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→40pin SPI Test
::[[File:pi3b-img264-1.png]]
<ol start="1" style="list-style-type:decimal;"><li><p>In the linux system, the SPI in the 40 pin is closed by default, and it needs to be opened manually before it can be used. The detailed steps are as follows:</p><ol style="list-style-type: lower-alpha;"><li><p>First run '''orangepi-config''', normal users remember to add sudo permission</p>{| class="wikitable" style="background-color:#ffffdc;width:800px;"
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<bigp>'''In the Linux system, the SPI3 in 40pin is closed by default, and it needs to be opened manually to use.''' '''Add the configuration of the red font part below to the /boot/orangepiEnv.txt, and then restart the Linux system to open the spi3.''' orangepi@orangepi:~$ '''sudo vim /boot/orangepiEnv.txt''' '''<span style="color:#FF0000">overlays=spi3-m0orangepi-cs0-spidev</span>config'''</bigp>
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</li>
<li><p>Then select '''System'''</p>
<p>[[File:pi3b-1.png]]</p>
</li>
<li><p>Then select '''Hardware'''</p>
<p>[[File:pi3b-2.png]]</p>
</li>
<li><p>Then use the arrow keys on the keyboard to navigate to the position shown in the figure below, and then use the '''space''' to select the SPI configuration you want to open</p>
<p>[[File:pi3b-3.png]]</p>
</li>
<li><p>Then select '''<Save>''' to save</p>
<p>[[File:pi3b-4.png]]</p>
</li>
<li><p>Then select '''<Back>'''</p>
<p>[[File:pi3b-5.png]]</p>
</li>
<li><p>Then select '''<Reboot>''' to restart the system to make the configuration take effect</p>
<p>[[File:pi3b-6.png]]</p>
</li>
</ol>
</li></ol>
<ol start="2" style="list-style-type: decimal;">
