Install Coral AI PCIe Edge TPU on Raspberry Pi 5

coral-ai-pcie-edge-tpu-raspberrypi-5-setup

#!/bin/bash

cd /

sudo apt update

echo "deb https://packages.cloud.google.com/apt coral-edgetpu-stable main" | sudo tee /etc/apt/sources.list.d/coral-edgetpu.list

curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -

sudo apt-get update


sudo apt-get install libedgetpu1-std

sudo apt install -y devscripts debhelper

sudo apt install dkms

sudo apt-get install dh-dkms

# Clone the Gasket driver repository
sudo git clone https://github.com/google/gasket-driver.git

# Change directory to the cloned repository
cd gasket-driver

# Build the Gasket driver package
sudo debuild -us -uc -tc -b

# Go back to the parent directory
cd ..

# Install the built Gasket driver package
sudo dpkg -i gasket-dkms_1.0-18_all.deb


sudo sh -c "echo 'SUBSYSTEM==\"apex\", MODE=\"0660\", GROUP=\"apex\"' >> /etc/udev/rules.d/65-apex.rules"

sudo groupadd apex

sudo adduser $USER apex


# Update the boot configuration for Raspberry Pi
echo "kernel=kernel8.img" | sudo tee -a /boot/firmware/config.txt

# Back up the Device Tree Blob (DTB) 
sudo cp /boot/firmware/bcm2712-rpi-5-b.dtb /boot/firmware/bcm2712-rpi-5-b.dtb.bak 

# Decompile the DTB into a DTS file 
sudo dtc -I dtb -O dts /boot/firmware/bcm2712-rpi-5-b.dtb -o ~/test.dts 

# Modify the Device Tree Source (DTS) 
sudo sed -i '/pcie@110000 {/,/};/{/msi-parent = <[^>]*>;/{s/msi-parent = <[^>]*>;/msi-parent = <0x67>;/}}' ~/test.dts

# Recompile the DTS back into a DTB 
sudo dtc -I dts -O dtb ~/test.dts -o ~/test.dtb 

# Replace the old DTB with the new one 
sudo mv ~/test.dtb /boot/firmware/bcm2712-rpi-5-b.dtb

sudo reboot now

This can happen if the board you use does not have proper routing and a high quality FPC cable: raspberrypi/linux#6126

That is why the kernel overlay is not for coral itself, it does not work on all PCIe hats.

You can check for dmesg errors, but I think this is the problem

FYI: There is an updated rpi-source which fixes the "ERROR: Unexpected processor 4 (use --processor argument)" issue https://github.com/RPi-Distro/rpi-source I installed from master and it fixed it on my RPI 5.

Todays attempt with a clean SD Card image from the Raspiberry Pi Image

I ran lines 1-46 Up to adding the user to the group and then rebooted.

~ $ uname -a
Linux frigate 6.6.31+rpt-rpi-v8 #1 SMP PREEMPT Debian 1:6.6.31-1+rpt1 (2024-05-29) aarch64 GNU/Linux~ $ ls /dev/a*
/dev/apex_0  /dev/autofs
~ $ lspci -nn | grep 089a
0000:01:00.0 System peripheral [0880]: Global Unichip Corp. Coral Edge TPU [1ac1:089a]

Hi, I found out that when I upgrade to 6.6.31+rpt-rpi-v8

~ $ sudo lspci -vvv|grep -i MSI-X
	Capabilities: [d0] MSI-X: Enable- Count=128 Masked-
	Capabilities: [b0] MSI-X: Enable+ Count=61 Masked-

this will fail [d0] MSI-X: Enable-, going back to 6.6.20+rpt-rpi-v8 everything will work again (as in the sample in pycoral will run). Not sure if its related to your issue. Anyone know why it breaks when upgrade to 6.6.31+rpt-rpi-v8?

Following up on this, i use apt-mark to lock the kernel:

~ $ sudo apt-mark hold linux-headers-rpi-2712
linux-headers-rpi-2712 set on hold.
~ $ sudo apt-mark hold linux-headers-rpi-v8
linux-headers-rpi-v8 set on hold.
~ $ sudo apt-mark hold linux-image-rpi-2712
linux-image-rpi-2712 set on hold.
~ $ sudo apt-mark hold linux-image-rpi-v8
linux-image-rpi-v8 set on hold.
~ $ sudo apt-mark hold linux-libc-dev
linux-libc-dev set on hold.

after upgrade the kernel remain the same but the same issue occurs, so its some other package that got updated and cause the MSI-X issue

This can happen if the board you use does not have proper routing and a high quality FPC cable: raspberrypi/linux#6126

That is why the kernel overlay is not for coral itself, it does not work on all PCIe hats.

You can check for dmesg errors, but I think this is the problem

The Pineberry board has just arrived and it solved all of my problems. Works like magic.

It just works, both cores are visible and usable.

—-
I noticed a new kernel version is available. Do you know if it included everything required to let the hat work just from the box?