VoCore Screen

With Touch Screen
note: connectors are designed for inside shell usage, they are pretty weak, please take care.

VoCore Screen is a fast screen for high quality display usage for embed devices. It uses USB2.0 port to display real color(24bit) at 25fps, fit for video, embed rich UI interface application. It is designed for the device who does not have MIPI, HDMI or other video interface but only have USB2.0 interface.

DEMO VIDEO: Play Doom on VoCore2

DEMO VIDEO: Use as PC Display

DEMO VIDEO: Use VoCore2 as Control Panel

Parameters

Details
SIZE97mm x 58mm x 3.8mm
DISPLAY SIZE86mm x 53mm, 4inch
INTERFACEUSB 2.0 480MHz
COLORS24bit, 16bit
RESOLUTION480 x 800
FRAME PER SECOND24(24bit color), 30(16bit color)
TOUCH PADSUPPORT, two points
DRIVERframebuffer, libusb
POWER SUPPLYmicroUSB 5.0V
POWER CONSUMPTION~0.5W

How It Works

The screen has memory to store the picture, so you can directly send data through USB, data format is R-G-B-R-G-...in SDK the API has packaged all necessary functions, please also check the demo of DOOM to study how it works.

Current version support framebuffer driver for VoCore2 and Raspberry, please download SDK and try fbusb.ko

Sources

KICAD MODULE: Download

DRIVER BOARD 3D MODEL: Download

MACOS/LINUX SDK and DRIVER: Download

WINDOWS SDK and DRIVER: Download

2020.05.22: new VoCore Screen has touch screen now, for old no touch screen version, please click here

Littlevgl DEMO Source Code: Download

Littlevgl DEMO Firmware: Download

note: use sysupgrade or luci directly load uncompressed firmware to VoCore2 then it will work.

Tutorials

Connect to VoCore2

1. prepare a common USB 2.0 cable with microUSB port, make sure the cable has data wires(some USB cables are only for power charge and do not have data wires, it does not work with this screen).

2. compile fbusb driver, its source code is in SDK, or get from github.com/vonger/vocore2, in package/utils/fbusb.

3. power off VoCore2 and connect the screen with USB cable to VoCore2's USB port.

4. connect VoCore2 to 5V power, then around 10~15 seconds, you can find the screen LED is light, after around 0.5s, screen will become white, then we know it works.

note: fbusb will map screen to /dev/fb0.

Connect to Raspberry Pi

1. prepare a common USB 2.0 cable with microUSB port(make sure it has data cable)

2. compile fbusb for raspberry pi

3. call 'sudo insmod fbusb.ko', if success, you can find fbusb log in dmesg.

note: fbusb will map screen to /dev/fb1.

Try framebuffer

fbusb use 16bit color as default.

1. set screen to black: dd if=/dev/zero of=/dev/fb0 bs=1000 count=768

2. set screen to random pixel: dd if=/dev/urandom of=/dev/fb0 bs=1000 count=768

note: on vocore, it is /dev/fb0; on raspi, it is /dev/fb1.

User mode(use libusb instead of fbusb driver)

this mode is for windows and other system can not use fbusb driver but we can use libusb.

please check SDK README.md and source code send_frame.c/send_cmd.c/read_touch.c for usage.

Screen Dimension