PCIe-Packet-Switch-4P
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Overview
Extended 4-Ch PCIe Gen 2 × 1 Expander, Stable Performance, Driver-Free
Features
- Extending 1-ch PCIe to 4-ch PCIe Gen 2 × 1 sockets, PCIe Gen 1 × 1 compatible.
- Flexible power supply options: powered from either PCIe 12V, OR from 12V DC header.
- Adopts ASM1184 controller, driver-free, plug and play.
- Not allow direct plugging onto the PC motherboard.
Note
- When connecting to Compute Module 4 PoE 4G Board or the Compute Module 4 IO Board, no external power adapter is required.
- This adapter does not require a driver when using it except the PCIe devices.
- The module is powered by 12V. When 12V cannot be provided, it can also be powered by 5V.
- Use 5V power supply, the power will flow back to the PCIe 12V, you need to ensure that it will not affect the normal operation of the motherboard and then use 5V power supply.
- The maximum output current of each PCIe interface 3.3V power supply must be less than 1.5A.
Supported Device
Support list：click here
For other devices, you need to rebuild the kernel
Build Kernel
You can directly refer to：Click it
Ubuntu PC is required to build the kernel
Hereby environment：Ubuntu-20.04.2.0-desktop-amd64 ：
- Set in Ubuntu PC
Install dependencies
sudo apt install git bc bison flex libssl-dev make libc6-dev libncurses5-dev
Install cross-compilation tools
sudo apt install neovim wget https://releases.linaro.org/components/toolchain/binaries/7.5-2019.12/aarch64-linux-gnu/gcc-linaro-7.5.0-2019.12-x86_64_aarch64-linux-gnu.tar.xz
Add the line export PATH=$PATH:~/gcc-linaro/bin to .bashrc
nvim ~/.bashrc
Update the environment parameters
source ~/.bashrc
Clock the linux repo
git clone --depth=1 https://github.com/raspberrypi/linux
Generate the .config file
cd linux make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- bcm2711_defconfig
Configure the file and add the driver
make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- menuconfig
Build the kernel
make -j8 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- Image modules dtbs
- Configure Raspberry Pi
- Set the password
sudo su passwd
Modify sshd_config file:
sudo nano /etc/ssh/sshd_config
PermitRootLogin prohibit-password to #PermitRootLogin yes restart Raspberry Pi
sudo reboot
- Set in Ubuntu PC：
sudo sshfs [email protected]:/ /mnt/pi-ext4 sudo sshfs [email protected]:/boot /mnt/pi-fat32 #192.168.x.x should be the IP of Raspberry Pi sudo env PATH=$PATH make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- INSTALL_MOD_PATH=/mnt/pi-ext4 modules_install sudo cp arch/arm64/boot/Image /mnt/pi-fat32/kernel8.img sudo cp arch/arm64/boot/dts/broadcom/*.dtb /mnt/pi-fat32/ sudo cp arch/arm64/boot/dts/overlays/*.dtb* /mnt/pi-fat32/overlays/ sudo cp arch/arm64/boot/dts/overlays/README /mnt/pi-fat32/overlays/ sudo apt install make
If you get the read: Connection reset by peer error, please detect the ssh public key and test it again
ssh-keygen -f "/root/.ssh/known_hosts" -R 192.168.x.x #192.168.x.x should be the IP of the Raspberry Pi