Before you config the SAMF-OS_OrangePi_zero. You need an TF card with at least 8G capacity.
Download and flash the OS image with balenaEtcher software to your TF card. Insert your flashed TF card to OrangePi-zero and connect Ethernet cable then power on. Find the ip address of OrangePi-zero on your router, host name is orangepizero.
You can find the firmware klipper.bin in OrangePi-zero folder after you download the github repository. It is also stay in the OS path firmwares\cheetah2.0.bin after you login the OS with SSH.
Original SSH account and password:
account: fysetc
password: fysetc123
Enter DFU mode(set a jumpper on 3 and B0 pin and re-power on the board ), and flash the firmware with the command below after you connect your OrangePi and Cheetah with USB cable.
dfu-util -R -a 0 -s 0x08008000:leave -D firmwares/cheetah2.0.bin
Or follow the instructions here for firmware uploading.
Prepare the pinter.cfg, using the command below
cp klipper_config/cheetah2.0.cfg firmware/printer.cfg
You probably need to change id by ls /dev/serial/by-id command.
I use the generic klipper config for this example, you need to change it according to your machine. Now visit the webpage with your orangepi-zero IP address. Good to go.