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<div class="title">E:/uart_block/hdl/iseProject/testBaud_generator.vhd</div>  </div>
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113 
<div class="contents">
114 
<a href="test_baud__generator_8vhd.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001
115 
<a name="l00003"></a>00003
116 
<a name="l00005"></a>00005 <span class="vhdlkeyword">library </span><span class="keywordflow">ieee</span>;
117 
<a name="l00006"></a>00006 <span class="vhdlkeyword">use </span>ieee.std_logic_1164.<span class="vhdlkeyword">all</span>;
118 
<a name="l00007"></a>00007 <span class="vhdlkeyword">use </span>ieee.std_logic_unsigned.<span class="vhdlkeyword">all</span>;
119 
<a name="l00008"></a>00008 <span class="vhdlkeyword">use </span>ieee.std_logic_arith.<span class="vhdlkeyword">all</span>;
120 
<a name="l00009"></a>00009
121 
<a name="l00011"></a><a class="code" href="classtest_baud__generator.html#ac442dca664056131bdaf5c92e4351e01">00011</a> <span class="vhdlkeyword">use </span>work.pkgDefinitions.<span class="vhdlkeyword">all</span>;
122 
<a name="l00012"></a>00012
123 
<a name="l00013"></a><a class="code" href="classtest_baud__generator.html">00013</a> <span class="keywordflow">ENTITY </span><a class="code" href="classtest_baud__generator.html">testBaud_generator</a> <span class="vhdlkeyword">IS</span>
124 
<a name="l00014"></a>00014 <span class="vhdlkeyword">END</span> <span class="vhdlchar">testBaud_generator</span>;
125 
<a name="l00015"></a>00015
126 
<a name="l00018"></a><a class="code" href="classtest_baud__generator_1_1behavior.html">00018</a> <span class="vhdlkeyword">ARCHITECTURE</span> behavior <span class="vhdlkeyword">OF</span> <a class="code" href="classtest_baud__generator.html">testBaud_generator</a> IS
127 
<a name="l00019"></a>00019
128 
<a name="l00020"></a><a class="code" href="classtest_baud__generator_1_1behavior.html#a28592cfd89ceaf4e659c0f51beddd258">00020</a>     <span class="vhdlkeyword">COMPONENT</span> <a class="code" href="classbaud__generator.html">baud_generator</a>
129 
<a name="l00021"></a>00021     <span class="vhdlkeyword">Port</span> ( <a class="code" href="classbaud__generator.html#ab6aed4f6f0ae3df108d9e29e513e3ad2" title="Reset Input.">rst</a> : <span class="vhdlkeyword">in</span> <span class="comment">STD_LOGIC</span>;
130 
<a name="l00022"></a>00022                           <a class="code" href="classbaud__generator.html#a86b40337b1eabc8f0e5ef6f0747d0048" title="Clock input.">clk</a> : <span class="vhdlkeyword">in</span>  <span class="comment">STD_LOGIC</span>;
131 
<a name="l00023"></a>00023            <a class="code" href="classbaud__generator.html#afa554c45fd56e5060cc076e2edf0db7a" title="Number of cycles to wait for baud generation.">cycle_wait</a> : <span class="vhdlkeyword">in</span>  <span class="comment">STD_LOGIC_VECTOR</span> ((nBitsLarge<span class="vhdlchar">-</span><span class="vhdllogic"></span><span class="vhdllogic">1</span>) <span class="vhdlkeyword">downto</span> <span class="vhdllogic"></span><span class="vhdllogic">0</span>);
132 
<a name="l00024"></a>00024                           <a class="code" href="classbaud__generator.html#ac451ec554e394c65d78e94f9aa1a2365" title="Oversample(8x) version of baud (Used on serial_receiver)">baud_oversample</a> : <span class="vhdlkeyword">out</span> <span class="comment">std_logic</span>;
133 
<a name="l00025"></a>00025            <a class="code" href="classbaud__generator.html#ab3c0013cf4a2db5d1f3473d97bda35a4" title="Baud generation output (Used on serial_transmitter)">baud</a> : <span class="vhdlkeyword">out</span>  <span class="comment">STD_LOGIC</span>);
134 
<a name="l00026"></a>00026     <span class="vhdlkeyword">END</span> <span class="vhdlkeyword">COMPONENT</span>;
135 
<a name="l00027"></a>00027
136 
<a name="l00028"></a>00028 <span class="keyword"></span>
137 
<a name="l00029"></a>00029 <span class="keyword">   --Inputs</span>
138 
<a name="l00030"></a><a class="code" href="classtest_baud__generator_1_1behavior.html#a4ad19b09fd701414daa953d2e84cb994">00030</a>    <span class="vhdlkeyword">signal</span> <span class="vhdlchar"><a class="code" href="classtest_baud__generator_1_1behavior.html#a4ad19b09fd701414daa953d2e84cb994" title="Signal to connect with UUT.">rst</a></span> <span class="vhdlchar">:</span> <span class="comment">std_logic</span> <span class="vhdlchar">:=</span> <span class="vhdlchar">&#39;</span><span class="vhdllogic"></span><span class="vhdllogic">0</span><span class="vhdlchar">&#39;</span>;
139 
<a name="l00031"></a><a class="code" href="classtest_baud__generator_1_1behavior.html#aefbce29afe42d366da5d2568c651a848">00031</a>    <span class="vhdlkeyword">signal</span> <span class="vhdlchar"><a class="code" href="classtest_baud__generator_1_1behavior.html#aefbce29afe42d366da5d2568c651a848" title="Signal to connect with UUT.">clk</a></span> <span class="vhdlchar">:</span> <span class="comment">std_logic</span> <span class="vhdlchar">:=</span> <span class="vhdlchar">&#39;</span><span class="vhdllogic"></span><span class="vhdllogic">0</span><span class="vhdlchar">&#39;</span>;
140 
<a name="l00032"></a><a class="code" href="classtest_baud__generator_1_1behavior.html#a24127a443faf9414dd7ce6d1c04a77a3">00032</a>    <span class="vhdlkeyword">signal</span> <span class="vhdlchar"><a class="code" href="classtest_baud__generator_1_1behavior.html#a24127a443faf9414dd7ce6d1c04a77a3" title="Signal to connect with UUT.">cycle_wait</a></span> <span class="vhdlchar">:</span> <span class="comment">std_logic_vector</span><span class="vhdlchar">(</span><span class="vhdlchar">(</span><span class="vhdlchar">nBitsLarge</span><span class="vhdlchar">-</span><span class="vhdllogic"></span><span class="vhdllogic">1</span><span class="vhdlchar">)</span> <span class="vhdlkeyword">downto</span> <span class="vhdllogic"></span><span class="vhdllogic">0</span><span class="vhdlchar">)</span> <span class="vhdlchar">:=</span> <span class="vhdlchar">(</span><span class="vhdlkeyword">others</span> <span class="vhdlchar">=</span><span class="vhdlchar">&gt;</span> <span class="vhdlchar">&#39;</span><span class="vhdllogic"></span><span class="vhdllogic">0</span><span class="vhdlchar">&#39;</span><span class="vhdlchar">)</span>;
141 
<a name="l00033"></a>00033 <span class="keyword"></span>
142 
<a name="l00034"></a>00034 <span class="keyword">        --Outputs</span>
143 
<a name="l00035"></a><a class="code" href="classtest_baud__generator_1_1behavior.html#a651731352ede98b937241d8cffe9a407">00035</a>    <span class="vhdlkeyword">signal</span> <span class="vhdlchar"><a class="code" href="classtest_baud__generator_1_1behavior.html#a651731352ede98b937241d8cffe9a407" title="Signal to connect with UUT.">baud</a></span> <span class="vhdlchar">:</span> <span class="comment">std_logic</span>;
144 
<a name="l00036"></a><a class="code" href="classtest_baud__generator_1_1behavior.html#a148b72e3227bca47e0a8cbaec91be764">00036</a>         <span class="vhdlkeyword">signal</span> <span class="vhdlchar"><a class="code" href="classtest_baud__generator_1_1behavior.html#a148b72e3227bca47e0a8cbaec91be764" title="Signal to connect with UUT.">baud_oversample</a></span> <span class="vhdlchar">:</span> <span class="comment">std_logic</span>;
145 
<a name="l00037"></a>00037 <span class="keyword"></span>
146 
<a name="l00038"></a>00038 <span class="keyword">   -- Clock period definitions (</span><span class="vhdllogic">1</span>.8432MHz)
147 
<a name="l00039"></a>00039    <span class="vhdlkeyword">constant</span> <span class="vhdlchar">clk_period</span> <span class="vhdlchar">:</span> <span class="comment">time</span> <span class="vhdlchar">:=</span> <span class="vhdllogic"></span><span class="vhdllogic">20</span> <span class="vhdlchar">ns</span>;<span class="keyword"> -- </span><span class="vhdllogic">0</span>.543us (<span class="vhdllogic">1</span>.8432Mhz) 20ns (50Mhz)
148 
<a name="l00040"></a>00040
149 
<a name="l00041"></a>00041 <span class="vhdlkeyword">BEGIN</span>
150 
<a name="l00042"></a>00042
151 
<a name="l00044"></a>00044    <a class="code" href="dummy.html#a1619316ad715601eb5d3559db829ac05" title="Instantiate the Unit Under Test (UUT)">uut</a>: <a class="code" href="classbaud__generator.html">baud_generator</a> <span class="vhdlkeyword">PORT</span> <span class="vhdlkeyword">MAP</span> (
152 
<a name="l00045"></a>00045           <a class="code" href="classbaud__generator.html#ab6aed4f6f0ae3df108d9e29e513e3ad2" title="Reset Input.">rst</a> =&gt; <a class="code" href="classtest_baud__generator_1_1behavior.html#a4ad19b09fd701414daa953d2e84cb994" title="Signal to connect with UUT.">rst</a>,
153 
<a name="l00046"></a>00046           <a class="code" href="classbaud__generator.html#a86b40337b1eabc8f0e5ef6f0747d0048" title="Clock input.">clk</a> =&gt; <a class="code" href="classtest_baud__generator_1_1behavior.html#aefbce29afe42d366da5d2568c651a848" title="Signal to connect with UUT.">clk</a>,
154 
<a name="l00047"></a>00047           <a class="code" href="classbaud__generator.html#afa554c45fd56e5060cc076e2edf0db7a" title="Number of cycles to wait for baud generation.">cycle_wait</a> =&gt; <a class="code" href="classtest_baud__generator_1_1behavior.html#a24127a443faf9414dd7ce6d1c04a77a3" title="Signal to connect with UUT.">cycle_wait</a>,
155 
<a name="l00048"></a>00048                          <a class="code" href="classbaud__generator.html#ac451ec554e394c65d78e94f9aa1a2365" title="Oversample(8x) version of baud (Used on serial_receiver)">baud_oversample</a> =&gt; <a class="code" href="classtest_baud__generator_1_1behavior.html#a148b72e3227bca47e0a8cbaec91be764" title="Signal to connect with UUT.">baud_oversample</a>,
156 
<a name="l00049"></a>00049           <a class="code" href="classbaud__generator.html#ab3c0013cf4a2db5d1f3473d97bda35a4" title="Baud generation output (Used on serial_transmitter)">baud</a> =&gt; <a class="code" href="classtest_baud__generator_1_1behavior.html#a651731352ede98b937241d8cffe9a407" title="Signal to connect with UUT.">baud</a>
157 
<a name="l00050"></a>00050         <span class="vhdlchar">)</span>;
158 
<a name="l00051"></a>00051 <span class="keyword"></span>
159 
<a name="l00052"></a>00052 <span class="keyword">   -- Clock <span class="vhdlkeyword">process</span> definitions</span>
160 
<a name="l00053"></a>00053    clk_process :<span class="vhdlkeyword">process</span>
161 
<a name="l00054"></a>00054    <span class="vhdlkeyword">begin</span>
162 
<a name="l00055"></a>00055                 <span class="vhdlchar"><a class="code" href="classtest_baud__generator_1_1behavior.html#aefbce29afe42d366da5d2568c651a848" title="Signal to connect with UUT.">clk</a></span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">&#39;</span><span class="vhdllogic"></span><span class="vhdllogic">0</span><span class="vhdlchar">&#39;</span>;
163 
<a name="l00056"></a>00056                 <span class="vhdlkeyword">wait</span> <span class="vhdlkeyword">for</span> <span class="vhdlchar">clk_period</span><span class="vhdlchar">/</span><span class="vhdllogic"></span><span class="vhdllogic">2</span>;
164 
<a name="l00057"></a>00057                 <span class="vhdlchar"><a class="code" href="classtest_baud__generator_1_1behavior.html#aefbce29afe42d366da5d2568c651a848" title="Signal to connect with UUT.">clk</a></span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">&#39;</span><span class="vhdllogic"></span><span class="vhdllogic">1</span><span class="vhdlchar">&#39;</span>;
165 
<a name="l00058"></a>00058                 <span class="vhdlkeyword">wait</span> <span class="vhdlkeyword">for</span> <span class="vhdlchar">clk_period</span><span class="vhdlchar">/</span><span class="vhdllogic"></span><span class="vhdllogic">2</span>;
166 
<a name="l00059"></a>00059    <span class="vhdlkeyword">end</span> <span class="vhdlkeyword">process</span>;
167 
<a name="l00060"></a>00060
168 
<a name="l00061"></a>00061 <span class="keyword"></span>
169 
<a name="l00062"></a>00062 <span class="keyword">   -- Stimulus <span class="vhdlkeyword">process</span></span>
170 
<a name="l00063"></a>00063    stim_proc: <span class="vhdlkeyword">process</span>
171 
<a name="l00064"></a>00064    <span class="vhdlkeyword">variable</span> <span class="vhdlchar">t1</span> <span class="vhdlchar">:</span> <span class="comment">time</span>;
172 
<a name="l00065"></a>00065         <span class="vhdlkeyword">variable</span> <span class="vhdlchar">t2</span> <span class="vhdlchar">:</span> <span class="comment">time</span>;
173 
<a name="l00066"></a>00066         <span class="vhdlkeyword">variable</span> <span class="vhdlchar">period</span> <span class="vhdlchar">:</span> <span class="comment">time</span>;<span class="keyword"> -- 1/115200 = </span><span class="vhdllogic">8</span>.<span class="vhdllogic">68</span> us
174 
<a name="l00067"></a>00067 <span class="vhdlkeyword">        begin</span>           <span class="keyword"></span>
175 
<a name="l00068"></a>00068 <span class="keyword">      -- Test the baud generator waiting <span class="vhdlkeyword">for</span> </span><span class="vhdllogic">434</span> clock cycles from 50MHz clock
176 
<a name="l00069"></a>00069                 <span class="vhdlchar"><a class="code" href="classtest_baud__generator_1_1behavior.html#a4ad19b09fd701414daa953d2e84cb994" title="Signal to connect with UUT.">rst</a></span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">&#39;</span><span class="vhdllogic"></span><span class="vhdllogic">1</span><span class="vhdlchar">&#39;</span>;
177 
<a name="l00070"></a>00070                 <span class="vhdlchar"><a class="code" href="classtest_baud__generator_1_1behavior.html#a24127a443faf9414dd7ce6d1c04a77a3" title="Signal to connect with UUT.">cycle_wait</a></span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">conv_std_logic_vector</span><span class="vhdlchar">(</span><span class="vhdllogic"></span><span class="vhdllogic">434</span><span class="vhdlchar">,</span> <span class="vhdlchar">(</span><span class="vhdlchar">nBitsLarge</span><span class="vhdlchar">)</span><span class="vhdlchar">)</span>;<span class="keyword"> -- 50000000/115200</span>
178 
<a name="l00071"></a>00071       <span class="vhdlkeyword">wait</span> <span class="vhdlkeyword">for</span> <span class="vhdlchar">clk_period</span>;
179 
<a name="l00072"></a>00072                 <span class="vhdlchar"><a class="code" href="classtest_baud__generator_1_1behavior.html#a4ad19b09fd701414daa953d2e84cb994" title="Signal to connect with UUT.">rst</a></span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">&#39;</span><span class="vhdllogic"></span><span class="vhdllogic">0</span><span class="vhdlchar">&#39;</span>;
180 
<a name="l00073"></a>00073
181 
<a name="l00074"></a>00074       <span class="vhdlkeyword">wait</span> <span class="vhdlkeyword">until</span> <span class="vhdlchar"><a class="code" href="classtest_baud__generator_1_1behavior.html#a651731352ede98b937241d8cffe9a407" title="Signal to connect with UUT.">baud</a></span> <span class="vhdlchar">=</span> <span class="vhdlchar">&#39;</span><span class="vhdllogic"></span><span class="vhdllogic">1</span><span class="vhdlchar">&#39;</span>;
182 
<a name="l00075"></a>00075                 <span class="vhdlchar">t1</span> <span class="vhdlchar">:=</span> <span class="vhdlchar">now</span>;<span class="keyword">      -- Get current simulation <span class="comment">time</span></span>
183 
<a name="l00076"></a>00076                 <span class="vhdlkeyword">wait</span> <span class="vhdlkeyword">until</span> <span class="vhdlchar"><a class="code" href="classtest_baud__generator_1_1behavior.html#a651731352ede98b937241d8cffe9a407" title="Signal to connect with UUT.">baud</a></span> <span class="vhdlchar">=</span> <span class="vhdlchar">&#39;</span><span class="vhdllogic"></span><span class="vhdllogic">0</span><span class="vhdlchar">&#39;</span>;
184 
<a name="l00077"></a>00077                 <span class="vhdlkeyword">wait</span> <span class="vhdlkeyword">until</span> <span class="vhdlchar"><a class="code" href="classtest_baud__generator_1_1behavior.html#a651731352ede98b937241d8cffe9a407" title="Signal to connect with UUT.">baud</a></span> <span class="vhdlchar">=</span> <span class="vhdlchar">&#39;</span><span class="vhdllogic"></span><span class="vhdllogic">1</span><span class="vhdlchar">&#39;</span>;
185 
<a name="l00078"></a>00078                 <span class="vhdlchar">t2</span> <span class="vhdlchar">:=</span> <span class="vhdlchar">now</span>;<span class="keyword">      -- Get current simulation <span class="comment">time</span></span>
186 
<a name="l00079"></a>00079                 <span class="vhdlkeyword">wait</span> <span class="vhdlkeyword">until</span> <span class="vhdlchar"><a class="code" href="classtest_baud__generator_1_1behavior.html#a651731352ede98b937241d8cffe9a407" title="Signal to connect with UUT.">baud</a></span> <span class="vhdlchar">=</span> <span class="vhdlchar">&#39;</span><span class="vhdllogic"></span><span class="vhdllogic">0</span><span class="vhdlchar">&#39;</span>;
187 
<a name="l00080"></a>00080                 <span class="vhdlkeyword">wait</span> <span class="vhdlkeyword">until</span> <span class="vhdlchar"><a class="code" href="classtest_baud__generator_1_1behavior.html#a651731352ede98b937241d8cffe9a407" title="Signal to connect with UUT.">baud</a></span> <span class="vhdlchar">=</span> <span class="vhdlchar">&#39;</span><span class="vhdllogic"></span><span class="vhdllogic">1</span><span class="vhdlchar">&#39;</span>;
188 
<a name="l00081"></a>00081                 <span class="vhdlkeyword">report</span> <span class="keyword">&quot;Current sim time=&quot;</span> <span class="vhdlchar">&amp;</span> <span class="comment">time</span><span class="vhdlchar">&#39;</span><span class="vhdlchar">image</span><span class="vhdlchar">(</span><span class="vhdlchar">now</span><span class="vhdlchar">)</span>;
189 
<a name="l00082"></a>00082                 period := t2 - t1;
190 
<a name="l00083"></a>00083                 <span class="keyword"></span>
191 
<a name="l00084"></a>00084 <span class="keyword">                -- Verify <span class="vhdlkeyword">if</span> we have the right period 1/115200 = </span><span class="vhdllogic">8</span>.<span class="vhdllogic">68</span> us
192 
<a name="l00085"></a>00085                 <span class="vhdlkeyword">assert</span> <span class="vhdlchar">period</span> <span class="vhdlchar">=</span> <span class="vhdllogic"></span><span class="vhdllogic">8</span>.<span class="vhdllogic">68</span> <span class="vhdlchar">us</span> <span class="vhdlkeyword">report</span> <span class="keyword">&quot;Wrong period expecter 8.68 us. got: &quot;</span><span class="vhdlchar">&amp;</span> <span class="comment">time</span><span class="vhdlchar">&#39;</span><span class="vhdlchar">image</span><span class="vhdlchar">(</span><span class="vhdlchar">period</span><span class="vhdlchar">)</span> <span class="vhdlkeyword">severity</span> <span class="vhdlchar">failure</span>;
193 
<a name="l00086"></a>00086       <span class="keyword"></span>
194 
<a name="l00087"></a>00087 <span class="keyword">                -- Stop Simulation</span>
195 
<a name="l00088"></a>00088                 <span class="vhdlkeyword">assert</span> <span class="vhdlchar">false</span> <span class="vhdlkeyword">report</span> <span class="keyword">&quot;NONE. End of simulation.&quot;</span> <span class="vhdlkeyword">severity</span> <span class="vhdlchar">failure</span>;
196 
<a name="l00089"></a>00089
197 
<a name="l00090"></a>00090       <span class="vhdlkeyword">wait</span>;
198 
<a name="l00091"></a>00091    <span class="vhdlkeyword">end</span> <span class="vhdlkeyword">process</span>;
199 
<a name="l00092"></a>00092
200 
<a name="l00093"></a>00093 <span class="vhdlkeyword">END</span>;
201 
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