@zehui
启动的流程是一样的，目前uboot的结构如下：

FIT description: FIT Image with ATF/OP-TEE/U-Boot/MCU Created: Wed Feb 28 09:32:41 2024 Image 0 (uboot) Description: U-Boot Created: Wed Feb 28 09:32:41 2024 Type: Standalone Program Compression: uncompressed Data Size: 1389728 Bytes = 1357.16 KiB = 1.33 MiB Architecture: AArch64 Load Address: 0x00200000 Entry Point: unavailable Hash algo: sha256 Hash value: e8eeabe5b2891390396b4cb77a33c5bb8da03b1da33a64274a077cf386f2b5aa Image 1 (atf-1) Description: ARM Trusted Firmware Created: Wed Feb 28 09:32:41 2024 Type: Firmware Compression: uncompressed Data Size: 200008 Bytes = 195.32 KiB = 0.19 MiB Architecture: AArch64 Load Address: 0x00040000 Hash algo: sha256 Hash value: c902200be1343fe569e54778c286005b1c6163606664c463a24d787be4376966 Image 2 (atf-2) Description: ARM Trusted Firmware Created: Wed Feb 28 09:32:41 2024 Type: Firmware Compression: uncompressed Data Size: 24576 Bytes = 24.00 KiB = 0.02 MiB Architecture: AArch64 Load Address: 0xff100000 Hash algo: sha256 Hash value: 225d6bf0712f850648223365ba06a73ba5f6315fb8a9580f23ab48ece795f91e Image 3 (atf-3) Description: ARM Trusted Firmware Created: Wed Feb 28 09:32:41 2024 Type: Firmware Compression: uncompressed Data Size: 24576 Bytes = 24.00 KiB = 0.02 MiB Architecture: AArch64 Load Address: 0x000f0000 Hash algo: sha256 Hash value: aa71013e72d7ab4be264c1093b155ef06e65d0a263d552be25b13c8ddf285586 Image 4 (optee) Description: OP-TEE Created: Wed Feb 28 09:32:41 2024 Type: Firmware Compression: uncompressed Data Size: 465304 Bytes = 454.40 KiB = 0.44 MiB Architecture: AArch64 Load Address: 0x08400000 Hash algo: sha256 Hash value: 66e30bf9e879405a49797aaa6c08ca1c41aa325443e910af42e3df309e65909b Image 5 (kern-fdt) Description: cp4/uboot.dtb Created: Wed Feb 28 09:32:41 2024 Type: Flat Device Tree Compression: uncompressed Data Size: 141854 Bytes = 138.53 KiB = 0.14 MiB Architecture: AArch64 Hash algo: sha256 Hash value: ba43bc47ab29f0cbcba25658712ac3d3c6349a30486c76d5b720310e58f02de3 Image 6 (fdt) Description: U-Boot dtb Created: Wed Feb 28 09:32:41 2024 Type: Flat Device Tree Compression: uncompressed Data Size: 7065 Bytes = 6.90 KiB = 0.01 MiB Architecture: AArch64 Hash algo: sha256 Hash value: 987a71d492c0045c4964bbed7799da0eee5276a2b60b5a1335fc2d37fdfcf944 Default Configuration: 'conf' Configuration 0 (conf) Description: rk3588s-cp4 Kernel: unavailable Firmware: atf-1 FDT: fdt kern-fdt Loadables: uboot atf-2 atf-3 optee

@gongxing 5v/12v都可以供电

@zehui 多交流，共进步

同问。怎么实现在cm5或者coolpi4B 中实现opencl编程？

@hyx 可以看看日志排查启动慢的原因，主要开销花在哪个部分。

@george 又接了一个USB麦克风 也不能录 提示同样的错误
只能重启 重启后也只能录一次 第二次就不能录了
后面又测试了一下 发现是因为在开机之前接了一个显示屏和一个HDMI显示器 开机之后再把HDMI拔掉之后再录音
就出现上面的情况

@大法师 谢谢！搞定了
ubuntu 20没有/etc/rc.local，需要

新建service
sudo vim /etc/systemd/system/rc-local.service [Unit] Description=/etc/rc.local Compatibility ConditionPathExists=/etc/rc.local [Service] Type=forking ExecStart=/etc/rc.local start TimeoutSec=0 StandardOutput=tty RemainAfterExit=yes SysVStartPriority=99 [Install] WantedBy=multi-user.target

2.使能service
sudo systemctl enable rc-local.service
3.新建/etc/rc.local
sudo vim /etc/rc.local
并需要操作的命令加进去
4.启动服务
sudo systemctl start rc-local.service
sudo systemctl status rc-local.service

@jugg 进入MSC模式直接用WINDOWS工具格式化就好了。

@jugg
搜索WWAN
Screenshot from 2023-11-27 18-20-53.png

@hangman 不是修改cmdline.txt，应该更新extlinux/extlinux.conf

@edwardzhou
从log信息看USB设备还是有兼容性问题，识别的时候有报错，如果手上有USB hub可以串接hub再测试。或者换一个USB摄像头模组确认一下问题。

@hangman 可能是读卡器兼容性问题，之前有测试过的读卡器如下链接：【淘宝】https://m.tb.cn/h.5kZgqBq?tk=DvWdWeDZbHp CZ3457 「SD卡TF卡USB3.0高速二合一读卡器手机相机内存卡行车记录仪GL3224」
点击链接直接打开 或者 淘宝搜索直接打开

@airobot机器人开发 谢谢分享。

@jack_admin windows下使用

@airobot机器人开发 好的！正常编译完内核以后需要把modules.tar.gz 解压到文件系统的/lib 目录，这里边主要是一些驱动的ko文件。

@george 十分感谢

Maybe I expressed myself badly. What I wanted to ask is if it is possible to power the device and output video at the same time using one of the usb ports. I don't intend to draw power from the device but to give power to the device (and output video).

@jack_admin 可以了，系统跑起来了，谢谢。