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Node: <a name="Element%20File">Element File</a>,
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Next: <a rel="next" accesskey="n" href="Font-File.html#Font%20File">Font File</a>,
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Previous: <a rel="previous" accesskey="p" href="Layout-File.html#Layout%20File">Layout File</a>,
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Up: <a rel="up" accesskey="u" href="File-Formats.html#File%20Formats">File Formats</a>
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<h3 class="section">Element File Format</h3>
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<p>Element files are used to describe one component which then may be used
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several times within one or more layouts. You will normally split the
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file into two parts, one for the pinout and one for the package description.
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Using <code>m4</code> allows you to define pin names as macros in one file and
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include a package description file which evaluates the macros. See
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the resource <em>elementCommand</em> for more information. The pins (and pads)
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must appear in sequential order in the element file (new in 1.5) so that
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pin 1 must be the first PIN(...) in the file.
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<p>Doing things this way makes it possible to use one package file for several
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different circuits. See the sample files <code>dil*</code>.
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<p>The lowest x and y coordinates of all sub-objects of an element are used
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as an attachment point for the cross hair cursor of the main window.
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<pre class="example"> File = {Element}...
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Element = "Element(" Flags Description LayoutName Value \
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TextX TextY direction scale TextFlags")"
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"(" {ElementData}... [Mark] ")"
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ElementData = {ElementLine | Pad | Pin | ElementArc }...
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ElementArc = "ElementArc(" X Y Width Height
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StartAngle DeltaAngle Thickness ")"
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ElementLine = "ElementLine(" X1 Y1 X2 Y2 Thickness ")"
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Mark = "Mark(" X Y ")"
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Pad = "Pad(" X1 Y1 X2 Y2 Thickness Name PinNumber Flags ")"
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Pin = "Pin(" X Y Thickness DrillingHole Name PinNumber Flags ")"
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<br><dt><code>Element</code>
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<dd>Objects of type element are determined by flags, some names, a canonical
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and a layout name as well as a value. Additional fields are text position,
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their direction counted from zero to three (n * 90 degrees counter-clockwise)
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<br><dt><code>Flags</code>
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<dd>The flag field determines the state of an element.
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<pre class="display"> bit 4: the element name is hidden
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bit 6: element has been selected
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bit 7: element is located on the solder side
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<br><dt><code>TextFlags</code>
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<dd><dt><code>scale</code>
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<dd><dt><code>direction</code>
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<dd>See the description of text object earlier in this chapter.
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<br><dt><code>ElementLine</code>
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<dd>A line is defined by its start and end points and by its size, or width.
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<br><dt><code>ElementArc</code>
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<dd>Defines an arc by its center, width, height, start angle, its length in
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degrees and its size. Remember the y axis on the screen grows downwards.
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<br><dt><code>Mark</code>
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<dd>is just a hint to make positioning easier. The cross hair will be positioned
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here. Its center is passed as the two arguments.
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<br><dt><code>Pad</code>
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<dd>A pad is very similar to a line except it may not be disconnected from
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its element and it has an associated name.
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Is is defined by two end point position, size, name and by some flags.
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<pre class="example"> bit 2: set if pad was found during a connection search
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bit 5: display the pads name
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bit 6: pad has been selected
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bit 7: pad is located on the solder side
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<br><dt><code>Pin</code>
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<dd>A pin is very similar to a via except it may not be disconnected from
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<pre class="example"> bit 0: always set
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bit 2: set if pin was found during a connection search
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bit 3: set if pin is only a mounting hole (no copper annulus)
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bit 5: display the pins name
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bit 6: pin has been selected
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bit 8: pin is drawn as a square
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bit 12: set if pin is drawn with an octagonal shape
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doc/pcb.html/Element-File.html
