Difference between revisions of "Template:Compute Module 4 PoE 4G Board manual"

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Line 195: Line 195:
 
  ifconfig
 
  ifconfig
 
[[file:Compute Module 4 PoE 4G Board_2.png | 600px]]
 
[[file:Compute Module 4 PoE 4G Board_2.png | 600px]]
出现can0 设备号说明驱动成功<br>
+
If the device can0 is recognized, it means that the driver was installed successfully<br>
 
+
===Testing===
===测试===
+
Install can-utils:<br>
安装can-utils:<br>
+
<pre>
 
  sudo apt-get install can-utils
 
  sudo apt-get install can-utils
接收数据
+
</pre>
 +
 
 +
Receive data
 +
<pre>
 
  candump can0
 
  candump can0
发送数据
+
</pre>
 +
Send data
 +
<pre>
 
  cansend can0 000#11.22.33.44
 
  cansend can0 000#11.22.33.44
  #其中11.22.33.44 是数据
+
  #11.22.33.44 is data sent
  #如果需要发送其他数据可以使用继续添加例如
+
  #If you need to transmit more dta, you can also extend the data just like this:
 
  # cansend can0 000#11.22.33.04.70
 
  # cansend can0 000#11.22.33.04.70
#不可以使用英文和中文,两位一码格式添加
+
</pre>
  
===例程===
+
===Examples===
====【Python例程】====
+
====【Python examples】====
*进入对应的目录:
+
*Go into the directorty of python example:
*接收端运行receive.py:
+
*Open a terminal as receiver and run the receive.py:
 
<pre>
 
<pre>
 
sudo python reveive.py
 
sudo python reveive.py
 
</pre>
 
</pre>
*发送端运行send.py:
+
*Open another terminal as sender and run the send.py:
 
<pre>
 
<pre>
 
sudo python send.py
 
sudo python send.py
 
</pre>
 
</pre>
  
本例程是基于python平台,确保以及安装了python-can库<br />
+
The examples provided is absed on python, please make sure that you have installed the python-can library.<br />
在发送之前要先创建一个can设备,因为前面只是启用MCP2515内核:
+
Create a CAN device before you send data.:
 
<pre>
 
<pre>
 
os.system('sudo ip link set can0 type can bitrate 100000')
 
os.system('sudo ip link set can0 type can bitrate 100000')
 
os.system('sudo ifconfig can0 up')
 
os.system('sudo ifconfig can0 up')
 
</pre>
 
</pre>
*第一步:连接到CAN总线<br />
+
*Step 1: Connect to the CAN bus<br />
 
<pre>
 
<pre>
 
can0 = can.interface.Bus(channel = 'can0', bustyp = 'socketcan_ctypes')
 
can0 = can.interface.Bus(channel = 'can0', bustyp = 'socketcan_ctypes')
 
</pre>
 
</pre>
*第二步:创建信息<br />
+
*Step 2: Create information<br />
 
<pre>
 
<pre>
 
msg = can.Message(arbitration_id=0x123, data=[0, 1, 2, 3, 4, 5, 6, 7], extended_id=False)
 
msg = can.Message(arbitration_id=0x123, data=[0, 1, 2, 3, 4, 5, 6, 7], extended_id=False)
 
</pre>
 
</pre>
*第三步:发送信息
+
*Step 3: Send message
<pre>
+
 
can0.send(msg)
 
can0.send(msg)
 
</pre>
 
</pre>
*最后同样要关闭can设备
+
*Close the CAN device finally
 
<pre>
 
<pre>
 
os.system('sudo ifconfig can0 down')
 
os.system('sudo ifconfig can0 down')
 
</pre>
 
</pre>
*接收数据:
+
*Receive data:
 
<pre>
 
<pre>
 
msg = can0.recv(10.0)
 
msg = can0.recv(10.0)
 
</pre>
 
</pre>
recv()中定义超时接收时间。<br />
+
recv() defines the timeout<br />
'''更多请参考:https://python-can.readthedocs.io/en/stable/interfaces/socketcan.html<br />'''
+
'''for more details, please refer to https://python-can.readthedocs.io/en/stable/interfaces/socketcan.html<br />'''
 
<br />
 
<br />
  
====【C例程】====
+
====【C examples】====
*阻塞接收,树莓派打开终端,运行:
+
*Blocking receive, open the terminal of Raspberry Pi and run the following commands:
 
<pre>
 
<pre>
 
cd CAN/c/receive/
 
cd CAN/c/receive/
Line 259: Line 263:
 
sudo ./can_receive
 
sudo ./can_receive
 
</pre>
 
</pre>
*发送,树莓派打开终端,运行:
+
*Send data, open a terminal of Raspberry Pi and run the following commands:
 
<pre>
 
<pre>
 
cd CAN/c/receive/
 
cd CAN/c/receive/
Line 269: Line 273:
 
<br/><br/>
 
<br/><br/>
 
==RS485/232==
 
==RS485/232==
默认关闭,如需打开需要在config.txt中添加内容:<br>
+
The interface is closed by default, you can modify the config.txt to enable it.<br>
sudo nano /boot/config.txt<br>
+
<pre>
 +
sudo nano /boot/config.txt
 +
</pre>
 +
Add the following lines to the config.txt file:
 +
<pre>
 
  dtoverlay=uart3
 
  dtoverlay=uart3
 
  dtoverlay=uart5
 
  dtoverlay=uart5
 +
</pre>
 +
Reboot the Raspbery Pi and check if the ports are recognized.
 +
<pre>
 
  reboot  
 
  reboot  
 
  ls /dev/ttyAMA*
 
  ls /dev/ttyAMA*
<br>
+
</pre>
RS232占用GPIO5/GPIO4(BCM编码4/5),设备号ttyAMA1<br>
+
RS232 interfaces use the GPIO5/GPIO4(BCM4/5), recognized as ttyAMA1<br>
RS485占用GPIO13/GPIO12(BCM编码13/12),设备号ttyAMA2<br>
+
RS485 interfaces use the GPIO13/GPIO12(BCM13/12),recognzied as ttyAMA2<br>
===测试===
+
===Test===
 +
Install minicom and test it with the minicom<br />
 +
<pre>
 
  sudo apt-get install minicom
 
  sudo apt-get install minicom
 
  # RS232
 
  # RS232
Line 284: Line 297:
 
  #RS485
 
  #RS485
 
  sudo minicom -D /dev/ttyAMA2
 
  sudo minicom -D /dev/ttyAMA2
 
+
</pre>
 
==RTC  FAN==
 
==RTC  FAN==
 
<font color="red">
 
<font color="red">
*注意事项:请在接通拓展板电源前接上风扇再完成测试,请不要在拓展板已通电即风扇控制芯片已经通电之后再接上风扇,否则会烧掉芯片!
+
*Note:Please fiest connect the FAN and then the power, otherwise you may damage the controller of fan!
*注意事项:连接前请确认风扇电压和实际上连接的风扇供电
+
*Note: Please make sure the operation voltage of the cooling fan is the same as the carrier board.
 
</font>
 
</font>
使用树莓派系统(2021-05-07-raspios-buster-armhf-full )<br/>
+
<font color="#ff0000"> Note that if you want to use the RTC function, please first disable the DSI and CSI. </font><br/>
<font color="#ff0000"> 注意 使用RTC禁止使用DSI和CSI  </font><br/>
+
If you want to use them at the same time, please change the I2C to I2C1 (the right)<br/>
如果需要同时使用,将I2C切换到I2C1设备上(右边)<br/>
+
 
[[file:Compute Module 4 PoE 4G Board_11.png | 500px]]<br/>
 
[[file:Compute Module 4 PoE 4G Board_11.png | 500px]]<br/>
<font color="#ff0000"> 切换之后所有程序或者驱动全部需要修改 </font><br/>
+
<font color="#ff0000"> You need to modify the codes and driver after changing.</font><br/>
<font color="#ff0000"> 例程默认使用I2C10(左边) </font><br/>
+
<font color="#ff0000"> The demo codes use I2C10 by default (the left)</font><br/>
 
<br/>
 
<br/>
 
+
Please refer to the wiki of CM4_RTC_FAN about how to control the cooling fan and the RTC [[https://www.waveshare.com/wiki/CM4_RTC_FAN CM4 RTC FAN]]<br\>
如果需要简单使用,或者需要添加到你程序中而不是内核中,参考C和Python例程参考 [[https://www.waveshare.net/wiki/CM4_RTC_FAN 点这里]]<br\>
+
  
 
===RTC===
 
===RTC===
 +
Open the terminal and modify the config.txt file<br />
 +
<pre>
 
  sudo nano /boot/config.txt
 
  sudo nano /boot/config.txt
  #在最后添加
+
</pre>
 +
Add the following lines to the file and modify the audio setting
 +
<pre>
 +
  #Add the lines to the end of file
 
  dtparam=i2c_vc=on
 
  dtparam=i2c_vc=on
 
  dtoverlay=i2c-rtc,pcf85063a,i2c_csi_dsi
 
  dtoverlay=i2c-rtc,pcf85063a,i2c_csi_dsi
  #在dtparam=audio=on前面添加#
+
  #remove the setting dtparam=audio=on by adding the # to the front of the line
 
  #dtparam=audio=on
 
  #dtparam=audio=on
#保存退出,重启
+
</pre>
 +
Save and reboot the Raspberry Pi
 +
<pre>
 
  sudo reboot
 
  sudo reboot
 
+
</pre>
====Hwclock简单使用====
+
====Hwclock====
同步系统时钟 -> 硬件时钟
+
Synchronize system clock -> hardware clock
 +
<pre>
 
  sudo hwclock -w
 
  sudo hwclock -w
 
+
</pre>
同步硬件时钟 -> 系统时钟
+
Synchronize hardware clock -> system clock
 +
<pre>
 
  sudo hwclock  -s
 
  sudo hwclock  -s
#需要关闭网络,或者关闭网络对时,负责会被改回去
+
</pre>
  
设置硬件时钟时间:
+
Note that you need to disable the network synchronization function, otherwise the time will be changed according to network time.<br />
 +
 
 +
Set hardware clock:
 +
<pre>
 
  sudo hwclock --set --date="9/8/2021 16:45:05"
 
  sudo hwclock --set --date="9/8/2021 16:45:05"
 +
</pre>
  
查看硬件时钟
+
Check the hardware clock<br />
 +
<pre>
 
  sudo hwclock -r
 
  sudo hwclock -r
 
+
</pre>
显示版本信息
+
Check the version.<br />
 +
<pre>
 
  sudo hwclock --verbose
 
  sudo hwclock --verbose
 +
</pre>
  
<br\>
+
===Cooling fan===
<br\>
+
The cooling fan will turn for a while when starting, it is normal.<br\>
 
+
There is a third-party project for configuring cooling fan for reference:https://github.com/neg2led/cm4io-fan<br\>
===风扇===
+
<pre>
在上电的时候 风扇会转1秒,然后停止2秒,再转,这是正常现象<br\>
+
风扇目前没有官方的配置方法,有一个第三方配置方法:https://github.com/neg2led/cm4io-fan<br\>
+
此方法为第三方发布,不是官方发布,出现任何问题,概不负责!<br\>
+
 
  mkdir -p ~/src
 
  mkdir -p ~/src
 
  cd ~/src
 
  cd ~/src
Line 340: Line 364:
 
  sudo chmod 777 install.sh
 
  sudo chmod 777 install.sh
 
  sudo  ./install.sh
 
  sudo  ./install.sh
#下面是对于config.txt的描述介绍
+
</pre>
 +
The device tree overlay has a few options, here's the equivalent of a /boot/overlays/README info section:<br />
 +
<pre>
 
  #############################
 
  #############################
 
  Name:  cm4io-fan
 
  Name:  cm4io-fan
Line 358: Line 384:
 
                             at which the fan begins to slow down (default 2000)
 
                             at which the fan begins to slow down (default 2000)
 
   #############################
 
   #############################
或者 直接参考如下:
+
</pre>
 +
For examples, speed up the fan if the temperature is higher than 45°C and set the it to maximum value if the temperate is higher than 50°C:<br />
 +
<pre>
 
  dtoverlay=cm4io-fan,minrpm=500,maxrpm=5000,midtemp=45000,midtemp_hyst=2000,maxtemp=50000,maxtemp_hyst=2000
 
  dtoverlay=cm4io-fan,minrpm=500,maxrpm=5000,midtemp=45000,midtemp_hyst=2000,maxtemp=50000,maxtemp_hyst=2000
温度高于45摄氏度开始加速,高于50摄氏度最高速
+
</pre>
  
 
==CSI  DSI==
 
==CSI  DSI==
CSI  和 DSI默认是关闭的,使用摄像头和DSI的时候会占用I2C-10、I2C-11、I2C-0 三个I2C设备<br>
+
CSI  and  DSI interfaces are closed by default, they will use the I2C-10, I2C-11 and I2C-0.<br>
开机执行如下:<br>
+
Open a terminal and run the following commands:
 +
<pre>
 
  sudo apt-get install p7zip-full
 
  sudo apt-get install p7zip-full
  wget https://www.waveshare.net/w/upload/4/41/CM4_dt_blob.7z
+
  wget https://www.waveshare.com/w/upload/4/41/CM4_dt_blob.7z
 
  7z x CM4_dt_blob.7z -O./CM4_dt_blob
 
  7z x CM4_dt_blob.7z -O./CM4_dt_blob
 
  sudo chmod 777 -R CM4_dt_blob
 
  sudo chmod 777 -R CM4_dt_blob
 
  cd CM4_dt_blob/
 
  cd CM4_dt_blob/
#如果使用两个摄像头和DSI0 执行
+
</pre>
 +
Run the two camera and the DIS0 <br />
 +
<pre>
 
  sudo  dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob-disp0-double_cam.dts
 
  sudo  dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob-disp0-double_cam.dts
#如果使用两个摄像头和DSI1 执行
+
</pre>
 +
Run the two camera and the DSI1 <br />
 +
<pre>
 
  sudo  dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob-disp1-double_cam.dts
 
  sudo  dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob-disp1-double_cam.dts
#在使用任意DSI时,HDMI1没有图像输出,哪怕你没有连接DSI屏幕只要编译的对应的文件,那HDMI1就没有输出了
+
</pre>
#如果需要恢复,删除对应的dt-blob.bin 即可: sudo rm -rf /boot/dt-blob.bin  
+
Notices:<br />
#执行完毕 关闭电源 重启CM4
+
#The HDMI1 cannot work if you have compiled the file for DSI
 +
#To enable the HDMI1 again, please remove the dt-blob.bin file: sudo rm -rf /boot/dt-blob.bin  
 +
#After running, restart the CM4
  
再连接摄像头和DSI屏幕:<br>
+
Connect the Camera and DSI display:<br>
1: 确保断电状态下连接<br>
+
1: Please first turn off the power before connecting<br>
2: 使用[https://www.waveshare.net/shop/CM-DSI-ADAPTER.htm  CM-DSI-ADAPTER ]转接板连接Compute Module 4 PoE Board和DSI屏幕<br>
+
2: Use [https://www.waveshare.com/CM-DSI-ADAPTER.htm  CM-DSI-ADAPTER ] to connect the Compute Module 4 PoE Board and DSI display.<br>
3: 使用[https://www.waveshare.net/shop/RPi-Zero-v1.3-Camera-Cable.htm CSI转接线]转接板连接Compute Module 4 PoE Board和CSI摄像头<br>
+
3: Use [https://www.waveshare.com/RPi-Zero-v1.3-Camera-Cable.htm CSI cable] to connect the Compute Module 4 PoE Board and CSI camera.<br>
3: 连接电源<br>
+
3: Connect the power<br>
4: 等待几秒后屏幕启动<br>
+
4: The display will start after a few seconds.<br>
5: 如果无法启动,检查/boot/dt-blob.bin 是否存在,如果存在再次重启即可<br>
+
5: If the display cannot work, please check if the file /boot/dt-blob.bin has been added to the directory and restart<br>
6: 摄像头需要运行raspi-config,选择Interfacing Options->Camera->Yes->Finish-Yes,reboot系统,打开enable camera,然后重启即可保存修改。<br>
+
6: To use the camera, you should enable the camera by raspi-config, choose Interfacing Options->Camera->Yes->Finish-Yes and then reboot.<br>
  
参考
+
Testing
  
测试树莓派摄像头
+
Test the first camera:<br />
查看接入的第一个摄像头画面:
+
<pre>
 
  sudo raspivid -t 0 -cs 0
 
  sudo raspivid -t 0 -cs 0
查看接入的第二个摄像头画面:
+
</pre>
 +
Test the second camera:<br />
 +
<pre>
 
  sudo raspivid -t 0 -cs 1
 
  sudo raspivid -t 0 -cs 1
 
+
</pre>
 
+
 
+
参考[https://www.raspberrypi.org/documentation/hardware/computemodule/cmio-camera.md  CSI相机]
+
[https://www.raspberrypi.org/documentation/hardware/computemodule/cmio-display.md  DSI显示器]
+
 
+
-->
+

Latest revision as of 09:52, 11 September 2021

Writing Image

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

USB TO UART

The USB to UART port is connected to GPIO14(BCM) and GPIO15(BCM) pins of CM4 with a converter.
You can connect the USB to the UART port for login CM4 via serial.
The USB to UART port can also be used for power, in this case, you need to solder a 0ohm resistor to the pad for enabling the powering function.
Compute Module 4 PoE 4G Board 6.png

Buzzer/LED

Buzzer

The buzzer is connected to GPIO22(BCM), low active.

Compute Module 4 PoE 4G Board 4.png

LED

Two LEDs are integrated for users, the green one is connected to GPIO20(BCM)and the red one is connected to GPIO21(BCM), low active.

Compute Module 4 PoE 4G Board 5.png

4G/5G

To work with 4G/5G, you need to connect a wireless module to the M.2 B KEY for featuring corresponding functions. M.2 B KEY only extends USB2.0 interfaces, it doesn't support PCIe devices.
Compute Module 4 PoE 4G Board 3.png
SIM card is required to work with the 4G/5G module
This carrier board supports the 4G module by default, if you use it with 5G modules, some of the 5G functions are not supported.
If you use a 5G module, please check the [SIM8200EA-M2_5G HAT wiki] about how to set up 5G.

If you need to toggle the working status of the 4G module, you can control the GPIO6(BCM), set the GPIO6 to High for disabling the 4G module and set it to Low for enabling.
To toggle the working status of the 4G module, please add delay time for waiting for the operation to work.
If you use the 5G module, the GPIOs cannot work for it.

SIM7600 M.2 module

Status of M.2 indicators:

M.2_NET M.2_STA
Red LED Green LED Status
Solid OFF Power OFF
Solid OFF Starting
Solid Solid SIM card is an invalid or weak signal
Solid Blink Working
OFF Blink/Solid Shutdowning

Before you configure the SIM7600 module, please make sure that the module is started normally.

sudo apt-get install minicom
sudo minicom -D /dev/ttyUSB2

Type the following command on the minicom

AT+CUSBPIDSWITCH=9011,1,1

Close the minicom and configure usb0

sudo dhclient -v usb0

About RNIDS networking, please refer to [Raspberry Pi networked via RNDIS RNIDS Networking method]
With the operations above, a USB0 port will be recognized.
If the network cannot work, please try to switch frequency with the following AT commands:

 AT+CNBP=0x0002000000400183,0x000001E000000000,0x0000000000000021
 AT+CNBP=0x0002000000400180,0x480000000000000000000000000000000000000000000042000001E200000095,0x0000000000000021

AT Commands

If the network cannot work, plaese check module with AT commands

sudo apt-get install minicom
sudo minicom -D /dev/ttyUSB2

Common AT commands

Command Description Return
AT AT test OK
ATE ATE1 enable echo
ATE0 disable echo
OK
AT+CGMI Check manfacture OK
AT+CGMM Check module type OK
AT+CGSN Check SN OK
AT+CSUB Check module version OK
AT+CGMR Check firmware version OK
AT+IPREX Configure hardwara baud rate +IPREX:
OK
AT+CRESET Reset module OK
AT+CSQ Check signal quanlity +CSQ: 17,99
OK
AT+CPIN? Check SIM status +CPIN: READY
AT+COPS? CHeck the current supplier +COPS:
OK
AT+CREG? Check network status +CREG:
OK
AT+CPSI? Check UE information
AT+CNMP Configure network mode:
2:Automatic
13:GSM only
38:LTE only
48 : Any modes but LTE
... ....
OK

For more AT commands, please refer to: AT_Command_V2.00
You can also refer to:SIMCom

PCIE

The PCIe interface is PCIe 2.0 X1, the maximum speed is 500Mb/s
Most of the PCIEx1 device is not supported by Raspberry Pi without a driver.
Please check your PCIe device before you used Supported device testing
Raspberry Kernel compiling

Isolation GPIO/I2C

Isolation output pins are GPIO17 (BCM) and GPIO27(BCM)
Isolation input pins GPIO23 (BCM) and GPIO24(BCM)
Compute Module 4 PoE 4G Board 8.png

Configure the logic voltage of Isolation IO
Compute Module 4 PoE 4G Board 10.pngCompute Module 4 PoE 4G Board 9.png

Isolation I2C pins are GPIO2/3(BCM),I2C bus is I2C1,
Compute Module 4 PoE 4G Board 7.png


【Expected result】

The two OUT pins troggle in order
Read the values of two IN pins

【python example】

cd IO/python
sudo python main.py

【C example】

cd IO/c
make clean
sudo make
sudo ./main



Isolation ADC

The isolation ADC is mounted in isolation I2C with 0x48 address
I2C is default disabled, please refer to #Enable I2C to enable the I2C interface.

C

 cd ADC/c/
 sudo ./main 

python

 cd ADC/python/
 sudo python examples/main.py
  • Run the commands above to run the example

Expected result

Output voltage vlaue

Note: the ADC chip used is ADS1113, its reference voltage is 2.048V, the range of differential input.



CAN

The CAN is diabled by default, you need to modify the config.txt file for enabling it.

 #Open and edit config.txt
 sudo nano /boot/config.txt
 #Add the following line to the file and save
 dtparam=spi=on
 dtoverlay=mcp2515-can0,oscillator=16000000,interrupt=25
 #reboot Raspberry Pi
 reboot 

After rebooting, run the following command:

 dmesg | grep spi0

600px Run the following command:

sudo ip link set can0 up type can bitrate 1000000
sudo ifconfig can0 txqueuelen 65536
ifconfig

600px If the device can0 is recognized, it means that the driver was installed successfully

Testing

Install can-utils:

 sudo apt-get install can-utils

Receive data

 candump can0

Send data

 cansend can0 000#11.22.33.44
 #11.22.33.44 is data sent
 #If you need to transmit more dta, you can also extend the data just like this:
 # cansend can0 000#11.22.33.04.70

Examples

【Python examples】

  • Go into the directorty of python example:
  • Open a terminal as receiver and run the receive.py:
sudo python reveive.py
  • Open another terminal as sender and run the send.py:
sudo python send.py

The examples provided is absed on python, please make sure that you have installed the python-can library.
Create a CAN device before you send data.:

os.system('sudo ip link set can0 type can bitrate 100000')
os.system('sudo ifconfig can0 up')
  • Step 1: Connect to the CAN bus
can0 = can.interface.Bus(channel = 'can0', bustyp = 'socketcan_ctypes')
  • Step 2: Create information
msg = can.Message(arbitration_id=0x123, data=[0, 1, 2, 3, 4, 5, 6, 7], extended_id=False)
  • Step 3: Send message

can0.send(msg) </pre>

  • Close the CAN device finally
os.system('sudo ifconfig can0 down')
  • Receive data:
msg = can0.recv(10.0)

recv() defines the timeout
for more details, please refer to https://python-can.readthedocs.io/en/stable/interfaces/socketcan.html

【C examples】

  • Blocking receive, open the terminal of Raspberry Pi and run the following commands:
cd CAN/c/receive/
make clean
sudo make
sudo ./can_receive
  • Send data, open a terminal of Raspberry Pi and run the following commands:
cd CAN/c/receive/
make clean
sudo make
sudo ./can_send



RS485/232

The interface is closed by default, you can modify the config.txt to enable it.

sudo nano /boot/config.txt

Add the following lines to the config.txt file:

 dtoverlay=uart3
 dtoverlay=uart5

Reboot the Raspbery Pi and check if the ports are recognized.

 reboot 
 ls /dev/ttyAMA*

RS232 interfaces use the GPIO5/GPIO4(BCM4/5), recognized as ttyAMA1
RS485 interfaces use the GPIO13/GPIO12(BCM13/12),recognzied as ttyAMA2

Test

Install minicom and test it with the minicom

 sudo apt-get install minicom
 # RS232
 sudo minicom -D /dev/ttyAMA1
 #RS485
 sudo minicom -D /dev/ttyAMA2

RTC FAN

  • Note:Please fiest connect the FAN and then the power, otherwise you may damage the controller of fan!
  • Note: Please make sure the operation voltage of the cooling fan is the same as the carrier board.

Note that if you want to use the RTC function, please first disable the DSI and CSI.
If you want to use them at the same time, please change the I2C to I2C1 (the right)
Compute Module 4 PoE 4G Board 11.png
You need to modify the codes and driver after changing.
The demo codes use I2C10 by default (the left)

Please refer to the wiki of CM4_RTC_FAN about how to control the cooling fan and the RTC [CM4 RTC FAN]<br\>

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

The cooling fan will turn for a while when starting, it is normal.<br\> There is a third-party project for configuring cooling fan for reference:https://github.com/neg2led/cm4io-fan<br\>

 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 examples, speed up the fan if the temperature is higher than 45°C and set the 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

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:

 sudo apt-get install p7zip-full
 wget https://www.waveshare.com/w/upload/4/41/CM4_dt_blob.7z
 7z x CM4_dt_blob.7z -O./CM4_dt_blob
 sudo chmod 777 -R CM4_dt_blob
 cd CM4_dt_blob/

Run the two camera and the DIS0

 sudo  dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob-disp0-double_cam.dts

Run the two camera and the DSI1

 sudo  dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob-disp1-double_cam.dts

Notices:

  1. The HDMI1 cannot work if you have compiled the file for DSI
  2. To enable the HDMI1 again, please remove the dt-blob.bin file: sudo rm -rf /boot/dt-blob.bin
  3. After running, restart the CM4

Connect the Camera and DSI display:
1: Please first turn off the power before connecting
2: Use CM-DSI-ADAPTER to connect the Compute Module 4 PoE Board and DSI display.
3: Use CSI cable to connect the Compute Module 4 PoE Board and CSI camera.
3: Connect the power
4: The display will start after a few seconds.
5: If the display cannot work, please check if the file /boot/dt-blob.bin has been added to the directory and restart
6: To use the camera, you should enable the camera by raspi-config, choose Interfacing Options->Camera->Yes->Finish-Yes and then reboot.

Testing

Test the first camera:

 sudo raspivid -t 0 -cs 0

Test the second camera:

 sudo raspivid -t 0 -cs 1