03-Functional_Testing

LCD

Hardware Connection

Display Test

fbinit  
echo 8 > /sys/devices/virtual/disp/disp/attr/colorbar
image-20241127100853924

Touch Test

ts_test

Click the "Draw" button to display touch trajectories:

Backlight Control

/usr/bin/lcd_bright_test 2 255  # Max brightness  
/usr/bin/lcd_bright_test 2 0    # Min brightness

Headphone

tinymix set "Headphone Switch" 1  
aplay -Dhw:audiocodec -vv /etc/sample-15s.wav
image-20241127110956315

Speaker

1730786055916

Play Audio

aplay -Dhw:audiocodec -vv /etc/sample-15s.wav

Microphone

Record & Playback

arecord -Dhw:audiocodec -f S24_LE -r 16000 -vvv test.wav  
aplay -Dhw:audiocodec -vv test.wav

WiFi

Configure WiFi

# Modify WiFi name and password  
vi /etc/wpa_supplicant.conf  
cat /etc/wpa_supplicant.conf  

ctrl_interface=/var/run/wpa_supplicant  
ap_scan=1  
update_config=1  

network={  
    ssid="wifi_oranth_2.4"  
    psk="123456789"  
    key_mgmt=WPA-PSK  
}  

# Connect to WiFi  
wpa_supplicant -D nl80211 -i wlan0 -c /etc/wpa_supplicant.conf -B  
udhcpc -i wlan0
image-20241127182924328

Bluetooth

hciconfig -a  
hciconfig hci0 up  
hcitool scan
image-20241213100311376

RTC

Power-off Time Retention Test

  1. Set system time and sync to RTC:

date -s "2024-11-06 10:30:00" && hwclock -w -f /dev/rtc1

  1. Power off the board, wait, then power it back on.

  2. Verify time consistency:

date && hwclock -f /dev/rtc1

4G Module

Check Connectivity

lsusb                     # Verify USB module detection  
ls /dev/ttyUSB*           # Check serial port nodes  
pppd call quectel-ppp &   # Dial-up  
ping www.baidu.com        # Test network  

# Troubleshooting  
ps -ef | grep pppd        # Find process ID  
kill -9 <PID>             # Terminate process  
pppd call quectel-ppp &   # Redial

SD Card

Speed Test Insert a formatted SD card (auto-mounted):

time dd if=/dev/zero of=/dev/mmcblk1 bs=1M count=300 oflag=direct
image-20241127183750626

USB

Speed Test Insert a formatted USB drive (auto-mounted):

time dd if=/dev/zero of=/dev/sda bs=1M count=300 oflag=direct
image-20241127183922113

CAN Bus

Loopback Test

  1. Connect CANL-to-CANL and CANH-to-CANH:

  2. Initialize CAN interfaces:

# CAN0  
ip link set can0 down  
ip link set can0 type can bitrate 500000  
ip link set can0 up  

# CAN1  
ip link set can1 down  
ip link set can1 type can bitrate 500000  
ip link set can1 up

  1. Start testing (CAN0 receive, CAN1 transmit):

candump can0 &  
cansend can1 123#DEADBEEF
image-20241127184109190

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