a2d_8h-source.html

avr应用测试程序

00076 <span class="comment"></span>// these channels supported only in ATmega128
00077 <span class="comment">// differential with gain</span>
00078 <span class="preprocessor">#define ADC_CH_0_0_DIFF10X      0x08</span>
00079 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_1_0_DIFF10X      0x09</span>
00080 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_0_0_DIFF200X     0x0A</span>
00081 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_1_0_DIFF200X     0x0B</span>
00082 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_2_2_DIFF10X      0x0C</span>
00083 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_3_2_DIFF10X      0x0D</span>
00084 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_2_2_DIFF200X     0x0E</span>
00085 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_3_2_DIFF200X     0x0F</span>
00086 <span class="preprocessor"></span><span class="comment">// differential</span>
00087 <span class="preprocessor">#define ADC_CH_0_1_DIFF1X       0x10</span>
00088 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_1_1_DIFF1X       0x11</span>
00089 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_2_1_DIFF1X       0x12</span>
00090 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_3_1_DIFF1X       0x13</span>
00091 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_4_1_DIFF1X       0x14</span>
00092 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_5_1_DIFF1X       0x15</span>
00093 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_6_1_DIFF1X       0x16</span>
00094 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_7_1_DIFF1X       0x17</span>
00095 <span class="preprocessor"></span>
00096 <span class="preprocessor">#define ADC_CH_0_2_DIFF1X       0x18</span>
00097 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_1_2_DIFF1X       0x19</span>
00098 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_2_2_DIFF1X       0x1A</span>
00099 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_3_2_DIFF1X       0x1B</span>
00100 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_4_2_DIFF1X       0x1C</span>
00101 <span class="preprocessor"></span><span class="preprocessor">#define ADC_CH_5_2_DIFF1X       0x1D</span>
00102 <span class="preprocessor"></span>
00103 <span class="comment">// compatibility for new Mega processors</span>
00104 <span class="comment">// ADCSR hack apparently no longer necessary in new AVR-GCC</span>
00105 <span class="preprocessor">#ifdef ADCSRA</span>
00106 <span class="preprocessor"></span><span class="preprocessor">#ifndef ADCSR</span>
00107 <span class="preprocessor"></span><span class="preprocessor">    #define ADCSR   ADCSRA</span>
00108 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
00109 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
00110 <span class="preprocessor"></span><span class="preprocessor">#ifdef ADATE</span>
00111 <span class="preprocessor"></span><span class="preprocessor">    #define ADFR    ADATE</span>
00112 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
00113 <span class="preprocessor"></span>
00114 <span class="comment">// function prototypes</span>
00115 <span class="comment"></span>
00116 <span class="comment">//! Initializes the A/D converter.</span>
00117 <span class="comment">/// Turns ADC on and prepares it for use.</span>
00118 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="group__a2d.html#ga0">a2dInit</a>(<span class="keywordtype">void</span>);
00119 <span class="comment"></span>
00120 <span class="comment">//! Turn off A/D converter</span>
00121 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="group__a2d.html#ga1">a2dOff</a>(<span class="keywordtype">void</span>);
00122 <span class="comment"></span>
00123 <span class="comment">//! Sets the division ratio of the A/D converter clock.</span>
00124 <span class="comment">/// This function is automatically called from a2dInit()</span>
00125 <span class="comment">/// with a default value.</span>
00126 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="group__a2d.html#ga2">a2dSetPrescaler</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> prescale);
00127 <span class="comment"></span>
00128 <span class="comment">//! Configures which voltage reference the A/D converter uses.</span>
00129 <span class="comment">/// This function is automatically called from a2dInit()</span>
00130 <span class="comment">/// with a default value.</span>
00131 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="group__a2d.html#ga3">a2dSetReference</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ref);
00132 <span class="comment"></span>
00133 <span class="comment">//! sets the a2d input channel</span>
00134 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="group__a2d.html#ga4">a2dSetChannel</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ch);
00135 <span class="comment"></span>
00136 <span class="comment">//! start a conversion on the current a2d input channel</span>
00137 <span class="comment"></span><span class="keywordtype">void</span> <a class="code" href="group__a2d.html#ga5">a2dStartConvert</a>(<span class="keywordtype">void</span>);
00138 <span class="comment"></span>
00139 <span class="comment">//! return TRUE if conversion is complete</span>
00140 <span class="comment"></span>u08 <a class="code" href="group__a2d.html#ga6">a2dIsComplete</a>(<span class="keywordtype">void</span>);
00141 <span class="comment"></span>
00142 <span class="comment">//! Starts a conversion on A/D channel# ch,</span>
00143 <span class="comment">/// returns the 10-bit value of the conversion when it is finished.</span>
00144 <span class="comment"></span><span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> <a class="code" href="group__a2d.html#ga7">a2dConvert10bit</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ch);
00145 <span class="comment"></span>
00146 <span class="comment">//! Starts a conversion on A/D channel# ch,</span>
00147 <span class="comment">/// returns the 8-bit value of the conversion when it is finished.</span>
00148 <span class="comment"></span><span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <a class="code" href="group__a2d.html#ga8">a2dConvert8bit</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ch);
00149 
00150 <span class="preprocessor">#endif</span>
00151 <span class="preprocessor"></span><span class="comment">//@}</span>
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