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fbcp (frame buffer copy)

Provides fbcp driver for SPI based displays for Raspberry Pis via fbcp-ili9341

Supported Displays

fbcp-ili9341 supports several displays but we have compiled controllers for

Display Tag Tested Tested On
Adafruit PiTFT - Assembled 480x320 3.5" TFT+Touchscreen for Raspberry Pi adafruit-hx8357d-pitft ✅ 3B+
Adafruit 2.8" 320x240 TFT w/ Touch screen for Raspberry Pi adafruit-ili9341-pitft
Adafruit PiTFT 2.2" HAT Mini Kit - 320x240 2.2" TFT - No Touch adafruit-ili9341-pitft
Freeplay CM3 DIY Kit freeplaytech-waveshare32b
Waveshare 3.5" 480x320 (ILI9486) waveshare35b-ili9486
Tontec 3.5" 320x480 LCD Display tontec-mz61581
Waveshare 240x240, 1.3inch IPS LCD display HAT for Raspberry Pi (ST7789VW) waveshare-st7789vw-hat
Waveshare 128x128, 1.44inch LCD display HAT for Raspberry Pi (ST7735S) waveshare-st7735s-hat
KeDei 3.5 inch SPI TFTLCD 480*320 16bit/18bit version 6.3 2018/4/9 kedei-v63-mpi3501
Generic rpi-fbcp using BALENA_HOST_CONFIG_dtoverlay for drivers dtoverlay ✅ 3B+

Usage

fbcp is meant to be used alongside other services, so you will need to create a service in your docker-compose.yml file:

So for example, if you are using fbcp with the Adafruit PiTFT - Assembled 480x320 3.5" TFT+Touchscreen along with the dashboard and browser blocks with a Raspberry Pi 3, you would use the following docker-compose.yml file

version: "2.1"

services:
  fbcp:
    image: bh.cr/balenalabs/fbcp
    privileged: true
  ...

Then set the FBCP_DISPLAY environment variable. e.g FBCP_DISPLAY=adafruit-hx8357d-pitft

⚠️ Touch compatibility ⚠️

fbcp block includes two drivers, namely

  • tasanakorn/rpi-fbcp which has touch support and is used when FBCP_DISPLAY=dtoverlay. You will still need to set the proper dtoverlay driver and params.
  • juj/fbcp-ili9341 which does not have touch support. See here

Configuring HDMI and TFT display sizes

The following Device Configuration variables might be required for proper scaling and resolutions:

Name Value
BALENA_HOST_CONFIG_hdmi_cvt <width> <height> <framerate> <aspect> <margins> <interlace> <rb> e.g 480 320 60 1 0 0 0
BALENA_HOST_CONFIG_hdmi_force_hotplug 1
BALENA_HOST_CONFIG_hdmi_group 2
BALENA_HOST_CONFIG_hdmi_mode 87

These lines hint native applications about the default display mode, and let them render to the native resolution of the TFT display. This can however prevent the use of the HDMI connector, if the HDMI connected display does not support such a small resolution.

You can read more about these settings in the original fbcp-ili9341 documentation here.