Difference between revisions of "CM4-DUAL-ETH-BASE"

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Revision as of 11:53, 14 July 2021

CM4-DUAL-ETH-BASE
CM4-DUAL-ETH-BASE
Compute-Module-4-1.jpg


With three USB3.2 and two Gigabit Ethernet ports, for all Variants of CM4
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Overview

CM4-DUAL-ETH-BASE is a base board that can be used with Raspberry Pi Compute Module 4, and supports 7~12V 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 burn the image.
5: When CM4 is in normal use, it needs to provide at least 12V 1.5A 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
CM4-DUAL-ETH-BASE-details-size.jpg
Compute_Module 4
Compute Module 4 IO Board 5.png

What's on Board

CM4-DUAL-ETH-BASE-details-intro.jpg

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 3-way 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 Micro SD Used to connect the Micro SD 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 burn 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 SD 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

RS485/RS232

It is closed by default. If you need to open it, you need to add content in config.txt:
sudo nano /boot/config.txt

 dtoverlay=uart3
 dtoverlay=uart5



RS232 occupies GPIO5/GPIO4 (BCM code 4/5), device number ttyAMA1.
RS485 occupies GPIO13/GPIO12 (BCM code 13/12), device number ttyAMA2.

Note: There is an RS485 serial port switch on the back, which can be switched to GPIO14/GPIO15.

USB2.0

The USB interfaces are default disabled in CM4, you need to enable it by adding the following lines: the config.txt.

dtoverlay=dwc2,dr_mode=host

It will take effect after restart.

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).
CM4 Burn EMMC 12.png

RTC FAN

  • Note: Please connect the fan before turning on the power of the expansion board and then complete the test. Please do not connect the fan after the expansion board has been powered on, that is, the fan control chip has been powered on, otherwise the chip will be burned!
  • Note: Please confirm the fan voltage and the actually connected fan power supply before connecting.

Note that if you want to use the RTC function, please first disable the DSI and CSI. And 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 simple use or need to add to your program instead of the kernel, see C and Python demos. CM4 RTC FAN

RTC

Open the terminal and modify the config.txt file.

 sudo nano /boot/config.txt

Add the following lines to the file and modify the audio setting:

 #Add the lines to the end of file
 dtparam=i2c_vc=on
 dtoverlay=i2c-rtc,pcf85063a,i2c_csi_dsi
 #remove the setting dtparam=audio=on by adding the # to the front of the line
 #dtparam=audio=on

Save and reboot the Raspberry Pi.

 sudo reboot

Hwclock

Synchronize system clock -> hardware clock.

 sudo hwclock -w

Synchronize hardware clock -> system clock.

sudo hwclock  -s

Note that you need to disable the network synchronization function, otherwise, the time will be changed according to network time.

Set hardware clock:

sudo hwclock --set --date="9/8/2021 16:45:05"

Check the hardware clock.

sudo hwclock -r

Check the version.

sudo hwclock --verbose

Cooling fan

When powered on, the fan will spin for 1 second, then stop for 2 seconds, and then spin again, this is a normal phenomenon.
There is currently no official configuration method for fans, there is a third-party configuration method: https://github.com/neg2led/cm4io-fan
This method is released by a third party, not an official release, and we are not responsible for any problems!

 mkdir -p ~/src
 cd ~/src
 git clone https://github.com/neg2led/cm4io-fan.git
 cd cm4io-fan
 sudo chmod 777 install.sh
 sudo  ./install.sh

The device tree overlay has a few options, here's the equivalent of a /boot/overlays/README info section:

 #############################
 Name:   cm4io-fan
 Info:   Raspberry Pi Compute Module 4 IO Board fan controller
 Load:   dtoverlay=cm4io-fan,<param>[=<val>]
 Params: minrpm             RPM target for the fan when the SoC is below 
                            mintemp (default 3500)
        maxrpm              RPM target for the fan when the SoC is above
                            maxtemp (default 5500)
        midtemp             Temperature (in millicelcius) at which the fan
                            begins to speed up (default 50000)
        midtemp_hyst        Temperature delta (in millicelcius) below mintemp
                            at which the fan will drop to minrpm (default 2000)
        maxtemp             Temperature (in millicelcius) at which the fan 
                            will be held at maxrpm (default 70000)
        maxtemp_hyst        Temperature delta (in millicelcius) below maxtemp
                            at which the fan begins to slow down (default 2000)
  #############################

For example, speed up the fan if the temperature is higher than 45°C and set it to maximum value if the temperate is higher than 50°C:

 dtoverlay=cm4io-fan,minrpm=500,maxrpm=5000,midtemp=45000,midtemp_hyst=2000,maxtemp=50000,maxtemp_hyst=2000

CSI DSI

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://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/
  #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 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 enabled 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





Support

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