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→26pin SPI test
<ol style="list-style-type: lower-alpha;">
<li><p>First run '''orangepi-config''', normal users remember to add > '''sudo''' permission</p>
{| class="wikitable" style="width:800px;" |-| <p>orangepi@orangepi:~$ '''sudo orangepi-config'''</p>|}</li>
<li><p>Then select '''System'''</p>
<p>[[File:media/image85.png|398x194px]]</p></li>
</li>
<li><p>Then check whether there is a '''spidev1.1''' device node in the Linux system. If it exists, it means that the configuration of SPI1 has taken effect</p>
{| class="wikitable" style="width:800px;"
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<p>orangepi@orangepi:~$ '''ls /dev/spidev1*'''</p>
<p>/dev/spidev1.1</p>|}</li>
<li><p>Do not short-circuit the mosi and miso pins of SPI1 first, the output result of running spidev_test is as follows, you can see that the data of TX and RX are inconsistent</p>
{| class="wikitable" style="width:800px;"
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<p>orangepi@orangepi:~$ '''sudo spidev_test -v -D /dev/spidev1.1'''</p>
<p>spi mode: 0x0</p>
<p>bits per word: 8</p>
<p>max speed: 500000 Hz (500 KHz)</p>
<p>TX | FF FF FF FF FF FF '''<span style="color:#FF0000">40 00 00 00 00 95</span>''' FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D | ......@.…▒..................▒.</p><p>RX | FF FF FF FF FF FF '''<span style="color:#FF0000">FF FF FF FF FF FF</span>''' FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF | ............................….</p>|}</li>
<li><p>Then short the two pins of mosi (the 19th pin in the 26pin interface) and miso (the 21st pin in the 26pin interface) of SPI1, and then run the output of spidev_test as follows, you can see the sending and receiving same data</p>
{| class="wikitable" style="width:800px;"
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<p>orangepi@orangepi:~$ '''sudo spidev_test -v -D /dev/spidev1.1'''</p>
<p>spi mode: 0x0</p>
<p>bits per word: 8</p>
<p>max speed: 500000 Hz (500 KHz)</p>
<p>TX | FF FF FF FF FF FF '''<span style="color:#FF0000">40 00 00 00 00 95</span>''' FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D | ......@.…▒..................▒.</p><p>RX | FF FF FF FF FF FF '''<span style="color:#FF0000">40 00 00 00 00 95</span>''' FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D | ......@.…▒..................▒.</p>|}</li></ol>
<span id="pin-i2c-test"></span>
=== 26pin I2C test ===
