CM4-NANO-A
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Introduction
Description
CM4-NANO-A is the mini board of Raspberry Pi Compute Module 4, which is a baseboard of Raspberry Pi Compute Module 4 with a power supply interface of 5V/2.5A, USB Type C.
Precautions
- DO NOT plug and unplug any device other than USB while it is powered on.
- The Type C interface can be used as a power supply or as a USB SLAVE interface to burn the image.
- In order to ensure the normal power supply of CM4, please do not connect other devices when using the Type C interface to burn the image.
- When CM4 is in normal use, it needs to provide 5V 2A power supply for CM4. Otherwise, there may be problems such as shutdown, frequency reduction, and so on.
- Since the module does not have any protection circuit, please do not short-circuit the power supply.
- USB2.0 is disabled by default, if you want to open it, you need to add the line dtoverlay=dwc2,dr_mode=host to the config.txt file.
Dimension
Onboard Resources
Label | Name | Description |
1 | CM4 socket | suitable for all variants of Compute Module 4 |
2 | Power supply/burning interface | 5V/2A power supply, can also be used as eMMC burning interface |
3 | Micro SD card interface | For inserting a Micro SD card with the system, only for Lite version |
4 | CSI Interface | Single MIPI CSI Camera Interface |
5 | USB 2.0 interface | USB 2.0 interface, support various USB device insertion |
6 | 40PIN GPIO interface | Easy access to various HAT modules |
7 | PWR indicator | Indicates the power status of the Raspberry Pi |
8 | ACT Indicator | Indicates the working status of the Raspberry Pi |
9 | AMS1117-3.3V | Supply voltage for CSI and 40Pin |
10 | BOOT | ON: Switch the USB to type C interface, and enter the download mode when powered on (configured as a large-capacity disk through rpi boot)
OFF: Switch the USB to TYPE A interface, it will not enter the download when powered on (start from eMMC or SD card) |
Introduction
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
The USB port is disabled by default on the CM4 to save power. If you need to start, you need to add the following to the config.txt file:
dtoverlay=dwc2,dr_mode=host
After restarting
If you use the latest Raspberry Pi OS (image after October 30, 2021) USB2.0 is OTG mode by default, CM4 will report an error:
config failed, hub doesn't have any ports! (err -19)
However, 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).
CSI
Configuration file
CSI and DSI interfaces are closed by default, they will use the I2C-10, I2C-11 and I2C-0.
Open a terminal and run the following commands:
wget https://www.waveshare.net/w/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/ #If using two cameras and DSI0 execute sudo dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob-disp0-double_cam.dts # if using two cameras and DSI1 execute sudo dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob-disp1-double_cam.dts #When using any DSI, HDMI1 has no image output, even if you do not connect the DSI screen, as long as the corresponding file is compiled, then HDMI1 will not 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 the CM4
Recording test
Then connect the Camera and DSI/HDMI display:
1: Make sure the connection is in the power-off state
2: Connect Power
3: Wait a few seconds for the screen to start up
4: If it fails to start, check whether /boot/dt-blob.bin exists, and restart it if it exists.
5: The camera needs to run raspi-config, select Interfacing Options->Camera->Yes->Finish-Yes, reboot the system, open the enable camera, and then restart to save the changes.
Old version (Buster)
Test the Raspberry Pi camera
Check the first camera connected to the screen:
sudo raspivid -t 0 -cs 0
Check the second camera connected to the screen:
sudo raspivid -t 0 -cs 1
New version(Bullseye)
If using the latest Raspberry Pi OS (Bullseye):
libcamera-hello -t 0 or libcamera-hello #The new system uses dual cameras #Remove camera_auto_detect=1 in config.txt #camera_auto_detect=1 #Add to dtoverlay=imx219,cam1 dtoverlay=imx219,cam0 #where imx219 is the camera sensor model, and there are other sensors dtoverlay=ov5647,cam0 dtoverlay=imx219,cam0 dtoverlay=ov9281,cam0 dtoverlay=imx477,cam0 #then restart reboot #Other part of the command: #Check if the camera is detected libcamera-hello --list-cameras #Open the corresponding camera libcamera-hello --camera 1 libcamera-hello --camera 0 #Taking Pictures libcamera-jpeg -o test.jpg #You can add --camera to specify the camera
More instructions click me
- Note: If using the DSI interface display will have an HDMI disabled, even if just compile the corresponding file without connecting the DSI screen.
- Any connection of two HDMIs can output images, not limited to that HDMI, if two HDMI screens are connected, only HDMI0 has image output
- If you want to enable both HDMI, delete the dt-blob.bin file with the following command:
sudo rm -rf /boot/dt-blob.bin
- Then reboot
Reference Raspberry Pi Manual
Resources
Official Manual
- Raspberry Pi Compute Module 4 IO Board Brief
- Raspberry Pi Compute Module 4 IO Board Datasheet
- CSI Camera Reference
Schematic
3D document
Software
Support
If you require technical support, please go to the Support page and open a ticket.