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<h1>drv_eth_vga_capture.v</h1> </div>
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<a href="drv__eth__vga__capture_8v.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="keyword">/*</span>
<a name="l00002"></a>00002 <span class="keyword"> Copyright 2010, Aleksander Osman, alfik@poczta.fm. All rights reserved.</span>
<a name="l00003"></a>00003 <span class="keyword"> </span>
<a name="l00004"></a>00004 <span class="keyword"> Redistribution and use in source and binary forms, with or without modification, are</span>
<a name="l00005"></a>00005 <span class="keyword"> permitted provided that the following conditions are met:</span>
<a name="l00006"></a>00006 <span class="keyword"> </span>
<a name="l00007"></a>00007 <span class="keyword"> 1. Redistributions of source code must retain the above copyright notice, this list of</span>
<a name="l00008"></a>00008 <span class="keyword"> conditions and the following disclaimer.</span>
<a name="l00009"></a>00009 <span class="keyword"> </span>
<a name="l00010"></a>00010 <span class="keyword"> 2. Redistributions in binary form must reproduce the above copyright notice, this list</span>
<a name="l00011"></a>00011 <span class="keyword"> of conditions and the following disclaimer in the documentation and/or other materials</span>
<a name="l00012"></a>00012 <span class="keyword"> provided with the distribution.</span>
<a name="l00013"></a>00013 <span class="keyword"> </span>
<a name="l00014"></a>00014 <span class="keyword"> THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED</span>
<a name="l00015"></a>00015 <span class="keyword"> WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND</span>
<a name="l00016"></a>00016 <span class="keyword"> FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR</span>
<a name="l00017"></a>00017 <span class="keyword"> CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR</span>
<a name="l00018"></a>00018 <span class="keyword"> CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR</span>
<a name="l00019"></a>00019 <span class="keyword"> SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON</span>
<a name="l00020"></a>00020 <span class="keyword"> ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING</span>
<a name="l00021"></a>00021 <span class="keyword"> NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF</span>
<a name="l00022"></a>00022 <span class="keyword"> ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00023"></a>00023 <span class="keyword"> */</span>
<a name="l00024"></a>00024
<a name="l00025"></a>00025 <span class="keyword">/*! \file</span>
<a name="l00026"></a>00026 <span class="keyword"> \brief DM9000A 10/100 Mbit Ethernet driver for a VGA frame grabber </span>
<a name="l00027"></a>00027 <span class="keyword"> */</span>
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="keyword">/*! \brief \copybrief drv_eth_vga_capture.v</span>
<a name="l00030"></a>00030 <span class="keyword">*/</span>
<a name="l00031"></a><a class="code" href="classdrv__eth__vga__capture.html">00031</a> <span class="vhdlkeyword">module</span> <a class="code" href="classdrv__eth__vga__capture.html">drv_eth_vga_capture</a>(
<a name="l00032"></a>00032 <span class="keyword">//% \name Clock and reset
</span>
<a name="l00033"></a>00033 <span class="keyword">//% @{</span>
<a name="l00034"></a><a class="code" href="classdrv__eth__vga__capture.html#a26c09de4c12b15a080f22caec2384eee">00034</a> <span class="vhdlkeyword">input</span> <a class="code" href="classdrv__eth__vga__capture.html#a26c09de4c12b15a080f22caec2384eee">clk_30</a>,
<a name="l00035"></a><a class="code" href="classdrv__eth__vga__capture.html#a4be6e1a59f945fb87af42e8d7336216a">00035</a> <span class="vhdlkeyword">input</span> <a class="code" href="classdrv__eth__vga__capture.html#a4be6e1a59f945fb87af42e8d7336216a">clk_25</a>,
<a name="l00036"></a><a class="code" href="classdrv__eth__vga__capture.html#a7b4e1c4a172b419f95f9874295abca61">00036</a> <span class="vhdlkeyword">input</span> <a class="code" href="classdrv__eth__vga__capture.html#a7b4e1c4a172b419f95f9874295abca61">reset_n</a>,
<a name="l00037"></a>00037 <span class="keyword">//% @}</span>
<a name="l00038"></a>00038
<a name="l00039"></a>00039 <span class="keyword">//% \name Captured VGA output signals
</span>
<a name="l00040"></a>00040 <span class="keyword">//% @{</span>
<a name="l00041"></a><a class="code" href="classdrv__eth__vga__capture.html#a8acf659337bff5e5bf6b7ab95da464a4">00041</a> <span class="vhdlkeyword">input</span> <a class="code" href="classdrv__eth__vga__capture.html#a8acf659337bff5e5bf6b7ab95da464a4">display_valid</a>,
<a name="l00042"></a><a class="code" href="classdrv__eth__vga__capture.html#a1b7bef5ae7965541b6829e0582237a53">00042</a> <span class="vhdlkeyword">input</span> [<span class="vhdllogic">9</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__eth__vga__capture.html#a1b7bef5ae7965541b6829e0582237a53">vga_r</a>,
<a name="l00043"></a><a class="code" href="classdrv__eth__vga__capture.html#a3002998608bbca4b043ef32814a0e90c">00043</a> <span class="vhdlkeyword">input</span> [<span class="vhdllogic">9</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__eth__vga__capture.html#a3002998608bbca4b043ef32814a0e90c">vga_g</a>,
<a name="l00044"></a><a class="code" href="classdrv__eth__vga__capture.html#a5c46fd036c0ceb4ca62ee992f3a3f8cd">00044</a> <span class="vhdlkeyword">input</span> [<span class="vhdllogic">9</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__eth__vga__capture.html#a5c46fd036c0ceb4ca62ee992f3a3f8cd">vga_b</a>,
<a name="l00045"></a>00045 <span class="keyword">//% @}</span>
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="keyword">//% \name DM9000A Ethernet hardware interface
</span>
<a name="l00048"></a>00048 <span class="keyword">//% @{</span>
<a name="l00049"></a><a class="code" href="classdrv__eth__vga__capture.html#a84472d11a61abbc3b23a0e969dbf7034">00049</a> <span class="vhdlkeyword">output</span> <a class="code" href="classdrv__eth__vga__capture.html#a84472d11a61abbc3b23a0e969dbf7034">enet_clk_25</a>,
<a name="l00050"></a><a class="code" href="classdrv__eth__vga__capture.html#ad0ebcebdfa40bfad1f0e1cf767c5f948">00050</a> <span class="vhdlkeyword">output</span> <a class="code" href="classdrv__eth__vga__capture.html#ad0ebcebdfa40bfad1f0e1cf767c5f948">enet_reset_n</a>,
<a name="l00051"></a><a class="code" href="classdrv__eth__vga__capture.html#acafc6c0c8dba9dc4e5b35d68f9ec30f7">00051</a> <span class="vhdlkeyword">output</span> <a class="code" href="classdrv__eth__vga__capture.html#acafc6c0c8dba9dc4e5b35d68f9ec30f7">enet_cs_n</a>,
<a name="l00052"></a><a class="code" href="classdrv__eth__vga__capture.html#a21b872000f4cc3cc38086275e5031edb">00052</a> <span class="vhdlkeyword">input</span> <a class="code" href="classdrv__eth__vga__capture.html#a21b872000f4cc3cc38086275e5031edb">enet_irq</a>,
<a name="l00053"></a>00053
<a name="l00054"></a><a class="code" href="classdrv__eth__vga__capture.html#acc5370f78bef4d859ab318c252e0d4d3">00054</a> <span class="vhdlkeyword">output</span> <span class="vhdlkeyword">reg</span> <a class="code" href="classdrv__eth__vga__capture.html#acc5370f78bef4d859ab318c252e0d4d3">enet_ior_n</a>,
<a name="l00055"></a><a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">00055</a> <span class="vhdlkeyword">output</span> <span class="vhdlkeyword">reg</span> <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a>,
<a name="l00056"></a><a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">00056</a> <span class="vhdlkeyword">output</span> <span class="vhdlkeyword">reg</span> <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a>,
<a name="l00057"></a><a class="code" href="classdrv__eth__vga__capture.html#a01507d79c6d97494ec37aa2d1816c0dc">00057</a> <span class="vhdlkeyword">inout</span> [<span class="vhdllogic">15</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__eth__vga__capture.html#a01507d79c6d97494ec37aa2d1816c0dc">enet_data</a>
<a name="l00058"></a>00058 <span class="keyword">//% @}</span>
<a name="l00059"></a>00059 );
<a name="l00060"></a>00060 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__eth__vga__capture.html#a84472d11a61abbc3b23a0e969dbf7034">enet_clk_25</a> = <a class="code" href="classdrv__eth__vga__capture.html#a4be6e1a59f945fb87af42e8d7336216a">clk_25</a>;
<a name="l00061"></a>00061 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__eth__vga__capture.html#ad0ebcebdfa40bfad1f0e1cf767c5f948">enet_reset_n</a> = <a class="code" href="classdrv__eth__vga__capture.html#a7b4e1c4a172b419f95f9874295abca61">reset_n</a>;
<a name="l00062"></a>00062 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__eth__vga__capture.html#acafc6c0c8dba9dc4e5b35d68f9ec30f7">enet_cs_n</a> = <span class="vhdllogic">1'b0</span>;
<a name="l00063"></a>00063
<a name="l00064"></a><a class="code" href="classdrv__eth__vga__capture.html#a6a9445d546ab0169a9fe4cb3704aa543">00064</a> <span class="vhdlkeyword">reg</span> <a class="code" href="classdrv__eth__vga__capture.html#a6a9445d546ab0169a9fe4cb3704aa543">tx_active</a>;
<a name="l00065"></a>00065
<a name="l00066"></a><a class="code" href="classdrv__eth__vga__capture.html#aca885a3a5491cc14142eda9310673ed8">00066</a> <span class="vhdlkeyword">reg</span> <a class="code" href="classdrv__eth__vga__capture.html#aca885a3a5491cc14142eda9310673ed8">enet_data_oe</a>;
<a name="l00067"></a><a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">00067</a> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">15</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a>;
<a name="l00068"></a>00068 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__eth__vga__capture.html#a01507d79c6d97494ec37aa2d1816c0dc">enet_data</a> = (<a class="code" href="classdrv__eth__vga__capture.html#aca885a3a5491cc14142eda9310673ed8">enet_data_oe</a> == <span class="vhdllogic">1'b1</span>)? <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> : <span class="vhdllogic">16'bZ</span>;
<a name="l00069"></a>00069
<a name="l00070"></a>00070 <span class="keyword">//************ packet Ethernet and IP/UDP header contents ROM</span>
<a name="l00071"></a><a class="code" href="classdrv__eth__vga__capture.html#aeade28ddee5ed1bb78359678e1ab0cf7">00071</a> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">5</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__eth__vga__capture.html#aeade28ddee5ed1bb78359678e1ab0cf7">ram_addr</a>;
<a name="l00072"></a><a class="code" href="classdrv__eth__vga__capture.html#aa7984493bef70d30c53190e4c148de89">00072</a> <span class="vhdlkeyword">wire</span> [<span class="vhdllogic">15</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__eth__vga__capture.html#aa7984493bef70d30c53190e4c148de89">ram_q</a>;
<a name="l00073"></a>00073
<a name="l00074"></a><a class="code" href="classdrv__eth__vga__capture.html#a3305dae46003d5c68ca0e917b94aaf4c">00074</a> <a class="code" href="classdrv__eth__vga__capture.html#a3305dae46003d5c68ca0e917b94aaf4c">altsyncram</a> <span class="vhdlchar">ethernet_ram_inst</span>(
<a name="l00075"></a>00075 .<span class="vhdlchar">clock0</span>(<a class="code" href="classdrv__eth__vga__capture.html#a26c09de4c12b15a080f22caec2384eee">clk_30</a>),
<a name="l00076"></a>00076 .<span class="vhdlchar">address_a</span>(<a class="code" href="classdrv__eth__vga__capture.html#aeade28ddee5ed1bb78359678e1ab0cf7">ram_addr</a>),
<a name="l00077"></a>00077 .<span class="vhdlchar">q_a</span>(<a class="code" href="classdrv__eth__vga__capture.html#aa7984493bef70d30c53190e4c148de89">ram_q</a>)
<a name="l00078"></a>00078 );
<a name="l00079"></a>00079 <span class="vhdlkeyword">defparam</span>
<a name="l00080"></a>00080 <span class="vhdlchar">ethernet_ram_inst</span>.<span class="vhdlchar">operation_mode</span> = <span class="keyword">"ROM"</span>,
<a name="l00081"></a>00081 <span class="vhdlchar">ethernet_ram_inst</span>.<span class="vhdlchar">width_a</span> = <span class="vhdllogic">16</span>,
<a name="l00082"></a>00082 <span class="vhdlchar">ethernet_ram_inst</span>.<span class="vhdlchar">widthad_a</span> = <span class="vhdllogic">6</span>,
<a name="l00083"></a>00083 <span class="vhdlchar">ethernet_ram_inst</span>.<span class="vhdlchar">init_file</span> = <span class="keyword">"drv_eth_vga_capture.mif"</span>;
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="keyword">//************ vga burst fifo</span>
<a name="l00086"></a><a class="code" href="classdrv__eth__vga__capture.html#ad99bee321744d2060f563e0e9fec7621">00086</a> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">8</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__eth__vga__capture.html#ad99bee321744d2060f563e0e9fec7621">vga_line_number</a>;
<a name="l00087"></a><a class="code" href="classdrv__eth__vga__capture.html#abd391f89b94948281873e66dc755e8a5">00087</a> <span class="vhdlkeyword">reg</span> <a class="code" href="classdrv__eth__vga__capture.html#abd391f89b94948281873e66dc755e8a5">last_display_valid</a>;
<a name="l00088"></a><a class="code" href="classdrv__eth__vga__capture.html#af66c55790fa554df4a256532b05f4a8c">00088</a> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">1</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__eth__vga__capture.html#af66c55790fa554df4a256532b05f4a8c">select_line</a>;
<a name="l00089"></a><a class="code" href="classdrv__eth__vga__capture.html#a6bf05ed0f0c28e625508269a958497ae">00089</a> <span class="vhdlkeyword">reg</span> <a class="code" href="classdrv__eth__vga__capture.html#a6bf05ed0f0c28e625508269a958497ae">block_wrreq</a>;
<a name="l00090"></a><a class="code" href="classdrv__eth__vga__capture.html#aba39015d08a3c10b35fba8eb4414d008">00090</a> <span class="vhdlkeyword">always</span> @(<span class="vhdlkeyword">posedge</span> <a class="code" href="classdrv__eth__vga__capture.html#a26c09de4c12b15a080f22caec2384eee">clk_30</a> <span class="vhdlkeyword">or</span> <span class="vhdlkeyword">negedge</span> <a class="code" href="classdrv__eth__vga__capture.html#a7b4e1c4a172b419f95f9874295abca61">reset_n</a>) <span class="vhdlkeyword">begin</span>
<a name="l00091"></a>00091 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7b4e1c4a172b419f95f9874295abca61">reset_n</a> == <span class="vhdllogic">1'b0</span>) <span class="vhdlkeyword">begin</span>
<a name="l00092"></a>00092 <a class="code" href="classdrv__eth__vga__capture.html#ad99bee321744d2060f563e0e9fec7621">vga_line_number</a> <= <span class="vhdllogic">9'd0</span>;
<a name="l00093"></a>00093 <a class="code" href="classdrv__eth__vga__capture.html#abd391f89b94948281873e66dc755e8a5">last_display_valid</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00094"></a>00094 <a class="code" href="classdrv__eth__vga__capture.html#af66c55790fa554df4a256532b05f4a8c">select_line</a> <= <span class="vhdllogic">2'd0</span>;
<a name="l00095"></a>00095 <a class="code" href="classdrv__eth__vga__capture.html#a6bf05ed0f0c28e625508269a958497ae">block_wrreq</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00096"></a>00096 <span class="vhdlkeyword">end</span>
<a name="l00097"></a>00097 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">begin</span>
<a name="l00098"></a>00098 <a class="code" href="classdrv__eth__vga__capture.html#abd391f89b94948281873e66dc755e8a5">last_display_valid</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a8acf659337bff5e5bf6b7ab95da464a4">display_valid</a>;
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a23e64f8509cd5130837d5589d6144d0b">fifo_empty</a> == <span class="vhdllogic">1'b0</span> && <a class="code" href="classdrv__eth__vga__capture.html#abd391f89b94948281873e66dc755e8a5">last_display_valid</a> == <span class="vhdllogic">1'b0</span> && <a class="code" href="classdrv__eth__vga__capture.html#a8acf659337bff5e5bf6b7ab95da464a4">display_valid</a> == <span class="vhdllogic">1'b1</span>) <a class="code" href="classdrv__eth__vga__capture.html#a6bf05ed0f0c28e625508269a958497ae">block_wrreq</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00101"></a>00101 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a8acf659337bff5e5bf6b7ab95da464a4">display_valid</a> == <span class="vhdllogic">1'b0</span>) <a class="code" href="classdrv__eth__vga__capture.html#a6bf05ed0f0c28e625508269a958497ae">block_wrreq</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a8acf659337bff5e5bf6b7ab95da464a4">display_valid</a> == <span class="vhdllogic">1'b0</span> && <a class="code" href="classdrv__eth__vga__capture.html#abd391f89b94948281873e66dc755e8a5">last_display_valid</a> == <span class="vhdllogic">1'b1</span>) <span class="vhdlkeyword">begin</span>
<a name="l00104"></a>00104 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#ad99bee321744d2060f563e0e9fec7621">vga_line_number</a> == <span class="vhdllogic">9'd479</span>) <a class="code" href="classdrv__eth__vga__capture.html#ad99bee321744d2060f563e0e9fec7621">vga_line_number</a> <= <span class="vhdllogic">9'd0</span>;
<a name="l00105"></a>00105 <span class="vhdlkeyword">else</span> <a class="code" href="classdrv__eth__vga__capture.html#ad99bee321744d2060f563e0e9fec7621">vga_line_number</a> <= <a class="code" href="classdrv__eth__vga__capture.html#ad99bee321744d2060f563e0e9fec7621">vga_line_number</a> + <span class="vhdllogic">9'd1</span>;
<a name="l00106"></a>00106 <span class="vhdlkeyword">end</span>
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a8acf659337bff5e5bf6b7ab95da464a4">display_valid</a> == <span class="vhdllogic">1'b0</span> && <a class="code" href="classdrv__eth__vga__capture.html#abd391f89b94948281873e66dc755e8a5">last_display_valid</a> == <span class="vhdllogic">1'b1</span> && <a class="code" href="classdrv__eth__vga__capture.html#ad99bee321744d2060f563e0e9fec7621">vga_line_number</a> == <span class="vhdllogic">9'd479</span>) <a class="code" href="classdrv__eth__vga__capture.html#af66c55790fa554df4a256532b05f4a8c">select_line</a> <= <a class="code" href="classdrv__eth__vga__capture.html#af66c55790fa554df4a256532b05f4a8c">select_line</a> + <span class="vhdllogic">2'd1</span>;
<a name="l00109"></a>00109 <span class="vhdlkeyword">end</span>
<a name="l00110"></a>00110 <span class="vhdlkeyword">end</span>
<a name="l00111"></a>00111
<a name="l00112"></a><a class="code" href="classdrv__eth__vga__capture.html#a38a0ce51d1dfba739092251226e2c642">00112</a> <span class="vhdlkeyword">wire</span> <a class="code" href="classdrv__eth__vga__capture.html#a38a0ce51d1dfba739092251226e2c642">fifo_wrreq</a> = (<a class="code" href="classdrv__eth__vga__capture.html#a23e64f8509cd5130837d5589d6144d0b">fifo_empty</a> == <span class="vhdllogic">1'b1</span> || <a class="code" href="classdrv__eth__vga__capture.html#abd391f89b94948281873e66dc755e8a5">last_display_valid</a> == <span class="vhdllogic">1'b1</span>) && <a class="code" href="classdrv__eth__vga__capture.html#a6bf05ed0f0c28e625508269a958497ae">block_wrreq</a> == <span class="vhdllogic">1'b0</span> && <a class="code" href="classdrv__eth__vga__capture.html#a8acf659337bff5e5bf6b7ab95da464a4">display_valid</a> == <span class="vhdllogic">1'b1</span> && <a class="code" href="classdrv__eth__vga__capture.html#af66c55790fa554df4a256532b05f4a8c">select_line</a> == <a class="code" href="classdrv__eth__vga__capture.html#ad99bee321744d2060f563e0e9fec7621">vga_line_number</a>[<span class="vhdllogic">1</span>:<span class="vhdllogic">0</span>];
<a name="l00113"></a><a class="code" href="classdrv__eth__vga__capture.html#a246788022ac009e7a0ed501c4368fa8d">00113</a> <span class="vhdlkeyword">wire</span> <a class="code" href="classdrv__eth__vga__capture.html#a246788022ac009e7a0ed501c4368fa8d">start_load</a> = <a class="code" href="classdrv__eth__vga__capture.html#a23e64f8509cd5130837d5589d6144d0b">fifo_empty</a> == <span class="vhdllogic">1'b0</span>;
<a name="l00114"></a>00114
<a name="l00115"></a><a class="code" href="classdrv__eth__vga__capture.html#a23e64f8509cd5130837d5589d6144d0b">00115</a> <span class="vhdlkeyword">wire</span> <a class="code" href="classdrv__eth__vga__capture.html#a23e64f8509cd5130837d5589d6144d0b">fifo_empty</a>;
<a name="l00116"></a><a class="code" href="classdrv__eth__vga__capture.html#a4718b8c841f8694e680df02aae2b33a4">00116</a> <span class="vhdlkeyword">wire</span> [<span class="vhdllogic">11</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__eth__vga__capture.html#a4718b8c841f8694e680df02aae2b33a4">fifo_q</a>;
<a name="l00117"></a>00117
<a name="l00118"></a><a class="code" href="classdrv__eth__vga__capture.html#a59768c08add982f9d20148482217c411">00118</a> <a class="code" href="classdrv__eth__vga__capture.html#a59768c08add982f9d20148482217c411">scfifo</a> <span class="vhdlchar">vga_fifo_inst</span>(
<a name="l00119"></a>00119 .<span class="vhdlchar">clock</span>(<a class="code" href="classdrv__eth__vga__capture.html#a26c09de4c12b15a080f22caec2384eee">clk_30</a>),
<a name="l00120"></a>00120 .<span class="vhdlchar">data</span>( { <a class="code" href="classdrv__eth__vga__capture.html#a1b7bef5ae7965541b6829e0582237a53">vga_r</a>[<span class="vhdllogic">9</span>:<span class="vhdllogic">6</span>], <a class="code" href="classdrv__eth__vga__capture.html#a3002998608bbca4b043ef32814a0e90c">vga_g</a>[<span class="vhdllogic">9</span>:<span class="vhdllogic">6</span>], <a class="code" href="classdrv__eth__vga__capture.html#a5c46fd036c0ceb4ca62ee992f3a3f8cd">vga_b</a>[<span class="vhdllogic">9</span>:<span class="vhdllogic">6</span>] } ),
<a name="l00121"></a>00121 .<span class="vhdlchar">wrreq</span>(<a class="code" href="classdrv__eth__vga__capture.html#a38a0ce51d1dfba739092251226e2c642">fifo_wrreq</a>),
<a name="l00122"></a>00122 .<span class="vhdlchar">rdreq</span>(<a class="code" href="classdrv__eth__vga__capture.html#ad4ef489b0816e0c8849b5c3a588e1d11">fifo_rdreq</a>),
<a name="l00123"></a>00123
<a name="l00124"></a>00124 .<span class="vhdlchar">empty</span>(<a class="code" href="classdrv__eth__vga__capture.html#a23e64f8509cd5130837d5589d6144d0b">fifo_empty</a>),
<a name="l00125"></a>00125 .<span class="vhdlchar">q</span>(<a class="code" href="classdrv__eth__vga__capture.html#a4718b8c841f8694e680df02aae2b33a4">fifo_q</a>)
<a name="l00126"></a>00126 );
<a name="l00127"></a>00127 <span class="vhdlkeyword">defparam</span>
<a name="l00128"></a>00128 <span class="vhdlchar">vga_fifo_inst</span>.<span class="vhdlchar">lpm_width</span> = <span class="vhdllogic">12</span>,
<a name="l00129"></a>00129 <span class="vhdlchar">vga_fifo_inst</span>.<span class="vhdlchar">lpm_numwords</span> = <span class="vhdllogic">1024</span>;
<a name="l00130"></a>00130
<a name="l00131"></a><a class="code" href="classdrv__eth__vga__capture.html#ad4ef489b0816e0c8849b5c3a588e1d11">00131</a> <span class="vhdlkeyword">reg</span> <a class="code" href="classdrv__eth__vga__capture.html#ad4ef489b0816e0c8849b5c3a588e1d11">fifo_rdreq</a>;
<a name="l00132"></a><a class="code" href="classdrv__eth__vga__capture.html#a6ef0f10045357015c38f6fd3bc181d78">00132</a> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">1</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__eth__vga__capture.html#a6ef0f10045357015c38f6fd3bc181d78">fifo_rd_cnt</a>;
<a name="l00133"></a><a class="code" href="classdrv__eth__vga__capture.html#a762873b5a64a5eecb15b8721a83ef6f8">00133</a> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">11</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__eth__vga__capture.html#a762873b5a64a5eecb15b8721a83ef6f8">last_fifo_q</a>;
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="keyword">//************</span>
<a name="l00136"></a>00136
<a name="l00137"></a><a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">00137</a> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">15</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a>;
<a name="l00138"></a><a class="code" href="classdrv__eth__vga__capture.html#afdf02062e063a6e1eb35038084a33d12">00138</a> <span class="vhdlkeyword">always</span> @(<span class="vhdlkeyword">posedge</span> <a class="code" href="classdrv__eth__vga__capture.html#a26c09de4c12b15a080f22caec2384eee">clk_30</a> <span class="vhdlkeyword">or</span> <span class="vhdlkeyword">negedge</span> <a class="code" href="classdrv__eth__vga__capture.html#a7b4e1c4a172b419f95f9874295abca61">reset_n</a>) <span class="vhdlkeyword">begin</span>
<a name="l00139"></a>00139 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7b4e1c4a172b419f95f9874295abca61">reset_n</a> == <span class="vhdllogic">1'b0</span>) <span class="vhdlkeyword">begin</span>
<a name="l00140"></a>00140 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <span class="vhdllogic">16'd0</span>;
<a name="l00141"></a>00141 <a class="code" href="classdrv__eth__vga__capture.html#a6a9445d546ab0169a9fe4cb3704aa543">tx_active</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00142"></a>00142
<a name="l00143"></a>00143 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00144"></a>00144 <a class="code" href="classdrv__eth__vga__capture.html#acc5370f78bef4d859ab318c252e0d4d3">enet_ior_n</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00145"></a>00145 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b0</span>; <span class="keyword">// low: INDEX, high: DATA</span>
<a name="l00146"></a>00146 <a class="code" href="classdrv__eth__vga__capture.html#aca885a3a5491cc14142eda9310673ed8">enet_data_oe</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00147"></a>00147 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= <span class="vhdllogic">16'd0</span>;
<a name="l00148"></a>00148
<a name="l00149"></a>00149 <a class="code" href="classdrv__eth__vga__capture.html#aeade28ddee5ed1bb78359678e1ab0cf7">ram_addr</a> <= <span class="vhdllogic">6'd0</span>;
<a name="l00150"></a>00150
<a name="l00151"></a>00151 <a class="code" href="classdrv__eth__vga__capture.html#ad4ef489b0816e0c8849b5c3a588e1d11">fifo_rdreq</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00152"></a>00152 <a class="code" href="classdrv__eth__vga__capture.html#a6ef0f10045357015c38f6fd3bc181d78">fifo_rd_cnt</a> <= <span class="vhdllogic">2'd0</span>;
<a name="l00153"></a>00153 <a class="code" href="classdrv__eth__vga__capture.html#a762873b5a64a5eecb15b8721a83ef6f8">last_fifo_q</a> <= <span class="vhdllogic">12'd0</span>;
<a name="l00154"></a>00154 <span class="vhdlkeyword">end</span>
<a name="l00155"></a>00155 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd50000</span>) <span class="vhdlkeyword">begin</span>
<a name="l00156"></a>00156 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00157"></a>00157 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00158"></a>00158 <a class="code" href="classdrv__eth__vga__capture.html#aca885a3a5491cc14142eda9310673ed8">enet_data_oe</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00159"></a>00159 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <span class="vhdllogic">8'd0</span>, <span class="vhdllogic">8'hFF</span> }; <span class="keyword">// set IMR(FFh = 0x80)</span>
<a name="l00160"></a>00160
<a name="l00161"></a>00161 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00162"></a>00162 <span class="vhdlkeyword">end</span>
<a name="l00163"></a>00163 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd50002</span>) <span class="vhdlkeyword">begin</span>
<a name="l00164"></a>00164 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00165"></a>00165 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00166"></a>00166 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <span class="vhdllogic">8'd0</span>, <span class="vhdllogic">8'h80</span> };
<a name="l00167"></a>00167
<a name="l00168"></a>00168 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00169"></a>00169 <span class="vhdlkeyword">end</span>
<a name="l00170"></a>00170 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd50005</span>) <span class="vhdlkeyword">begin</span>
<a name="l00171"></a>00171 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00172"></a>00172 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00173"></a>00173 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <span class="vhdllogic">8'd0</span>, <span class="vhdllogic">8'h1F</span> }; <span class="keyword">// power-up PHY (1Fh = 0x00)</span>
<a name="l00174"></a>00174
<a name="l00175"></a>00175 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00176"></a>00176 <span class="vhdlkeyword">end</span>
<a name="l00177"></a>00177 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd50007</span>) <span class="vhdlkeyword">begin</span>
<a name="l00178"></a>00178 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00179"></a>00179 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00180"></a>00180 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <span class="vhdllogic">8'd0</span>, <span class="vhdllogic">8'h00</span> };
<a name="l00181"></a>00181
<a name="l00182"></a>00182 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00183"></a>00183 <span class="vhdlkeyword">end</span>
<a name="l00184"></a>00184
<a name="l00185"></a>00185 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd50010</span>) <span class="vhdlkeyword">begin</span>
<a name="l00186"></a>00186 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00187"></a>00187 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00188"></a>00188 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <span class="vhdllogic">8'd0</span>, <span class="vhdllogic">8'h31</span> }; <span class="keyword">// set checksum reg (31h = 0x05)</span>
<a name="l00189"></a>00189
<a name="l00190"></a>00190 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00191"></a>00191 <span class="vhdlkeyword">end</span>
<a name="l00192"></a>00192 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd50012</span>) <span class="vhdlkeyword">begin</span>
<a name="l00193"></a>00193 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00194"></a>00194 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00195"></a>00195 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <span class="vhdllogic">8'd0</span>, <span class="vhdllogic">8'h05</span> };
<a name="l00196"></a>00196
<a name="l00197"></a>00197 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00198"></a>00198 <span class="vhdlkeyword">end</span>
<a name="l00199"></a>00199
<a name="l00200"></a>00200
<a name="l00201"></a>00201 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd50018</span>) <span class="vhdlkeyword">begin</span>
<a name="l00202"></a>00202 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00203"></a>00203 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00204"></a>00204 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <span class="vhdllogic">8'd0</span>, <span class="vhdllogic">8'hF8</span> }; <span class="keyword">// set MWCMD(F8h = 16-bit data) </span>
<a name="l00205"></a>00205
<a name="l00206"></a>00206 <a class="code" href="classdrv__eth__vga__capture.html#aeade28ddee5ed1bb78359678e1ab0cf7">ram_addr</a> <= <span class="vhdllogic">6'd0</span>;
<a name="l00207"></a>00207 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00208"></a>00208 <span class="vhdlkeyword">end</span>
<a name="l00209"></a>00209 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> >= <span class="vhdllogic">16'd50020</span> && <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <span class="vhdllogic">16'd50060</span> && <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a>[<span class="vhdllogic">0</span>] == <span class="vhdllogic">1'b0</span>) <span class="vhdlkeyword">begin</span>
<a name="l00210"></a>00210 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00211"></a>00211 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00212"></a>00212 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= <a class="code" href="classdrv__eth__vga__capture.html#aa7984493bef70d30c53190e4c148de89">ram_q</a>;
<a name="l00213"></a>00213
<a name="l00214"></a>00214 <a class="code" href="classdrv__eth__vga__capture.html#aeade28ddee5ed1bb78359678e1ab0cf7">ram_addr</a> <= <a class="code" href="classdrv__eth__vga__capture.html#aeade28ddee5ed1bb78359678e1ab0cf7">ram_addr</a> + <span class="vhdllogic">6'd1</span>;
<a name="l00215"></a>00215 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00216"></a>00216 <span class="vhdlkeyword">end</span>
<a name="l00217"></a>00217 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd50062</span>) <span class="vhdlkeyword">begin</span>
<a name="l00218"></a>00218 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a246788022ac009e7a0ed501c4368fa8d">start_load</a> == <span class="vhdllogic">1'b1</span>) <span class="vhdlkeyword">begin</span>
<a name="l00219"></a>00219 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00220"></a>00220 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00221"></a>00221 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <span class="vhdllogic">7'd0</span>, <a class="code" href="classdrv__eth__vga__capture.html#ad99bee321744d2060f563e0e9fec7621">vga_line_number</a> };
<a name="l00222"></a>00222
<a name="l00223"></a>00223 <a class="code" href="classdrv__eth__vga__capture.html#ad4ef489b0816e0c8849b5c3a588e1d11">fifo_rdreq</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00224"></a>00224 <a class="code" href="classdrv__eth__vga__capture.html#a6ef0f10045357015c38f6fd3bc181d78">fifo_rd_cnt</a> <= <span class="vhdllogic">2'd0</span>;
<a name="l00225"></a>00225 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00226"></a>00226 <span class="vhdlkeyword">end</span>
<a name="l00227"></a>00227 <span class="vhdlkeyword">end</span>
<a name="l00228"></a>00228 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd50063</span>) <span class="vhdlkeyword">begin</span>
<a name="l00229"></a>00229 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00230"></a>00230 <a class="code" href="classdrv__eth__vga__capture.html#ad4ef489b0816e0c8849b5c3a588e1d11">fifo_rdreq</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00231"></a>00231 <a class="code" href="classdrv__eth__vga__capture.html#a762873b5a64a5eecb15b8721a83ef6f8">last_fifo_q</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a4718b8c841f8694e680df02aae2b33a4">fifo_q</a>;
<a name="l00232"></a>00232 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00233"></a>00233 <span class="vhdlkeyword">end</span>
<a name="l00234"></a>00234
<a name="l00235"></a>00235
<a name="l00236"></a>00236 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> >= <span class="vhdllogic">16'd50064</span> && <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <span class="vhdllogic">16'd51022</span> && <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a>[<span class="vhdllogic">0</span>] == <span class="vhdllogic">1'b0</span>) <span class="vhdlkeyword">begin</span>
<a name="l00237"></a>00237 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00238"></a>00238 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00239"></a>00239
<a name="l00240"></a>00240 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a6ef0f10045357015c38f6fd3bc181d78">fifo_rd_cnt</a> == <span class="vhdllogic">2'd0</span>) <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <a class="code" href="classdrv__eth__vga__capture.html#a4718b8c841f8694e680df02aae2b33a4">fifo_q</a>[<span class="vhdllogic">3</span>:<span class="vhdllogic">0</span>], <a class="code" href="classdrv__eth__vga__capture.html#a762873b5a64a5eecb15b8721a83ef6f8">last_fifo_q</a> };
<a name="l00241"></a>00241 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a6ef0f10045357015c38f6fd3bc181d78">fifo_rd_cnt</a> == <span class="vhdllogic">2'd1</span>)<a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <a class="code" href="classdrv__eth__vga__capture.html#a4718b8c841f8694e680df02aae2b33a4">fifo_q</a>[<span class="vhdllogic">7</span>:<span class="vhdllogic">0</span>], <a class="code" href="classdrv__eth__vga__capture.html#a762873b5a64a5eecb15b8721a83ef6f8">last_fifo_q</a>[<span class="vhdllogic">11</span>:<span class="vhdllogic">4</span>] };
<a name="l00242"></a>00242 <span class="vhdlkeyword">else</span> <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <a class="code" href="classdrv__eth__vga__capture.html#a4718b8c841f8694e680df02aae2b33a4">fifo_q</a>, <a class="code" href="classdrv__eth__vga__capture.html#a762873b5a64a5eecb15b8721a83ef6f8">last_fifo_q</a>[<span class="vhdllogic">11</span>:<span class="vhdllogic">8</span>] };
<a name="l00243"></a>00243
<a name="l00244"></a>00244 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a6ef0f10045357015c38f6fd3bc181d78">fifo_rd_cnt</a> == <span class="vhdllogic">2'd2</span>) <a class="code" href="classdrv__eth__vga__capture.html#ad4ef489b0816e0c8849b5c3a588e1d11">fifo_rdreq</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00245"></a>00245 <span class="vhdlkeyword">else</span> <a class="code" href="classdrv__eth__vga__capture.html#ad4ef489b0816e0c8849b5c3a588e1d11">fifo_rdreq</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00246"></a>00246
<a name="l00247"></a>00247 <a class="code" href="classdrv__eth__vga__capture.html#a6ef0f10045357015c38f6fd3bc181d78">fifo_rd_cnt</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a6ef0f10045357015c38f6fd3bc181d78">fifo_rd_cnt</a> + <span class="vhdllogic">2'd1</span>;
<a name="l00248"></a>00248 <a class="code" href="classdrv__eth__vga__capture.html#a762873b5a64a5eecb15b8721a83ef6f8">last_fifo_q</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a4718b8c841f8694e680df02aae2b33a4">fifo_q</a>;
<a name="l00249"></a>00249
<a name="l00250"></a>00250 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd51022</span>) <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <span class="vhdllogic">16'd60016</span> - <span class="vhdllogic">16'd1</span>;
<a name="l00251"></a>00251 <span class="vhdlkeyword">else</span> <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00252"></a>00252 <span class="vhdlkeyword">end</span>
<a name="l00253"></a>00253 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> >= <span class="vhdllogic">16'd50064</span> && <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <span class="vhdllogic">16'd51022</span> && <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a>[<span class="vhdllogic">0</span>] == <span class="vhdllogic">1'b1</span> && <a class="code" href="classdrv__eth__vga__capture.html#a6ef0f10045357015c38f6fd3bc181d78">fifo_rd_cnt</a> == <span class="vhdllogic">2'd3</span>) <span class="vhdlkeyword">begin</span>
<a name="l00254"></a>00254 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00255"></a>00255 <a class="code" href="classdrv__eth__vga__capture.html#ad4ef489b0816e0c8849b5c3a588e1d11">fifo_rdreq</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00256"></a>00256 <a class="code" href="classdrv__eth__vga__capture.html#a762873b5a64a5eecb15b8721a83ef6f8">last_fifo_q</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a4718b8c841f8694e680df02aae2b33a4">fifo_q</a>;
<a name="l00257"></a>00257 <a class="code" href="classdrv__eth__vga__capture.html#a6ef0f10045357015c38f6fd3bc181d78">fifo_rd_cnt</a> <= <span class="vhdllogic">2'd0</span>;
<a name="l00258"></a>00258 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00259"></a>00259 <span class="vhdlkeyword">end</span>
<a name="l00260"></a>00260 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> >= <span class="vhdllogic">16'd50064</span> && <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <span class="vhdllogic">16'd51022</span> && <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a>[<span class="vhdllogic">0</span>] == <span class="vhdllogic">1'b1</span>) <span class="vhdlkeyword">begin</span>
<a name="l00261"></a>00261 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00262"></a>00262 <a class="code" href="classdrv__eth__vga__capture.html#ad4ef489b0816e0c8849b5c3a588e1d11">fifo_rdreq</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00263"></a>00263 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00264"></a>00264 <span class="vhdlkeyword">end</span>
<a name="l00265"></a>00265
<a name="l00266"></a>00266
<a name="l00267"></a>00267 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd60016</span>) <span class="vhdlkeyword">begin</span>
<a name="l00268"></a>00268 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00269"></a>00269 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00270"></a>00270 <a class="code" href="classdrv__eth__vga__capture.html#aca885a3a5491cc14142eda9310673ed8">enet_data_oe</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00271"></a>00271 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <span class="vhdllogic">8'd0</span>, <span class="vhdllogic">8'h02</span> }; <span class="keyword">// read TX(02h bit 0 == 0)</span>
<a name="l00272"></a>00272
<a name="l00273"></a>00273 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00274"></a>00274 <span class="vhdlkeyword">end</span>
<a name="l00275"></a>00275 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd60018</span>) <span class="vhdlkeyword">begin</span>
<a name="l00276"></a>00276 <a class="code" href="classdrv__eth__vga__capture.html#acc5370f78bef4d859ab318c252e0d4d3">enet_ior_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00277"></a>00277 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00278"></a>00278 <a class="code" href="classdrv__eth__vga__capture.html#aca885a3a5491cc14142eda9310673ed8">enet_data_oe</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00279"></a>00279
<a name="l00280"></a>00280 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00281"></a>00281 <span class="vhdlkeyword">end</span>
<a name="l00282"></a>00282 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd60020</span>) <span class="vhdlkeyword">begin</span>
<a name="l00283"></a>00283 <a class="code" href="classdrv__eth__vga__capture.html#acc5370f78bef4d859ab318c252e0d4d3">enet_ior_n</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00284"></a>00284 <a class="code" href="classdrv__eth__vga__capture.html#a6a9445d546ab0169a9fe4cb3704aa543">tx_active</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a01507d79c6d97494ec37aa2d1816c0dc">enet_data</a>[<span class="vhdllogic">0</span>];
<a name="l00285"></a>00285
<a name="l00286"></a>00286 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00287"></a>00287 <span class="vhdlkeyword">end</span>
<a name="l00288"></a>00288 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd60022</span>) <span class="vhdlkeyword">begin</span>
<a name="l00289"></a>00289 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a6a9445d546ab0169a9fe4cb3704aa543">tx_active</a> == <span class="vhdllogic">1'b0</span>) <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <span class="vhdllogic">16'd60118</span>;
<a name="l00290"></a>00290 <span class="vhdlkeyword">else</span> <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <span class="vhdllogic">16'd60016</span>;
<a name="l00291"></a>00291 <span class="vhdlkeyword">end</span>
<a name="l00292"></a>00292
<a name="l00293"></a>00293 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd60118</span>) <span class="vhdlkeyword">begin</span>
<a name="l00294"></a>00294 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00295"></a>00295 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00296"></a>00296 <a class="code" href="classdrv__eth__vga__capture.html#aca885a3a5491cc14142eda9310673ed8">enet_data_oe</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00297"></a>00297 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <span class="vhdllogic">8'd0</span>, <span class="vhdllogic">8'hFC</span> }; <span class="keyword">// set TXPLL(FCh = low byte)</span>
<a name="l00298"></a>00298
<a name="l00299"></a>00299 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00300"></a>00300 <span class="vhdlkeyword">end</span>
<a name="l00301"></a>00301 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd60120</span>) <span class="vhdlkeyword">begin</span>
<a name="l00302"></a>00302 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00303"></a>00303 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00304"></a>00304 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <span class="vhdllogic">8'h00</span>, <span class="vhdllogic">8'hEC</span> };
<a name="l00305"></a>00305
<a name="l00306"></a>00306 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00307"></a>00307 <span class="vhdlkeyword">end</span>
<a name="l00308"></a>00308
<a name="l00309"></a>00309 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd60123</span>) <span class="vhdlkeyword">begin</span>
<a name="l00310"></a>00310 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00311"></a>00311 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00312"></a>00312 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <span class="vhdllogic">8'd0</span>, <span class="vhdllogic">8'hFD</span> }; <span class="keyword">// set TXPLH(FDh = high byte)</span>
<a name="l00313"></a>00313
<a name="l00314"></a>00314 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00315"></a>00315 <span class="vhdlkeyword">end</span>
<a name="l00316"></a>00316 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd60125</span>) <span class="vhdlkeyword">begin</span>
<a name="l00317"></a>00317 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00318"></a>00318 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00319"></a>00319 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <span class="vhdllogic">8'h00</span>, <span class="vhdllogic">8'h03</span> };
<a name="l00320"></a>00320
<a name="l00321"></a>00321 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00322"></a>00322 <span class="vhdlkeyword">end</span>
<a name="l00323"></a>00323
<a name="l00324"></a>00324 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd60128</span>) <span class="vhdlkeyword">begin</span>
<a name="l00325"></a>00325 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00326"></a>00326 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00327"></a>00327 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <span class="vhdllogic">8'd0</span>, <span class="vhdllogic">8'h02</span> }; <span class="keyword">// write TX(02h = 0x01)</span>
<a name="l00328"></a>00328
<a name="l00329"></a>00329 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00330"></a>00330 <span class="vhdlkeyword">end</span>
<a name="l00331"></a>00331 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd60130</span>) <span class="vhdlkeyword">begin</span>
<a name="l00332"></a>00332 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00333"></a>00333 <a class="code" href="classdrv__eth__vga__capture.html#ac4e7f4f3150f9b367ba373fe2d093a1c">enet_cmd</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00334"></a>00334 <a class="code" href="classdrv__eth__vga__capture.html#aaf032c46a012fcc50baedece317e4418">enet_data_out</a> <= { <span class="vhdllogic">8'h00</span>, <span class="vhdllogic">8'h01</span> };
<a name="l00335"></a>00335
<a name="l00336"></a>00336 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00337"></a>00337 <span class="vhdlkeyword">end</span>
<a name="l00338"></a>00338
<a name="l00339"></a>00339 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> == <span class="vhdllogic">16'd60132</span>) <span class="vhdlkeyword">begin</span>
<a name="l00340"></a>00340 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <span class="vhdllogic">16'd50018</span>;
<a name="l00341"></a>00341 <span class="vhdlkeyword">end</span>
<a name="l00342"></a>00342
<a name="l00343"></a>00343 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <span class="vhdllogic">16'd60132</span>) <span class="vhdlkeyword">begin</span>
<a name="l00344"></a>00344 <a class="code" href="classdrv__eth__vga__capture.html#a101095dd45e6bf8d75d2eb42779185a3">enet_iow_n</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00345"></a>00345 <a class="code" href="classdrv__eth__vga__capture.html#acc5370f78bef4d859ab318c252e0d4d3">enet_ior_n</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00346"></a>00346 <a class="code" href="classdrv__eth__vga__capture.html#ad4ef489b0816e0c8849b5c3a588e1d11">fifo_rdreq</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00347"></a>00347 <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> <= <a class="code" href="classdrv__eth__vga__capture.html#a7349e4e8b9da301884c10edaf7642c49">state_counter</a> + <span class="vhdllogic">16'd1</span>;
<a name="l00348"></a>00348 <span class="vhdlkeyword">end</span>
<a name="l00349"></a>00349
<a name="l00350"></a>00350 <span class="vhdlkeyword">end</span>
<a name="l00351"></a>00351
<a name="l00352"></a>00352 <span class="vhdlkeyword">endmodule</span>
</pre></div></div>
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.2 </small></address>
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