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[Doc] Updated documentation about new syntax in fabric key

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tangxifan 2021-09-21 17:01:52 -07:00
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docs/source/manual/file_formats/fabric_key.rst
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@ -62,6 +62,14 @@ Each configurable block is defined as a key. There are two ways to define a key,
- ``alias`` indicates the instance name of the configurable memory block in the top-level FPGA fabric. If a valid alias is specified, the ``name`` and ``value`` are not required.
- ``column`` indicates the relative x coordinate for a configurable memory in a configurable region at the top-level FPGA fabric. This is required when the memory bank protocol is selection.
.. note:: The configurable memory blocks in the same column will share the same Bit Line (BL) bus
- ``row`` indicates the relative y coordinate for a configurable memory in a configurable region at the top-level FPGA fabric. This is required when the memory bank protocol is selection.
.. note:: The configurable memory blocks in the same row will share the same Word Line (WL) bus
.. warning:: For fast loading of fabric key, strongly recommend to use pairs ``name`` and ``alias`` or ``name`` and ``value`` in the fabric key file. Using only ``alias`` may cause long parsing time for fabric key.
The following is an example of a fabric key generate by OpenFPGA for a 2 :math:`\times` 2 FPGA.
@ -149,3 +157,46 @@ This key contains only ``name`` and ``value`` which is fast to parse.
<key id="32" name="grid_io_left" value="1"/>
</region>
</fabric_key>
The following shows another example of a fabric key generate by OpenFPGA for a 2 :math:`\times` 2 FPGA using memory bank.
This key contains only ``name``, ``value``, ``row`` and ``column``.
.. code-block:: xml
<fabric_key>
<region id="0">
<key id="0" name="sb_2__2_" value="0" alias="sb_2__2_" column="5" row="5"/>
<key id="1" name="grid_clb" value="3" alias="grid_clb_2__2_" column="4" row="4"/>
<key id="2" name="sb_0__1_" value="0" alias="sb_0__1_" column="1" row="3"/>
<key id="3" name="cby_0__1_" value="0" alias="cby_0__1_" column="1" row="2"/>
<key id="4" name="grid_clb" value="2" alias="grid_clb_2__1_" column="4" row="2"/>
<key id="5" name="grid_io_left" value="0" alias="grid_io_left_0__1_" column="0" row="2"/>
<key id="6" name="sb_1__0_" value="0" alias="sb_1__0_" column="3" row="1"/>
<key id="7" name="sb_1__1_" value="0" alias="sb_1__1_" column="3" row="3"/>
<key id="8" name="cbx_1__1_" value="1" alias="cbx_2__1_" column="4" row="3"/>
<key id="9" name="cby_1__1_" value="1" alias="cby_1__2_" column="3" row="4"/>
<key id="10" name="grid_io_right" value="0" alias="grid_io_right_3__2_" column="6" row="4"/>
<key id="11" name="cbx_1__0_" value="1" alias="cbx_2__0_" column="4" row="1"/>
<key id="12" name="cby_1__1_" value="0" alias="cby_1__1_" column="3" row="2"/>
<key id="13" name="grid_io_right" value="1" alias="grid_io_right_3__1_" column="6" row="2"/>
<key id="14" name="grid_io_bottom" value="1" alias="grid_io_bottom_1__0_" column="2" row="0"/>
<key id="15" name="cby_2__1_" value="0" alias="cby_2__1_" column="5" row="2"/>
<key id="16" name="sb_2__1_" value="0" alias="sb_2__1_" column="5" row="3"/>
<key id="17" name="cbx_1__0_" value="0" alias="cbx_1__0_" column="2" row="1"/>
<key id="18" name="grid_clb" value="1" alias="grid_clb_1__2_" column="2" row="4"/>
<key id="19" name="cbx_1__2_" value="0" alias="cbx_1__2_" column="2" row="5"/>
<key id="20" name="cbx_1__2_" value="1" alias="cbx_2__2_" column="4" row="5"/>
<key id="21" name="sb_2__0_" value="0" alias="sb_2__0_" column="5" row="1"/>
<key id="22" name="sb_1__2_" value="0" alias="sb_1__2_" column="3" row="5"/>
<key id="23" name="cby_0__1_" value="1" alias="cby_0__2_" column="1" row="4"/>
<key id="24" name="sb_0__0_" value="0" alias="sb_0__0_" column="1" row="1"/>
<key id="25" name="grid_clb" value="0" alias="grid_clb_1__1_" column="2" row="2"/>
<key id="26" name="cby_2__1_" value="1" alias="cby_2__2_" column="5" row="4"/>
<key id="27" name="grid_io_top" value="1" alias="grid_io_top_2__3_" column="4" row="6"/>
<key id="28" name="sb_0__2_" value="0" alias="sb_0__2_" column="1" row="5"/>
<key id="29" name="grid_io_bottom" value="0" alias="grid_io_bottom_2__0_" column="4" row="0"/>
<key id="30" name="cbx_1__1_" value="0" alias="cbx_1__1_" column="2" row="3"/>
<key id="31" name="grid_io_top" value="0" alias="grid_io_top_1__3_" column="2" row="6"/>
<key id="32" name="grid_io_left" value="1" alias="grid_io_left_0__2_" column="0" row="4"/>
</region>
</fabric_key>