Hi Stephen,
There is definitely a difference in performance. If you need to
read from the Service USB device every few milliseconds
--something between 50 and 100 millisecs-- to get accurate
results, you just can't do that with a simple do as AppleScript
command, but you can with a good external.
Every time you use AppleScript in Revolution, it compiles the
script. This slows down performance extremely compared to e.g.
HyperCard and SuperCard. To work around this problem, the larger
part of your code will have to consist of AppleScript. For
example you can create an applet that keep running and interacts
with Rev.
It would be very interesting if B&K oHG included an external for
Rev with their device, as they used to do for HyperCard. They
would also have a significant competitive advantage, if they did.
Best,
Mark
Stephen Barncard wrote:
Continuing the thread about machine control...
I read the specs from
http://www.bkohg.de/service_e.html
and wrote requesting info about more directly connecting Rev.
Marco Bönig wrote back and suggested using their Applescript interface.
Would there be an advantage in having an XCMD do this instead of
Applescript? Would there be some latency in using Applescript instead of
directly?
I don't need this now, but I figure sometime in the future I will. I
often end up in strange hardware-software lashups.
stephen barncard
From: Marco Bönig <[EMAIL PROTECTED]>
Subject: Revolution and SERVICE USB
Date: Mon, 7 Nov 2005 10:52:35 +0100
To: [EMAIL PROTECTED]
Dear Mr. Barncard,
it's funny. We got a lot of requests about Revolution and we think, we
had forgotten to support Revolution. Sorry for that.
However, we tested our Interface on MacOSX with Revolution and it
works. Revolution can control AppleScript and AppleScript can control
SERVICE USB plus. For example, to set the output value to 85 (=
01010101 binary) the syntax is:
do "set SERVICE output value 85" as applescript
We have no sample stack yet, but we will create a sample stack,
starting in a few days.
SERVICE USB is a Mac-only product. Maybe it is a good idea to work
with Revolution and SERVICE USB on a PC. But we have no resources to
handle support for an additional platform, like PC and Windows. Thus
we have no plans to create a PC-Version.
If you are a hardcore system-programmer, we can explain the SERVICE
USB low level protocol to you and try to help creating a PC Version.
best regards
Marco Boenig
________________________________________________
Marco Bönig mailto:[EMAIL PROTECTED]
Bönig und Kallenbach oHG Tel. 0231/753650
Lindemannstr. 25 Fax: 0231/753659
D-44137 Dortmund http://bkohg.com
Am 04.11.2005 um 21:18 schrieb [EMAIL PROTECTED]:
I think you have a great product, with many uses. I use a software
platform called Runtime Revolution
http://www.runrev.com/
- it's an evolution of an earlier product called Metacard. It's a RAD
that is the clear and superior succesor to Hypercard.
Since it appears that you have created middleware for almost every
other development platform, I wonder if you would consider helping us
Rev users get connected to your interfaces. You'll find a lot of
folks that will help you do it on our rather friendly email list.
Right now I'd be happy with a Mac XCMD that would work with Rev, but
I'm sure the others would love a PC version at some point.
OR perhaps you have a SDK that might point the way.
--
eHUG coordinator
mailto:[EMAIL PROTECTED]
http://www.ehug.info
http://home.wanadoo.nl/mark.sch
http://www.economy-x-talk.com
Please inform me about vacancies in the field of
general economics at your institute. I am also looking
for new freelance programming projects.
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