CM4-DUAL-ETH-BASE
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Instruction
Overview
CM4-DUAL-ETH-BASE is a base board that can be used with Raspberry Pi Compute Module 4, and supports 7~36V DC power supply, onboard three USB3.2, dual Gigabit Ethernet ports and it is suitable for scenarios that require multiple network ports, such as soft routing.
Precautions for use
1: Do not plug and unplug any device except USB and HDMI when powered on.
2: Confirm the fan voltage before connecting, support 5V and 12V, connect 12V by default, please modify the resistance of FAN_VCC when switching.
3: The Type C interface is only used as the USB SLAVE interface to program the image, and cannot be used as a power supply.
4: In order to ensure the normal power supply of CM4, please do not connect other devices when using the Type C interface to flash the image.
5: When CM4 is in normal use, it needs to provide at least 18W power supply. Otherwise, there may be problems such as automatic shutdown, frequency reduction and so on.
6: For Opwenwrt, see the instructions for use.
7: This expansion board does not support POE function.
Version
Version: CM4-DUAL-ETH-BASE V3 (20220527)
- 1: Add common mode inductance to improve EMI. (CE certified)
Version: CM4-DUAL-ETH-BASE V2 (20220518)
- 1: DSI interface changed from DSI0 to DSI1
- 2: Correct the mismatch between screen printing and network in RTC SYSTEM and other parts
Version: CM4-DUAL-ETH-BASE V1
- Initial version
Dimension
CM4-DUAL-ETH-BASE
Compute_Module 4
What's on Board
| No. | Component | Description | |
| 1 | CM4 socket | Suitable for all variants of Compute Module 4 | |
| 2 | 40PIN GPIO | Connect HAT module | |
| 3 | Gigabit Ethernet connector | Dual RJ45 Gigabit Ethernet ports, support 10/100/1000M network access ETHERNET 0: CM4 native network port ETHERNET 1: USB extended network port | |
| 4 | USB 3.2 | 3x USB 3.2 Gen1 interface, support various USB device insertion | |
| 5 | HDMI | Dual HDMI ports, support dual 4K 30fps output | |
| 6 | CAM | Dual MIPI CSI camera interface | |
| 7 | DC Power | 7~36V DC wide voltage power supply | |
| 8 | Dual LED | Red light: Raspberry Pi power indicator Green light: Raspberry Pi working status indicator | |
| 9 | TF | Used to connect the TF card with the system to start Compute Module 4 Lite | |
| 10 | FAN | Convenient access to cooling fans, support speed regulation and speed measurement | |
| 11 | DISP | MIPI DSI Display interface - DISP1 | |
| 12 | USB SLAVE | Compute Module 4 eMMC Version can flash the system image through this interface | |
| 13 | RTC Battery connector | Can be connected to CR1220 button battery | |
| 14 | RTC Interrupt pin switching | PI-RUN: RTC trigger interrupt CM4 restart GN-EN: RTC trigger interrupt CM4 power off D4: RTC trigger interrupt D4 pin | |
| 15 | IO-VREF selection | CM4 IO logic voltage switch 3.3V or 1.8V | |
| 16 | FAN power supply options | can choose 5V or 12V voltage to drive the fan | |
| 17 | System function switch | BT_DIS: Bluetooth disabled, only for CM4 version with antenna WiFi_DIS: WiFi disabled, only for CM4 version with antenna WP_DIS: Start mode switch, only For use without EMMC boot or TF boot | |
| 18 | RTC/FAN I2C bus selection | SDA0/SCL0: I2C-10 and CSI/DSI shared GPIO3/2: I2C-1 and 40PIN shared | |
| 19 | RTL8153 | USB Gigabit LAN Chip | |
| 20 | EMC2301 | Fan controller, control fan speed, measure fan speed | |
| 21 | VL805 | USB 3.0 HUB |
Precautions
Do not plug or unplug any device while it is powered on.
Writing Image
- Write Image for Compute Module Boards eMMC version
- Wrote Image for Compute Module Boards Lite version
RTC FAN
Fan voltage switching
As shown in the figure, the FAN voltage is switched according to the position of the resistor, and the default is 12V.
- Note: Please connect the fan before turning on the power of the base board and then complete the test. Please do not connect the fan after the base board is powered on, because the fan control chip has been powered on, otherwise, the chip will be burned!
- Note: Before connecting, please confirm whether the rated voltage of the fan is consistent with the voltage actually connected to the fan.
Please note that DSI and CSI are prohibited when using RTC.
I2C-10 is used by default
RTC (PCF85063a) on i2c-10, address is 0x51 (7-bit address)
FAN ( EMC2301 ) on i2c-10, address is 0x2f (7-bit address)
If you need to add it to your program instead of the kernel, you can refer to the C and Python demo reference click here.
RTC
sudo nano /boot/config.txt #Add the following lines at the end dtparam=i2c_vc=on dtoverlay=i2c-rtc,pcf85063a,i2c_csi_dsi #Add # in front of dtparam=audio=on #dtparam=audio=on #Save and exit, restart sudo reboot
How to use Hwclock
Synchronize system clock to hardware clock.
sudo hwclock -w
Synchronize hardware clock to system clock.
sudo hwclock -s #The network or the NTP needs to be closed, otherwise it will be changed back.
Set the hardware clock time:
sudo hwclock --set --date="9/8/2021 16:45:05"
View hardware clock.
sudo hwclock -r
Display version information.
sudo hwclock --verbose
Fan
1: Check whether the kernel version is higher or is 6.1.31.
uname --all
2：Add the following commands at config.txt:
dtoverlay=i2c-fan,emc2301,i2c_csi_dsi,midtemp=45000,maxtemp=65000
3：For more parameter configuration, please refer to this link.
Troubleshooting
1: After configuration, you can use the command "i2cdetect -y 10" to check whether the configuration is valid, and the valid I2C address should be UU without digits.
2: RTC value is not accurate, or an invalid prompt appears, check whether the RTC battery is connected and whether the voltage of the RTC battery is normal.
3: All configurations need to be rebooted after being added to take effect.
4: If the fan does not rotate after adding the fan driver, you can press "1" to troubleshoot and check whether the configuration is effective. If it is valid, then you can check whether the kernel version is higher or equal to 6.1.31 (uname --all). If the version is lower than 6.1.31, this kernel cannot work. For more details, you can refer to this link.
CSI DSI
CSI DSI
New Version (Bookworm)
The DSI screen is 800x480 resolution screen by default, please refer to the corresponding WIKI for other resolution screens
When using the official base board Compute Module 4 IO Board, note that the J6 jumper cap needs to be connected
DSI
#Add the following to the config.txt file: sudo nano /boot/firmware/config.txt #DSI0 (V1~V3) dtoverlay=vc4-kms-dsi-7inch,dsi0 #DSI1 (V4) dtoverlay=vc4-kms-dsi-7inch,dsi1
CSI
| Mode | CAM0 setup statement | CAM1 setup statement |
|---|---|---|
| OV9281 | dtoverlay=ov9281,cam0 | dtoverlay=ov9281,cam1 |
| IMX290/IMX327 | dtoverlay=imx290,clock-frequency=37125000,cam0 | dtoverlay=imx290,clock-frequency=37125000,cam1 |
| IMX378 | dtoverlay=imx378,cam0 | dtoverlay=imx378,cam1 |
| IMX219 | dtoverlay=imx219,cam0 | dtoverlay=imx219,cam1 |
| IMX477 | dtoverlay=imx477,cam0 | dtoverlay=imx477,cam1 |
| IMX296 | dtoverlay=imx296,cam0 | dtoverlay=imx296,cam1 |
| IMX708 | dtoverlay=imx708,cam0 | dtoverlay=imx708,cam1 |
sudo reboot
Note:
1. The single-port camera can only work on CAM0, that is, it is not possible to use CAM1 port alone. But you can use the CAM0 port alone, or connect the dual cameras 2. If the device is recognized, and the startup prompt "Camera frontend has timed out!" appears, please update "sudo rpi-update"
Test Camera
- Enter the camera detection command, and you can see that the camera has been detected
libcamera-hello --list-cameras
- Display the camera screen to the desktop
libcamera-hello -t 0
- Take a photo
libcamera-jpeg -o test.jpg
- Record a 10s video
libcamera-vid -t 10000 -o test.h264
Other commands
Check if the camera is detected
libcamera-hello --list-cameras
Open the corresponding camera
libcamera-hello --camera 1 libcamera-hello --camera 0
Take a photo
libcamera-jpeg -o test.jpg #You can add --camera to specify the camera
#The new system uses dual cameras #Remove camera_auto_detect=1 in config.txt #camera_auto_detect=1 #Add dtoverlay=imx219,cam1 dtoverlay=imx219,cam0 #Where imx219 is the camera sensor model and other sensors are supported dtoverlay=ov5647,cam0 dtoverlay=imx219,cam0 dtoverlay=ov9281,cam0 dtoverlay=imx477,cam0 dtoverlay=imx519,cam0 #Then reboot reboot #Open camera libcamera-hello -t 0 or libcamera-hello #Other instructions: #Check if the camera is detected libcamera-hello --list-cameras #Open the corresponding camera, preview for 5 seconds libcamera-hello --camera 1 libcamera-hello --camera 0 #Take photos libcamera-jpeg -o test.jpg #Shoot video libcamera-vid -t 10000 -o test.h264 #You can add --camera to specify the camera #-t <duration> option allows the user to choose how long the window is displayed in milliseconds
For more commands, you can click here.
- Note: If using a DSI interface display there will be an HDMI disabled, even if just compiling the corresponding file without connecting a DSI screen.
- Connecting either HDMI port will allow output of an image, regardless of which HDMI port is used. If two HDMI screens are connected, only HDMI0 has an image output.
- To enable two HDMI ports, remove the configuration from config.txt:
- And then reboot it.
Please refer to Raspberry Pi manual.
Old System Version (Buster and Bullseye)
Configure Files
CSI and DSI are disabled by default. When using the camera and DSI, three I2C devices, I2C-10, I2C-11, and I2C-0 will be occupied.
Booting is performed as follows:
wget https://files.waveshare.com/upload/7/75/CM4_dt_blob_Source.zip unzip -o CM4_dt_blob_Source.zip -d ./CM4_dt_blob_Source sudo chmod 777 -R CM4_dt_blob_Source cd CM4_dt_blob_Source/ #Execute (for version V1~V3) sudo dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob-disp0-double_cam.dts #Execute (for version V4) sudo dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob-disp1-double_cam.dts Add the following to the config.txt file: sudo nano /boot/config.txt Change dtoverlay=vc4-kms-v3d to dtoverlay=vc4-fkms-v3d #When using any DSI, HDMI1 has no image output, even if you are not connected to the DSI screen, as long as you compile the corresponding file, then HDMI1 will have no output #If you need to restore, delete the corresponding dt-blob.bin: sudo rm -rf /boot/dt-blob.bin #After execution, turn off the power and restart
Record Test
Connect to the camera and the DSI display:
1. Please make sure it is connected under powering off.
2. Connect to the power.
3. The display will be booted after waiting for a few seconds.
4. If it fails to boot, check whether /boot/dt-blob.bin exists, and reboot it if it exists.
Old Version (Buster)
The camera needs to run raspi-config, select Interfacing Options -> Camera -> Yes -> Finish -> Yes, reboot the system, open enable camera, and then restart to save the changes.
Test the Raspberry Pi camera.
Check the screen of the first connected camera:
sudo raspivid -t 0 -cs 0
Check the screen of the second connected camera:
sudo raspivid -t 0 -cs 1
Openwrt
Overview
Openwrt has high customization and scalable performance. Openwrt is becoming more and more popular at present. Compared with commonly used wireless routers, openwrt's modifiable firmware allows us to customize router functions according to our own needs, such as single-arm routing, automatic Define routing policies, qos, intranet penetration, etc. Note: We do not provide any technical support for Openwrt system if there has any problem during use, only provide he following tutorials and images, and no other technical support other than hardware is provided.
Configure
The openwrt image configured above supports CM4 onboard wifi and the driver of RTL8153. CM4 can be turned into a smart router,
The following will tell you how to install Openwrt on the Raspberry Pi to realize the function of a wireless router, so that the devices in the LAN can access the Internet through the wireless router, and realize the intelligent management of the LAN. The overall network topology is as follows
After booting correctly, log in to the system:
The computer is connected to the ETH0 interface, and then directly ssh remote login or web page login
The configured system default IP is: 192.168.14.1
The default IP of the system without configuration is: 192.168.1.1
Account: root without password
If you think the network port is not enough, you can buy it USB 3.2 Gen1 TO Gigabit ETH RTL8153 expansion network port, if there is one ETH/USB HUB AT RTL8152 can also expand the 100M Ethernet port and support it.
Resource
Document
- Schematic
- Raspberry Pi Compute Module 4 IO Board Brief
- Raspberry Pi Compute Module 4 IO Board Datasheet
- CSI Camera Reference
- DSI Display Reference
Demo codes
3D Drawing
Software
FAQ
a) Check if dtparam -audio -on is blocked in /boot/config.txt.
b) Check if the /boot/dt-blob.bin file exists, if it does, please delete it.
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