OpenCores
URL https://opencores.org/ocsvn/uart_block/uart_block/trunk

Subversion Repositories uart_block

[/] [uart_block/] [trunk/] [docs/] [doxygenDocs/] [html/] [serial__transmitter_8vhd_source.html] - Blame information for rev 40

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 40 leonardoar
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2
<html xmlns="http://www.w3.org/1999/xhtml">
3
<head>
4
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
5
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
6
<title>Uart wishbone slave Documentation: E:/uart_block/hdl/iseProject/serial_transmitter.vhd Source File</title>
7
 
8
<link href="tabs.css" rel="stylesheet" type="text/css"/>
9
<link href="doxygen.css" rel="stylesheet" type="text/css" />
10
<link href="navtree.css" rel="stylesheet" type="text/css"/>
11
<script type="text/javascript" src="jquery.js"></script>
12
<script type="text/javascript" src="resize.js"></script>
13
<script type="text/javascript" src="navtree.js"></script>
14
<script type="text/javascript">
15
  $(document).ready(initResizable);
16
</script>
17
<link href="search/search.css" rel="stylesheet" type="text/css"/>
18
<script type="text/javascript" src="search/search.js"></script>
19
<script type="text/javascript">
20
  $(document).ready(function() { searchBox.OnSelectItem(0); });
21
</script>
22
 
23
</head>
24
<body>
25
<div id="top"><!-- do not remove this div! -->
26
 
27
 
28
<div id="titlearea">
29
<table cellspacing="0" cellpadding="0">
30
 <tbody>
31
 <tr style="height: 56px;">
32
 
33
 
34
  <td style="padding-left: 0.5em;">
35
   <div id="projectname">Uart wishbone slave Documentation
36
 
37
   </div>
38
 
39
  </td>
40
 
41
 
42
 
43
 </tr>
44
 </tbody>
45
</table>
46
</div>
47
 
48
<!-- Generated by Doxygen 1.8.0 -->
49
<script type="text/javascript">
50
var searchBox = new SearchBox("searchBox", "search",false,'Search');
51
</script>
52
  <div id="navrow1" class="tabs">
53
    <ul class="tablist">
54
      <li><a href="index.html"><span>Main&#160;Page</span></a></li>
55
      <li><a href="namespaces.html"><span>Packages</span></a></li>
56
      <li><a href="annotated.html"><span>Design&#160;Unit&#160;List</span></a></li>
57
      <li class="current"><a href="files.html"><span>Files</span></a></li>
58
      <li>
59
        <div id="MSearchBox" class="MSearchBoxInactive">
60
        <span class="left">
61
          <img id="MSearchSelect" src="search/mag_sel.png"
62
               onmouseover="return searchBox.OnSearchSelectShow()"
63
               onmouseout="return searchBox.OnSearchSelectHide()"
64
               alt=""/>
65
          <input type="text" id="MSearchField" value="Search" accesskey="S"
66
               onfocus="searchBox.OnSearchFieldFocus(true)"
67
               onblur="searchBox.OnSearchFieldFocus(false)"
68
               onkeyup="searchBox.OnSearchFieldChange(event)"/>
69
          </span><span class="right">
70
            <a id="MSearchClose" href="javascript:searchBox.CloseResultsWindow()"><img id="MSearchCloseImg" border="0" src="search/close.png" alt=""/></a>
71
          </span>
72
        </div>
73
      </li>
74
    </ul>
75
  </div>
76
  <div id="navrow2" class="tabs2">
77
    <ul class="tablist">
78
      <li><a href="files.html"><span>File&#160;List</span></a></li>
79
    </ul>
80
  </div>
81
</div>
82
<div id="side-nav" class="ui-resizable side-nav-resizable">
83
  <div id="nav-tree">
84
    <div id="nav-tree-contents">
85
    </div>
86
  </div>
87
  <div id="splitbar" style="-moz-user-select:none;"
88
       class="ui-resizable-handle">
89
  </div>
90
</div>
91
<script type="text/javascript">
92
  initNavTree('serial__transmitter_8vhd.html','');
93
</script>
94
<div id="doc-content">
95
<!-- window showing the filter options -->
96
<div id="MSearchSelectWindow"
97
     onmouseover="return searchBox.OnSearchSelectShow()"
98
     onmouseout="return searchBox.OnSearchSelectHide()"
99
     onkeydown="return searchBox.OnSearchSelectKey(event)">
100
<a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark">&#160;</span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark">&#160;</span>Classes</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark">&#160;</span>Namespaces</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark">&#160;</span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark">&#160;</span>Variables</a></div>
101
 
102
<!-- iframe showing the search results (closed by default) -->
103
<div id="MSearchResultsWindow">
104
<iframe src="javascript:void(0)" frameborder="0"
105
        name="MSearchResults" id="MSearchResults">
106
</iframe>
107
</div>
108
 
109
<div class="header">
110
  <div class="headertitle">
111
<div class="title">E:/uart_block/hdl/iseProject/serial_transmitter.vhd</div>  </div>
112
</div><!--header-->
113
<div class="contents">
114
<a href="serial__transmitter_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="classserial__transmitter.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="classserial__transmitter.html">00009</a> <span class="keywordflow">entity </span><a class="code" href="classserial__transmitter.html">serial_transmitter</a> <span class="vhdlkeyword">is</span>
121
<a name="l00010"></a><a class="code" href="classserial__transmitter.html#a69a21b2223906c06964e170ed8472b60">00010</a>     <span class="vhdlkeyword">Port</span> <span class="vhdlchar">(</span> <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a69a21b2223906c06964e170ed8472b60" title="Reset input.">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="classserial__transmitter.html#a37deab9bf997cca5bdba26c411a2c051">00011</a>            <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a37deab9bf997cca5bdba26c411a2c051" title="Baud rate clock input.">baudClk</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="classserial__transmitter.html#ab901c30d3e4ea5dec40e2cbcd7d9db54">00012</a>            <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ab901c30d3e4ea5dec40e2cbcd7d9db54" title="Byte to be sent.">data_byte</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>;
124
<a name="l00013"></a><a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73">00013</a>                           <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73" title="Indicate that byte has been sent.">data_sent</a></span> <span class="vhdlchar">:</span> <span class="vhdlkeyword">out</span> <span class="comment">STD_LOGIC</span>;
125
<a name="l00014"></a><a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de">00014</a>            <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de" title="Uart serial output.">serial_out</a></span> <span class="vhdlchar">:</span> <span class="vhdlkeyword">out</span>  <span class="comment">STD_LOGIC</span><span class="vhdlchar">)</span>;
126
<a name="l00015"></a>00015 <span class="vhdlkeyword">end</span> <span class="vhdlchar">serial_transmitter</span>;
127
<a name="l00016"></a>00016
128
<a name="l00019"></a><a class="code" href="classserial__transmitter_1_1_behavioral.html">00019</a> <span class="vhdlkeyword">architecture</span> Behavioral <span class="vhdlkeyword">of</span> <a class="code" href="classserial__transmitter.html">serial_transmitter</a> is
129
<a name="l00020"></a>00020 <span class="vhdlkeyword">signal</span> <span class="vhdlchar">current_s</span><span class="vhdlchar">,</span><span class="vhdlchar">next_s</span><span class="vhdlchar">:</span> <span class="vhdlchar">txStates</span>;
130
<a name="l00021"></a>00021 <span class="vhdlkeyword">begin</span>
131
<a name="l00022"></a>00022         <span class="keyword"></span>
132
<a name="l00023"></a>00023 <span class="keyword">        -- <span class="vhdlkeyword">Next</span> state <span class="vhdlkeyword">process</span></span>
133
<a name="l00024"></a>00024         <span class="vhdlkeyword">process</span> (<a class="code" href="classserial__transmitter.html#a69a21b2223906c06964e170ed8472b60" title="Reset input.">rst</a>, <a class="code" href="classserial__transmitter.html#a37deab9bf997cca5bdba26c411a2c051" title="Baud rate clock input.">baudClk</a>)
134
<a name="l00025"></a>00025 <span class="vhdlkeyword">        begin</span>
135
<a name="l00026"></a>00026                 <span class="vhdlkeyword">if</span> <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a69a21b2223906c06964e170ed8472b60" title="Reset input.">rst</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> <span class="vhdlkeyword">then</span>
136
<a name="l00027"></a>00027                         <span class="vhdlchar">current_s</span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">tx_idle</span>;
137
<a name="l00028"></a>00028                 <span class="vhdlkeyword">elsif</span> <span class="vhdlchar">rising_edge</span><span class="vhdlchar">(</span><span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a37deab9bf997cca5bdba26c411a2c051" title="Baud rate clock input.">baudClk</a></span><span class="vhdlchar">)</span> <span class="vhdlkeyword">then</span>
138
<a name="l00029"></a>00029                         <span class="vhdlchar">current_s</span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">next_s</span>;
139
<a name="l00030"></a>00030                 <span class="vhdlkeyword">end</span> <span class="vhdlkeyword">if</span>;
140
<a name="l00031"></a>00031         <span class="vhdlkeyword">end</span> <span class="vhdlkeyword">process</span>;
141
<a name="l00032"></a>00032
142
<a name="l00033"></a>00033         <span class="vhdlkeyword">process</span> (current_s, <a class="code" href="classserial__transmitter.html#ab901c30d3e4ea5dec40e2cbcd7d9db54" title="Byte to be sent.">data_byte</a>)
143
<a name="l00034"></a>00034 <span class="vhdlkeyword">        begin</span>
144
<a name="l00035"></a>00035                 <span class="vhdlkeyword">case</span> <span class="vhdlchar">current_s</span> <span class="vhdlkeyword">is</span>
145
<a name="l00036"></a>00036                         <span class="vhdlkeyword">when</span> <span class="vhdlchar">tx_idle</span> <span class="vhdlchar">=</span><span class="vhdlchar">&gt;</span>
146
<a name="l00037"></a>00037                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de" title="Uart serial output.">serial_out</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>;
147
<a name="l00038"></a>00038                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73" title="Indicate that byte has been sent.">data_sent</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>;
148
<a name="l00039"></a>00039                                 <span class="vhdlchar">next_s</span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">tx_start</span>;
149
<a name="l00040"></a>00040                         <span class="keyword"></span>
150
<a name="l00041"></a>00041 <span class="keyword">                        -- Start <span class="comment">bit</span></span>
151
<a name="l00042"></a>00042                         <span class="vhdlkeyword">when</span> <span class="vhdlchar">tx_start</span> <span class="vhdlchar">=</span><span class="vhdlchar">&gt;</span>
152
<a name="l00043"></a>00043                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de" title="Uart serial output.">serial_out</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>;
153
<a name="l00044"></a>00044                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73" title="Indicate that byte has been sent.">data_sent</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>;
154
<a name="l00045"></a>00045                                 <span class="vhdlchar">next_s</span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">bit0</span>;
155
<a name="l00046"></a>00046
156
<a name="l00047"></a>00047                         <span class="vhdlkeyword">when</span> <span class="vhdlchar">bit0</span> <span class="vhdlchar">=</span><span class="vhdlchar">&gt;</span><span class="keyword">    -- Send the least significat <span class="comment">bit</span></span>
157
<a name="l00048"></a>00048                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de" title="Uart serial output.">serial_out</a></span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ab901c30d3e4ea5dec40e2cbcd7d9db54" title="Byte to be sent.">data_byte</a></span><span class="vhdlchar">(</span><span class="vhdllogic"></span><span class="vhdllogic">0</span><span class="vhdlchar">)</span>;
158
<a name="l00049"></a>00049                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73" title="Indicate that byte has been sent.">data_sent</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>;
159
<a name="l00050"></a>00050                                 <span class="vhdlchar">next_s</span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">bit1</span>;
160
<a name="l00051"></a>00051
161
<a name="l00052"></a>00052                         <span class="vhdlkeyword">when</span> <span class="vhdlchar">bit1</span> <span class="vhdlchar">=</span><span class="vhdlchar">&gt;</span>
162
<a name="l00053"></a>00053                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de" title="Uart serial output.">serial_out</a></span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ab901c30d3e4ea5dec40e2cbcd7d9db54" title="Byte to be sent.">data_byte</a></span><span class="vhdlchar">(</span><span class="vhdllogic"></span><span class="vhdllogic">1</span><span class="vhdlchar">)</span>;
163
<a name="l00054"></a>00054                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73" title="Indicate that byte has been sent.">data_sent</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>;
164
<a name="l00055"></a>00055                                 <span class="vhdlchar">next_s</span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">bit2</span>;
165
<a name="l00056"></a>00056
166
<a name="l00057"></a>00057                         <span class="vhdlkeyword">when</span> <span class="vhdlchar">bit2</span> <span class="vhdlchar">=</span><span class="vhdlchar">&gt;</span>
167
<a name="l00058"></a>00058                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de" title="Uart serial output.">serial_out</a></span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ab901c30d3e4ea5dec40e2cbcd7d9db54" title="Byte to be sent.">data_byte</a></span><span class="vhdlchar">(</span><span class="vhdllogic"></span><span class="vhdllogic">2</span><span class="vhdlchar">)</span>;
168
<a name="l00059"></a>00059                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73" title="Indicate that byte has been sent.">data_sent</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>;
169
<a name="l00060"></a>00060                                 <span class="vhdlchar">next_s</span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">bit3</span>;
170
<a name="l00061"></a>00061
171
<a name="l00062"></a>00062                         <span class="vhdlkeyword">when</span> <span class="vhdlchar">bit3</span> <span class="vhdlchar">=</span><span class="vhdlchar">&gt;</span>
172
<a name="l00063"></a>00063                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de" title="Uart serial output.">serial_out</a></span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ab901c30d3e4ea5dec40e2cbcd7d9db54" title="Byte to be sent.">data_byte</a></span><span class="vhdlchar">(</span><span class="vhdllogic"></span><span class="vhdllogic">3</span><span class="vhdlchar">)</span>;
173
<a name="l00064"></a>00064                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73" title="Indicate that byte has been sent.">data_sent</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>;
174
<a name="l00065"></a>00065                                 <span class="vhdlchar">next_s</span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">bit4</span>;
175
<a name="l00066"></a>00066
176
<a name="l00067"></a>00067                         <span class="vhdlkeyword">when</span> <span class="vhdlchar">bit4</span> <span class="vhdlchar">=</span><span class="vhdlchar">&gt;</span>
177
<a name="l00068"></a>00068                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de" title="Uart serial output.">serial_out</a></span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ab901c30d3e4ea5dec40e2cbcd7d9db54" title="Byte to be sent.">data_byte</a></span><span class="vhdlchar">(</span><span class="vhdllogic"></span><span class="vhdllogic">4</span><span class="vhdlchar">)</span>;
178
<a name="l00069"></a>00069                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73" title="Indicate that byte has been sent.">data_sent</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>;
179
<a name="l00070"></a>00070                                 <span class="vhdlchar">next_s</span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">bit5</span>;
180
<a name="l00071"></a>00071
181
<a name="l00072"></a>00072                         <span class="vhdlkeyword">when</span> <span class="vhdlchar">bit5</span> <span class="vhdlchar">=</span><span class="vhdlchar">&gt;</span>
182
<a name="l00073"></a>00073                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de" title="Uart serial output.">serial_out</a></span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ab901c30d3e4ea5dec40e2cbcd7d9db54" title="Byte to be sent.">data_byte</a></span><span class="vhdlchar">(</span><span class="vhdllogic"></span><span class="vhdllogic">5</span><span class="vhdlchar">)</span>;
183
<a name="l00074"></a>00074                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73" title="Indicate that byte has been sent.">data_sent</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>;
184
<a name="l00075"></a>00075                                 <span class="vhdlchar">next_s</span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">bit6</span>;
185
<a name="l00076"></a>00076
186
<a name="l00077"></a>00077                         <span class="vhdlkeyword">when</span> <span class="vhdlchar">bit6</span> <span class="vhdlchar">=</span><span class="vhdlchar">&gt;</span>
187
<a name="l00078"></a>00078                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de" title="Uart serial output.">serial_out</a></span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ab901c30d3e4ea5dec40e2cbcd7d9db54" title="Byte to be sent.">data_byte</a></span><span class="vhdlchar">(</span><span class="vhdllogic"></span><span class="vhdllogic">6</span><span class="vhdlchar">)</span>;
188
<a name="l00079"></a>00079                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73" title="Indicate that byte has been sent.">data_sent</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>;
189
<a name="l00080"></a>00080                                 <span class="vhdlchar">next_s</span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">bit7</span>;
190
<a name="l00081"></a>00081
191
<a name="l00082"></a>00082                         <span class="vhdlkeyword">when</span> <span class="vhdlchar">bit7</span> <span class="vhdlchar">=</span><span class="vhdlchar">&gt;</span><span class="keyword">    -- Send the most significat <span class="comment">bit</span></span>
192
<a name="l00083"></a>00083                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de" title="Uart serial output.">serial_out</a></span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ab901c30d3e4ea5dec40e2cbcd7d9db54" title="Byte to be sent.">data_byte</a></span><span class="vhdlchar">(</span><span class="vhdllogic"></span><span class="vhdllogic">7</span><span class="vhdlchar">)</span>;
193
<a name="l00084"></a>00084                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73" title="Indicate that byte has been sent.">data_sent</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>;
194
<a name="l00085"></a>00085                                 <span class="vhdlchar">next_s</span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">tx_stop1</span>;
195
<a name="l00086"></a>00086
196
<a name="l00087"></a>00087
197
<a name="l00088"></a>00088                         <span class="vhdlkeyword">when</span> <span class="vhdlchar">tx_stop1</span> <span class="vhdlchar">=</span><span class="vhdlchar">&gt;</span>
198
<a name="l00089"></a>00089                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de" title="Uart serial output.">serial_out</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>;
199
<a name="l00090"></a>00090                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73" title="Indicate that byte has been sent.">data_sent</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>;
200
<a name="l00091"></a>00091                                 <span class="vhdlchar">next_s</span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">tx_stop2</span>;
201
<a name="l00092"></a>00092
202
<a name="l00093"></a>00093                         <span class="vhdlkeyword">when</span> <span class="vhdlchar">tx_stop2</span> <span class="vhdlchar">=</span><span class="vhdlchar">&gt;</span><span class="keyword">        -- Stop here <span class="vhdlkeyword">and</span> <span class="vhdlkeyword">wait</span> <span class="vhdlkeyword">for</span> other reset</span>
203
<a name="l00094"></a>00094                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#ac65328ce72c56f359addcc4876d091de" title="Uart serial output.">serial_out</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>;
204
<a name="l00095"></a>00095                                 <span class="vhdlchar"><a class="code" href="classserial__transmitter.html#a5bd0a4b084d0e368d77bac41cc143a73" title="Indicate that byte has been sent.">data_sent</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>;
205
<a name="l00096"></a>00096                                 <span class="vhdlchar">next_s</span> <span class="vhdlchar">&lt;=</span> <span class="vhdlchar">tx_stop2</span>;
206
<a name="l00097"></a>00097
207
<a name="l00098"></a>00098                 <span class="vhdlkeyword">end</span> <span class="vhdlkeyword">case</span>;
208
<a name="l00099"></a>00099         <span class="vhdlkeyword">end</span> <span class="vhdlkeyword">process</span>;
209
<a name="l00100"></a>00100
210
<a name="l00101"></a>00101 <span class="vhdlkeyword">end</span> <span class="vhdlchar">Behavioral</span>;
211
<a name="l00102"></a>00102
212
</pre></div></div><!-- contents -->
213
</div>
214
  <div id="nav-path" class="navpath">
215
    <ul>
216
      <li class="navelem"><a class="el" href="serial__transmitter_8vhd.html">serial_transmitter.vhd</a>      </li>
217
 
218
    <li class="footer">Generated on Sat May 12 2012 22:28:05 for Uart wishbone slave Documentation by
219
    <a href="http://www.doxygen.org/index.html">
220
    <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.0 </li>
221
   </ul>
222
 </div>
223
 
224
 
225
</body>
226
</html>

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.