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How can i control the PCF8574 ( I2C bus) with Labview.

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How can i control the PCF8574 ( I2C bus) with Labview ( Windows)
all info is welcome.

victor.wouters@advalvas.be
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"Wouters V" wrote:
>How can i control the PCF8574 ( I2C bus) with Labview ( Windows)>all
info is welcome.>>victor.wouters@advalvas.be>>>>
There is special DLL for windows 95 to control I2C via the LPT1 port of your
PC.
You need some additional hardware (buffer) and the DLL.
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Sorry, not a solution... I'm after the same thing. Seems that a lot of people
need this, but nobody makes it - NI take note! I'll keep searching and will
post if I find anything. Would be grateful if you could do likewise.

I've got the I2C spec, and it looks as though it would be possible to bit-bash
it using a DIO card. However, I just don't have the time to do this. If
someone made a PCI card with a driver that would do nicely!

-Sean.

"Wouters V" wrote:
>How can i control the PCF8574 ( I2C bus) with Labview ( Windows)>all
info is welcome.>>victor.wouters@advalvas.be>>>>
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A reply to my own message (and for victor)

This company do it:

http://www.ultranet.com/~ias/page4.htm

If anyone finds any other solutions then please post.

"Sean Marshall" wrote:
>>Sorry, not a solution... I'm after the same thing. Seems that a lot of
people>need this, but nobody makes it - NI take note! I'll keep searching
and will>post if I find anything. Would be grateful if you could do likewise.>>I've
got the I2C spec, and it looks as though it would be possible to bit-bash>it
using a DIO card. However, I just don't have the time to do this. If>someone
made a PCI card with a driver that would do nicely!>>-Sean.>>"Wouters V"
wrote:>>How can i control the PCF8574 ( I2C
bus) wi
th Labview ( Windows)>all>info is welcome.>>victor.wouters@advalvas.be>>>>
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I'm using the LPT-port, and some hardware stuff (2 transistors as buffer).
You can implement the I²C code in LabView (byte in - byte out), but it don't
work fast.
For that reason I have written a DLL in delphi3.0 that works fine,
even on a PII-400.
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