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<div class="title">/Users/fmalpartida/development/ardWorkspace/LiquidCrystal_I2C/LiquiCrystal_I2C/FastIO.cpp</div>  </div>
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<a href="_fast_i_o_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// ---------------------------------------------------------------------------</span>
<a name="l00002"></a>00002 <span class="comment">// Created by Florian Fida on 20/01/12</span>
<a name="l00003"></a>00003 <span class="comment">// Copyright 2012 - Under creative commons license 3.0:</span>
<a name="l00004"></a>00004 <span class="comment">//        Attribution-ShareAlike CC BY-SA</span>
<a name="l00005"></a>00005 <span class="comment">//        http://creativecommons.org/licenses/by-sa/3.0/</span>
<a name="l00006"></a>00006 <span class="comment">//</span>
<a name="l00007"></a>00007 <span class="comment">// This software is furnished &quot;as is&quot;, without technical support, and with no</span>
<a name="l00008"></a>00008 <span class="comment">// warranty, express or implied, as to its usefulness for any purpose.</span>
<a name="l00009"></a>00009 <span class="comment">// ---------------------------------------------------------------------------</span>
<a name="l00010"></a>00010 <span class="comment">// fio_shiftOut1 functions are based on Shif1 protocol developed by Roman Black </span>
<a name="l00011"></a>00011 <span class="comment">// (http://www.romanblack.com/shift1.htm)</span>
<a name="l00012"></a>00012 <span class="comment">//</span>
<a name="l00013"></a>00013 <span class="comment">// Thread Safe: No</span>
<a name="l00014"></a>00014 <span class="comment">// Extendable: Yes</span>
<a name="l00015"></a>00015 <span class="comment">//</span>
<a name="l00016"></a>00016 <span class="comment">// @file FastIO.h</span>
<a name="l00017"></a>00017 <span class="comment">// This file implements basic fast IO routines.</span>
<a name="l00018"></a>00018 <span class="comment">// </span>
<a name="l00019"></a>00019 <span class="comment">// @brief </span>
<a name="l00020"></a>00020 <span class="comment">//</span>
<a name="l00021"></a>00021 <span class="comment">// @version API 1.0.0</span>
<a name="l00022"></a>00022 <span class="comment">//</span>
<a name="l00023"></a>00023 <span class="comment">// @author Florian Fida -</span>
<a name="l00024"></a>00024 <span class="comment">//</span>
<a name="l00025"></a>00025 <span class="comment">// 2012-03-16 bperrybap updated fio_shiftout() to be smaller &amp; faster</span>
<a name="l00026"></a>00026 <span class="comment">//</span>
<a name="l00027"></a>00027 <span class="comment">// @todo:</span>
<a name="l00028"></a>00028 <span class="comment">//  support chipkit:</span>
<a name="l00029"></a>00029 <span class="comment">// (https://github.com/chipKIT32/chipKIT32-MAX/blob/master/hardware/pic32/</span>
<a name="l00030"></a>00030 <span class="comment">//   cores/pic32/wiring_digital.c)</span>
<a name="l00031"></a>00031 <span class="comment">// ---------------------------------------------------------------------------</span>
<a name="l00032"></a>00032 <span class="preprocessor">#include &quot;<a class="code" href="_fast_i_o_8h.html">FastIO.h</a>&quot;</span>
<a name="l00033"></a>00033 
<a name="l00034"></a>00034 
<a name="l00035"></a><a class="code" href="_fast_i_o_8h.html#a385ae40d960c1a57e86818332476a802">00035</a> <a class="code" href="_fast_i_o_8h.html#ae44ea3af54ef26db03f1ae2ea62f9c1f">fio_register</a> <a class="code" href="_fast_i_o_8cpp.html#a04210cc785c3b4a11c86f794949c327f">fio_pinToOutputRegister</a>(uint8_t pin, uint8_t initial_state)
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037         pinMode(pin, OUTPUT);
<a name="l00038"></a>00038    
<a name="l00039"></a>00039         <span class="keywordflow">if</span>(initial_state != <a class="code" href="_fast_i_o_8h.html#a688a4adbb87520a2b68681bd6bfb199e">SKIP</a>) 
<a name="l00040"></a>00040    {
<a name="l00041"></a>00041       digitalWrite(pin, initial_state); <span class="comment">// also turns off pwm timer</span>
<a name="l00042"></a>00042    }
<a name="l00043"></a>00043 <span class="preprocessor">#ifdef FIO_FALLBACK</span>
<a name="l00044"></a>00044 <span class="preprocessor"></span>        <span class="comment">//  just wasting memory if not using fast io...</span>
<a name="l00045"></a>00045         <span class="keywordflow">return</span> 0;
<a name="l00046"></a>00046 <span class="preprocessor">#else</span>
<a name="l00047"></a>00047 <span class="preprocessor"></span>        <span class="keywordflow">return</span> portOutputRegister(digitalPinToPort(pin));
<a name="l00048"></a>00048 <span class="preprocessor">#endif</span>
<a name="l00049"></a>00049 <span class="preprocessor"></span>}
<a name="l00050"></a>00050 
<a name="l00051"></a>00051 
<a name="l00052"></a><a class="code" href="_fast_i_o_8h.html#afb934fc0ded94cbb5ed8ed14e2a123ed">00052</a> <a class="code" href="_fast_i_o_8h.html#ae44ea3af54ef26db03f1ae2ea62f9c1f">fio_register</a> <a class="code" href="_fast_i_o_8cpp.html#afb934fc0ded94cbb5ed8ed14e2a123ed">fio_pinToInputRegister</a>(uint8_t pin)
<a name="l00053"></a>00053 {
<a name="l00054"></a>00054         pinMode(pin, INPUT);
<a name="l00055"></a>00055         digitalWrite(pin, LOW); <span class="comment">// also turns off pwm timer and pullup</span>
<a name="l00056"></a>00056 <span class="preprocessor">#ifdef FIO_FALLBACK</span>
<a name="l00057"></a>00057 <span class="preprocessor"></span>        <span class="comment">//  just wasting memory if not using fast io...</span>
<a name="l00058"></a>00058         <span class="keywordflow">return</span> 0;
<a name="l00059"></a>00059 <span class="preprocessor">#else</span>
<a name="l00060"></a>00060 <span class="preprocessor"></span>        <span class="keywordflow">return</span> portInputRegister(digitalPinToPort(pin));
<a name="l00061"></a>00061 <span class="preprocessor">#endif</span>
<a name="l00062"></a>00062 <span class="preprocessor"></span>}
<a name="l00063"></a>00063 
<a name="l00064"></a>00064 
<a name="l00065"></a><a class="code" href="_fast_i_o_8h.html#a07a19dfbdca1afaca5d666bdaa3be7d5">00065</a> <a class="code" href="_fast_i_o_8h.html#a0a595a88b29bcfd1540b6fac75787937">fio_bit</a> <a class="code" href="_fast_i_o_8cpp.html#a07a19dfbdca1afaca5d666bdaa3be7d5">fio_pinToBit</a>(uint8_t pin)
<a name="l00066"></a>00066 {
<a name="l00067"></a>00067 <span class="preprocessor">#ifdef FIO_FALLBACK</span>
<a name="l00068"></a>00068 <span class="preprocessor"></span>        <span class="comment">// (ab)use the bit variable to store the pin</span>
<a name="l00069"></a>00069         <span class="keywordflow">return</span> pin;
<a name="l00070"></a>00070 <span class="preprocessor">#else</span>
<a name="l00071"></a>00071 <span class="preprocessor"></span>        <span class="keywordflow">return</span> digitalPinToBitMask(pin);
<a name="l00072"></a>00072 <span class="preprocessor">#endif</span>
<a name="l00073"></a>00073 <span class="preprocessor"></span>}
<a name="l00074"></a>00074 
<a name="l00075"></a>00075 
<a name="l00076"></a><a class="code" href="_fast_i_o_8h.html#ae91bbe682b02a5842c291055c0e998b5">00076</a> <span class="keywordtype">void</span> <a class="code" href="_fast_i_o_8cpp.html#ae91bbe682b02a5842c291055c0e998b5">fio_digitalWrite</a>(<a class="code" href="_fast_i_o_8h.html#ae44ea3af54ef26db03f1ae2ea62f9c1f">fio_register</a> pinRegister, <a class="code" href="_fast_i_o_8h.html#a0a595a88b29bcfd1540b6fac75787937">fio_bit</a> pinBit, uint8_t value) 
<a name="l00077"></a>00077 {
<a name="l00078"></a>00078 <span class="preprocessor">#ifdef FIO_FALLBACK</span>
<a name="l00079"></a>00079 <span class="preprocessor"></span>        digitalWrite(pinBit, value);
<a name="l00080"></a>00080 <span class="preprocessor">#else</span>
<a name="l00081"></a>00081 <span class="preprocessor"></span>   <a class="code" href="_fast_i_o_8h.html#a04971fe5fabe4129736708c494e08e6d">ATOMIC_BLOCK</a>(<a class="code" href="_fast_i_o_8h.html#a362c18b15a09703e42e1c246c47420ef">ATOMIC_RESTORESTATE</a>)
<a name="l00082"></a>00082    {
<a name="l00083"></a>00083       <span class="keywordflow">if</span>(value == LOW)
<a name="l00084"></a>00084       {
<a name="l00085"></a>00085          <a class="code" href="_fast_i_o_8h.html#ac8f00a1bccb98109531b88fbb6e91478">fio_digitalWrite_LOW</a>(pinRegister,pinBit);
<a name="l00086"></a>00086       }
<a name="l00087"></a>00087       <span class="keywordflow">else</span>
<a name="l00088"></a>00088       {
<a name="l00089"></a>00089          <a class="code" href="_fast_i_o_8h.html#a89e1c62276052100c62b6c82a2e95622">fio_digitalWrite_HIGH</a>(pinRegister,pinBit);
<a name="l00090"></a>00090       }
<a name="l00091"></a>00091    }
<a name="l00092"></a>00092 <span class="preprocessor">#endif</span>
<a name="l00093"></a>00093 <span class="preprocessor"></span>}
<a name="l00094"></a>00094 
<a name="l00095"></a><a class="code" href="_fast_i_o_8h.html#a197336e47e1c3f929056ce3abbbc7e8d">00095</a> <span class="keywordtype">int</span> <a class="code" href="_fast_i_o_8cpp.html#a83fc2fdc19ab3f9aade9e1a2f39e81a6">fio_digitalRead</a>(<a class="code" href="_fast_i_o_8h.html#ae44ea3af54ef26db03f1ae2ea62f9c1f">fio_register</a> pinRegister, uint8_t pinBit)
<a name="l00096"></a>00096 {
<a name="l00097"></a>00097 <span class="preprocessor">#ifdef FIO_FALLBACK</span>
<a name="l00098"></a>00098 <span class="preprocessor"></span>        <span class="keywordflow">return</span> digitalRead (pinBit);
<a name="l00099"></a>00099 <span class="preprocessor">#else</span>
<a name="l00100"></a>00100 <span class="preprocessor"></span>        <span class="keywordflow">if</span> (*pinRegister &amp; pinBit)
<a name="l00101"></a>00101    {
<a name="l00102"></a>00102       <span class="keywordflow">return</span> HIGH;
<a name="l00103"></a>00103    }
<a name="l00104"></a>00104         <span class="keywordflow">return</span> LOW;
<a name="l00105"></a>00105 <span class="preprocessor">#endif</span>
<a name="l00106"></a>00106 <span class="preprocessor"></span>}
<a name="l00107"></a>00107 
<a name="l00108"></a><a class="code" href="_fast_i_o_8h.html#a56c72b9f00680662229895ab22aaa743">00108</a> <span class="keywordtype">void</span> <a class="code" href="_fast_i_o_8cpp.html#a56c72b9f00680662229895ab22aaa743">fio_shiftOut</a> (<a class="code" href="_fast_i_o_8h.html#ae44ea3af54ef26db03f1ae2ea62f9c1f">fio_register</a> dataRegister, <a class="code" href="_fast_i_o_8h.html#a0a595a88b29bcfd1540b6fac75787937">fio_bit</a> dataBit, 
<a name="l00109"></a>00109                    <a class="code" href="_fast_i_o_8h.html#ae44ea3af54ef26db03f1ae2ea62f9c1f">fio_register</a> clockRegister, <a class="code" href="_fast_i_o_8h.html#a0a595a88b29bcfd1540b6fac75787937">fio_bit</a> clockBit, 
<a name="l00110"></a>00110                    uint8_t value, uint8_t bitOrder)
<a name="l00111"></a>00111 {
<a name="l00112"></a>00112         <span class="comment">// # disable interrupts</span>
<a name="l00113"></a>00113         int8_t i;
<a name="l00114"></a>00114    
<a name="l00115"></a>00115         <span class="keywordflow">if</span>(bitOrder == LSBFIRST)
<a name="l00116"></a>00116         {
<a name="l00117"></a>00117                 <span class="keywordflow">for</span>(i = 0; i &lt; 8; i++)
<a name="l00118"></a>00118                 {
<a name="l00119"></a>00119                         <a class="code" href="_fast_i_o_8h.html#a04971fe5fabe4129736708c494e08e6d">ATOMIC_BLOCK</a>(<a class="code" href="_fast_i_o_8h.html#a362c18b15a09703e42e1c246c47420ef">ATOMIC_RESTORESTATE</a>)
<a name="l00120"></a>00120                         {
<a name="l00121"></a>00121                                 <span class="keywordflow">if</span>(value &amp; 1)
<a name="l00122"></a>00122             {
<a name="l00123"></a>00123                <a class="code" href="_fast_i_o_8h.html#a89e1c62276052100c62b6c82a2e95622">fio_digitalWrite_HIGH</a>(dataRegister, dataBit);
<a name="l00124"></a>00124                                 }
<a name="l00125"></a>00125             <span class="keywordflow">else</span>
<a name="l00126"></a>00126             {
<a name="l00127"></a>00127                <a class="code" href="_fast_i_o_8h.html#ac8f00a1bccb98109531b88fbb6e91478">fio_digitalWrite_LOW</a>(dataRegister, dataBit);
<a name="l00128"></a>00128             }
<a name="l00129"></a>00129             value &gt;&gt;= 1;
<a name="l00130"></a>00130                                 <a class="code" href="_fast_i_o_8h.html#a89e1c62276052100c62b6c82a2e95622">fio_digitalWrite_HIGH</a> (clockRegister, clockBit);
<a name="l00131"></a>00131                                 <a class="code" href="_fast_i_o_8h.html#ac8f00a1bccb98109531b88fbb6e91478">fio_digitalWrite_LOW</a> (clockRegister,clockBit);
<a name="l00132"></a>00132                         }
<a name="l00133"></a>00133                 }
<a name="l00134"></a>00134       
<a name="l00135"></a>00135         }
<a name="l00136"></a>00136         <span class="keywordflow">else</span>
<a name="l00137"></a>00137         {
<a name="l00138"></a>00138                 <span class="keywordflow">for</span>(i = 0; i &lt; 8; i++)
<a name="l00139"></a>00139                 {
<a name="l00140"></a>00140                         <a class="code" href="_fast_i_o_8h.html#a04971fe5fabe4129736708c494e08e6d">ATOMIC_BLOCK</a>(<a class="code" href="_fast_i_o_8h.html#a362c18b15a09703e42e1c246c47420ef">ATOMIC_RESTORESTATE</a>)
<a name="l00141"></a>00141                         {
<a name="l00142"></a>00142                                 <span class="keywordflow">if</span>(value &amp; 0x80)
<a name="l00143"></a>00143             {
<a name="l00144"></a>00144                <a class="code" href="_fast_i_o_8h.html#a89e1c62276052100c62b6c82a2e95622">fio_digitalWrite_HIGH</a>(dataRegister, dataBit);
<a name="l00145"></a>00145                                 }
<a name="l00146"></a>00146             <span class="keywordflow">else</span>
<a name="l00147"></a>00147             {
<a name="l00148"></a>00148                <a class="code" href="_fast_i_o_8h.html#ac8f00a1bccb98109531b88fbb6e91478">fio_digitalWrite_LOW</a>(dataRegister, dataBit);
<a name="l00149"></a>00149             }
<a name="l00150"></a>00150                                 value &lt;&lt;= 1;
<a name="l00151"></a>00151                                 <a class="code" href="_fast_i_o_8h.html#a89e1c62276052100c62b6c82a2e95622">fio_digitalWrite_HIGH</a> (clockRegister, clockBit);
<a name="l00152"></a>00152                                 <a class="code" href="_fast_i_o_8h.html#ac8f00a1bccb98109531b88fbb6e91478">fio_digitalWrite_LOW</a> (clockRegister,clockBit);
<a name="l00153"></a>00153                         }
<a name="l00154"></a>00154                 }
<a name="l00155"></a>00155         }
<a name="l00156"></a>00156 }
<a name="l00157"></a>00157 
<a name="l00158"></a>00158 
<a name="l00159"></a><a class="code" href="_fast_i_o_8h.html#a5d8d5977294d614d15bda19f75d6b787">00159</a> <span class="keywordtype">void</span> <a class="code" href="_fast_i_o_8cpp.html#a56c72b9f00680662229895ab22aaa743">fio_shiftOut</a>(<a class="code" href="_fast_i_o_8h.html#ae44ea3af54ef26db03f1ae2ea62f9c1f">fio_register</a> dataRegister, <a class="code" href="_fast_i_o_8h.html#a0a595a88b29bcfd1540b6fac75787937">fio_bit</a> dataBit, 
<a name="l00160"></a>00160                   <a class="code" href="_fast_i_o_8h.html#ae44ea3af54ef26db03f1ae2ea62f9c1f">fio_register</a> clockRegister, <a class="code" href="_fast_i_o_8h.html#a0a595a88b29bcfd1540b6fac75787937">fio_bit</a> clockBit)
<a name="l00161"></a>00161 {
<a name="l00162"></a>00162    <a class="code" href="_fast_i_o_8h.html#a04971fe5fabe4129736708c494e08e6d">ATOMIC_BLOCK</a>(<a class="code" href="_fast_i_o_8h.html#a362c18b15a09703e42e1c246c47420ef">ATOMIC_RESTORESTATE</a>)
<a name="l00163"></a>00163    {
<a name="l00164"></a>00164       <span class="comment">// shift out 0x0 (B00000000) fast, byte order is irrelevant</span>
<a name="l00165"></a>00165       <a class="code" href="_fast_i_o_8h.html#ac8f00a1bccb98109531b88fbb6e91478">fio_digitalWrite_LOW</a> (dataRegister, dataBit);
<a name="l00166"></a>00166       
<a name="l00167"></a>00167       <span class="keywordflow">for</span>(uint8_t i = 0; i&lt;8; ++i)
<a name="l00168"></a>00168       {
<a name="l00169"></a>00169          <a class="code" href="_fast_i_o_8h.html#a89e1c62276052100c62b6c82a2e95622">fio_digitalWrite_HIGH</a> (clockRegister, clockBit);
<a name="l00170"></a>00170          <a class="code" href="_fast_i_o_8h.html#a6d1dffed7f0c8f28f6c88146315f7832">fio_digitalWrite_SWITCH</a> (clockRegister, clockBit);
<a name="l00171"></a>00171       }
<a name="l00172"></a>00172    }
<a name="l00173"></a>00173 }
<a name="l00174"></a>00174 
<a name="l00175"></a>00175 
<a name="l00176"></a><a class="code" href="_fast_i_o_8h.html#ae4b2e099f8ade9ee674d1565669e870a">00176</a> <span class="keywordtype">void</span> <a class="code" href="_fast_i_o_8cpp.html#ae4b2e099f8ade9ee674d1565669e870a">fio_shiftOut1_init</a>(uint8_t pin)
<a name="l00177"></a>00177 {
<a name="l00178"></a>00178         <a class="code" href="_fast_i_o_8cpp.html#ae4b2e099f8ade9ee674d1565669e870a">fio_shiftOut1_init</a>(<a class="code" href="_fast_i_o_8cpp.html#a04210cc785c3b4a11c86f794949c327f">fio_pinToOutputRegister</a>(pin,HIGH),<a class="code" href="_fast_i_o_8cpp.html#a07a19dfbdca1afaca5d666bdaa3be7d5">fio_pinToBit</a>(pin));
<a name="l00179"></a>00179 }
<a name="l00180"></a>00180 
<a name="l00181"></a><a class="code" href="_fast_i_o_8h.html#a2d0e4495eb12504255bbd3f82405b17b">00181</a> <span class="keywordtype">void</span> <a class="code" href="_fast_i_o_8cpp.html#ae4b2e099f8ade9ee674d1565669e870a">fio_shiftOut1_init</a>(<a class="code" href="_fast_i_o_8h.html#ae44ea3af54ef26db03f1ae2ea62f9c1f">fio_register</a> shift1Register, <a class="code" href="_fast_i_o_8h.html#a0a595a88b29bcfd1540b6fac75787937">fio_bit</a> shift1Bit)
<a name="l00182"></a>00182 {
<a name="l00183"></a>00183         <span class="comment">// Make sure that capacitors are charged</span>
<a name="l00184"></a>00184         <span class="comment">// 300us is an educated guess...</span>
<a name="l00185"></a>00185         <a class="code" href="_fast_i_o_8cpp.html#ae91bbe682b02a5842c291055c0e998b5">fio_digitalWrite</a>(shift1Register,shift1Bit,HIGH);
<a name="l00186"></a>00186         delayMicroseconds(300);
<a name="l00187"></a>00187 }
<a name="l00188"></a>00188 
<a name="l00189"></a>00189 
<a name="l00190"></a><a class="code" href="_fast_i_o_8h.html#a33ce251dcd6b448185cda415a99001cf">00190</a> <span class="keywordtype">void</span> <a class="code" href="_fast_i_o_8cpp.html#a5b4d1684030dc620938b7c2fbdf5ced8">fio_shiftOut1</a>(<a class="code" href="_fast_i_o_8h.html#ae44ea3af54ef26db03f1ae2ea62f9c1f">fio_register</a> shift1Register, <a class="code" href="_fast_i_o_8h.html#a0a595a88b29bcfd1540b6fac75787937">fio_bit</a> shift1Bit, uint8_t value, 
<a name="l00191"></a>00191                    <span class="keywordtype">boolean</span> noLatch)
<a name="l00192"></a>00192 {
<a name="l00193"></a>00193         <span class="comment">/*</span>
<a name="l00194"></a>00194 <span class="comment">         * this function are based on Shif1 protocol developed by Roman Black </span>
<a name="l00195"></a>00195 <span class="comment">    *    (http://www.romanblack.com/shift1.htm)</span>
<a name="l00196"></a>00196 <span class="comment">         *</span>
<a name="l00197"></a>00197 <span class="comment">         * test sketches:</span>
<a name="l00198"></a>00198 <span class="comment">         *      http://pastebin.com/raw.php?i=2hnC9v2Z</span>
<a name="l00199"></a>00199 <span class="comment">         *      http://pastebin.com/raw.php?i=bGg4DhXQ</span>
<a name="l00200"></a>00200 <span class="comment">         *      http://pastebin.com/raw.php?i=tg1ZFiM5</span>
<a name="l00201"></a>00201 <span class="comment">         *    http://pastebin.com/raw.php?i=93ExPDD3 - cascading</span>
<a name="l00202"></a>00202 <span class="comment">         * tested with:</span>
<a name="l00203"></a>00203 <span class="comment">         *      TPIC6595N - seems to work fine (circuit: http://www.3guys1laser.com/</span>
<a name="l00204"></a>00204 <span class="comment">    *                   arduino-one-wire-shift-register-prototype)</span>
<a name="l00205"></a>00205 <span class="comment">         *      7HC595N</span>
<a name="l00206"></a>00206 <span class="comment">         */</span>
<a name="l00207"></a>00207    
<a name="l00208"></a>00208         <span class="comment">// iterate but ignore last bit (is it correct now?)</span>
<a name="l00209"></a>00209         <span class="keywordflow">for</span>(int8_t i = 7; i&gt;=0; --i)
<a name="l00210"></a>00210    {
<a name="l00211"></a>00211       
<a name="l00212"></a>00212                 <span class="comment">// assume that pin is HIGH (smokin&#39; pot all day... :) - requires </span>
<a name="l00213"></a>00213       <span class="comment">// initialization</span>
<a name="l00214"></a>00214                 <span class="keywordflow">if</span>(value &amp; _BV(i))
<a name="l00215"></a>00215       {
<a name="l00216"></a>00216          <a class="code" href="_fast_i_o_8h.html#a04971fe5fabe4129736708c494e08e6d">ATOMIC_BLOCK</a>(<a class="code" href="_fast_i_o_8h.html#a362c18b15a09703e42e1c246c47420ef">ATOMIC_RESTORESTATE</a>)
<a name="l00217"></a>00217          {
<a name="l00218"></a>00218             <span class="comment">// HIGH = 1 Bit</span>
<a name="l00219"></a>00219             <a class="code" href="_fast_i_o_8h.html#accae9687fdfc5f3492fb6344d62eb190">fio_digitalWrite_SWITCHTO</a>(shift1Register,shift1Bit,LOW);
<a name="l00220"></a>00220             <span class="comment">//hold pin LOW for 1us - done! :)</span>
<a name="l00221"></a>00221             <a class="code" href="_fast_i_o_8h.html#accae9687fdfc5f3492fb6344d62eb190">fio_digitalWrite_SWITCHTO</a>(shift1Register,shift1Bit,HIGH);
<a name="l00222"></a>00222          } <span class="comment">// end critical section</span>
<a name="l00223"></a>00223          <span class="comment">//hold pin HIGH for 15us</span>
<a name="l00224"></a>00224          delayMicroseconds(15);
<a name="l00225"></a>00225                 }
<a name="l00226"></a>00226       <span class="keywordflow">else</span>
<a name="l00227"></a>00227       {
<a name="l00228"></a>00228          <a class="code" href="_fast_i_o_8h.html#a04971fe5fabe4129736708c494e08e6d">ATOMIC_BLOCK</a>(<a class="code" href="_fast_i_o_8h.html#a362c18b15a09703e42e1c246c47420ef">ATOMIC_RESTORESTATE</a>)
<a name="l00229"></a>00229          {
<a name="l00230"></a>00230             <span class="comment">// LOW = 0 Bit</span>
<a name="l00231"></a>00231             <a class="code" href="_fast_i_o_8h.html#accae9687fdfc5f3492fb6344d62eb190">fio_digitalWrite_SWITCHTO</a>(shift1Register,shift1Bit,LOW);
<a name="l00232"></a>00232             <span class="comment">// hold pin LOW for 15us</span>
<a name="l00233"></a>00233             delayMicroseconds(15);
<a name="l00234"></a>00234             <a class="code" href="_fast_i_o_8h.html#accae9687fdfc5f3492fb6344d62eb190">fio_digitalWrite_SWITCHTO</a>(shift1Register,shift1Bit,HIGH);
<a name="l00235"></a>00235          } <span class="comment">// end critical section</span>
<a name="l00236"></a>00236          
<a name="l00237"></a>00237          <span class="comment">// hold pin HIGH for 30us</span>
<a name="l00238"></a>00238          delayMicroseconds(30);         
<a name="l00239"></a>00239                 }
<a name="l00240"></a>00240                 <span class="keywordflow">if</span>(!noLatch &amp;&amp; i==1)
<a name="l00241"></a>00241       {
<a name="l00242"></a>00242          <span class="keywordflow">break</span>;
<a name="l00243"></a>00243       }
<a name="l00244"></a>00244         }
<a name="l00245"></a>00245    
<a name="l00246"></a>00246         <span class="keywordflow">if</span>(!noLatch)
<a name="l00247"></a>00247    {
<a name="l00248"></a>00248       <a class="code" href="_fast_i_o_8h.html#a04971fe5fabe4129736708c494e08e6d">ATOMIC_BLOCK</a>(<a class="code" href="_fast_i_o_8h.html#a362c18b15a09703e42e1c246c47420ef">ATOMIC_RESTORESTATE</a>)
<a name="l00249"></a>00249       {
<a name="l00250"></a>00250          <span class="comment">// send last bit (=LOW) and Latch command</span>
<a name="l00251"></a>00251          <a class="code" href="_fast_i_o_8h.html#accae9687fdfc5f3492fb6344d62eb190">fio_digitalWrite_SWITCHTO</a>(shift1Register,shift1Bit,LOW);
<a name="l00252"></a>00252       } <span class="comment">// end critical section</span>
<a name="l00253"></a>00253       delayMicroseconds(199);           <span class="comment">// Hold pin low for 200us</span>
<a name="l00254"></a>00254       
<a name="l00255"></a>00255       <a class="code" href="_fast_i_o_8h.html#a04971fe5fabe4129736708c494e08e6d">ATOMIC_BLOCK</a>(<a class="code" href="_fast_i_o_8h.html#a362c18b15a09703e42e1c246c47420ef">ATOMIC_RESTORESTATE</a>)
<a name="l00256"></a>00256       {
<a name="l00257"></a>00257          <a class="code" href="_fast_i_o_8h.html#a89e1c62276052100c62b6c82a2e95622">fio_digitalWrite_HIGH</a>(shift1Register,shift1Bit);
<a name="l00258"></a>00258       } <span class="comment">// end critical section</span>
<a name="l00259"></a>00259                 delayMicroseconds(299);   <span class="comment">// Hold pin high for 300us and leave it that </span>
<a name="l00260"></a>00260       <span class="comment">// way - using explicit HIGH here, just in case.</span>
<a name="l00261"></a>00261         }
<a name="l00262"></a>00262 }
<a name="l00263"></a>00263 
<a name="l00264"></a><a class="code" href="_fast_i_o_8h.html#af2aac35d9a8ab7a2c87672f2c7cbbafb">00264</a> <span class="keywordtype">void</span> <a class="code" href="_fast_i_o_8cpp.html#a5b4d1684030dc620938b7c2fbdf5ced8">fio_shiftOut1</a>(uint8_t pin, uint8_t value, <span class="keywordtype">boolean</span> noLatch)
<a name="l00265"></a>00265 {
<a name="l00266"></a>00266         <a class="code" href="_fast_i_o_8cpp.html#a5b4d1684030dc620938b7c2fbdf5ced8">fio_shiftOut1</a>(<a class="code" href="_fast_i_o_8cpp.html#a04210cc785c3b4a11c86f794949c327f">fio_pinToOutputRegister</a>(pin, <a class="code" href="_fast_i_o_8h.html#a688a4adbb87520a2b68681bd6bfb199e">SKIP</a>),<a class="code" href="_fast_i_o_8cpp.html#a07a19dfbdca1afaca5d666bdaa3be7d5">fio_pinToBit</a>(pin),value, noLatch);
<a name="l00267"></a>00267 }
</pre></div></div>
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