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<H1><A NAME="SECTION00610000000000000000">
Problem Description</A>
</H1>
<P>
During the course of debugging the hardware interface between the
computer itself and the outside world, it is sometimes necessary to
test this actuation hardware by testing them with applied known
voltages. Furthermore, it is also sometimes necessary to actively
monitor voltage reading from the real world sensing mechanisms, again
for the purpose of debugging said hardware.
<P>
Our example program attempts to facilitate this real time monitoring
of sensor voltages and real time application of test voltages. It does
so by presenting a window to the user with five independent ``spin
buttons'' (Figure <A HREF="node57.html#IO_tester">6.2</A>), each of which controls each of the
D/A channels, and allowing the user to record both the A/D inputs and
the signals latched on to the D/A outputs.
<P>
<P></P>
<DIV ALIGN="CENTER"><A NAME="sample_script"></A><A NAME="3250"></A>
<TABLE>
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 6.1:</STRONG>
Example <TT>user_GUI.par</TT> for the I/O Tester</CAPTION>
<TR><TD><IMG
WIDTH="481" HEIGHT="267" BORDER="0"
SRC="img69.png"
ALT="\begin{figure}\centering\begin{tt}
\begin{verbatim}start_col n ..."></TD></TR>
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<P>
<P></P>
<DIV ALIGN="CENTER"><A NAME="IO_tester"></A><A NAME="3251"></A>
<TABLE>
<CAPTION ALIGN="BOTTOM"><STRONG>Figure 6.2:</STRONG>
Controller window for example I/O Tester
application.</CAPTION>
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<ADDRESS>
Michael Barabanov
2001-06-19
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