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→40 pin I2C test
<li><p>As can be seen from the table below, the available i2c for Orange Pi 5 Plus is i2c2, i2c4, i2c5 and i2c8, a total of four sets of i2c buses.</p>
<p>[[File:media/image304.png|575x137px]]</p></li>
<li><p>The corresponding pins of the 4 groups of I2C buses in 40pin are shown in the table below. I2C2_M0 and I2C2_M4 can only use one of them at the same time, and they cannot be used at the same time. They are all the same I2C2, but they are connected to different pins. Please don’t think that they are two different sets of I2C2 buses.</p></li></ol>
{| class="wikitable" style="width:800px;"
|-
| style="text-align: left;"| '''I2C bus'''
| style="text-align: left;"| '''i2c8-m2'''
|}
</ol>
<ol start="3" style="list-style-type: decimal;">
<li><p>In the linux system, the I2C bus in the 40 pin is closed by default, and it needs to be opened manually to use it. 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="width:800px;" |-|<p>orangepi@orangepi:~$ '''sudo orangepi-config'''</p>|}</li>
<li><p>Then select '''System'''</p>
<p>[[File:media/image234.png|397x184px]]</p></li>
</li>
<li><p>After starting the linux system, first confirm that there are device nodes that need to use I2C under '''/dev'''</p>
{| class="wikitable" style="width:800px;" |-|<p>orangepi@orangepi:~$ '''ls /dev/i2c-*'''</p>|}</li>
<li><p>Then connect an I2C device to the I2C pin corresponding to the 40 pin interface</p></li>
<li><p>Then use the '''i2cdetect -y''' command, if the address of the connected i2c device can be detected, it means that i2c can be used normally</p>
{| class="wikitable" style="width:800px;"
|-
|
<p>orangepi@orangepi:~$ '''sudo i2cdetect -y 2''' #i2c2 command</p>
<p>orangepi@orangepi:~$ '''sudo i2cdetect -y 4''' #i2c4 command</p>
<p>orangepi@orangepi:~$ '''sudo i2cdetect -y 5''' #i2c8 command</p>
<p>orangepi@orangepi:~$ '''sudo i2cdetect -y 8''' #i2c8 command</p></li></ol>|}
<div class="figure">
</div>
</li></ol>
<span id="pin-uart-test"></span>
=== 40 pin UART test ===