doc/img_build_instruction/kuiper.md

**IMPORTANT pre-conditions**:
- Install Vivado 2021.1. Make sure install Vitis as well. You should have this directory: your_Xilinx_install_directory/Vitis (NOT Vitis_HLS!)
  - If the Vitis is not installed, you can add it by running "Xilinx Design Tools --> Add Design Tools for Devices 2021.1" from Xilinx program group/menu in your OS start menu, or Help menu of Vivado.
- SD card at least with 16GB
- Install packages: `sudo apt install flex bison libssl-dev device-tree-compiler u-boot-tools -y`

[[Use openwifi prebuilt img](#Use-openwifi-prebuilt-img)]
[[Build SD card from scratch](#Build-SD-card-from-scratch)]
[[Use existing SD card on new board](#Use-existing-SD-card-on-new-board)]

## Use openwifi prebuilt img

Download openwifi pre-built img (see [Quick start](../../README.md#quick-start)), and extract it to .img file.

Use dd command to flash the SD card. (Or other software like Startup Disk Creator in Ubuntu)
```
sudo dd bs=512 count=31116288 if=openwifi-xyz.img of=/dev/your_sdcard_dev
```
To have correct count value, better to check the .img file actual situation by "fdisk -l img_filename".

Then start from the 2nd step of the [Quick start](../../README.md#quick-start) in README.

## Build SD card from scratch

Download image_2022-08-04-ADI-Kuiper-full.zip from https://wiki.analog.com/resources/tools-software/linux-software/kuiper-linux?redirect=1

Extract it to .img file.

Use dd command to flash the SD card. (Or other software like Startup Disk Creator in Ubuntu)
```
sudo dd bs=512 count=24018944 if=2022-08-04-ADI-Kuiper-full.img of=/dev/your_sdcard_dev
```

(To have correct count value, better to check the .img file actual situation by "fdisk -l img_filename". While making .img from SD card, check the SD card dev instead)

Mount the BOOT and rootfs partition of SD card to your computer.

Change the SD card file: Add following into rootfs/etc/network/interfaces
```
# The loopback interface
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static

#your static IP
address 192.168.10.122

#your gateway IP
gateway 192.168.10.1
netmask 255.255.255.0

#your network address "family"
network 192.168.10.0
broadcast 192.168.10.255
```

Change the SD card file: Add following into rootfs/etc/sysctl.conf
```
net.ipv4.ip_forward=1
```

Change the SD card file: Add following into rootfs/etc/systemd/system.conf
```
DefaultTimeoutStopSec=2s
```

Put the openwifi/kernel_boot/10-network-device.rules into rootfs/etc/udev/rules.d/

Run **update_sdcard.sh** from openwifi/user_space directory to further prepare the SD card. The last argument $SDCARD_DIR of the script is the directory (mounting point) on your computer that has BOOT and rootfs directories/partitions.

The script will build and put following things into the SD card:
  - Linux kernel image file ([Update Driver](../../README.md#Update-Driver)):
    - adi-linux-64/arch/arm64/boot/Image (64bit)
    - adi-linux/arch/arm/boot/uImage (32bit)
  - devicetree file:
    - openwifi/kernel_boot/boards/zcu102_fmcs2/system.dtb (64bit)
    - openwifi/kernel_boot/boards/$BOARD_NAME/devicetree.dtb (32bit)
  - BOOT.BIN ([Update FPGA](../../README.md#Update-FPGA)):
    - openwifi/kernel_boot/boards/$BOARD_NAME/output_boot_bin/BOOT.BIN
  - openwifi driver ([Update Driver](../../README.md#Update-Driver)).
  - openwifi/user_space files and openwifi/webserver files

After **update_sdcard.sh** finishes, please do the 2nd step "Config the correct files ..." in [Quick start](../../README.md#quick-start). Then power on the board with the SD card, connect the board to your host PC (static IP 192.168.10.1) via ethernet, and ssh to the board with password **"analog"**
```
ssh [email protected]
```

Then change password to "openwifi" via "passwd" command onbard.

Enlarge the onboard SD disk space, and reboot (https://github.com/analogdevicesinc/adi-kuiper-gen/releases)
```
raspi-config --expand-rootfs
reboot now
```
Setup routing/NAT **on the PC** for your board -- this internet connection is **important** for post installation/config.
```
sudo sysctl -w net.ipv4.ip_forward=1
sudo iptables -t nat -A POSTROUTING -o NICY -j MASQUERADE
sudo ip route add 192.168.13.0/24 via 192.168.10.122 dev ethX
```
**ethX** is the PC NIC name connecting the board ethernet. **NICY** is the PC NIC name connecting internet (WiFi or another ethernet).

If you want, uncommenting "net.ipv4.ip_forward=1" in /etc/sysctl.conf to make IP forwarding persistent on PC.

Test the connectivity. Run on board (in the ssh session):
```
route add default gw 192.168.10.1
ping IP_YOU_KNOW_ON_YOUR_NETWORK
```
If there is issue with the connectivity (ping can not reach the target), it needs to be solved before going to the next step.

Do misc configurations/installations in the ssh session onboard:
```
sudo apt update
chmod +x /root/openwifi/*.sh

# install and setup dhcp server
sudo apt-get -y install isc-dhcp-server
cp /root/openwifi/dhcpd.conf /etc/dhcp/dhcpd.conf

# install hostapd and other useful tools
sudo apt-get -y install hostapd
sudo apt-get -y install tcpdump
sudo apt-get -y install webfs
sudo apt-get -y install iperf
sudo apt-get -y install iperf3
sudo apt-get -y install libpcap-dev
sudo apt-get -y install bridge-utils

# build on board tools
sudo apt-get -y install libnl-3-dev
sudo apt-get -y install libnl-genl-3-dev
cd /root/openwifi/sdrctl_src
make clean
make
cp sdrctl ../
cd /root/openwifi/side_ch_ctl_src/
gcc -o side_ch_ctl side_ch_ctl.c
cp side_ch_ctl ../
cd /root/openwifi/inject_80211/
make clean
make
cd ..
```

Run openwifi in the ssh session onboard:
```
/root/openwifi/setup_once.sh (Only need to run once for new board)
cd /root/openwifi
./wgd.sh
ifconfig sdr0 up
iwlist sdr0 scan
./fosdem.sh
```

## Use existing SD card on new board

Just operate the existing/working SD card of the old board on your computer starting from the 2nd step of the [Quick start](../../README.md#quick-start) in README. Then start using the SD card on the new board.