to add additional RS232 ports.
Additionally, any truly old PC would much more likely have two RS232
ports, not one.
Reply by Colin Paul Gloster●September 18, 20072007-09-18
On 2007-09-17, Vladimir Vassilevsky <antispam_bogus@hotmail.com>
wrote:
|-----------------------------------------------------------------------|
|"ratemonotonic wrote: |
| |
|> Hi All , |
|> |
|> Does any one know an off the shelf (and cheap) development board with|
|> 3 RS232 ports? |
| |
|Get an old PC." |
|-----------------------------------------------------------------------|
An old PC would have one RS232 port instead of three of them.
Reply by Clifford Heath●September 17, 20072007-09-17
ratemonotonic wrote:
> Does any one know an off the shelf (and cheap) development board with
> 3 RS232 ports?
I thought I saw one of the ARM boards at Olimex that has 3 RS232 ports.
Some time ago, but go check.
Reply by Thomas Magma●September 17, 20072007-09-17
"ratemonotonic" <niladri1979@gmail.com> wrote in message
news:1190056305.597740.203820@19g2000hsx.googlegroups.com...
> Hi All ,
>
> Does any one know an off the shelf (and cheap) development board with
> 3 RS232 ports?
>
> Thanks in advance for any help.
>
> Rate
>
The question doesn't make sense to me. What would the 3 RS232 ports be
connected to?
If you are referring to a low cost MCU development board that has three
bi-directional RS232 ports, and allows you to practice RS232 communications
with either C or assembly code and also has a series of output LED's for
easy debug...then the answer is 'no' I don't know of any.
Thomas