We recommend using the latest OS image to ensure you have any bug fixes and features released by the Raspberry Pi Foundation. After booting the OS, the software packages can be further updated to the most recent releases of the day by running apt-get update && apt-get upgrade from a terminal.

The downloads above should be used for all ComfilePi models. However, after imaging the SD card, you may need to update the resolution for any models that are not 800 x 480 (e.g. CPi-A150WR), or use a different display technology (e.g. CPi-A070WT). For those models, simply open the file /boot/config.txt and edit as described below.

hdmi_cvt 800 480 60 6 0 0 0

Delete these lines…

hdmi_force_hotplug=1

hdmi_group=2
hdmi_mode=87
hdmi_cvt 800 480 60 6 0 0 0

dtoverlay=i2c-rtc,ds3231

… and add these lines:

# DPI settings
hdmi_ignore_hotplug=1
hdmi_ignore_edid=1
dtoverlay=dpi24
framebuffer_width=800
framebuffer_height=480
enable_dpi_lcd=1
display_default_lcd=1
dpi_group=2
dpi_mode=87
dpi_output_format=0x48017
dpi_timings=800 0 210 2 46 480 0 22 2 23 0 0 0 60 0 33000000 6

gpio=36-37=a2

hdmi_cvt 1024 768 60 6 0 0 0

hdmi_cvt 1024 600 60 6 0 0 0

The installation procedure is the same as that used with the Raspberry Pi 3. See “Writing the image” at the Raspberry Pi Installation Instructions

For flashing eMMC models, obtain a USB-A-to-USB-A cable to connect a PC to the ComfilePi's dedicated eMMC programming USB device port, and then follow the Raspberry Pi eMMC Flashing Instructions.

COMFILE Technology maintains and distributes a custom Raspberry Pi OS image for the ComfilePi products. It starts with the original Raspberry Pi OS image, and then introduces the following changes:

• Software that prohibits commercial usage is removed: This includes Mathematica and the Wolfram Language, the Oracle JDK, and RealVNC. Any of these software packages can be reinstalled by running the appropriate sudo apt-get install {package-name} command.
• The ComfilePi's Raspberry Pi OS includes files at /opt/ComfileTech to support the following features:
  • Calibrating the Touch Screen.
  • Piezo Buzzer Beep When the Screen is Touched.
• Configuration changes necessary to support the ComfilePi's unique hardware (e.g. touchscreen, RTC, etc…).
• The latest Mono Framework is installed for .Net developers.

Source code for appropriately licensed software can be obtained by executing apt source {package_name} on the ComfilePi.