CM4-to-Pi3-Adapter
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Overview
Introduction
Onboard 4-ch USB ports, Gigabit Ethernet port, headphone jack and PoE pin, Raspberry Pi CM4 To 3B Adapter is an alternative solution for Raspberry Pi 3 Model B/B+.
Features
- Onboard standard CM4 connector, support access to CM4 Lite / eMMc series boards with Quad Core Cortex A72 64-bit processor, more powerful performance.
- Easily compatible with the interfaces of Raspberry Pi 3B / 3B+ boards.
- Onboard headphone jack (extended from USB).
- Onboard 4-ch USB ports, compatible with USB 2.0 / 1.1 transmission.
- Onboard RJ45 Gigabit Ethernet port, 10 / 100 / 1000 M adaptive.
- Onboard PoE header, for connecting PoE HATs.
- DSI interface is DSI1.
- Micro USB port is for power supply and for programming images USB SLAVE.
- Please do not connect to other devices when programming the image by micro USB so as to ensure that CM4 can be powered on normally.
- When using CM4, you need to provide 5V/4A to CM4. Otherwise, it may power off, lower frequency, etc.
- USB 2.0 is close by default, if used dtoverlay=dwc2,dr_mode=host should be added in config.txt.
- It only supports 5V fan. (12V is not supported.) Please check it before connecting the fan, and note that the speed of the 5V fan cannot be adjusted without a controller.
Dimensions
CM4-IO-BASE-B
Compute_Module 4
Onboard Resource
| Label | Name | Description | |
| 1 | Micro USB | 5V/2.5A power supply, can also be used as an eMMC programming interface | |
| 2 | HDMI0 port | HDMI port, supports 4K 30fps output | |
| 3 | CAM Interface | MIPI CSI Camera Interface | |
| 4 | Audio Interface | 3.5mm Headphone Audio Jack, USB Audio Solution | |
| 5 | Gigabit Ethernet port | RJ45 Gigabit Ethernet port, supports 10 / 100 / 1000M network access. | |
| 6 | FAN port | Connect to a cooling fan, does not support speed regulation and speed measurement only supports 5V fans | |
| 7 | USB 2.0 interface | 4-way USB 2.0 interface, support various USB device | |
| 8 | POE | Support POE HAT access | |
| 9 | 40PIN GPIO interface | Easy to connect various HAT modules | |
| 10 | BOOT | ON: CM4 USB Type C boot boot OFF: eMMC or SD card boot | |
| 11 | DISP1 interface | MIPI DSI display interface, DISP1 interface | |
| 12 | LED Indicator | Indicates the working status of the Raspberry Pi | |
| 13 | 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: EEPROM write protection | |
| 14 | IO-VREF selection | CM4 IO logic voltage switch 3.3V or 1.8V | |
| 15 | Functional pin | RUN: CM4 running status pin GL-EN: Power supply enable pin | |
| 16 | CM4 Connector | Applies to all versions of Compute Module 4 | |
| 17 | Micro SD card slot | For inserting a Micro SD card with the system, only for the Lite version |
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).
Fan
The fan uses the GPIO18 (BCM) pin to control the switch.
CSI DSI
Configuration Files
CSI and DSI is close by default. When using the camera and DSI, I2C-10, I2C-11 and I2C-0 are occupied. Execute the following commands after starting.
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/ sudo dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob-disp1-double_cam.dts #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 screen:
1: Please connect them when the power is off.
2: Connect to the 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.
Old Version (Buster)
The camera needs to run raspi-config, select Interfacing Options -> Camera -> Yes -> Finish-Yes, reboot the system, open the enabled camera, and then restart to save the changes.
Testing the Raspberry Pi Camera:
View the camera image:
sudo raspivid -t 0 -cs 0
New Version
If using the latest Raspberry Pi OS (Bullseye):
#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 #open camera libcamera-hello -t 0 or libcamera-hello #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 photos libcamera-jpeg -o test.jpg #You can add --camera to specify the camera
More instructions click me
You can refer to Raspberry Pi Manual.
Resource
Document
Program
Software
FAQ
Storage temperature: -30°C ~ +125°C
Work temperature: -20°C ~ +85°C
Humidity: 0% ~ 80% no condensation
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Support
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