51 lines
1.9 KiB
ReStructuredText
51 lines
1.9 KiB
ReStructuredText
.. _file_formats_unique_blocks:
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Unique Blocks (.xml)
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--------------------
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A unique blocks file is formatted in XML. The unique blocks can be of type ``cbx``, ``cby``, or ``sb``. As illustrated by the XML code below, the file includes the type and coordinates of these unique blocks, as well as the coordinates of their corresponding instances.
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Configurable Block
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~~~~~~~~~~~~~~~~~~
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Unique blocks can be applied to various blocks, each of which can be of type ``cbx``, ``cby``, or ``sb``, and may have different coordinates.
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.. note::
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For each block, a set of keys can be defined. For unique blocks, both keys and instances can be specified. However, if a unique block does not have an instance, only keys are permitted.
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- ``type`` specifies the type of the unique block in the FPGA fabric. Valid values for ``type`` are ``cbx``, ``cby``, or ``sb``.
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- ``x`` represents the x-coordinate of the unique block.
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- ``y`` represents the y-coordinate of the unique block.
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Configurable Instance
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~~~~~~~~~~~~~~~~~~~~~
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A specific unique block can have multiple instances, where each instance is a mirrored version of the unique block. Each instance shares the same type as its parent block and includes information about its coordinates.
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.. note::
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- ``x`` specifies the x-coordinate of the instance.
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- ``y`` specifies the y-coordinate of the instance.
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The following content provides an example of a unique block file:
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.. code-block:: xml
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<unique_blocks>
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<block type="sb" x="0" y="0"/>
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<block type="sb" x="0" y="1"/>
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<block type="sb" x="1" y="0"/>
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<block type="sb" x="1" y="1"/>
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<block type="cbx" x="1" y="0">
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<instance x="0" y="0"/>
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<instance x="0" y="1"/>
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</block>
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<block type="cbx" x="1" y="1"/>
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<block type="cby" x="0" y="1">
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<instance x="0" y="0"/>
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<instance x="1" y="0"/>
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</block>
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<block type="cby" x="1" y="1"/>
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</unique_blocks>
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