Android User Guide

The Android manual covers terminal access, MP3 playback, video playback, Wi-Fi, Bluetooth, USB mouse and keyboard, TF card, USB disk, screen rotation, camera, Ethernet, remote control, HDMI, power on/off, and suspend / wake-up.

adb and Terminal

adb devices
adb shell

Useful commands in shell:

cat /proc/cpuinfo
cat /proc/meminfo
cat /proc/partitions
cat /proc/version
ifconfig
dmesg

Media Playback

Android supports MP3 and video playback. For audio/video debugging, check HDMI / DSI output, audio output device, media format, system player, and hardware codec status.

Wi-Fi / Bluetooth / Ethernet

The board has on-board dual-band Wi-Fi / BT and Gigabit Ethernet.

ifconfig
ip addr
ping 8.8.8.8

USB Mouse, Keyboard, TF Card, and USB Disk

HOST ports can connect mouse, keyboard, USB disk, and other peripherals. For TF-card or USB-disk issues:

mount
df -h
cat /proc/partitions
dmesg

Screen Rotation

Android Surface rotation can be configured as 0/90/180/270. After modification, reboot or repackage for verification and also check touch coordinate mapping.

HDMI Output

Micro HDMI provides HDMI OUT. If there is no display, check cable, monitor EDID, resolution, U-Boot logo, kernel logo, Android display service, and display device tree nodes.

Camera

Android 12 supports CSI camera and USB camera. Check power, reset, MCLK, I2C, MIPI lanes, camera driver, device tree, and Android Camera HAL.

Power and Suspend

The manual covers power on/off and suspend / wake-up. Debugging should focus on Power Key, PMIC, wake sources, peripheral power retention, and kernel suspend/resume logs.