Connecting two gpib-boards

Question

hi,
i have 2 gpib-boards on two different machines. i am trying to communicate
between the cards. unfortunately i have timing problems. the boards will
lock up after a very short time.
does anybody have programmed something like this in an ms c++ environment?
basically i just want to use the cards to send data fast between the two
pcs.
any ideas are highly appreciated.
h

Answer 1

Is there a way to do this in a clean way? e.g. that the status-bits are used
to detect the beginning and finalization of a transfer (by use of ibwait
prior to reading or writing). I found that the LACS and TASC bits are not
reset after completion of a transfer...
Mike Tranchemontagne wrote:
>This is a multi-part message in MIME format.>--------------CC52921529A8C94F0C665CB6>Content-Type:
text/plain; charset=us-ascii>Content-Transfer-Encoding: 7bit>>I did this
some years ago in QuickBASIC and later in Visual BASIC. It's not>hard and
NI even has an App Note that describes this...>>One GPIB is programmed in
the normal way.>>The other is NOT a system controller, and board level (vs.
device level) IBWRT>and IBRD calls are used. Just put the IBRD and IBWRT
in a loop, and use a>short timeout, like 100 milliseconds. Most of the time,
they will timeout,>just ignore it and keep looping. When you DONT get a
timeout, then you know>the GPIB controller (in the other machine) sent or
received something. I used>some global variable for send and receive buffers.
When IBRD eventually>didn't timeout, then I knew my RD$ buffer had a new
message from the>controller. When I wanted to send something, I used SND$
and when IBWRT>eventually didn't timeout, then I knew the controller had
received my message.>>Good luck!>>henning hummert wrote>> hi,>> i have
2 gpib-boards on two different machines. i am trying to communicate>> between
the cards. unfortunately i have timing problems. the boards will>> lock up
after a very short time.>> does anybody have programmed something like this
in an ms c++ environment?>> basically i just want to use the cards to send
data fast between the two>> pcs.>>>> any ideas are highly appreciated.>>>>
h>>-->Best Regards,>Mike T>>Mike Tranchemontagne>Consulting Applications
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