Hello all-
The hub below does not allow for real time performance. We experienced
very poor performance when it came to anything resembling consistent timing
of i/o. We had one set up and were sending a simple 5 character trigger
event to another computer every seven seconds and the trigger would arrive
up to 3 seconds late (worst case). We were running on NT 4.0 on a dedicated
lan (no other traffic), but the drivers may have been the problem and may
have since been fixed. 3 seconds worst case seemed extreme even for a
non-rt environment.
Troy Davis
Airborne Data Systems, Inc.
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Pasi Kaipainen
Sent: Monday, January 07, 2002 3:48 PM
To: '[EMAIL PROTECTED]'
Subject: RE: [rtl] Board with multiple serial ports
Have you considered using
http://www.comtrol.com/sales/specs/rpshsi.htm#Portable RocketPort serial
hub.
There is Linux source available. I have not used it but it may be
interesting way to add serial ports to RTL.
I wonder if somebody has done this already?
Pasi
> -----Original Message-----
> From: Michael C. Riedl [mailto:[EMAIL PROTECTED]]
> Sent: Monday, January 07, 2002 1:51 PM
> To: [EMAIL PROTECTED]
> Subject: [rtl] Board with multiple serial ports
>
>
> Hi there!
>
> At the moment I'm using two boards with four serial ports each in the
> same computer. They are ISA-Boards and allow the Interrupt
> for each port
> to jumpered individually. For up to six ports I managed to assign
> interrupts exclusively to serial ports. Then I ran out of interrupts.
> Obviously I tried the share interrupts but then receiving did not work
> anymore.
> As I used rt_com which was explicetely said to be able to handle
> interrupt sharing I wonder if the hardware might be the problem.
>
> Therefore: Could anyone recommend a board with 8 serial ports which
> allows interrupts to be shared to be run with the rt_com driver in
> rtlinux? Would you prefer a ISA or a PCI board? It must be possible to
> set baud rate, stop bits... individually for the serial ports.
>
> Thanks for your recommendations in advance...
>
> Michael C. Riedl
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