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    1. Cool Pi For You
    2. zehui
    Z
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    zehui

    @zehui

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    Latest posts made by zehui

    • RE: 刷了系统不启动,怎么回事?

      @george It's fine for me—as a TrustZone developer, I always use a custom U-Boot and build the entire system myself.

      However, it's good to keep this as a note to inform other developers.😊

      posted in Pi 4B
      Z
      zehui
    • RE: 刷了系统不启动,怎么回事?

      @Neozy Because the other images are split into two partitions:

      1. Boot partition (starting at 0x4000): contains the Linux image and DTB files.
      2. Rootfs partition (starting at 0x84000): contains kernel modules and binaries, but has an empty /boot directory.

      This layout is somewhat uncommon, as most distributions place the kernel image and DTB files directly under the /boot directory within the root filesystem. As a result, you may need to modify the boot script of your bootloader (e.g., U-Boot) to account for this partitioning scheme.

      posted in Pi 4B
      Z
      zehui
    • RE: 刷了系统不启动,怎么回事?

      @george @emtohere 我看了一些镜像的内容,发现你们一些镜像实际搞了两个分区
      1)boot:从0x4000开始,image,dtb,ramfs都放在这里
      2)rootfs:从0x84000开始,linux就放在这里,然后boot下面是空的
      而armbian就按照正常的Linux distro那样,把image、dtb,ramfs放到rootfs的boot下面,所以导致了只有armbian能够启动。

      如果要刷你们的镜像的话,bootloader就需要改一下。比如U-Boot那边改一下启动脚本什么的。

      posted in Pi 4B
      Z
      zehui
    • RE: COOLPI notebook GPU acceleration

      @mtiqbal Sorry I don't know either, maybe ask official for help @george

      posted in PI CM5 Laptop
      Z
      zehui
    • RE: COOLPI notebook GPU acceleration

      @mtiqbal try this link: https://coolpi-my.sharepoint.com/personal/coolpi_coolpi_onmicrosoft_com/_layouts/15/onedrive.aspx?ga=1&id=%2Fpersonal%2Fcoolpi_coolpi_onmicrosoft_com%2FDocuments%2Fcoolpi%2Fcoolpi%2FCoolPi CM5 NOTEBOOK V20%2FUbuntu

      Or you can manually navigate to the file:

      1. click one drive on the top bar of the forum:
        771108ff-1692-4648-8c56-36ec87a67a13-image.png

      2. navigate to the right path, and download the 3.10 GB file:
        29156487-68dc-45c4-97fe-6913ddcb3732-image.png

      posted in PI CM5 Laptop
      Z
      zehui
    • RE: 刷机遇到切换存储emmc失败

      @mxpfeng 可以仿照这个,我理解5b的串口配置应该都差不多。
      https://cool-pi.com/topic/26/coolpi-4b-debug-console串口接线配置说明?_=1715909783162

      然后这种串口转USB的线淘宝上随便两三块钱买一个就好: 【淘宝】https://m.tb.cn/h.g2Q4mDj?tk=K3ZoWF1EmbK CZ3452 「黑PL2303HX USB转TTL RS232模块升级 USB转串口下载线中九刷机线」
      点击链接直接打开 或者 淘宝搜索直接打开

      posted in Pi CM5
      Z
      zehui
    • RE: 刷机遇到切换存储emmc失败

      @mxpfeng 会接uart吗?接串口然后用windterm这些工具查看一下串口日志可能会有帮助。

      posted in Pi CM5
      Z
      zehui
    • RE: RKDevTool和rkdeveloptool的功能区别

      @george
      所以我可以这么理解么?
      1)当前coolpi-4b只支持从SPINOR Flash引导,我们的bootloader必须刷入SPINOR FLASH中,如果我选择清空SPINOR FLASH的话那整个板子启动就直接进入Maskrom模式。
      2)coolpi-loader项目中提供的引导能力是基于rockchip的miniloader的,自定义SPL loader目前还不太可行

      posted in Pi 4B
      Z
      zehui
    • RKDevTool和rkdeveloptool的功能区别

      因为个人使用的是arm64的linux电脑或者一个Mac,所以能够使用的工具就是rkdeveloptool了。
      现在有一个问题就是我直接使用rkdeveloptool去写入镜像(就下述命令)

      sudo rkdeveloptool wl 0 ${some image}
      

      写入完成后我的coolpi4b是没有反应的,启动后直接再次进入maskrom模式。

      然后借了台Windows电脑用RKDevTool去执行按照地址写入整个镜像(同一个镜像文件),就成功启动了。。。

      我想知道这两个工具写入有什么区别?

      PS:镜像是Armbian_23.02.0
      57ed6d11-00e5-45bd-813e-c4cb584cb415-image.png

      posted in Pi 4B
      Z
      zehui
    • 自定义bootloader

      背景:需要自定义tee os(使用OPTEE而不是rockchip的TEE),所以想要定制bootloader。
      我之前有个rock pi 4b,然后其启动流程就如同这里所示:https://opensource.rock-chips.com/wiki_Boot_option,基于这个wiki我们构建了一个基于官方TEE的启动镜像。
      不过现在想知道在RK3588S的coolpi上是否也是一样的启动流程,如果地址或者流程不一样的话,能否告知一下coolpi 4b的启动流程呢

      posted in Pi 4B
      Z
      zehui