How to avoid dependance between output digital port with a PCI 1200 daq card?

Hello,
I don't manage to fix the state of a line on one port (PA0 for ex) without change the state of another line of another digital port (PB0 for ex)
I use a PCI 1200 Daq card with Labview 5.0.1 (under Windows 98)
How to configure a robust state (high logic level) on a line of a port??
Does anybody have an idea on this problem?
Thanks a lot in advance and happy new year to the community
JF LAVEZARD

jflab a écrit:
Hello,
I don't manage to fix the state of a line on one port (PA0 for ex) without change the state of another line of another digital port (PB0 for ex)
I use a PCI 1200 Daq card with Labview 5.0.1 (under Windows 98)
How to configure a robust state (high logic level) on a line of a port??
Does anybody have an idea on this problem?
Thanks a lot in advance and happy new year to the community
JF LAVEZARD
Hello,
I've found the problem
The PCI1200 has a chip 8255 for Digital I/O
If I use the bad VI, it reconfigures the port and all the lines go in a low logic state
so I'd to write only on the port or the line without reconfigure the port
So the good VI in the palett is: Port Write and not Digital Port write!
See attached file..
Thanks
Best Regards
Attachments:
port_dio.jpg ‏771 KB

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How to avoid dependance between output digital port with a PCI 1200 daq card?

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