USB drive copier example project for the Adafruit 128x64 OLED Raspberry Pi bonnet, using a USB hub such as the Zero4U shield.

Uses the Adafruit OLED Bonnet Toolkit to implement an asynchronous UI for USB drive copying/formatting, controlled by the D-pad and A/B buttons.

The USB copier application, showing highlighted menus (arranged using the layout system).

On the build machine:

• git clone https://github.com/lukehutch/Adafruit-OLED-Bonnet-Toolkit.git
• cd Adafruit-OLED-Bonnet-Toolkit ; mvn install ; cd ..
• git clone https://github.com/lukehutch/usb-copier.git
• cd usb-copier ; mvn package ; cd ..
• Then copy usb-copier/target/usb-copier-0.0.2-jar-with-dependencies.jar to /home/pi on the Raspberry Pi.

On the Raspberry Pi:

• Run raspi-config and enable Interfacing Options -> Advanced Options -> i2c
• apt-get install openjdk-11-jdk wiringpi pigpio nano udevil
• sudo nano /etc/cmdline.txt
  • add kernel option: (otherwise GPIO handler cannot access /dev/mem)
    • iomem=relaxed
• sudo nano /etc/config.txt
  • add options:
    • dtparam=i2c_arm=on
    • dtparam=i2c_baudrate=1000000
• Extract libpi4j-pigpio.so to /home/pi (this is needed due to a bug in the library loading code)
  • cd ; unzip -j /path/to/usb-copier-0.0.2-jar-with-dependencies.jar lib/armhf/libpi4j-pigpio.so
• Add to /etc/rc.local :
  • sudo bash -c 'nohup java -Dpi4j.library.path=/home/pi -jar /home/pi/usb-copier-0.0.2-jar-with-dependencies.jar &'

(Some steps may need to be tweaked a little...)