xst.xmsgs

运用FPGA控制AD9957的操作

<?xml version="1.0" encoding="UTF-8"?>
<!-- IMPORTANT: This is an internal file that has been generated
     by the Xilinx ISE software.  Any direct editing or
     changes made to this file may result in unpredictable
     behavior or data corruption.  It is strongly advised that
     users do not edit the contents of this file. -->
<messages>
<msg type="warning" file="HDLCompilers" num="261" delta="unknown" ><arg fmt="%s" index="1">&quot;ad9957_single.v&quot; line 387 </arg>Connection to output port &apos;<arg fmt="%s" index="2">dout</arg>&apos; does not match port size
</msg>

<msg type="info" file="Xst" num="1433" delta="unknown" >Contents of array &lt;<arg fmt="%s" index="1">shift_data</arg>&gt; may be accessed with an index that exceeds the array size. This could cause simulation mismatch.
</msg>

<msg type="info" file="Xst" num="1304" delta="unknown" >Contents of register &lt;<arg fmt="%s" index="1">profile</arg>&gt; in unit &lt;<arg fmt="%s" index="2">ad9957_single</arg>&gt; never changes during circuit operation. The register is replaced by logic.
</msg>

<msg type="info" file="Xst" num="1304" delta="unknown" >Contents of register &lt;<arg fmt="%s" index="1">sgl_dly_cnt</arg>&gt; in unit &lt;<arg fmt="%s" index="2">ad9957_single</arg>&gt; never changes during circuit operation. The register is replaced by logic.
</msg>

<msg type="warning" file="Xst" num="1305" delta="unknown" >Output &lt;<arg fmt="%s" index="1">io_reset</arg>&gt; is never assigned. Tied to value <arg fmt="%s" index="2">0</arg>.
</msg>

<msg type="warning" file="Xst" num="647" delta="unknown" >Input &lt;<arg fmt="%s" index="1">sdo</arg>&gt; is never used.
</msg>

<msg type="warning" file="Xst" num="646" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">sgl_dly_cnt</arg>&gt; is assigned but never used.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_ram</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_saf</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_gpio_data</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="646" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">data_out</arg>&gt; is assigned but never used.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_profile0</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_profile1</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_profile2</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_profile3</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_profile4</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_profile5</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_profile6</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_profile7</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_multichip_sync</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_ioupdate_rate</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_gpio_config</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_cfr1</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_cfr2</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_cfr3</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_ram_seg0</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_ram_seg1</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="1780" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ad9957_aux_dac</arg>&gt; is never used or assigned.
</msg>

<msg type="warning" file="Xst" num="647" delta="unknown" >Input &lt;<arg fmt="%s" index="1">ex_pm</arg>&gt; is never used.
</msg>

<msg type="warning" file="Xst" num="647" delta="unknown" >Input &lt;<arg fmt="%s" index="1">ex_bds</arg>&gt; is never used.
</msg>

<msg type="warning" file="Xst" num="647" delta="unknown" >Input &lt;<arg fmt="%s" index="1">ex_opt</arg>&gt; is never used.
</msg>

<msg type="warning" file="Xst" num="647" delta="unknown" >Input &lt;<arg fmt="%s" index="1">ex_pms</arg>&gt; is never used.
</msg>

<msg type="warning" file="Xst" num="647" delta="unknown" >Input &lt;<arg fmt="%s" index="1">tp</arg>&gt; is never used.
</msg>

<msg type="warning" file="Xst" num="647" delta="unknown" >Input &lt;<arg fmt="%s" index="1">ex_ppt</arg>&gt; is never used.
</msg>

<msg type="warning" file="Xst" num="647" delta="unknown" >Input &lt;<arg fmt="%s" index="1">ex_opt1</arg>&gt; is never used.
</msg>

<msg type="warning" file="Xst" num="647" delta="unknown" >Input &lt;<arg fmt="%s" index="1">ex_clk</arg>&gt; is never used.
</msg>

<msg type="warning" file="Xst" num="646" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">ex_opt0_sync&lt;2&gt;</arg>&gt; is assigned but never used.
</msg>

<msg type="warning" file="Xst" num="646" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">start_qudc</arg>&gt; is assigned but never used.
</msg>

<msg type="warning" file="Xst" num="646" delta="unknown" >Signal &lt;<arg fmt="%s" index="1">start_dac</arg>&gt; is assigned but never used.
</msg>

<msg type="info" file="Xst" num="1533" delta="unknown" >Unexpected state value &quot;<arg fmt="%s" index="1">100000000</arg>&quot; found while examining if signal &lt;<arg fmt="%s" index="2">state_cur</arg>&gt; describes a FSM.
</msg>

<msg type="info" file="Xst" num="2117" delta="unknown" >HDL ADVISOR - Mux Selector &lt;<arg fmt="%s" index="1">state_cur</arg>&gt; of Case statement line <arg fmt="%s" index="2">174</arg> was re-encoded using one-hot encoding. The case statement will be optimized (default statement optimization), but this optimization may lead to design initialization problems. To ensure the design works safely, you can:
	- add an &apos;<arg fmt="%s" index="3">INIT</arg>&apos; attribute on signal &lt;<arg fmt="%s" index="4">state_cur</arg>&gt; (optimization is then done without any risk)
	- use the attribute &apos;<arg fmt="%s" index="5">signal_encoding</arg> <arg fmt="%s" index="6">user</arg>&apos; to avoid onehot optimization
	- use the attribute &apos;<arg fmt="%s" index="7">safe_implementation</arg> <arg fmt="%s" index="8">yes</arg>&apos; to force XST to perform a safe (but less efficient) optimization
</msg>

<msg type="info" file="Xst" num="1767" delta="unknown" >HDL ADVISOR - Resource sharing has identified that some arithmetic operations in this design can share the same physical resources for reduced device utilization. For improved clock frequency you may try to disable resource sharing.
</msg>

<msg type="info" file="Xst" num="2387" delta="unknown" >HDL ADVISOR - A <arg fmt="%d" index="1">3</arg>-bit shift register was found for signal &lt;<arg fmt="%s" index="2">start_sync&lt;2&gt;</arg>&gt; and currently occupies <arg fmt="%d" index="3">3</arg> logic cells (<arg fmt="%d" index="4">1</arg> slices). Removing the set/reset logic would take advantage of SRL16 (and derived) primitives and reduce this to 1 logic cells (1 slices). Evaluate if the set/reset can be removed for this simple shift register. The majority of simple pipeline structures do not need to be set/reset operationally.
</msg>

<msg type="info" file="Xst" num="2387" delta="unknown" >HDL ADVISOR - A <arg fmt="%d" index="1">3</arg>-bit shift register was found for signal &lt;<arg fmt="%s" index="2">ser_start_sync&lt;2&gt;</arg>&gt; and currently occupies <arg fmt="%d" index="3">3</arg> logic cells (<arg fmt="%d" index="4">1</arg> slices). Removing the set/reset logic would take advantage of SRL16 (and derived) primitives and reduce this to 1 logic cells (1 slices). Evaluate if the set/reset can be removed for this simple shift register. The majority of simple pipeline structures do not need to be set/reset operationally.
</msg>

<msg type="warning" file="Xst" num="1710" delta="unknown" >FF/Latch  &lt;<arg fmt="%s" index="1">data_in_35</arg>&gt; (without init value) has a constant value of <arg fmt="%d" index="2">0</arg> in block &lt;<arg fmt="%s" index="3">ad9957_single</arg>&gt;.
</msg>

<msg type="warning" file="Xst" num="1895" delta="unknown" >Due to other FF/Latch trimming, FF/Latch  &lt;<arg fmt="%s" index="1">data_in_36</arg>&gt; (without init value) has a constant value of <arg fmt="%d" index="2">0</arg> in block &lt;<arg fmt="%s" index="3">ad9957_single</arg>&gt;.
</msg>

<msg type="warning" file="Xst" num="1895" delta="unknown" >Due to other FF/Latch trimming, FF/Latch  &lt;<arg fmt="%s" index="1">data_in_37</arg>&gt; (without init value) has a constant value of <arg fmt="%d" index="2">0</arg> in block &lt;<arg fmt="%s" index="3">ad9957_single</arg>&gt;.
</msg>

<msg type="warning" file="Xst" num="1895" delta="unknown" >Due to other FF/Latch trimming, FF/Latch  &lt;<arg fmt="%s" index="1">data_in_38</arg>&gt; (without init value) has a constant value of <arg fmt="%d" index="2">0</arg> in block &lt;<arg fmt="%s" index="3">ad9957_single</arg>&gt;.
</msg>

<msg type="warning" file="Xst" num="1895" delta="unknown" >Due to other FF/Latch trimming, FF/Latch  &lt;<arg fmt="%s" index="1">data_in_39</arg>&gt; (without init value) has a constant value of <arg fmt="%d" index="2">0</arg> in block &lt;<arg fmt="%s" index="3">ad9957_single</arg>&gt;.
</msg>