xst.xmsgs

经典的dds发生器ad9851vhdl的并行通信代码

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<messages>
<msg type="warning" file="Xst" num="819" delta="unknown" >&quot;<arg fmt="%s" index="1">E:/C-VHDL/vhdl/ad9851-1/ad9851.vhd</arg>&quot; line <arg fmt="%d" index="2">58</arg>: The following signals are missing in the process sensitivity list:
<arg fmt="%s" index="3">keyf</arg>.
</msg>

<msg type="warning" file="Xst" num="653" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">control&lt;0&gt;</arg>&gt; is used but never assigned. Tied to value <arg fmt="%s" index="2">00001001</arg>.
</msg>

<msg type="info" file="Xst" num="1435" delta="unknown" >HDL ADVISOR - Unable to extract a block RAM for signal &lt;<arg fmt="%s" index="1">control</arg>&gt;. The read/write synchronization appears to be READ_FIRST and is not available for the selected family. A distributed RAM will usually be created instead. To take advantage of block RAM resources, you may want to revisit your RAM synchronization or check available device families.
</msg>

<msg type="warning" file="Xst" num="1988" delta="unknown" >Unit &lt;<arg fmt="%s" index="1">ad9851</arg>&gt;: instances &lt;<arg fmt="%s" index="2">Mcompar__n0009</arg>&gt;, &lt;<arg fmt="%s" index="3">Mcompar__n0031</arg>&gt; of unit &lt;<arg fmt="%s" index="4">LPM_COMPARE_2</arg>&gt; and unit &lt;<arg fmt="%s" index="5">LPM_COMPARE_5</arg>&gt; are dual, second instance is removed
</msg>

<msg type="warning" file="Xst" num="1293" delta="unknown" >FF/Latch  &lt;<arg fmt="%s" index="1">control_1_0</arg>&gt; has a constant value of <arg fmt="%d" index="2">0</arg> in block &lt;<arg fmt="%s" index="3">ad9851</arg>&gt;.
</msg>

<msg type="warning" file="Xst" num="1293" delta="unknown" >FF/Latch  &lt;<arg fmt="%s" index="1">control_1_4</arg>&gt; has a constant value of <arg fmt="%d" index="2">0</arg> in block &lt;<arg fmt="%s" index="3">ad9851</arg>&gt;.
</msg>

<msg type="warning" file="Xst" num="1293" delta="unknown" >FF/Latch  &lt;<arg fmt="%s" index="1">control_1_5</arg>&gt; has a constant value of <arg fmt="%d" index="2">0</arg> in block &lt;<arg fmt="%s" index="3">ad9851</arg>&gt;.
</msg>

<msg type="warning" file="Xst" num="1293" delta="unknown" >FF/Latch  &lt;<arg fmt="%s" index="1">control_1_6</arg>&gt; has a constant value of <arg fmt="%d" index="2">0</arg> in block &lt;<arg fmt="%s" index="3">ad9851</arg>&gt;.
</msg>

<msg type="warning" file="Xst" num="1293" delta="unknown" >FF/Latch  &lt;<arg fmt="%s" index="1">control_1_7</arg>&gt; has a constant value of <arg fmt="%d" index="2">0</arg> in block &lt;<arg fmt="%s" index="3">ad9851</arg>&gt;.
</msg>

<msg type="warning" file="Xst" num="1293" delta="unknown" >FF/Latch  &lt;<arg fmt="%s" index="1">control_2_6</arg>&gt; has a constant value of <arg fmt="%d" index="2">0</arg> in block &lt;<arg fmt="%s" index="3">ad9851</arg>&gt;.
</msg>

<msg type="warning" file="Xst" num="1293" delta="unknown" >FF/Latch  &lt;<arg fmt="%s" index="1">control_2_7</arg>&gt; has a constant value of <arg fmt="%d" index="2">0</arg> in block &lt;<arg fmt="%s" index="3">ad9851</arg>&gt;.
</msg>

<msg type="warning" file="Xst" num="1293" delta="unknown" >FF/Latch  &lt;<arg fmt="%s" index="1">control_4_0</arg>&gt; has a constant value of <arg fmt="%d" index="2">0</arg> in block &lt;<arg fmt="%s" index="3">ad9851</arg>&gt;.
</msg>

<msg type="info" file="Xst" num="2261" delta="unknown" >The FF/Latch &lt;<arg fmt="%s" index="1">control_1_1</arg>&gt; in Unit &lt;<arg fmt="%s" index="2">ad9851</arg>&gt; is equivalent to the following <arg fmt="%s" index="3">2 FFs/Latches</arg>, which will be removed : <arg fmt="%s" index="4">&lt;control_1_2&gt; &lt;control_1_3&gt; </arg>
</msg>

</messages>