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nrf24_specan_8pde-example.html

nrf24_specan_8pde-example.html 6.5 KB
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  7. <title>NRF24: nrf24_specan.pde</title>
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  20.    <div id="projectname">NRF24
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  31.       <li><a href="index.html"><span>Main&#160;Page</span></a></li>
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  34.       <li><a href="examples.html"><span>Examples</span></a></li>
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    40. 

  40. <div class="title">nrf24_specan.pde</div>  </div>
    41. 

  41. </div><!--header-->
    42. 

  42. <div class="contents">
    43. 

  43. <p>Example sketch showing how to create a primitive spectrum analyser with the <a class="el" href="classNRF24.html" title="Send and receive addressed, reliable, acknowledged datagrams by nRF24L01. ">NRF24</a> class. The nRF24L01 received power detector is only one bit, but this will show which channels have more than -64dBm present</p>
    44. 

  44. <div class="fragment"><div class="line"><span class="comment">// nrf24_specan.pde</span></div>
    45. 

  45. <div class="line"><span class="comment">// -*- mode: C++ -*-</span></div>
    46. 

  46. <div class="line"><span class="comment">// Example sketch showing how to create a primitive spectrum analyser</span></div>
    47. 

  47. <div class="line"><span class="comment">// with the NRF24 class. </span></div>
    48. 

  48. <div class="line"><span class="comment">// The nRF24L01 received power detector is only one bit, but</span></div>
    49. 

  49. <div class="line"><span class="comment">// this will show which channels have more than -64dBm present</span></div>
    50. 

  50. <div class="line"></div>
    51. 

  51. <div class="line"><span class="preprocessor">#include &lt;NRF24.h&gt;</span></div>
    52. 

  52. <div class="line"><span class="preprocessor">#include &lt;SPI.h&gt;</span></div>
    53. 

  53. <div class="line"></div>
    54. 

  54. <div class="line"></div>
    55. 

  55. <div class="line"><span class="comment">// Singleton instance of the radio</span></div>
    56. 

  56. <div class="line"><a name="_a0"></a><a class="code" href="classNRF24.html">NRF24</a> nrf24;</div>
    57. 

  57. <div class="line"><span class="comment">// NRF24 nrf24(8, 7); // use this to be electrically compatible with Mirf</span></div>
    58. 

  58. <div class="line"><span class="comment">// NRF24 nrf24(8, 10);// For Leonardo, need explicit SS pin</span></div>
    59. 

  59. <div class="line"></div>
    60. 

  60. <div class="line"><span class="keywordtype">void</span> setup() </div>
    61. 

  61. <div class="line">{</div>
    62. 

  62. <div class="line">  Serial.begin(9600);</div>
    63. 

  63. <div class="line">  <span class="keywordflow">while</span> (!Serial)</div>
    64. 

  64. <div class="line">        ; <span class="comment">// wait for serial port to connect. Needed for Leonardo only</span></div>
    65. 

  65. <div class="line">  <span class="keywordflow">if</span> (!nrf24.<a name="a1"></a><a class="code" href="classNRF24.html#a6e98cf508939240c1805245170a995f6">init</a>())</div>
    66. 

  66. <div class="line">    Serial.println(<span class="stringliteral">&quot;NRF24 init failed&quot;</span>);</div>
    67. 

  67. <div class="line">  <span class="comment">// Narrow the receiver bandwidth</span></div>
    68. 

  68. <div class="line">  <span class="keywordflow">if</span> (!nrf24.<a name="a2"></a><a class="code" href="classNRF24.html#a3453db8390d5be4aa99d8c7fde3062a4">setRF</a>(<a name="a3"></a><a class="code" href="classNRF24.html#a52d7af9188397d4a6f5dab55d4f04742ae4523002495ee537f2731b61a220e3af">NRF24::NRF24DataRate250kbps</a>, <a name="a4"></a><a class="code" href="classNRF24.html#a8386e81a9a4b824ab26e785879684c7ea4790420d436218aa3bf4c23687664853">NRF24::NRF24TransmitPowerm18dBm</a>))</div>
    69. 

  69. <div class="line">    Serial.println(<span class="stringliteral">&quot;setRF failed&quot;</span>);    </div>
    70. 

  70. <div class="line"></div>
    71. 

  71. <div class="line">  <span class="comment">// Start the receiver</span></div>
    72. 

  72. <div class="line">  <span class="keywordflow">if</span> (!nrf24.<a name="a5"></a><a class="code" href="classNRF24.html#a9e15babbfa487da3425b19c60a93c057">powerUpRx</a>())</div>
    73. 

  73. <div class="line">    Serial.println(<span class="stringliteral">&quot;powerUpRx failed&quot;</span>);</div>
    74. 

  74. <div class="line"></div>
    75. 

  75. <div class="line">  Serial.println(<span class="stringliteral">&quot;initialised&quot;</span>);</div>
    76. 

  76. <div class="line">}</div>
    77. 

  77. <div class="line"></div>
    78. 

  78. <div class="line"><span class="comment">// Here we only scan the first 50 channels</span></div>
    79. 

  79. <div class="line"><span class="keywordtype">void</span> loop()</div>
    80. 

  80. <div class="line">{</div>
    81. 

  81. <div class="line">  uint8_t i;</div>
    82. 

  82. <div class="line">  <span class="keywordflow">for</span> (i = 0; i &lt; 50; i++)</div>
    83. 

  83. <div class="line">  {</div>
    84. 

  84. <div class="line">      <span class="keywordflow">if</span> (!nrf24.<a name="a6"></a><a class="code" href="classNRF24.html#a3fa90005f98eb2744a533899f9b7e023">setChannel</a>(i))</div>
    85. 

  85. <div class="line">        Serial.println(<span class="stringliteral">&quot;setChannel failed&quot;</span>);</div>
    86. 

  86. <div class="line">      delay(1); <span class="comment">// need at least 170microsecs</span></div>
    87. 

  87. <div class="line">      uint8_t rpd = nrf24.<a name="a7"></a><a class="code" href="classNRF24.html#a264f427858362e106705d92152bc634e">spiReadRegister</a>(NRF24_REG_09_RPD); <span class="comment">// 1 bit only :-(</span></div>
    88. 

  88. <div class="line">      Serial.print(i, DEC);</div>
    89. 

  89. <div class="line">      Serial.print(<span class="stringliteral">&quot;: &quot;</span>);</div>
    90. 

  90. <div class="line">      Serial.println(rpd);</div>
    91. 

  91. <div class="line">  }</div>
    92. 

  92. <div class="line">  Serial.println(<span class="stringliteral">&quot;-------------------------&quot;</span>);</div>
    93. 

  93. <div class="line">  delay(1000);</div>
    94. 

  94. <div class="line">}</div>
    95. 

  95. <div class="line"></div>
    96. 

  96. </div><!-- fragment --> </div><!-- contents -->
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