CM4-IO-BASE-A
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Overview
Mini Base Board (A) Designed For Raspberry Pi Compute Module 4.
Release Notes
Version: CM4-IO-BASE-A V4
1: Fix the inconsistency between BT-DIS and WIFI-DIS silk screen and actual pins
2: DSI interface is changed from DSI0 to DSI1, high resolution is supported
Version: CM4-IO-BASE-A V3.1
1: Fix the problem that some CM4 cannot be restarted
2: The power supply scheme is modified to improve the output capacity.
Note
1: DO NOT unplug any devices other than HDMI and USB when powering on.
2: FAN only supports 5V, and 12V is not supported. Confirm the fan voltage before connecting. This version of the fan does not have a controller and cannot be adjusted in speed.
3: The DSI display interface is the DSI0 interface, and the DSI1 display interface is not connected. (V4 version starts to display interface for DSI1)
4: A type C interface can be used for the power supply or a USB SLAVE interface for programming images.
5: To ensure the normal power supply of CM4, please do not connect other devices when using the Type C interface to flash the image.
6: When CM4 is in normal use, it needs to provide 5V/2A power supply for CM4. Otherwise, problems such as automatic shutdown, frequency reduction, etc. may occur.
7: When using the M.2 interface, please use the matching screws. Using screws of other lengths may cause the CM4 core to be damaged by the screws.
8: The module does not have any protection, please do not short-circuit the power supply.
9: USB2.0 is closed by default, if you need to open it, you need to add dtoverlay=dwc2,dr_mode=host.
10: If you want to use HDMI1 alone, you can purchase it separately if you need to use it HDMI Adapter.
11: Both USB 3/4 and HDMI1 need to be used, you can use adapter board to connect it out.
12: This expansion board does not support the POE function.
13: M.2 interface power supply is limited to 1.5A, if it causes problems such as slowing down of solid state or other equipment, it is recommended to buy version B. (V3 version has been fixed)
Dimension
CM4-IO-BASE-A:
Compute_Module 4 Core board:
What's on board
| No. | Component | Description |
| 1 | CM4 connector | Suitable for all versions of Compute Module 4 |
| 2 | DC power supply/programming interface | 5V/2.5A power supply, also can be used as an eMMC programming interface |
| 3 | DISP Interface | MIPI DSI Display Interface |
| 4 | FAN header | For connecting cooling fan, allows speed adjustment and measurement, only supports 5V fan. |
| 5 | CAM Interface | Dual MIPI CSI camera interface |
| 6 | HDMI0 Interface | HDMI Interface, Support 4K 30fps output |
| 7 | USB 2.0 Interface | 2-channel USB 2.0 Interface, for connecting sorts of USB devices |
| 8 | Gigabit Ethernet | Gigabit Ethernet RJ45 connector, with 10 / 100 / 1000M network support |
| 9 | M.2 indicator | Indicating the operating status of M.2 interface |
| 10 | ACT indicator | Raspberry Pi operating status indicator |
| 11 | PWR indicator | Raspberry Pi power indicator |
| 12 | BOOT selection | Jumper shorted: CM4 would be booted from USB-C interface Jumper opened: CM4 would be booted from eMMC or TF card |
| 13 | 40PIN GPIO header | Conveniently connect various HAT modules |
| 14 | TF Card Slot | For connecting a TF card with a pre-flashed image (Lite variant ONLY). |
| 15 | HDMI1 interface | HDMI1 Interface, Support 4K 30fps output |
| 16 | USB 2.0 connector | Can be connected through an adapter |
| 17 | FE1.1S | USB HUB chip, expanding one USB port to 4x ports |
| 18 | M.2 Interface | Supports sorts of NVME SSD, or communication modules with PCIE M.2 KEY-M interface |
Precautions
Do not plug or unplug any device while it is powered on.
Writing Image
- Write Image for Compute Module Boards eMMC version
- Write Image for Compute Module Boards Lite version
USB2.0
CM4 Error:
config failed, hub doesn't have any ports! (err -19)
However, the USB can still be used. If you want to remove this error, remove "otg_mode=1" in [cm4] of config.txt, and add "dtoverlay=dwc2, dr_mode=host" (USB cannot be recognized without adding it).
If the USB does not work, you need to add the following to the config .txt file:
dtoverlay=dwc2,dr_mode=host
Then reboot.
M.2
The M.2 interface type is M KEY, which only supports PCIE channel devices (including NVME solid state, etc.), and does not support SATA hard disks.
Support some type of adapter cards by using the PCIE channel. Some types of cards cannot be driven by the official Raspberry Pi image, it needs to recompile the kernel.
FAN
The PWM pin of the FAN is connected to the GPIO18 of the CM4 board.
For an example of controlling the fan speed using the Pi GPIOs, see this page: https://www.waveshare.com/wiki/PI4-FAN-PWM#How_to_enable_it_via_Programming
CSI DSI
The V4 version starts to use the DSI1 interface, select the corresponding command when compiling the corresponding file.
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
Resource
Document
3D Drawing
Demo codes
Software
FAQ
- 1. Check whether dtparam -audio - on is blocked in /boot/config.txt
- 2. Check whether the /boot/dt-blob.bin file exists, if it cannot be used, delete it.
No, it does not support.
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