This document guides you through the processes of downloading and running this release package.
The hardware requirements for using this release package are as follows:
The figure below shows the different components of the 4b board.
Note: power input DC 12V/2A or 5V/4A (type-c power input not support pd)
UART serial port on the GPIO header on pins 8, TXD and 10, RXD. The UART port can connect to a wide range of devices directly using 3.3V UART pins. The list of gpio default functions is as follows.
|image name||path||download tool|
|RKDevTool_Release_v2.92_loader0411.zip||CoolPi 4B/loader/||windows RKDevTool（need install DriverAssitant_v5.12.zip prefer）|
|Cool Pi 4B Ubuntu22 20230306 System Install.iso||CoolPi 4B/udisk install/||windows rufus-3.21.exe|
|20230306-ubuntu-22.04-preinstalled-desktop-arm64-coolpi.zip||CoolPi 4B/ubuntu/||windows balenaEtcher|
|20230115-ubuntu-20.04-preinstall-server-arm64-coolpi.zip||CoolPi 4B/ubuntu/||windows balenaEtcher|
The board images can be flashed to the target spi flash and emmc by using the RKDevTool and balenaEtcher. User can also install the system through a installation u disk with rufus tool.
In general, user do not have to upgrade the default loader.
Tools need to be prepared：
Install DriverAssitant_v5.12.zip with Windows 7/10/11.
Uncompress file RKDevTool_Release_v2.92_loader0411.zip.
Plug in the USB cable and connect to the computer.
Short circuit this position with tweezers.
Reconnect the typec power supply and power on.
Execute firmware program writing.
Plug in the power and press the power button at least three times, and the machine will enter UMS mode.
Download system iso file, then run the tool that makes the boot USB stick.
Example: Image file name coolpi-sdcard.img
Insert the USB stick into the blue USB3.0 port (the lower one) of 4b board, then power up and wait for automatic installation to complete. User can view installation status via serial port or hdmi out display.
Download system backup iso file 'Cool Pi 4B Backup 20230329.iso', make a new boot usb stick. The operation steps are the same as the installation step.
When the backup is complete, the backup directory will be created in the root directory of the udisk.
Copy the backup directory to the installation udisk, rename it as the install directory, user can deploy the backup system with this udisk.