Re: EMC compatable computers

["alex" <telecomt-at-tht.net>]

Currently I'm trying to mate Dos DRO with other applications over
Ethernet.Ping
time between two Dos machines - 0.00 ms.
Alex

----- Original Message -----
From: Matt Shaver <mshaver-at-erols.com>
To: Multiple recipients of list <emc-at-nist.gov>
Sent: Saturday, January 11, 2003 12:14 AM
Subject: Re: EMC compatable computers


>
> On Friday 10 January 2003 12:20 pm, Phil Wilshire wrote:
> > HI All
> >
> > I would think that Firewire would make a better option for a bus driver
> > servo board.
> > Any comments ???
> > If you want a USB solution the 5272 Coldfire embedded system should work
> > here.
> > Again any comments ??
>
> I don't know enough to comment whether 1394 has latency or frame rate
> problems like USB, but there are even bigger non-technical stumbling
blocks:
>
> 1. The development kits I've seen cost $1500-$2000. See:
> http://www.emjembedded.com/cgi-bin/america/setframe.cgi?spec+MDR
>
> 2. Firewire development is effectively a closed process controlled by the
> 1394 Trade Association. Realistic participation requires becoming a
member.
> Membership fees start at (you can see this coming, can't you...) $4000...
> every year!
>
> The PPMC should be viable for a long time in desktop PCs with PCI parallel
> port add-in cards. If you want to develop a high speed serial controller,
I
> think the best option is Ethernet. I don't mean a complete TCP/IP network
> device, more like a dedicated 100BaseT NIC connected to an embedded
ethernet
> equipped servo controller through a crossover cable. The communications
> protocol would be raw frames (there's integrated hardware CRC checking for
> each frame). Inexpensive prototyping materials are widely available. As an
> example:
>
> http://www.edtp.com/
>
> Comments? Phil? Anybody? Don't all speak at once... ;) ,
> Matt