https://wiki3.micromint.com/index.php?action=history&feed=atom&title=Electrum_Kernel_SPI_ADC_Driver 2026-04-11T17:03:15Z Revision history for this page on the wiki MediaWiki 1.15.3 https://wiki3.micromint.com/index.php?title=Electrum_Kernel_SPI_ADC_Driver&diff=1953&oldid=prev 2011-11-14T13:47:53Z

<p><span class="autocomment">Kernel SPI ADC driver</span></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 13:47, 14 November 2011</td> </tr> <tr><td colspan="2" class="diff-lineno">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>=Kernel SPI ADC driver=</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>=Kernel SPI ADC driver=</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>* [http://www.micromint.com/updates/electrum/adc128s052.zip adc128s052.zip]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>* [http://www.micromint.com/updates/electrum/adc128s052.zip adc128s052.zip] <ins class="diffchange diffchange-inline">Updated: Nov-2011</ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Contributed by: Christian Saether</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Contributed by: Christian Saether</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <!-- diff generator: internal 2026-04-11 17:03:16 --> </table>

Support https://wiki3.micromint.com/index.php?title=Electrum_Kernel_SPI_ADC_Driver&diff=1493&oldid=prev 2011-02-02T23:02:46Z

<p></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 23:02, 2 February 2011</td> </tr> <tr><td colspan="2" class="diff-lineno">Line 1:</td> <td colspan="2" class="diff-lineno">Line 1:</td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>=Kernel SPI ADC driver <del class="diffchange diffchange-inline">by Christian Saether</del>=</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>=Kernel SPI ADC driver=</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.micromint.com/updates/electrum/adc128s052.zip adc128s052.zip]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>* [http://www.micromint.com/updates/electrum/adc128s052.zip adc128s052.zip]</div></td></tr> <tr><td colspan="2">&nbsp;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">Contributed by: Christian Saether</ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>This driver is an spi protocol driver for the adc128s052 a/d chip option on the Micromint Electrum 100 SBC.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>This driver is an spi protocol driver for the adc128s052 a/d chip option on the Micromint Electrum 100 SBC.</div></td></tr> <!-- diff generator: internal 2026-04-11 17:03:16 --> </table>

Support https://wiki3.micromint.com/index.php?title=Electrum_Kernel_SPI_ADC_Driver&diff=1491&oldid=prev 2011-02-02T18:13:27Z

<p>Created page with &#39;=Kernel SPI ADC driver by Christian Saether= * [http://www.micromint.com/updates/electrum/adc128s052.zip adc128s052.zip] This driver is an spi protocol driver for the adc128s05…&#39;</p> <p><b>New page</b></p><div>=Kernel SPI ADC driver by Christian Saether=<br /> <br /> * [http://www.micromint.com/updates/electrum/adc128s052.zip adc128s052.zip]<br /> <br /> This driver is an spi protocol driver for the adc128s052 a/d chip option on the Micromint Electrum 100 SBC.<br /> It is meant to be built as a loadable driver.<br /> It allocates a megabyte internal buffer (about a second's worth of samples) when loaded. It is controlled by writing to its file system device. <br /> <br /> The commands are:<br /> <br /> &quot;r&quot; - run<br /> &quot;s&quot; - stop<br /> &quot;cddd...&quot; - one or more &quot;d&quot; specifying channel rotation<br /> <br /> It will send a message to sample each of the specified channels 16 times in rotation.<br /> Channel zero is always included. The numbers of channels must be 1, 2, 4, or 8.<br /> <br /> For example, if the device is &quot;/dev/adc0&quot; then the following shell command<br /> <br /> echo c0123 &gt; /dev/adc0<br /> <br /> will enable sampling for channels 0, 1, 2, and 3. The device must be stopped when this is issued. To start sampling, do<br /> <br /> echo r &gt; /dev/adc0<br /> <br /> At this point, the data samples will be returned by doing a read on /dev/adc0. They are returned as a series of 16 bit values in the channel rotation specified.<br /> <br /> Using od to display them, for example:<br /> <br /> od -sAn -w8 /dev/adc0<br /> 8172 8174 1 268<br /> 8174 8181 1 270<br /> 8172 8181 2 266<br /> 8176 8173 0 263<br /> 8172 8172 2 268<br /> 8172 8179 2 265<br /> 8169 8177 2 269<br /> 8175 8180 1 264<br /> <br /> Reading from minor device numbers other than zero will average samples by 2 raised to the minor number, so reading minor device number 1 returns the average of every 2 samples, minor 2 every 4 samples, up to minor 4 (avg every 16). Values from the a/d are shifted left 2 (multiplied by 4) as the lower bits will have some value when multiple samples are averaged.</div>

Support