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  84 <!-- ======== START OF CLASS DATA ======== -->
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  87 lejos.nxt</FONT>
  88 <BR>
  89 Class LightSensor</H2>
  90 <PRE>
  91 <A HREF="../../java/lang/Object.html" title="class in java.lang">java.lang.Object</A>
  92   <IMG SRC="../../resources/inherit.gif" ALT="extended by "><B>lejos.nxt.LightSensor</B>
  93 </PRE>
  94 <DL>
  95 <DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../lejos/nxt/SensorConstants.html" title="interface in lejos.nxt">SensorConstants</A></DD>
  96 </DL>
  97 <HR>
  98 <DL>
  99 <DT><PRE>public class <B>LightSensor</B><DT>extends <A HREF="../../java/lang/Object.html" title="class in java.lang">Object</A><DT>implements <A HREF="../../lejos/nxt/SensorConstants.html" title="interface in lejos.nxt">SensorConstants</A></DL>
 100 </PRE>
 101
 102 <P>
 103 Abstraction for a NXT light sensor.
 104  The light sensor can be calibrated to low and high values.
 105 <P>
 106
 107 <P>
 108 <HR>
 109
 110 <P>
 111 <!-- =========== FIELD SUMMARY =========== -->
 112
 113 <A NAME="field_summary"><!-- --></A>
 114 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
 115 <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
 116 <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
 117 <B>Field Summary</B></FONT></TH>
 118 </TR>
 119 </TABLE>
 120 &nbsp;<A NAME="fields_inherited_from_class_lejos.nxt.SensorConstants"><!-- --></A>
 121 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
 122 <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
 123 <TH ALIGN="left"><B>Fields inherited from interface lejos.nxt.<A HREF="../../lejos/nxt/SensorConstants.html" title="interface in lejos.nxt">SensorConstants</A></B></TH>
 124 </TR>
 125 <TR BGCOLOR="white" CLASS="TableRowColor">
 126 <TD><CODE><A HREF="../../lejos/nxt/SensorConstants.html#MODE_ANGLESTEP">MODE_ANGLESTEP</A>, <A HREF="../../lejos/nxt/SensorConstants.html#MODE_BOOLEAN">MODE_BOOLEAN</A>, <A HREF="../../lejos/nxt/SensorConstants.html#MODE_CELSIUS">MODE_CELSIUS</A>, <A HREF="../../lejos/nxt/SensorConstants.html#MODE_FARENHEIT">MODE_FARENHEIT</A>, <A HREF="../../lejos/nxt/SensorConstants.html#MODE_PCTFULLSCALE">MODE_PCTFULLSCALE</A>, <A HREF="../../lejos/nxt/SensorConstants.html#MODE_PERIODCOUNTER">MODE_PERIODCOUNTER</A>, <A HREF="../../lejos/nxt/SensorConstants.html#MODE_RAW">MODE_RAW</A>, <A HREF="../../lejos/nxt/SensorConstants.html#MODE_TRANSITIONCNT">MODE_TRANSITIONCNT</A>, <A HREF="../../lejos/nxt/SensorConstants.html#TYPE_ANGLE">TYPE_ANGLE</A>, <A HREF="../../lejos/nxt/SensorConstants.html#TYPE_CUSTOM">TYPE_CUSTOM</A>, <A HREF="../../lejos/nxt/SensorConstants.html#TYPE_LIGHT_ACTIVE">TYPE_LIGHT_ACTIVE</A>, <A HREF="../../lejos/nxt/SensorConstants.html#TYPE_LIGHT_INACTIVE">TYPE_LIGHT_INACTIVE</A>, <A HREF="../../lejos/nxt/SensorConstants.html#TYPE_LOWSPEED">TYPE_LOWSPEED</A>, <A HREF="../../lejos/nxt/SensorConstants.html#TYPE_LOWSPEED_9V">TYPE_LOWSPEED_9V</A>, <A HREF="../../lejos/nxt/SensorConstants.html#TYPE_NO_SENSOR">TYPE_NO_SENSOR</A>, <A HREF="../../lejos/nxt/SensorConstants.html#TYPE_REFLECTION">TYPE_REFLECTION</A>, <A HREF="../../lejos/nxt/SensorConstants.html#TYPE_SOUND_DB">TYPE_SOUND_DB</A>, <A HREF="../../lejos/nxt/SensorConstants.html#TYPE_SOUND_DBA">TYPE_SOUND_DBA</A>, <A HREF="../../lejos/nxt/SensorConstants.html#TYPE_SWITCH">TYPE_SWITCH</A>, <A HREF="../../lejos/nxt/SensorConstants.html#TYPE_TEMPERATURE">TYPE_TEMPERATURE</A></CODE></TD>
 127 </TR>
 128 </TABLE>
 129 &nbsp;
 130 <!-- ======== CONSTRUCTOR SUMMARY ======== -->
 131
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 135 <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
 136 <B>Constructor Summary</B></FONT></TH>
 137 </TR>
 138 <TR BGCOLOR="white" CLASS="TableRowColor">
 139 <TD><CODE><B><A HREF="../../lejos/nxt/LightSensor.html#LightSensor(lejos.nxt.ADSensorPort)">LightSensor</A></B>(lejos.nxt.ADSensorPort&nbsp;port)</CODE>
 140
 141 <BR>
 142 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Create a light sensor object attached to the specified port.</TD>
 143 </TR>
 144 <TR BGCOLOR="white" CLASS="TableRowColor">
 145 <TD><CODE><B><A HREF="../../lejos/nxt/LightSensor.html#LightSensor(lejos.nxt.ADSensorPort, boolean)">LightSensor</A></B>(lejos.nxt.ADSensorPort&nbsp;port,
 146             boolean&nbsp;floodlight)</CODE>
 147
 148 <BR>
 149 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Create a light sensor object attached to the specified port,
 150  and sets floodlighting on or off.</TD>
 151 </TR>
 152 </TABLE>
 153 &nbsp;
 154 <!-- ========== METHOD SUMMARY =========== -->
 155
 156 <A NAME="method_summary"><!-- --></A>
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 160 <B>Method Summary</B></FONT></TH>
 161 </TR>
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 163 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
 164 <CODE>&nbsp;void</CODE></FONT></TD>
 165 <TD><CODE><B><A HREF="../../lejos/nxt/LightSensor.html#calibrateHigh()">calibrateHigh</A></B>()</CODE>
 166
 167 <BR>
 168 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;call this method whtn the light sensor is reading the high value - used by reaeValue</TD>
 169 </TR>
 170 <TR BGCOLOR="white" CLASS="TableRowColor">
 171 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
 172 <CODE>&nbsp;void</CODE></FONT></TD>
 173 <TD><CODE><B><A HREF="../../lejos/nxt/LightSensor.html#calibrateLow()">calibrateLow</A></B>()</CODE>
 174
 175 <BR>
 176 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;call this method when the light sensor is reading the low value - used by readValue</TD>
 177 </TR>
 178 <TR BGCOLOR="white" CLASS="TableRowColor">
 179 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
 180 <CODE>&nbsp;int</CODE></FONT></TD>
 181 <TD><CODE><B><A HREF="../../lejos/nxt/LightSensor.html#readNormalizedValue()">readNormalizedValue</A></B>()</CODE>
 182
 183 <BR>
 184 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Read the current sensor normalized value.</TD>
 185 </TR>
 186 <TR BGCOLOR="white" CLASS="TableRowColor">
 187 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
 188 <CODE>&nbsp;int</CODE></FONT></TD>
 189 <TD><CODE><B><A HREF="../../lejos/nxt/LightSensor.html#readValue()">readValue</A></B>()</CODE>
 190
 191 <BR>
 192 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Read the current sensor value.</TD>
 193 </TR>
 194 <TR BGCOLOR="white" CLASS="TableRowColor">
 195 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
 196 <CODE>&nbsp;void</CODE></FONT></TD>
 197 <TD><CODE><B><A HREF="../../lejos/nxt/LightSensor.html#setFloodlight(boolean)">setFloodlight</A></B>(boolean&nbsp;floodlight)</CODE>
 198
 199 <BR>
 200 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Set floodlighting on or off.</TD>
 201 </TR>
 202 </TABLE>
 203 &nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
 204 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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 210 </TR>
 211 </TABLE>
 212 &nbsp;
 213 <P>
 214
 215 <!-- ========= CONSTRUCTOR DETAIL ======== -->
 216
 217 <A NAME="constructor_detail"><!-- --></A>
 218 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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 220 <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
 221 <B>Constructor Detail</B></FONT></TH>
 222 </TR>
 223 </TABLE>
 224
 225 <A NAME="LightSensor(lejos.nxt.ADSensorPort)"><!-- --></A><H3>
 226 LightSensor</H3>
 227 <PRE>
 228 public <B>LightSensor</B>(lejos.nxt.ADSensorPort&nbsp;port)</PRE>
 229 <DL>
 230 <DD>Create a light sensor object attached to the specified port.
 231  The sensor will be set to floodlit mode, i.e. the LED will be turned on.
 232 <P>
 233 <DL>
 234 <DT><B>Parameters:</B><DD><CODE>port</CODE> - port, e.g. Port.S1</DL>
 235 </DL>
 236 <HR>
 237
 238 <A NAME="LightSensor(lejos.nxt.ADSensorPort, boolean)"><!-- --></A><H3>
 239 LightSensor</H3>
 240 <PRE>
 241 public <B>LightSensor</B>(lejos.nxt.ADSensorPort&nbsp;port,
 242                    boolean&nbsp;floodlight)</PRE>
 243 <DL>
 244 <DD>Create a light sensor object attached to the specified port,
 245  and sets floodlighting on or off.
 246 <P>
 247 <DL>
 248 <DT><B>Parameters:</B><DD><CODE>port</CODE> - port, e.g. Port.S1<DD><CODE>floodlight</CODE> - true to set floodit mode, false for ambient light.</DL>
 249 </DL>
 250
 251 <!-- ============ METHOD DETAIL ========== -->
 252
 253 <A NAME="method_detail"><!-- --></A>
 254 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
 255 <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
 256 <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
 257 <B>Method Detail</B></FONT></TH>
 258 </TR>
 259 </TABLE>
 260
 261 <A NAME="setFloodlight(boolean)"><!-- --></A><H3>
 262 setFloodlight</H3>
 263 <PRE>
 264 public void <B>setFloodlight</B>(boolean&nbsp;floodlight)</PRE>
 265 <DL>
 266 <DD>Set floodlighting on or off.
 267 <P>
 268 <DD><DL>
 269 </DL>
 270 </DD>
 271 <DD><DL>
 272 <DT><B>Parameters:</B><DD><CODE>floodlight</CODE> - true to set floodit mode, false for ambient light.</DL>
 273 </DD>
 274 </DL>
 275 <HR>
 276
 277 <A NAME="readValue()"><!-- --></A><H3>
 278 readValue</H3>
 279 <PRE>
 280 public int <B>readValue</B>()</PRE>
 281 <DL>
 282 <DD>Read the current sensor value.
 283  Use calibrateLow() to set the zero level, and calibrateHigh to set the 100 level.
 284 <P>
 285 <DD><DL>
 286 </DL>
 287 </DD>
 288 <DD><DL>
 289
 290 <DT><B>Returns:</B><DD>Value as a percentage of difference between the low and high calibration values.</DL>
 291 </DD>
 292 </DL>
 293 <HR>
 294
 295 <A NAME="readNormalizedValue()"><!-- --></A><H3>
 296 readNormalizedValue</H3>
 297 <PRE>
 298 public int <B>readNormalizedValue</B>()</PRE>
 299 <DL>
 300 <DD>Read the current sensor normalized value. Allows more accuracy
 301  than readValue(). For LEGO sensor, values typically range from
 302  145 (dark) to 890 (sunlight).
 303 <P>
 304 <DD><DL>
 305 </DL>
 306 </DD>
 307 <DD><DL>
 308
 309 <DT><B>Returns:</B><DD>Value as raw normalized (0 to 1023)</DL>
 310 </DD>
 311 </DL>
 312 <HR>
 313
 314 <A NAME="calibrateLow()"><!-- --></A><H3>
 315 calibrateLow</H3>
 316 <PRE>
 317 public void <B>calibrateLow</B>()</PRE>
 318 <DL>
 319 <DD>call this method when the light sensor is reading the low value - used by readValue
 320 <P>
 321 <DD><DL>
 322 </DL>
 323 </DD>
 324 <DD><DL>
 325 </DL>
 326 </DD>
 327 </DL>
 328 <HR>
 329
 330 <A NAME="calibrateHigh()"><!-- --></A><H3>
 331 calibrateHigh</H3>
 332 <PRE>
 333 public void <B>calibrateHigh</B>()</PRE>
 334 <DL>
 335 <DD>call this method whtn the light sensor is reading the high value - used by reaeValue
 336 <P>
 337 <DD><DL>
 338 </DL>
 339 </DD>
 340 <DD><DL>
 341 </DL>
 342 </DD>
 343 </DL>
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