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zimoch
2011-09-19 09:30:00 +00:00
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34
doc/tipsandtricks.html
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@ -3,12 +3,13 @@
<html>
<head>
<title>StreamDevice: Tips and Tricks</title>
<link rel="shortcut icon" href="sls_icon.ico">
<link rel="shortcut icon" href="favicon.ico">
<link rel="stylesheet" type="text/css" href="stream.css">
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<meta name="author" content="Dirk Zimoch">
</head>
<body>
<iframe src="nav.html" id="navleft"></iframe>
<h1>StreamDevice: Tips and Tricks</h1>
<a name="argvar"></a>
@ -54,7 +55,7 @@ read {in "new value = %f";}
<code>
record (ai, "$(RECORD)") {<br>
&nbsp;&nbsp;field (DTYP, "stream")<br>
&nbsp;&nbsp;field (INP, "@(DEVICETYPE).proto read $(BUS)")<br>
&nbsp;&nbsp;field (INP, "@$(DEVICETYPE).proto read $(BUS)")<br>
&nbsp;&nbsp;field (SCAN, "I/O Intr")<br>
}
</code>
@ -95,10 +96,10 @@ array_out {separator=", "; out "an array: (%.2f)";}
The format <code>%.2f</code> is repeated for each element of the array.
All elements are separated by <code>", "</code>.<br>
Output will look like this:
</p>
<pre>
an array: (3.14, 17.30, -12.34)
</pre>
</p>
<h3>B) We have up to 12 numeric values</h3>
<p>
Use a <a href="calcout.html">calcout</a> record and
@ -121,7 +122,7 @@ record (calcout, "$(RECORD)") {<br>
&nbsp;&nbsp;field (INPC, "$(C_RECORD)")<br>
&nbsp;&nbsp;field (CALC, "0")<br>
&nbsp;&nbsp;field (DTYP, "stream")<br>
&nbsp;&nbsp;field (OUT, "@(DEVICETYPE).proto write_ABC $(BUS)")<br>
&nbsp;&nbsp;field (OUT, "@$(DEVICETYPE).proto write_ABC $(BUS)")<br>
}
</code>
</p>
@ -131,14 +132,14 @@ Use <a href="formats.html#types">record references</a> in the format.
</p>
<p>
<code>
acquire {out 'ACQUIRE "%(\$1:directory.VAL)s/%s",%(\$1:time.VAL).3f;';}
acquire {out 'ACQUIRE "%(\$1:directory)s/%s",%(\$1:time).3f;';}
</code>
</p>
<p>
You must specify the full <code>record.FIELD</code> name,
even for <code>VAL</code> fields.
To avoid record names in protocol files use
<a href="protocol.html#argvar">protocol arguments</a>.
You can specify a record name or record.FIELD in parentheses directly
after the <code>%</code>.
To avoid plain record names in protocol files use
<a href="protocol.html#argvar">protocol arguments</a> like <code>\$1</code>.
In the link, specify the record name or just the basename of the
other records (device name) in parentheses.
</p>
@ -146,7 +147,7 @@ other records (device name) in parentheses.
<code>
record (stringout, "$(DEVICE):getimage") {<br>
&nbsp;&nbsp;field (DTYP, "stream")<br>
&nbsp;&nbsp;field (OUT, "@(DEVICETYPE).proto acquire($(DEVICE)) $(BUS)")<br>
&nbsp;&nbsp;field (OUT, "@$(DEVICETYPE).proto acquire($(DEVICE)) $(BUS)")<br>
}
</code>
</p>
@ -190,12 +191,12 @@ read_B {in "A=%*f, B=%f";}
<code>
record (ai, "$(DEVICE):A") {<br>
&nbsp;&nbsp;field (DTYP, "stream")<br>
&nbsp;&nbsp;field (INP, "@(DEVICETYPE).proto read_A $(BUS)")<br>
&nbsp;&nbsp;field (INP, "@$(DEVICETYPE).proto read_A $(BUS)")<br>
&nbsp;&nbsp;field (SCAN, "1 second")<br>
}<br>
record (ai, "$(DEVICE):B") {<br>
&nbsp;&nbsp;field (DTYP, "stream")<br>
&nbsp;&nbsp;field (INP, "@(DEVICETYPE).proto read_B $(BUS)")<br>
&nbsp;&nbsp;field (INP, "@$(DEVICETYPE).proto read_B $(BUS)")<br>
&nbsp;&nbsp;field (SCAN, "I/O Intr")<br>
}
</code>
@ -221,14 +222,14 @@ To avoid record names in protocol files, use
</p>
<p>
<code>
read_AB {out "GET A,B"; in "A=%f, B=%(\$1.VAL)f";}
read_AB {out "GET A,B"; in "A=%f, B=%(\$1)f";}
</code>
</p>
<p>
<code>
record (ai, "$(DEVICE):A") {<br>
&nbsp;&nbsp;field (DTYP, "stream")<br>
&nbsp;&nbsp;field (INP, "@(DEVICETYPE).proto read_AB($(DEVICE):B) $(BUS)")<br>
&nbsp;&nbsp;field (INP, "@$(DEVICETYPE).proto read_AB($(DEVICE):B) $(BUS)")<br>
&nbsp;&nbsp;field (SCAN, "1 second")<br>
}<br>
record (ai, "$(DEVICE):B") {<br>
@ -259,14 +260,14 @@ When asked "<code>CURRENT?</code>", the device send something like
</p>
<p>
<code>
read_current {out "CURRENT?"; in "CURRENT %f A"; @mismatch {in "%(\1.VAL)39c";}}
read_current {out "CURRENT?"; in "CURRENT %f A"; @mismatch {in "%(\1)39c";}}
</code>
</p>
<p>
<code>
record (ai, "$(DEVICE):readcurrent") {<br>
&nbsp;&nbsp;field (DTYP, "stream")<br>
&nbsp;&nbsp;field (INP, "@(DEVICETYPE).proto read_current($(DEVICE):message) $(BUS)")<br>
&nbsp;&nbsp;field (INP, "@$(DEVICETYPE).proto read_current($(DEVICE):message) $(BUS)")<br>
}<br>
record (stringin, "$(DEVICE):message") {<br>
}
@ -292,6 +293,5 @@ record (stringout, "$(DEVICE):clean_2") {<br>
</code>
<hr>
<p><small>Dirk Zimoch, 2007</small></p>
<script src="stream.js" type="text/javascript"></script>
</body>
</html>