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<h1>drv_vga.v</h1> </div>
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<a href="drv__vga_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 ADV7123 Video DAC driver for VGA output.</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_vga.v</span>
<a name="l00030"></a>00030 <span class="keyword">*/</span>
<a name="l00031"></a><a class="code" href="classdrv__vga.html">00031</a> <span class="vhdlkeyword">module</span> <a class="code" href="classdrv__vga.html">drv_vga</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__vga.html#a6400b0e4b90964b25c3f763e19b138d9">00034</a> <span class="vhdlkeyword">input</span> <a class="code" href="classdrv__vga.html#a6400b0e4b90964b25c3f763e19b138d9">clk_30</a>,
<a name="l00035"></a><a class="code" href="classdrv__vga.html#a6ceec01e795fdf21d7a2ccc5b78549ab">00035</a> <span class="vhdlkeyword">input</span> <a class="code" href="classdrv__vga.html#a6ceec01e795fdf21d7a2ccc5b78549ab">reset_n</a>,
<a name="l00036"></a>00036 <span class="keyword">//% @}</span>
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="keyword">//% \name On-Screen-Display management interface
</span>
<a name="l00039"></a>00039 <span class="keyword">//% @{</span>
<a name="l00040"></a><a class="code" href="classdrv__vga.html#a7c72d1d36e519c384a173325a101c738">00040</a> <span class="vhdlkeyword">input</span> <a class="code" href="classdrv__vga.html#a7c72d1d36e519c384a173325a101c738">management_mode</a>,
<a name="l00041"></a><a class="code" href="classdrv__vga.html#ab7f595d93fa3723c61f056ad13e4b95b">00041</a> <span class="vhdlkeyword">input</span> <a class="code" href="classdrv__vga.html#ab7f595d93fa3723c61f056ad13e4b95b">on_screen_display</a>,
<a name="l00042"></a><a class="code" href="classdrv__vga.html#a10a45704e7923788c0d10c21c623ac4f">00042</a> <span class="vhdlkeyword">output</span> [<span class="vhdllogic">4</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#a10a45704e7923788c0d10c21c623ac4f">osd_line</a>,
<a name="l00043"></a><a class="code" href="classdrv__vga.html#aa1cc640088b50fda8dd9a874d1abd909">00043</a> <span class="vhdlkeyword">output</span> [<span class="vhdllogic">4</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#aa1cc640088b50fda8dd9a874d1abd909">osd_column</a>,
<a name="l00044"></a><a class="code" href="classdrv__vga.html#a38feb3e41812bbabd4d64c418a6fb622">00044</a> <span class="vhdlkeyword">input</span> [<span class="vhdllogic">7</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#a38feb3e41812bbabd4d64c418a6fb622">character</a>,
<a name="l00045"></a>00045 <span class="keyword">//% @}</span>
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="keyword">//% \name Control signal for VGA capture
</span>
<a name="l00048"></a>00048 <span class="keyword">//% @{</span>
<a name="l00049"></a><a class="code" href="classdrv__vga.html#ad3b09207753c04efb6a28109361c0848">00049</a> <span class="vhdlkeyword">output</span> <a class="code" href="classdrv__vga.html#ad3b09207753c04efb6a28109361c0848">display_valid</a>,
<a name="l00050"></a>00050 <span class="keyword">//% @}</span>
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="keyword">//% \name Direct drv_ssram burst read DMA video interface
</span>
<a name="l00053"></a>00053 <span class="keyword">//% @{</span>
<a name="l00054"></a><a class="code" href="classdrv__vga.html#aba05385922a89053d0ea07a6543978c1">00054</a> <span class="vhdlkeyword">output</span> <span class="vhdlkeyword">reg</span> <a class="code" href="classdrv__vga.html#aba05385922a89053d0ea07a6543978c1">burst_read_request</a>,
<a name="l00055"></a><a class="code" href="classdrv__vga.html#aa909360705ddfb7c3bddc854ddf5245b">00055</a> <span class="vhdlkeyword">output</span> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">31</span>:<span class="vhdllogic">2</span>] <a class="code" href="classdrv__vga.html#aa909360705ddfb7c3bddc854ddf5245b">burst_read_address</a>,
<a name="l00056"></a><a class="code" href="classdrv__vga.html#a6885e8a9dddd0d46eb48885c1d14104d">00056</a> <span class="vhdlkeyword">input</span> <a class="code" href="classdrv__vga.html#a6885e8a9dddd0d46eb48885c1d14104d">burst_read_ready</a>,
<a name="l00057"></a><a class="code" href="classdrv__vga.html#aeccacb0a76a1694e3db88b8757f934d5">00057</a> <span class="vhdlkeyword">input</span> [<span class="vhdllogic">35</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#aeccacb0a76a1694e3db88b8757f934d5">burst_read_data</a>,
<a name="l00058"></a>00058 <span class="keyword">//% @}</span>
<a name="l00059"></a>00059
<a name="l00060"></a>00060 <span class="keyword">//% \name ADV7123 Video DAC hardware interface
</span>
<a name="l00061"></a>00061 <span class="keyword">//% @{</span>
<a name="l00062"></a><a class="code" href="classdrv__vga.html#ae093cf39ab1b80814194c6eb1ab39c2f">00062</a> <span class="vhdlkeyword">output</span> [<span class="vhdllogic">9</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#ae093cf39ab1b80814194c6eb1ab39c2f">vga_r</a>,
<a name="l00063"></a><a class="code" href="classdrv__vga.html#af4d7be7b44d78e0185b57899db4649d2">00063</a> <span class="vhdlkeyword">output</span> [<span class="vhdllogic">9</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#af4d7be7b44d78e0185b57899db4649d2">vga_g</a>,
<a name="l00064"></a><a class="code" href="classdrv__vga.html#acd92e53e6d10225e6d4aa1cc962be209">00064</a> <span class="vhdlkeyword">output</span> [<span class="vhdllogic">9</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#acd92e53e6d10225e6d4aa1cc962be209">vga_b</a>,
<a name="l00065"></a><a class="code" href="classdrv__vga.html#af868e9c418e06b2ff0357f2e846226b3">00065</a> <span class="vhdlkeyword">output</span> <a class="code" href="classdrv__vga.html#af868e9c418e06b2ff0357f2e846226b3">vga_blank_n</a>,
<a name="l00066"></a><a class="code" href="classdrv__vga.html#a463ddc5575768d453d2231f3dcf26738">00066</a> <span class="vhdlkeyword">output</span> <a class="code" href="classdrv__vga.html#a463ddc5575768d453d2231f3dcf26738">vga_sync_n</a>,
<a name="l00067"></a><a class="code" href="classdrv__vga.html#aa7471e76f774550772ce1b69d44638d1">00067</a> <span class="vhdlkeyword">output</span> <a class="code" href="classdrv__vga.html#aa7471e76f774550772ce1b69d44638d1">vga_clock</a>,
<a name="l00068"></a><a class="code" href="classdrv__vga.html#abb6a6625a5d411c83df0b1d3afa35a7a">00068</a> <span class="vhdlkeyword">output</span> <a class="code" href="classdrv__vga.html#abb6a6625a5d411c83df0b1d3afa35a7a">vga_hsync</a>,
<a name="l00069"></a><a class="code" href="classdrv__vga.html#a362ab6edf9ff37ff6f51f8c7c42a0ebf">00069</a> <span class="vhdlkeyword">output</span> <a class="code" href="classdrv__vga.html#a362ab6edf9ff37ff6f51f8c7c42a0ebf">vga_vsync</a>
<a name="l00070"></a>00070 <span class="keyword">//% @}</span>
<a name="l00071"></a>00071 );
<a name="l00072"></a>00072
<a name="l00073"></a><a class="code" href="classdrv__vga.html#ae70561ced7c536531311b8865aa9ca5f">00073</a> <span class="preprocessor">`define</span> <a class="code" href="classdrv__vga.html#ae70561ced7c536531311b8865aa9ca5f">VGA_VIDEO_BUFFER</a> <span class="vhdllogic">32'h10180000</span>
<a name="l00074"></a><a class="code" href="classdrv__vga.html#aba4ec979e464a3b40494f4d6aef18710">00074</a> <span class="preprocessor">`define</span> <a class="code" href="classdrv__vga.html#aba4ec979e464a3b40494f4d6aef18710">VGA_VIDEO_BUFFER_DIV_4</a> <span class="vhdllogic">30'h04060000</span>
<a name="l00075"></a>00075
<a name="l00076"></a>00076 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#af868e9c418e06b2ff0357f2e846226b3">vga_blank_n</a> = <span class="vhdllogic">1'b1</span>;
<a name="l00077"></a>00077 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#a463ddc5575768d453d2231f3dcf26738">vga_sync_n</a> = <span class="vhdllogic">1'b0</span>;
<a name="l00078"></a>00078 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#aa7471e76f774550772ce1b69d44638d1">vga_clock</a> = <a class="code" href="classdrv__vga.html#a6400b0e4b90964b25c3f763e19b138d9">clk_30</a>;
<a name="l00079"></a>00079
<a name="l00080"></a><a class="code" href="classdrv__vga.html#a5a908124ef208bf84998f7cde2c452d8">00080</a> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">7</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#a5a908124ef208bf84998f7cde2c452d8">address_a</a>;
<a name="l00081"></a><a class="code" href="classdrv__vga.html#abada63beb55063be05d88df41af318fa">00081</a> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">7</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#abada63beb55063be05d88df41af318fa">address_b</a>;
<a name="l00082"></a><a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">00082</a> <span class="vhdlkeyword">wire</span> [<span class="vhdllogic">35</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>;
<a name="l00083"></a><a class="code" href="classdrv__vga.html#a34fbd3b7c69bd1aac8f11bfd9871d808">00083</a> <a class="code" href="classdrv__vga.html#a73ed539019cb91cac1dba5720b142a01">altsyncram</a> <span class="vhdlchar">line_ram_inst</span>(
<a name="l00084"></a>00084 .<span class="vhdlchar">clock0</span>(<a class="code" href="classdrv__vga.html#a6400b0e4b90964b25c3f763e19b138d9">clk_30</a>),
<a name="l00085"></a>00085 .<a class="code" href="classdrv__vga.html#a5a908124ef208bf84998f7cde2c452d8">address_a</a>(<a class="code" href="classdrv__vga.html#a5a908124ef208bf84998f7cde2c452d8">address_a</a>),
<a name="l00086"></a>00086 .<span class="vhdlchar">wren_a</span>(<a class="code" href="classdrv__vga.html#a6885e8a9dddd0d46eb48885c1d14104d">burst_read_ready</a>),
<a name="l00087"></a>00087 .<span class="vhdlchar">data_a</span>(<a class="code" href="classdrv__vga.html#aeccacb0a76a1694e3db88b8757f934d5">burst_read_data</a>),
<a name="l00088"></a>00088
<a name="l00089"></a>00089 .<span class="vhdlchar">clock1</span>(<a class="code" href="classdrv__vga.html#a6400b0e4b90964b25c3f763e19b138d9">clk_30</a>),
<a name="l00090"></a>00090 .<a class="code" href="classdrv__vga.html#abada63beb55063be05d88df41af318fa">address_b</a>(<a class="code" href="classdrv__vga.html#abada63beb55063be05d88df41af318fa">address_b</a>),
<a name="l00091"></a>00091 .<a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>(<a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>)
<a name="l00092"></a>00092 );
<a name="l00093"></a>00093 <span class="vhdlkeyword">defparam</span> <span class="vhdlchar">line_ram_inst</span>.<span class="vhdlchar">operation_mode</span> = <span class="keyword">"DUAL_PORT"</span>,
<a name="l00094"></a>00094 <span class="vhdlchar">line_ram_inst</span>.<span class="vhdlchar">width_a</span> = <span class="vhdllogic">36</span>,
<a name="l00095"></a>00095 <span class="vhdlchar">line_ram_inst</span>.<span class="vhdlchar">widthad_a</span> = <span class="vhdllogic">8</span>,
<a name="l00096"></a>00096 <span class="vhdlchar">line_ram_inst</span>.<span class="vhdlchar">width_b</span> = <span class="vhdllogic">36</span>,
<a name="l00097"></a>00097 <span class="vhdlchar">line_ram_inst</span>.<span class="vhdlchar">widthad_b</span> = <span class="vhdllogic">8</span>;
<a name="l00098"></a>00098
<a name="l00099"></a>00099
<a name="l00100"></a><a class="code" href="classdrv__vga.html#a22c0ae2f921e75fcc914231b378a9808">00100</a> <span class="vhdlkeyword">wire</span> <a class="code" href="classdrv__vga.html#a22c0ae2f921e75fcc914231b378a9808">burst_read_prepare</a>;
<a name="l00101"></a>00101 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#a22c0ae2f921e75fcc914231b378a9808">burst_read_prepare</a> = (
<a name="l00102"></a>00102 <span class="keyword">// time to start of next line: 129 + 150 -> enough for ssram write and read</span>
<a name="l00103"></a>00103 <a class="code" href="classdrv__vga.html#a69690878d398577f9f7e595378cda729">h_counter</a> == (<span class="vhdllogic">10'd799</span>-<span class="vhdllogic">10'd129</span>) &&
<a name="l00104"></a>00104 (
<a name="l00105"></a>00105 <a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">v_counter</a> == <span class="vhdllogic">9'd18</span> || <span class="keyword">/* before first line **/</span>
<a name="l00106"></a>00106 (<a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">v_counter</a> != <span class="vhdllogic">9'd498</span> && <a class="code" href="classdrv__vga.html#a9f12b95e1eefddec5a5cffcfb74dedc5">line_counter</a> != <span class="vhdllogic">9'd511</span> && {<a class="code" href="classdrv__vga.html#a9f12b95e1eefddec5a5cffcfb74dedc5">line_counter</a> + <span class="vhdllogic">9'd1</span>} == <a class="code" href="classdrv__vga.html#ac648eff1ad8ac1f5e3e7694d7c29fdba">next_line</a>) <span class="keyword">/* other valid lines, without last line **/</span>
<a name="l00107"></a>00107 )
<a name="l00108"></a>00108 ) ? <span class="vhdllogic">1'b1</span> : <span class="vhdllogic">1'b0</span>;
<a name="l00109"></a>00109
<a name="l00110"></a>00110 <span class="keyword">// 0, 2, 4, 6, 8, 10, 12, 14,</span>
<a name="l00111"></a>00111 <span class="keyword">// 15, 17, 19, 21, 23, 25, 27, 29,</span>
<a name="l00112"></a>00112 <span class="keyword">// 30, 32, 34, 36, 38, 40, 42, 44,</span>
<a name="l00113"></a>00113 <span class="keyword">// 45, ...</span>
<a name="l00114"></a>00114 <span class="keyword">// </span>
<a name="l00115"></a>00115
<a name="l00116"></a><a class="code" href="classdrv__vga.html#ac648eff1ad8ac1f5e3e7694d7c29fdba">00116</a> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">8</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#ac648eff1ad8ac1f5e3e7694d7c29fdba">next_line</a>;
<a name="l00117"></a><a class="code" href="classdrv__vga.html#aa3178dec4eafb3c597849b728bacd928">00117</a> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">2</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#aa3178dec4eafb3c597849b728bacd928">next_counter</a>;
<a name="l00118"></a><a class="code" href="classdrv__vga.html#a6b8dbc4a4fa4c34875a910e793a34e51">00118</a> <span class="vhdlkeyword">always</span> @(<span class="vhdlkeyword">posedge</span> <a class="code" href="classdrv__vga.html#a6400b0e4b90964b25c3f763e19b138d9">clk_30</a> <span class="vhdlkeyword">or</span> <span class="vhdlkeyword">negedge</span> <a class="code" href="classdrv__vga.html#a6ceec01e795fdf21d7a2ccc5b78549ab">reset_n</a>) <span class="vhdlkeyword">begin</span>
<a name="l00119"></a>00119 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#a6ceec01e795fdf21d7a2ccc5b78549ab">reset_n</a> == <span class="vhdllogic">1'b0</span>) <span class="vhdlkeyword">begin</span>
<a name="l00120"></a>00120 <a class="code" href="classdrv__vga.html#aba05385922a89053d0ea07a6543978c1">burst_read_request</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00121"></a>00121 <a class="code" href="classdrv__vga.html#aa909360705ddfb7c3bddc854ddf5245b">burst_read_address</a> <= <span class="vhdllogic">30'd0</span>;
<a name="l00122"></a>00122 <a class="code" href="classdrv__vga.html#a5a908124ef208bf84998f7cde2c452d8">address_a</a> <= <span class="vhdllogic">8'd0</span>;
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <a class="code" href="classdrv__vga.html#ac648eff1ad8ac1f5e3e7694d7c29fdba">next_line</a> <= <span class="vhdllogic">9'd0</span>;
<a name="l00125"></a>00125 <a class="code" href="classdrv__vga.html#aa3178dec4eafb3c597849b728bacd928">next_counter</a> <= <span class="vhdllogic">3'd0</span>;
<a name="l00126"></a>00126 <span class="vhdlkeyword">end</span>
<a name="l00127"></a>00127 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">v_counter</a> == <span class="vhdllogic">9'd0</span>) <span class="vhdlkeyword">begin</span>
<a name="l00128"></a>00128 <a class="code" href="classdrv__vga.html#aa909360705ddfb7c3bddc854ddf5245b">burst_read_address</a> <= <a class="code" href="classdrv__vga.html#aba4ec979e464a3b40494f4d6aef18710">`VGA_VIDEO_BUFFER_DIV_4</a><span class="vhdlchar"></span>; <span class="keyword">// start of video buffer</span>
<a name="l00129"></a>00129 <a class="code" href="classdrv__vga.html#ac648eff1ad8ac1f5e3e7694d7c29fdba">next_line</a> <= <span class="vhdllogic">9'd0</span>;
<a name="l00130"></a>00130 <a class="code" href="classdrv__vga.html#aa3178dec4eafb3c597849b728bacd928">next_counter</a> <= <span class="vhdllogic">3'd0</span>;
<a name="l00131"></a>00131 <span class="vhdlkeyword">end</span>
<a name="l00132"></a>00132 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#a22c0ae2f921e75fcc914231b378a9808">burst_read_prepare</a> == <span class="vhdllogic">1'b1</span>) <span class="vhdlkeyword">begin</span>
<a name="l00133"></a>00133 <a class="code" href="classdrv__vga.html#aba05385922a89053d0ea07a6543978c1">burst_read_request</a> <= <span class="vhdllogic">1'b1</span>;
<a name="l00134"></a>00134 <a class="code" href="classdrv__vga.html#a5a908124ef208bf84998f7cde2c452d8">address_a</a> <= <span class="vhdllogic">8'd0</span>;
<a name="l00135"></a>00135 <span class="vhdlkeyword">end</span>
<a name="l00136"></a>00136 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#a6885e8a9dddd0d46eb48885c1d14104d">burst_read_ready</a> == <span class="vhdllogic">1'b1</span> && <a class="code" href="classdrv__vga.html#a5a908124ef208bf84998f7cde2c452d8">address_a</a> <= <span class="vhdllogic">8'd211</span>) <span class="vhdlkeyword">begin</span>
<a name="l00137"></a>00137 <a class="code" href="classdrv__vga.html#a5a908124ef208bf84998f7cde2c452d8">address_a</a> <= <a class="code" href="classdrv__vga.html#a5a908124ef208bf84998f7cde2c452d8">address_a</a> + <span class="vhdllogic">8'd1</span>;
<a name="l00138"></a>00138 <span class="vhdlkeyword">end</span>
<a name="l00139"></a>00139 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#a6885e8a9dddd0d46eb48885c1d14104d">burst_read_ready</a> == <span class="vhdllogic">1'b1</span> && <a class="code" href="classdrv__vga.html#a5a908124ef208bf84998f7cde2c452d8">address_a</a> == <span class="vhdllogic">8'd212</span>) <span class="vhdlkeyword">begin</span>
<a name="l00140"></a>00140 <a class="code" href="classdrv__vga.html#a5a908124ef208bf84998f7cde2c452d8">address_a</a> <= <a class="code" href="classdrv__vga.html#a5a908124ef208bf84998f7cde2c452d8">address_a</a> + <span class="vhdllogic">8'd1</span>;
<a name="l00141"></a>00141 <a class="code" href="classdrv__vga.html#aba05385922a89053d0ea07a6543978c1">burst_read_request</a> <= <span class="vhdllogic">1'b0</span>;
<a name="l00142"></a>00142 <a class="code" href="classdrv__vga.html#aa909360705ddfb7c3bddc854ddf5245b">burst_read_address</a> <= <a class="code" href="classdrv__vga.html#aa909360705ddfb7c3bddc854ddf5245b">burst_read_address</a> + <span class="vhdllogic">30'd216</span>; <span class="keyword">// 640/3 = 213.(3) = 214 +2 for %4 = 0</span>
<a name="l00143"></a>00143
<a name="l00144"></a>00144 <a class="code" href="classdrv__vga.html#aa3178dec4eafb3c597849b728bacd928">next_counter</a> <= <a class="code" href="classdrv__vga.html#aa3178dec4eafb3c597849b728bacd928">next_counter</a> + <span class="vhdllogic">3'd1</span>;
<a name="l00145"></a>00145
<a name="l00146"></a>00146 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#aa3178dec4eafb3c597849b728bacd928">next_counter</a> == <span class="vhdllogic">3'd7</span>) <a class="code" href="classdrv__vga.html#ac648eff1ad8ac1f5e3e7694d7c29fdba">next_line</a> <= <a class="code" href="classdrv__vga.html#ac648eff1ad8ac1f5e3e7694d7c29fdba">next_line</a> + <span class="vhdllogic">9'd1</span>;
<a name="l00147"></a>00147 <span class="vhdlkeyword">else</span> <a class="code" href="classdrv__vga.html#ac648eff1ad8ac1f5e3e7694d7c29fdba">next_line</a> <= <a class="code" href="classdrv__vga.html#ac648eff1ad8ac1f5e3e7694d7c29fdba">next_line</a> + <span class="vhdllogic">9'd2</span>;
<a name="l00148"></a>00148 <span class="vhdlkeyword">end</span>
<a name="l00149"></a>00149 <span class="vhdlkeyword">end</span>
<a name="l00150"></a>00150
<a name="l00151"></a><a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">00151</a> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">1</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a>;
<a name="l00152"></a><a class="code" href="classdrv__vga.html#af98d92d9fb604c7a3090d1dfebb4325b">00152</a> <span class="vhdlkeyword">always</span> @(<span class="vhdlkeyword">posedge</span> <a class="code" href="classdrv__vga.html#a6400b0e4b90964b25c3f763e19b138d9">clk_30</a> <span class="vhdlkeyword">or</span> <span class="vhdlkeyword">negedge</span> <a class="code" href="classdrv__vga.html#a6ceec01e795fdf21d7a2ccc5b78549ab">reset_n</a>) <span class="vhdlkeyword">begin</span>
<a name="l00153"></a>00153 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#a6ceec01e795fdf21d7a2ccc5b78549ab">reset_n</a> == <span class="vhdllogic">1'b0</span>) <span class="vhdlkeyword">begin</span>
<a name="l00154"></a>00154 <a class="code" href="classdrv__vga.html#abada63beb55063be05d88df41af318fa">address_b</a> <= <span class="vhdllogic">8'd0</span>;
<a name="l00155"></a>00155 <a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> <= <span class="vhdllogic">2'd0</span>;
<a name="l00156"></a>00156 <span class="vhdlkeyword">end</span>
<a name="l00157"></a>00157 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#ad3b09207753c04efb6a28109361c0848">display_valid</a> == <span class="vhdllogic">1'b0</span>) <span class="vhdlkeyword">begin</span>
<a name="l00158"></a>00158 <a class="code" href="classdrv__vga.html#abada63beb55063be05d88df41af318fa">address_b</a> <= <span class="vhdllogic">8'd0</span>;
<a name="l00159"></a>00159 <a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> <= <span class="vhdllogic">2'd1</span>;
<a name="l00160"></a>00160 <span class="vhdlkeyword">end</span>
<a name="l00161"></a>00161 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> == <span class="vhdllogic">2'd1</span>) <span class="vhdlkeyword">begin</span>
<a name="l00162"></a>00162 <a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> <= <a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> + <span class="vhdllogic">2'd1</span>;
<a name="l00163"></a>00163 <span class="vhdlkeyword">end</span>
<a name="l00164"></a>00164 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> == <span class="vhdllogic">2'd2</span>) <span class="vhdlkeyword">begin</span>
<a name="l00165"></a>00165 <a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> <= <a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> + <span class="vhdllogic">2'd1</span>;
<a name="l00166"></a>00166 <a class="code" href="classdrv__vga.html#abada63beb55063be05d88df41af318fa">address_b</a> <= <a class="code" href="classdrv__vga.html#abada63beb55063be05d88df41af318fa">address_b</a> + <span class="vhdllogic">8'd1</span>;
<a name="l00167"></a>00167 <span class="vhdlkeyword">end</span>
<a name="l00168"></a>00168 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> == <span class="vhdllogic">2'd3</span>) <span class="vhdlkeyword">begin</span>
<a name="l00169"></a>00169 <a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> <= <span class="vhdllogic">2'd1</span>;
<a name="l00170"></a>00170 <span class="vhdlkeyword">end</span>
<a name="l00171"></a>00171 <span class="vhdlkeyword">end</span>
<a name="l00172"></a>00172
<a name="l00173"></a><a class="code" href="classdrv__vga.html#a549d46b8e788387828d20c8079bd43b9">00173</a> <span class="vhdlkeyword">wire</span> [<span class="vhdllogic">9</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#a549d46b8e788387828d20c8079bd43b9">red</a> =
<a name="l00174"></a>00174 (<a class="code" href="classdrv__vga.html#a7c72d1d36e519c384a173325a101c738">management_mode</a> == <span class="vhdllogic">1'b1</span> && <a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> == <span class="vhdllogic">2'd1</span>)? { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">31</span>:<span class="vhdllogic">29</span>], <span class="vhdllogic">7'b0</span> } :
<a name="l00175"></a>00175 (<a class="code" href="classdrv__vga.html#a7c72d1d36e519c384a173325a101c738">management_mode</a> == <span class="vhdllogic">1'b1</span> && <a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> == <span class="vhdllogic">2'd1</span>)? { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">22</span>:<span class="vhdllogic">20</span>], <span class="vhdllogic">7'b0</span> } :
<a name="l00176"></a>00176 (<a class="code" href="classdrv__vga.html#a7c72d1d36e519c384a173325a101c738">management_mode</a> == <span class="vhdllogic">1'b1</span>)? { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">13</span>:<span class="vhdllogic">11</span>], <span class="vhdllogic">7'b0</span> } :
<a name="l00177"></a>00177 (<a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> == <span class="vhdllogic">2'd1</span>) ? { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">35</span>:<span class="vhdllogic">32</span>], <span class="vhdllogic">6'b0</span> } :
<a name="l00178"></a>00178 (<a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> == <span class="vhdllogic">2'd2</span>) ? { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">23</span>:<span class="vhdllogic">20</span>], <span class="vhdllogic">6'b0</span> } :
<a name="l00179"></a>00179 { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">11</span>:<span class="vhdllogic">8</span>], <span class="vhdllogic">6'b0</span> };
<a name="l00180"></a>00180
<a name="l00181"></a><a class="code" href="classdrv__vga.html#ad523316de7108ba00362b2a092bd0d10">00181</a> <span class="vhdlkeyword">wire</span> [<span class="vhdllogic">9</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#ad523316de7108ba00362b2a092bd0d10">green</a> =
<a name="l00182"></a>00182 (<a class="code" href="classdrv__vga.html#a7c72d1d36e519c384a173325a101c738">management_mode</a> == <span class="vhdllogic">1'b1</span> && <a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> == <span class="vhdllogic">2'd1</span>)? { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">28</span>:<span class="vhdllogic">26</span>], <span class="vhdllogic">7'b0</span> } :
<a name="l00183"></a>00183 (<a class="code" href="classdrv__vga.html#a7c72d1d36e519c384a173325a101c738">management_mode</a> == <span class="vhdllogic">1'b1</span> && <a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> == <span class="vhdllogic">2'd1</span>)? { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">19</span>:<span class="vhdllogic">17</span>], <span class="vhdllogic">7'b0</span> } :
<a name="l00184"></a>00184 (<a class="code" href="classdrv__vga.html#a7c72d1d36e519c384a173325a101c738">management_mode</a> == <span class="vhdllogic">1'b1</span>)? { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">10</span>:<span class="vhdllogic">8</span>], <span class="vhdllogic">7'b0</span> } :
<a name="l00185"></a>00185 (<a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> == <span class="vhdllogic">2'd1</span>) ? { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">31</span>:<span class="vhdllogic">28</span>], <span class="vhdllogic">6'b0</span> } :
<a name="l00186"></a>00186 (<a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> == <span class="vhdllogic">2'd2</span>) ? { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">19</span>:<span class="vhdllogic">16</span>], <span class="vhdllogic">6'b0</span> } :
<a name="l00187"></a>00187 { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">7</span>:<span class="vhdllogic">4</span>], <span class="vhdllogic">6'b0</span> };
<a name="l00188"></a>00188
<a name="l00189"></a><a class="code" href="classdrv__vga.html#a6eb02b3146858fd49f014815679eaa8d">00189</a> <span class="vhdlkeyword">wire</span> [<span class="vhdllogic">9</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#a6eb02b3146858fd49f014815679eaa8d">blue</a> =
<a name="l00190"></a>00190 (<a class="code" href="classdrv__vga.html#a7c72d1d36e519c384a173325a101c738">management_mode</a> == <span class="vhdllogic">1'b1</span> && <a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> == <span class="vhdllogic">2'd1</span>)? { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">25</span>:<span class="vhdllogic">23</span>], <span class="vhdllogic">7'b0</span> } :
<a name="l00191"></a>00191 (<a class="code" href="classdrv__vga.html#a7c72d1d36e519c384a173325a101c738">management_mode</a> == <span class="vhdllogic">1'b1</span> && <a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> == <span class="vhdllogic">2'd1</span>)? { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">16</span>:<span class="vhdllogic">14</span>], <span class="vhdllogic">7'b0</span> } :
<a name="l00192"></a>00192 (<a class="code" href="classdrv__vga.html#a7c72d1d36e519c384a173325a101c738">management_mode</a> == <span class="vhdllogic">1'b1</span>)? { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">7</span>:<span class="vhdllogic">5</span>], <span class="vhdllogic">7'b0</span> } :
<a name="l00193"></a>00193 (<a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> == <span class="vhdllogic">2'd1</span>) ? { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">27</span>:<span class="vhdllogic">24</span>], <span class="vhdllogic">6'b0</span> } :
<a name="l00194"></a>00194 (<a class="code" href="classdrv__vga.html#a6a5fd8de78bc8bb1bd1431cd860abdf1">three_counter</a> == <span class="vhdllogic">2'd2</span>) ? { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">15</span>:<span class="vhdllogic">12</span>], <span class="vhdllogic">6'b0</span> } :
<a name="l00195"></a>00195 { <a class="code" href="classdrv__vga.html#a30f9820bf1b8cc08e21fa0d7f3a18c6c">q_b</a>[<span class="vhdllogic">3</span>:<span class="vhdllogic">0</span>], <span class="vhdllogic">6'b0</span> };
<a name="l00196"></a>00196
<a name="l00197"></a>00197 <span class="keyword">//------------------------------------------------------------------------------ on screen display: 24 columns, 18 lines start</span>
<a name="l00198"></a><a class="code" href="classdrv__vga.html#a0bee1fc166ab279e572fe1fe707e3b67">00198</a> <span class="vhdlkeyword">wire</span> [<span class="vhdllogic">8</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#a0bee1fc166ab279e572fe1fe707e3b67">line_counter_for_osd</a>;
<a name="l00199"></a>00199 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#a0bee1fc166ab279e572fe1fe707e3b67">line_counter_for_osd</a> = <a class="code" href="classdrv__vga.html#a9f12b95e1eefddec5a5cffcfb74dedc5">line_counter</a> - <span class="vhdllogic">9'd176</span>;
<a name="l00200"></a><a class="code" href="classdrv__vga.html#a4290316a2168f5ff072defe602b7287f">00200</a> <span class="vhdlkeyword">wire</span> [<span class="vhdllogic">10</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#a4290316a2168f5ff072defe602b7287f">column_counter_for_osd</a>;
<a name="l00201"></a>00201 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#a4290316a2168f5ff072defe602b7287f">column_counter_for_osd</a> = <a class="code" href="classdrv__vga.html#aa7e8f2c6185b5ee9f8a11def2f04e192">column_counter</a> - <span class="vhdllogic">11'd8</span>;
<a name="l00202"></a>00202
<a name="l00203"></a>00203 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#a10a45704e7923788c0d10c21c623ac4f">osd_line</a> = (<a class="code" href="classdrv__vga.html#a9f12b95e1eefddec5a5cffcfb74dedc5">line_counter</a> >= <span class="vhdllogic">9'd176</span> <span class="keyword">/* 480-16-16x18 **/</span> && <a class="code" href="classdrv__vga.html#a9f12b95e1eefddec5a5cffcfb74dedc5">line_counter</a> < <span class="vhdllogic">9'd464</span> <span class="keyword">/* 480-16**/</span>)? <a class="code" href="classdrv__vga.html#a0bee1fc166ab279e572fe1fe707e3b67">line_counter_for_osd</a>[<span class="vhdllogic">8</span>:<span class="vhdllogic">4</span>] : <span class="vhdllogic">5'd31</span>;
<a name="l00204"></a>00204 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#aa1cc640088b50fda8dd9a874d1abd909">osd_column</a> = (<a class="code" href="classdrv__vga.html#aa7e8f2c6185b5ee9f8a11def2f04e192">column_counter</a> >= <span class="vhdllogic">11'd8</span> && <a class="code" href="classdrv__vga.html#aa7e8f2c6185b5ee9f8a11def2f04e192">column_counter</a> < <span class="vhdllogic">11'd200</span> <span class="keyword">/* 8+24x8 **/</span>)? <a class="code" href="classdrv__vga.html#a4290316a2168f5ff072defe602b7287f">column_counter_for_osd</a>[<span class="vhdllogic">7</span>:<span class="vhdllogic">3</span>]: <span class="vhdllogic">5'd31</span>;
<a name="l00205"></a>00205
<a name="l00206"></a><a class="code" href="classdrv__vga.html#af55ae5aff822796b9173fcaf7c6b19ea">00206</a> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">7</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#af55ae5aff822796b9173fcaf7c6b19ea">char_saved</a>;
<a name="l00207"></a><a class="code" href="classdrv__vga.html#a0cd5229f9236bafdc60cd75f2836d688">00207</a> <span class="vhdlkeyword">always</span> @(<span class="vhdlkeyword">posedge</span> <a class="code" href="classdrv__vga.html#a6400b0e4b90964b25c3f763e19b138d9">clk_30</a> <span class="vhdlkeyword">or</span> <span class="vhdlkeyword">negedge</span> <a class="code" href="classdrv__vga.html#a6ceec01e795fdf21d7a2ccc5b78549ab">reset_n</a>) <span class="vhdlkeyword">begin</span>
<a name="l00208"></a>00208 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#a6ceec01e795fdf21d7a2ccc5b78549ab">reset_n</a> == <span class="vhdllogic">1'b0</span>) <a class="code" href="classdrv__vga.html#af55ae5aff822796b9173fcaf7c6b19ea">char_saved</a> <= <span class="vhdllogic">8'd0</span>;
<a name="l00209"></a>00209 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#a4290316a2168f5ff072defe602b7287f">column_counter_for_osd</a>[<span class="vhdllogic">2</span>:<span class="vhdllogic">0</span>] == <span class="vhdllogic">3'd6</span>) <a class="code" href="classdrv__vga.html#af55ae5aff822796b9173fcaf7c6b19ea">char_saved</a> <= <a class="code" href="classdrv__vga.html#a38feb3e41812bbabd4d64c418a6fb622">character</a>;
<a name="l00210"></a>00210 <span class="vhdlkeyword">end</span>
<a name="l00211"></a>00211
<a name="l00212"></a>00212 <span class="keyword">//****************** Font</span>
<a name="l00213"></a><a class="code" href="classdrv__vga.html#a0ec503813e34949f7668a98f504761a0">00213</a> <span class="vhdlkeyword">wire</span> [<span class="vhdllogic">8</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#a0ec503813e34949f7668a98f504761a0">font_line</a>;
<a name="l00214"></a>00214 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#a0ec503813e34949f7668a98f504761a0">font_line</a> = <a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">v_counter</a> - <span class="vhdllogic">9'd3</span>;
<a name="l00215"></a>00215
<a name="l00216"></a><a class="code" href="classdrv__vga.html#ae5d246022a400014c7a17bbcd0398db6">00216</a> <span class="vhdlkeyword">wire</span> [<span class="vhdllogic">9</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#ae5d246022a400014c7a17bbcd0398db6">font_column</a>;
<a name="l00217"></a>00217 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#ae5d246022a400014c7a17bbcd0398db6">font_column</a> = <a class="code" href="classdrv__vga.html#a69690878d398577f9f7e595378cda729">h_counter</a> - <span class="vhdllogic">10'd6</span>;
<a name="l00218"></a>00218
<a name="l00219"></a><a class="code" href="classdrv__vga.html#a8f0863b6b9622cfa812f1d53ea373b2b">00219</a> <span class="vhdlkeyword">wire</span> [<span class="vhdllogic">7</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#a8f0863b6b9622cfa812f1d53ea373b2b">font</a>;
<a name="l00220"></a><a class="code" href="classdrv__vga.html#a73ed539019cb91cac1dba5720b142a01">00220</a> <a class="code" href="classdrv__vga.html#a73ed539019cb91cac1dba5720b142a01">altsyncram</a> <span class="vhdlchar">font_rom_inst</span>(
<a name="l00221"></a>00221 .<span class="vhdlchar">clock0</span>(<a class="code" href="classdrv__vga.html#a6400b0e4b90964b25c3f763e19b138d9">clk_30</a>),
<a name="l00222"></a>00222 .<a class="code" href="classdrv__vga.html#a5a908124ef208bf84998f7cde2c452d8">address_a</a>({<a class="code" href="classdrv__vga.html#af55ae5aff822796b9173fcaf7c6b19ea">char_saved</a>[<span class="vhdllogic">6</span>:<span class="vhdllogic">0</span>], <a class="code" href="classdrv__vga.html#a0ec503813e34949f7668a98f504761a0">font_line</a>[<span class="vhdllogic">3</span>:<span class="vhdllogic">0</span>]}),
<a name="l00223"></a>00223 .<span class="vhdlchar">q_a</span>(<a class="code" href="classdrv__vga.html#a8f0863b6b9622cfa812f1d53ea373b2b">font</a>)
<a name="l00224"></a>00224 );
<a name="l00225"></a>00225 <span class="vhdlkeyword">defparam</span> <span class="vhdlchar">font_rom_inst</span>.<span class="vhdlchar">operation_mode</span> = <span class="keyword">"ROM"</span>;
<a name="l00226"></a>00226 <span class="vhdlkeyword">defparam</span> <span class="vhdlchar">font_rom_inst</span>.<span class="vhdlchar">width_a</span> = <span class="vhdllogic">8</span>;
<a name="l00227"></a>00227 <span class="vhdlkeyword">defparam</span> <span class="vhdlchar">font_rom_inst</span>.<span class="vhdlchar">widthad_a</span> = <span class="vhdllogic">11</span>;
<a name="l00228"></a>00228 <span class="vhdlkeyword">defparam</span> <span class="vhdlchar">font_rom_inst</span>.<span class="vhdlchar">init_file</span> = <span class="keyword">"drv_vga_font.mif"</span>;
<a name="l00229"></a>00229
<a name="l00230"></a><a class="code" href="classdrv__vga.html#a6b8ee2d70db3b00e0bd08671cd13b52d">00230</a> <span class="vhdlkeyword">wire</span> <a class="code" href="classdrv__vga.html#a6b8ee2d70db3b00e0bd08671cd13b52d">font_pixel</a>;
<a name="l00231"></a>00231 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#a6b8ee2d70db3b00e0bd08671cd13b52d">font_pixel</a> = <a class="code" href="classdrv__vga.html#af55ae5aff822796b9173fcaf7c6b19ea">char_saved</a>[<span class="vhdllogic">7</span>] ^ <a class="code" href="classdrv__vga.html#a8f0863b6b9622cfa812f1d53ea373b2b">font</a>[<a class="code" href="classdrv__vga.html#ae5d246022a400014c7a17bbcd0398db6">font_column</a>[<span class="vhdllogic">2</span>:<span class="vhdllogic">0</span>]];
<a name="l00232"></a>00232
<a name="l00233"></a><a class="code" href="classdrv__vga.html#a1b5b5b35ae3fdd5eb40af9286ad6dc44">00233</a> <span class="vhdlkeyword">wire</span> <a class="code" href="classdrv__vga.html#a1b5b5b35ae3fdd5eb40af9286ad6dc44">osd_active</a>;
<a name="l00234"></a>00234 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#a1b5b5b35ae3fdd5eb40af9286ad6dc44">osd_active</a> = (<a class="code" href="classdrv__vga.html#ab7f595d93fa3723c61f056ad13e4b95b">on_screen_display</a> == <span class="vhdllogic">1'b1</span> && <a class="code" href="classdrv__vga.html#a10a45704e7923788c0d10c21c623ac4f">osd_line</a> != <span class="vhdllogic">5'd31</span> && <a class="code" href="classdrv__vga.html#aa1cc640088b50fda8dd9a874d1abd909">osd_column</a> != <span class="vhdllogic">5'd31</span>);
<a name="l00235"></a>00235 <span class="keyword">//------------------------------------------------------------------------------ on screen display end</span>
<a name="l00236"></a>00236
<a name="l00237"></a>00237 <span class="keyword">// 640x480@75Hz</span>
<a name="l00238"></a><a class="code" href="classdrv__vga.html#a69690878d398577f9f7e595378cda729">00238</a> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">9</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#a69690878d398577f9f7e595378cda729">h_counter</a>;
<a name="l00239"></a><a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">00239</a> <span class="vhdlkeyword">reg</span> [<span class="vhdllogic">8</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">v_counter</a>;
<a name="l00240"></a><a class="code" href="classdrv__vga.html#af0c7c40cb7c77b8c759687d6362a7e17">00240</a> <span class="vhdlkeyword">always</span> @(<span class="vhdlkeyword">posedge</span> <a class="code" href="classdrv__vga.html#a6400b0e4b90964b25c3f763e19b138d9">clk_30</a> <span class="vhdlkeyword">or</span> <span class="vhdlkeyword">negedge</span> <a class="code" href="classdrv__vga.html#a6ceec01e795fdf21d7a2ccc5b78549ab">reset_n</a>) <span class="vhdlkeyword">begin</span>
<a name="l00241"></a>00241 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#a6ceec01e795fdf21d7a2ccc5b78549ab">reset_n</a> == <span class="vhdllogic">1'b0</span>) <span class="vhdlkeyword">begin</span>
<a name="l00242"></a>00242 <a class="code" href="classdrv__vga.html#a69690878d398577f9f7e595378cda729">h_counter</a> <= <span class="vhdllogic">10'd0</span>;
<a name="l00243"></a>00243 <a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">v_counter</a> <= <span class="vhdllogic">9'd0</span>;
<a name="l00244"></a>00244 <span class="vhdlkeyword">end</span>
<a name="l00245"></a>00245 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#a69690878d398577f9f7e595378cda729">h_counter</a> == <span class="vhdllogic">10'd799</span>) <span class="vhdlkeyword">begin</span>
<a name="l00246"></a>00246 <a class="code" href="classdrv__vga.html#a69690878d398577f9f7e595378cda729">h_counter</a> <= <span class="vhdllogic">10'd0</span>;
<a name="l00247"></a>00247
<a name="l00248"></a>00248 <span class="vhdlkeyword">if</span>(<a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">v_counter</a> == <span class="vhdllogic">9'd499</span>) <a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">v_counter</a> <= <span class="vhdllogic">9'd0</span>;
<a name="l00249"></a>00249 <span class="vhdlkeyword">else</span> <a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">v_counter</a> <= <a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">v_counter</a> + <span class="vhdllogic">9'd1</span>;
<a name="l00250"></a>00250 <span class="vhdlkeyword">end</span>
<a name="l00251"></a>00251 <span class="vhdlkeyword">else</span> <span class="vhdlkeyword">begin</span>
<a name="l00252"></a>00252 <a class="code" href="classdrv__vga.html#a69690878d398577f9f7e595378cda729">h_counter</a> <= <a class="code" href="classdrv__vga.html#a69690878d398577f9f7e595378cda729">h_counter</a> + <span class="vhdllogic">10'd1</span>;
<a name="l00253"></a>00253 <span class="vhdlkeyword">end</span>
<a name="l00254"></a>00254 <span class="vhdlkeyword">end</span>
<a name="l00255"></a>00255
<a name="l00256"></a>00256 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#abb6a6625a5d411c83df0b1d3afa35a7a">vga_hsync</a> = (<a class="code" href="classdrv__vga.html#a69690878d398577f9f7e595378cda729">h_counter</a> >= <span class="vhdllogic">10'd0</span> && <a class="code" href="classdrv__vga.html#a69690878d398577f9f7e595378cda729">h_counter</a> <= <span class="vhdllogic">10'd63</span>) ? <span class="vhdllogic">1'b0</span> : <span class="vhdllogic">1'b1</span>;
<a name="l00257"></a>00257 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#a362ab6edf9ff37ff6f51f8c7c42a0ebf">vga_vsync</a> = (<a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">v_counter</a> >= <span class="vhdllogic">9'd0</span> && <a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">v_counter</a> <= <span class="vhdllogic">9'd2</span>) ? <span class="vhdllogic">1'b0</span> : <span class="vhdllogic">1'b1</span>;
<a name="l00258"></a>00258
<a name="l00259"></a><a class="code" href="classdrv__vga.html#a9f12b95e1eefddec5a5cffcfb74dedc5">00259</a> <span class="vhdlkeyword">wire</span> [<span class="vhdllogic">8</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#a9f12b95e1eefddec5a5cffcfb74dedc5">line_counter</a>;
<a name="l00260"></a>00260 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#a9f12b95e1eefddec5a5cffcfb74dedc5">line_counter</a> = (<a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">v_counter</a> >= <span class="vhdllogic">9'd19</span> && <a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">v_counter</a> <= <span class="vhdllogic">9'd498</span>)? <a class="code" href="classdrv__vga.html#a41db336402ed59e650d7287f89e93120">v_counter</a> - <span class="vhdllogic">9'd19</span> : <span class="vhdllogic">9'd511</span>;
<a name="l00261"></a>00261
<a name="l00262"></a><a class="code" href="classdrv__vga.html#aa7e8f2c6185b5ee9f8a11def2f04e192">00262</a> <span class="vhdlkeyword">wire</span> [<span class="vhdllogic">10</span>:<span class="vhdllogic">0</span>] <a class="code" href="classdrv__vga.html#aa7e8f2c6185b5ee9f8a11def2f04e192">column_counter</a>;
<a name="l00263"></a>00263 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#aa7e8f2c6185b5ee9f8a11def2f04e192">column_counter</a> = (<a class="code" href="classdrv__vga.html#a69690878d398577f9f7e595378cda729">h_counter</a> >= <span class="vhdllogic">10'd150</span> && <a class="code" href="classdrv__vga.html#a69690878d398577f9f7e595378cda729">h_counter</a> <= <span class="vhdllogic">10'd789</span>)? <a class="code" href="classdrv__vga.html#a69690878d398577f9f7e595378cda729">h_counter</a> - <span class="vhdllogic">10'd150</span> : <span class="vhdllogic">10'd1023</span>;
<a name="l00264"></a>00264
<a name="l00265"></a>00265 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#ad3b09207753c04efb6a28109361c0848">display_valid</a> = (<a class="code" href="classdrv__vga.html#a9f12b95e1eefddec5a5cffcfb74dedc5">line_counter</a> != <span class="vhdllogic">9'd511</span> && <a class="code" href="classdrv__vga.html#aa7e8f2c6185b5ee9f8a11def2f04e192">column_counter</a> != <span class="vhdllogic">10'd1023</span>);
<a name="l00266"></a>00266
<a name="l00267"></a>00267 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#ae093cf39ab1b80814194c6eb1ab39c2f">vga_r</a> = <a class="code" href="classdrv__vga.html#ad3b09207753c04efb6a28109361c0848">display_valid</a> ? ((<a class="code" href="classdrv__vga.html#a1b5b5b35ae3fdd5eb40af9286ad6dc44">osd_active</a> == <span class="vhdllogic">1'b0</span>) ? <a class="code" href="classdrv__vga.html#a549d46b8e788387828d20c8079bd43b9">red</a> : {<span class="vhdllogic">10</span>{<a class="code" href="classdrv__vga.html#a6b8ee2d70db3b00e0bd08671cd13b52d">font_pixel</a>}}) : <span class="vhdllogic">10'd0</span>;
<a name="l00268"></a>00268 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#af4d7be7b44d78e0185b57899db4649d2">vga_g</a> = <a class="code" href="classdrv__vga.html#ad3b09207753c04efb6a28109361c0848">display_valid</a> ? ((<a class="code" href="classdrv__vga.html#a1b5b5b35ae3fdd5eb40af9286ad6dc44">osd_active</a> == <span class="vhdllogic">1'b0</span>) ? <a class="code" href="classdrv__vga.html#ad523316de7108ba00362b2a092bd0d10">green</a> : {<span class="vhdllogic">10</span>{<a class="code" href="classdrv__vga.html#a6b8ee2d70db3b00e0bd08671cd13b52d">font_pixel</a>}}) : <span class="vhdllogic">10'd0</span>;
<a name="l00269"></a>00269 <span class="vhdlkeyword">assign</span> <a class="code" href="classdrv__vga.html#acd92e53e6d10225e6d4aa1cc962be209">vga_b</a> = <a class="code" href="classdrv__vga.html#ad3b09207753c04efb6a28109361c0848">display_valid</a> ? ((<a class="code" href="classdrv__vga.html#a1b5b5b35ae3fdd5eb40af9286ad6dc44">osd_active</a> == <span class="vhdllogic">1'b0</span>) ? <a class="code" href="classdrv__vga.html#a6eb02b3146858fd49f014815679eaa8d">blue</a> : {<span class="vhdllogic">10</span>{<a class="code" href="classdrv__vga.html#a6b8ee2d70db3b00e0bd08671cd13b52d">font_pixel</a>}}) : <span class="vhdllogic">10'd0</span>;
<a name="l00270"></a>00270
<a name="l00271"></a>00271 <span class="vhdlkeyword">endmodule</span>
<a name="l00272"></a>00272
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