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→The method of USB OTG mode switching
=== The method of USB OTG mode switching ===
{| class="wikitable" style="background-color:#ffffdc;width:800px;" |-| <big>'''The development board has 4 USB interfaces, among which the USB interface marked in red box in the figure below can support both Host mode and Device mode, and the other 3 USB interfaces only support Host mode.'''
[[File:cm4-img473.png|center]]
'''The USB OTG interface defaults to Host mode, which can be used to connect USB devices such as mouse and keyboard. If you want to use ADB, you need to <span style="color:#FF0000">manually </span>switch to Device mode.'''</big>|}
<ol style="list-style-type: decimal;">
<li><p>Then select '''Developer options''' in the expanded column</p>
<p>[[File:cm4-img479.png]]</p></li>
<li><p>Finally find the '''USB OTG Mode Switch''' switch, '''turn on the switch to switch to Device mode, turn off the switch to switch to Host mode'''</p></li></ol>
[[File:cm4-img480.png]]
</ol>
<span id="use-the-data-cable-to-connect-to-adb-debugging"></span>
=== Use the data cable to connect to adb debugging ===
