Rock 4SE Tutorial

Hardware Preparation

• Rock 4SE Controller Board x 1
• RGB LCD KeyPad HAT x1
• HDMI Cable x1
• Display x1
• Keyboard and Mouse x1

Software Preparation

• Rock 4SE OS
• Install libmraa: Follow Radxa's libmraa guide
• Install smbus: pip install smbus

Other Preparation Work

1. Enable I2C7 on Rock 4SE:
   Modify /boot/hw_intfc.conf to set intfc:i2c7=on, then reboot.

   # Hardware Interface Config 
   # For more details, check https://wiki.radxa.com/Rockpi4/hardware/devtree_overlays. 
   # Set "on" to enable the optional hardware interfaces while set "off" to disable
   intfc:pwm0=off
   intfc:pwm1=off
   intfc:uart2=off
   intfc:uart4=off
   intfc:spi1=off
   intfc:spi2=off
   intfc:i2c2=off
   intfc:i2c6=off
   intfc:i2c7=on
   

2. install smbus

Command：'pip install smbus'

Sample Code

Use the Python example codes from the Raspberry Pi section (e.g., SetColor.py or Button.py).

Result

1. Navigate to the Python examples directory: cd DFRobot_RGB1602_RaspberryPi/python/examples
2. Run the program: sudo python3 xxx.py (replace xxx.py with the example file name).
3. The LCD will display output based on the program (e.g., color changes or button presses).

Additional Information

• Rock 4SE only supports Python code.
• Ensure I2C7 is enabled and all libraries are installed before running programs.