Posts made by george

Test tools

Canutils is a commonly used CAN communication testing toolkit that includes five independent programs: canconfig, candump, canecho, cansend, and cansequence. The functions of these programs are briefly described as follows:

• canconfig
  The parameters used to configure the CAN bus interface mainly include baud rate and mode.

• candump
  Receive data from the CAN bus interface and print it in hexadecimal format to standard output, or output it to a specified file.

• canecho
  Resend all data received from the CAN bus interface to the CAN bus interface.

• cansend
  Send the specified data to the specified CAN bus interface.

• cansequence
  Automatically repeat the increment number to the specified CAN bus interface, or specify the receive mode and verify the received increment number.

• ip
  Configuration of CAN baud rate, functions, etc.

Common commands

• Query current network devices:

ifconfig -a

• CAN start:

ip link set can0 down  //Close CAN
ip link set can0 type can bitrate 500000 //Set bit rate of 500KHz:
ip -details -statistics link show can0 //Print can0 information:
ip -details -statistics link show can0 //Start CAN:

• CAN sending:

Send (standard frame, data frame, ID: 123, date: DEADBEEF):

cansend can0 123#DEADBEEF

Sending (standard frame, remote frame, ID: 123):

cansend can0 123#R

Send (extended frame, data frame, ID: 0000123, date: DEADBEEF):

cansend can0 00000123#12345678

Sending (extended frame, remote frame, ID: 0000123):

cansend can0 00000123#R

• CAN reception:

Start printing and wait for reception:

candump can0

@wuming dmesg打印一份传上来，这种情况是没有识别到摄像头模组。

@jugg 这个版本还没有增加。

@george 如下代码测试正常：

import cv2 as cv2
cap = cv2.VideoCapture(11)
while True:
    success, img = cap.read()
    cv2.imshow("Video", img)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
cap.release()
cv2.destroyAllWindows()

@Mz3D-0 It can be launched in mid June and is currently in the debugging stage.

@wuming 先使用QV4L2打开video11节点，系统默认已经安装。

@jugg 图片使用的是AP6275S就是WIFI6的模组

• Picture first
  
  
  

• 4G-32G Memory Capacity Replacement.

• The WIFI module is replaceable and supports models such as 2.4G 5G WIFI6.

• EMMC module supports up to 256G.

@Mz3D-0 Both CP4 and CM5 already support 32G/256G configurations and can be purchased directly from an agent.

@jugg 22.04对应的版本如下：

sudo apt-get install ocl-icd-libopencl1=2.2.14-3

@wuming 内核同步到最新，确认系统可以生成video11节点。mipi摄像头默认的设备节点是video11
然后运行如下命令更新ISP库：

sudo apt-get update
sudo apt-get dist-upgrade

@jugg ubuntu的系统版本？

@jugg 你的系统版本是多少？

@jugg 按照如下命令回退包版本：

sudo vim /etc/apt/sources.list.d/george-coolpi-ubuntu-mali-g610-lunar.list

屏蔽掉如下安装源：

sudo apt-get update
sudo apt-get install ocl-icd-libopencl1=2.3.1-1
sudo apt-get install ocl-icd-opencl-dev
sudo apt-get install ocl-icd-dev

@jugg 这几个是FFMPEG的解码库？贴出来你的文件看一下。

@JohnConnor 飞线可以。

@JohnConnor 封装不对。

@JohnConnor 如下链接地址可以直接购买：
https://so.szlcsc.com/global.html?k=XT25Q64DSSIGU&hot-key=RB520S30T1G

@jugg 也可以尝试在驱动的makefile里边禁用掉如下配置：

CONFIG_POWER_SAVING = n

@jugg 如下图所示，电脑的line out输出经过衰减以后接入COOLPI耳机座的MIC输入端。正常麦克风的电平范围控制到20mv以内。所以电阻参数根据电脑line out输出的信号幅度决定。

@jugg 电脑输出的音频信号需要衰减以后才能接入MIC通道。否则增益太大会失真。

@jugg
1.可以把RTL8822BU接入树莓派测试。RTL8821CU的卡会很快支持，后续两个型号一致的情况对比，这个更客观一些。
2.测试的时候建议关闭蓝牙功能

@jugg 不行，这种三段插入以后MIC引脚就和GND短接了，肯定录不到声音。

@jugg 如下图所示，COOLPI录音接口是MIC输入而不是line-in功能，如果要实现line-in功能，需要把电脑的左右声道混音以后衰减然后从coolpi耳机插座的麦克风端接入。

@jugg 如下测试命令录音正常，使用苹果4断耳机：

coolpi@Ubuntu:~$ arecord -D hw:2,0 -d 10 -f cd -r 44100 -c 2 -t wav test.wav
Recording WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
coolpi@Ubuntu:~$ aplay test.wav 
Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo

@elf
IMX219
https://m.tb.cn/h.UEn5Tbe?tk=vJdxdL2wsjZ
OV5647
https://m.tb.cn/h.UDYh0TE?tk=FUwydL2x1L

@jugg 先排除一下电源问题。提供测试命令。

@elf 4b的机器兼容树莓派只能支持2LINE，每line速率2.5G，CM5的机器可以支持2个4line或者4个2line的摄像头模组。

@jugg 0508是23.04版本

@jugg 可以使用最新0424版本的系统测试。