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<div class="title">E:/uart_block/hdl/iseProject/uart_communication_blocks.vhd</div>  </div>
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113 
<div class="contents">
114 
<a href="uart__communication__blocks_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 <span class="vhdlkeyword">library </span><span class="keywordflow">IEEE</span>;
116 
<a name="l00004"></a>00004 <span class="vhdlkeyword">use </span>IEEE.STD_LOGIC_1164.<span class="vhdlkeyword">ALL</span>;
117 
<a name="l00005"></a>00005
118 
<a name="l00007"></a><a class="code" href="classuart__communication__blocks.html#ac442dca664056131bdaf5c92e4351e01">00007</a> <span class="vhdlkeyword">use </span>work.pkgDefinitions.<span class="vhdlkeyword">all</span>;
119 
<a name="l00008"></a>00008
120 
<a name="l00009"></a><a class="code" href="classuart__communication__blocks.html">00009</a> <span class="keywordflow">entity </span><a class="code" href="classuart__communication__blocks.html">uart_communication_blocks</a> <span class="vhdlkeyword">is</span>
121 
<a name="l00010"></a><a class="code" href="classuart__communication__blocks.html#a8951f9e34071cb1a681f0339ce4b63c4">00010</a>     <span class="vhdlkeyword">Port</span> <span class="vhdlchar">(</span> <span class="vhdlchar"><a class="code" href="classuart__communication__blocks.html#a8951f9e34071cb1a681f0339ce4b63c4" title="Global reset.">rst</a></span> <span class="vhdlchar">:</span> <span class="vhdlkeyword">in</span>  <span class="comment">STD_LOGIC</span>;
122 
<a name="l00011"></a><a class="code" href="classuart__communication__blocks.html#a3fe846251d47f950195c2f54bd129c61">00011</a>            <span class="vhdlchar"><a class="code" href="classuart__communication__blocks.html#a3fe846251d47f950195c2f54bd129c61" title="Global clock.">clk</a></span> <span class="vhdlchar">:</span> <span class="vhdlkeyword">in</span>  <span class="comment">STD_LOGIC</span>;
123 
<a name="l00012"></a><a class="code" href="classuart__communication__blocks.html#afa18bfa78951934bdb69cd7109c05aa3">00012</a>                           <span class="vhdlchar"><a class="code" href="classuart__communication__blocks.html#afa18bfa78951934bdb69cd7109c05aa3" title="Number of cycles to wait in order to generate desired baud.">cycle_wait_baud</a></span> <span class="vhdlchar">:</span> <span class="vhdlkeyword">in</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>;
124 
<a name="l00013"></a><a class="code" href="classuart__communication__blocks.html#a8cf74bfe6ea9ebd58f54385e60bcdb81">00013</a>            <span class="vhdlchar"><a class="code" href="classuart__communication__blocks.html#a8cf74bfe6ea9ebd58f54385e60bcdb81" title="Byte to transmit.">byte_tx</a></span> <span class="vhdlchar">:</span> <span class="vhdlkeyword">in</span>  <span class="comment">STD_LOGIC_VECTOR</span> <span class="vhdlchar">(</span><span class="vhdlchar">(</span><span class="vhdlchar">nBits</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>;
125 
<a name="l00014"></a><a class="code" href="classuart__communication__blocks.html#af86c06321eda298448164ea4af314d9d">00014</a>            <span class="vhdlchar"><a class="code" href="classuart__communication__blocks.html#af86c06321eda298448164ea4af314d9d" title="Byte to receive.">byte_rx</a></span> <span class="vhdlchar">:</span> <span class="vhdlkeyword">out</span>  <span class="comment">STD_LOGIC_VECTOR</span> <span class="vhdlchar">(</span><span class="vhdlchar">(</span><span class="vhdlchar">nBits</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>;
126 
<a name="l00015"></a><a class="code" href="classuart__communication__blocks.html#a6911204ed04f303c8c0aeb381132178f">00015</a>            <span class="vhdlchar"><a class="code" href="classuart__communication__blocks.html#a6911204ed04f303c8c0aeb381132178f" title="Indicate that byte has been sent.">data_sent_tx</a></span> <span class="vhdlchar">:</span> <span class="vhdlkeyword">out</span>  <span class="comment">STD_LOGIC</span>;
127 
<a name="l00016"></a><a class="code" href="classuart__communication__blocks.html#a660ac404fdc70a7d4ac57286d0916c4a">00016</a>            <span class="vhdlchar"><a class="code" href="classuart__communication__blocks.html#a660ac404fdc70a7d4ac57286d0916c4a" title="Indicate that we got a byte.">data_received_rx</a></span> <span class="vhdlchar">:</span> <span class="vhdlkeyword">out</span>  <span class="comment">STD_LOGIC</span>;
128 
<a name="l00017"></a><a class="code" href="classuart__communication__blocks.html#a663f39bc9103a1c89116711a4d4f2fbc">00017</a>                           <span class="vhdlchar"><a class="code" href="classuart__communication__blocks.html#a663f39bc9103a1c89116711a4d4f2fbc" title="Uart serial out.">serial_out</a></span> <span class="vhdlchar">:</span> <span class="vhdlkeyword">out</span> <span class="comment">std_logic</span>;
129 
<a name="l00018"></a><a class="code" href="classuart__communication__blocks.html#ab5c23ea4f1cdfe2567b19e81909ecfc0">00018</a>                           <span class="vhdlchar"><a class="code" href="classuart__communication__blocks.html#ab5c23ea4f1cdfe2567b19e81909ecfc0" title="Uart serial in.">serial_in</a></span> <span class="vhdlchar">:</span> <span class="vhdlkeyword">in</span> <span class="comment">std_logic</span>;
130 
<a name="l00019"></a><a class="code" href="classuart__communication__blocks.html#a2e4fb6cc48dc8f0ec684c80468ae6801">00019</a>            <span class="vhdlchar"><a class="code" href="classuart__communication__blocks.html#a2e4fb6cc48dc8f0ec684c80468ae6801" title="Initiate transmission.">start_tx</a></span> <span class="vhdlchar">:</span> <span class="vhdlkeyword">in</span>  <span class="comment">STD_LOGIC</span><span class="vhdlchar">)</span>;
131 
<a name="l00020"></a>00020 <span class="vhdlkeyword">end</span> <span class="vhdlchar">uart_communication_blocks</span>;
132 
<a name="l00021"></a>00021
133 
<a name="l00024"></a><a class="code" href="classuart__communication__blocks_1_1_behavioral.html">00024</a> <span class="vhdlkeyword">architecture</span> Behavioral <span class="vhdlkeyword">of</span> <a class="code" href="classuart__communication__blocks.html">uart_communication_blocks</a> is
134 
<a name="l00025"></a>00025 <span class="keyword"></span>
135 
<a name="l00026"></a>00026 <span class="keyword">-- Declare components...</span>
136 
<a name="l00027"></a><a class="code" href="classuart__communication__blocks_1_1_behavioral.html#ae24768054404554a4a48176c57346db3">00027</a> <span class="vhdlkeyword">component</span> <a class="code" href="classbaud__generator.html">baud_generator</a> <span class="vhdlkeyword">is</span>
137 
<a name="l00028"></a>00028     <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>;
138 
<a name="l00029"></a>00029                           <a class="code" href="classbaud__generator.html#a86b40337b1eabc8f0e5ef6f0747d0048" title="Clock input.">clk</a> : <span class="vhdlkeyword">in</span>  <span class="comment">STD_LOGIC</span>;
139 
<a name="l00030"></a>00030            <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>);
140 
<a name="l00031"></a>00031                           <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>;
141 
<a name="l00032"></a>00032            <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>);
142 
<a name="l00033"></a>00033 <span class="vhdlkeyword">end</span> <span class="vhdlkeyword">component</span>;
143 
<a name="l00034"></a>00034
144 
<a name="l00035"></a><a class="code" href="classuart__communication__blocks_1_1_behavioral.html#ae064295c084d4340bfe37d165c4c91f0">00035</a> <span class="vhdlkeyword">component</span> <a class="code" href="classserial__transmitter.html">serial_transmitter</a> <span class="vhdlkeyword">is</span>
145 
<a name="l00036"></a>00036      <span class="vhdlkeyword">Port</span> ( <a class="code" href="classserial__transmitter.html#a69a21b2223906c06964e170ed8472b60" title="Reset input.">rst</a> : <span class="vhdlkeyword">in</span>  <span class="comment">STD_LOGIC</span>;
146 
<a name="l00037"></a>00037            <a class="code" href="classserial__transmitter.html#a37deab9bf997cca5bdba26c411a2c051" title="Baud rate clock input.">baudClk</a> : <span class="vhdlkeyword">in</span>  <span class="comment">STD_LOGIC</span>;
147 
<a name="l00038"></a>00038            <a class="code" href="classserial__transmitter.html#ab901c30d3e4ea5dec40e2cbcd7d9db54" title="Byte to be sent.">data_byte</a> : <span class="vhdlkeyword">in</span>  <span class="comment">STD_LOGIC_VECTOR</span> ((nBits<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>);
148 
<a name="l00039"></a>00039                           <a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73" title="Indicate that byte has been sent.">data_sent</a> : <span class="vhdlkeyword">out</span> <span class="comment">STD_LOGIC</span>;
149 
<a name="l00040"></a>00040            <a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de" title="Uart serial output.">serial_out</a> : <span class="vhdlkeyword">out</span>  <span class="comment">STD_LOGIC</span>);
150 
<a name="l00041"></a>00041 <span class="vhdlkeyword">end</span> <span class="vhdlkeyword">component</span>;
151 
<a name="l00042"></a>00042
152 
<a name="l00043"></a><a class="code" href="classuart__communication__blocks_1_1_behavioral.html#a4c953f8cc516151da3f86f6d0e2bbde3">00043</a> <span class="vhdlkeyword">component</span> <a class="code" href="classserial__receiver.html">serial_receiver</a> <span class="vhdlkeyword">is</span>
153 
<a name="l00044"></a>00044     <span class="vhdlkeyword">Port</span> (
154 
<a name="l00045"></a>00045                           <a class="code" href="classserial__receiver.html#ae085c8310d2bb026ba06982b4ee625ca" title="Reset input.">rst</a> : <span class="vhdlkeyword">in</span> <span class="comment">STD_LOGIC</span>;
155 
<a name="l00046"></a>00046                           <a class="code" href="classserial__receiver.html#a15f70818a05c91cdc1990eab131f743d" title="Baud oversampled 8x (Best way to detect start bit)">baudOverSampleClk</a> : <span class="vhdlkeyword">in</span>  <span class="comment">STD_LOGIC</span>;
156 
<a name="l00047"></a>00047            <a class="code" href="classserial__receiver.html#a387303c39d306a2506581b02f261dc2f" title="Uart serial input.">serial_in</a> : <span class="vhdlkeyword">in</span>  <span class="comment">STD_LOGIC</span>;
157 
<a name="l00048"></a>00048            <a class="code" href="classserial__receiver.html#ac62bb0a9882c4e28633c87d94f2de2ae" title="Data received and ready to be read.">data_ready</a> : <span class="vhdlkeyword">out</span>  <span class="comment">STD_LOGIC</span>;
158 
<a name="l00049"></a>00049            <a class="code" href="classserial__receiver.html#a029d3624d857a6b6355d51475cc7e908" title="Data byte received.">data_byte</a> : <span class="vhdlkeyword">out</span>  <span class="comment">STD_LOGIC_VECTOR</span> ((nBits<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>));
159 
<a name="l00050"></a>00050 <span class="vhdlkeyword">end</span> <span class="vhdlkeyword">component</span>;
160 
<a name="l00051"></a>00051 <span class="vhdlkeyword">signal</span> <span class="vhdlchar">baud_tick</span> <span class="vhdlchar">:</span> <span class="comment">std_logic</span>;
161 
<a name="l00052"></a>00052 <span class="vhdlkeyword">signal</span> <span class="vhdlchar">baud_tick_oversample</span> <span class="vhdlchar">:</span> <span class="comment">std_logic</span>;
162 
<a name="l00053"></a>00053 <span class="vhdlkeyword">begin</span>
163 
<a name="l00055"></a>00055         uBaudGen : <a class="code" href="classbaud__generator.html">baud_generator</a> <span class="vhdlkeyword">port</span> <span class="vhdlkeyword">map</span> (
164 
<a name="l00056"></a>00056                 <a class="code" href="classbaud__generator.html#ab6aed4f6f0ae3df108d9e29e513e3ad2" title="Reset Input.">rst</a> =&gt; <a class="code" href="classuart__communication__blocks.html#a8951f9e34071cb1a681f0339ce4b63c4" title="Global reset.">rst</a> ,
165 
<a name="l00057"></a>00057                 <a class="code" href="classbaud__generator.html#a86b40337b1eabc8f0e5ef6f0747d0048" title="Clock input.">clk</a> =&gt; <a class="code" href="classuart__communication__blocks.html#a3fe846251d47f950195c2f54bd129c61" title="Global clock.">clk</a> ,
166 
<a name="l00058"></a>00058                 <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="classuart__communication__blocks.html#afa18bfa78951934bdb69cd7109c05aa3" title="Number of cycles to wait in order to generate desired baud.">cycle_wait_baud</a>,
167 
<a name="l00059"></a>00059                 <a class="code" href="classbaud__generator.html#ac451ec554e394c65d78e94f9aa1a2365" title="Oversample(8x) version of baud (Used on serial_receiver)">baud_oversample</a> =&gt; baud_tick_oversample,
168 
<a name="l00060"></a>00060                 <a class="code" href="classbaud__generator.html#ab3c0013cf4a2db5d1f3473d97bda35a4" title="Baud generation output (Used on serial_transmitter)">baud</a> =&gt; baud_tick
169 
<a name="l00061"></a>00061         <span class="vhdlchar">)</span>;
170 
<a name="l00062"></a>00062
171 
<a name="l00064"></a>00064         uTransmitter : <a class="code" href="classserial__transmitter.html">serial_transmitter</a> <span class="vhdlkeyword">port</span> <span class="vhdlkeyword">map</span> (
172 
<a name="l00065"></a>00065                 <a class="code" href="classserial__transmitter.html#a69a21b2223906c06964e170ed8472b60" title="Reset input.">rst</a> =&gt; <span class="vhdlkeyword">not</span> start_tx ,
173 
<a name="l00066"></a>00066                 <a class="code" href="classserial__transmitter.html#a37deab9bf997cca5bdba26c411a2c051" title="Baud rate clock input.">baudClk</a> =&gt; baud_tick,
174 
<a name="l00067"></a>00067                 <a class="code" href="classserial__transmitter.html#ab901c30d3e4ea5dec40e2cbcd7d9db54" title="Byte to be sent.">data_byte</a> =&gt; <a class="code" href="classuart__communication__blocks.html#a8cf74bfe6ea9ebd58f54385e60bcdb81" title="Byte to transmit.">byte_tx</a>,
175 
<a name="l00068"></a>00068                 <a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73" title="Indicate that byte has been sent.">data_sent</a> =&gt; <a class="code" href="classuart__communication__blocks.html#a6911204ed04f303c8c0aeb381132178f" title="Indicate that byte has been sent.">data_sent_tx</a>,
176 
<a name="l00069"></a>00069                 <a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de" title="Uart serial output.">serial_out</a> =&gt; <a class="code" href="classuart__communication__blocks.html#a663f39bc9103a1c89116711a4d4f2fbc" title="Uart serial out.">serial_out</a>
177 
<a name="l00070"></a>00070         <span class="vhdlchar">)</span>;
178 
<a name="l00071"></a>00071
179 
<a name="l00073"></a>00073         uReceiver : <a class="code" href="classserial__receiver.html">serial_receiver</a> <span class="vhdlkeyword">port</span> <span class="vhdlkeyword">map</span>(
180 
<a name="l00074"></a>00074                 <a class="code" href="classserial__receiver.html#ae085c8310d2bb026ba06982b4ee625ca" title="Reset input.">rst</a> =&gt; <a class="code" href="classuart__communication__blocks.html#a8951f9e34071cb1a681f0339ce4b63c4" title="Global reset.">rst</a> ,
181 
<a name="l00075"></a>00075                 <a class="code" href="classserial__receiver.html#a15f70818a05c91cdc1990eab131f743d" title="Baud oversampled 8x (Best way to detect start bit)">baudOverSampleClk</a> =&gt; baud_tick_oversample,
182 
<a name="l00076"></a>00076                 <a class="code" href="classserial__receiver.html#a387303c39d306a2506581b02f261dc2f" title="Uart serial input.">serial_in</a> =&gt; <a class="code" href="classuart__communication__blocks.html#ab5c23ea4f1cdfe2567b19e81909ecfc0" title="Uart serial in.">serial_in</a> ,
183 
<a name="l00077"></a>00077                 <a class="code" href="classserial__receiver.html#ac62bb0a9882c4e28633c87d94f2de2ae" title="Data received and ready to be read.">data_ready</a> =&gt; <a class="code" href="classuart__communication__blocks.html#a660ac404fdc70a7d4ac57286d0916c4a" title="Indicate that we got a byte.">data_received_rx</a>,
184 
<a name="l00078"></a>00078                 <a class="code" href="classserial__receiver.html#a029d3624d857a6b6355d51475cc7e908" title="Data byte received.">data_byte</a> =&gt; <a class="code" href="classuart__communication__blocks.html#af86c06321eda298448164ea4af314d9d" title="Byte to receive.">byte_rx</a>
185 
<a name="l00079"></a>00079         <span class="vhdlchar">)</span>;
186 
<a name="l00080"></a>00080
187 
<a name="l00081"></a>00081 <span class="vhdlkeyword">end</span> <span class="vhdlchar">Behavioral</span>;
188 
<a name="l00082"></a>00082
189 
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