How to change U-Boot and kernel splash screen in DEY 5.0 (ConnectCore 91)?

Embedded Devices
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Hello Digi team,

we are using ConnectCore 91 (CC-WMP157-KIT) with Digi Embedded Yocto 5.0 (DEY-5.0-r0) and we’d like to replace the default splash screen shown at boot (both U-Boot and Linux kernel).

We’ve checked the documentation at
:backhand_index_pointing_right: https://docs.digi.com/resources/documentation/digidocs/embedded/dey/5.0/cc91/yocto-make-changes-to-project_c.html Questions:

  1. Is it enough to replace a single .bmp file (e.g. splash.bmp) and rebuild U-Boot or the image?

  2. If so, where exactly is this file located in the source tree or recipe path (for both U-Boot and kernel)?

  3. Or does DEY 5.0 use another splash system (e.g. psplash, plymouth, etc.) instead of the classic logo mechanism?

We already tried adding a .bbappend for u-boot-dey with our custom splash.bmp, but the image was not displayed.

Any clarification or short guide on the correct procedure would be greatly appreciated.

Thanks,

2

To replace the default splash screen shown at boot (both U-Boot and Linux kernel) on the ConnectCore 91, you will need to customize both the U-Boot bootloader and the Linux system. While the provided documentation references general customization topics for U-Boot and Linux on ConnectCore 91, it does not include step-by-step instructions specifically for changing the splash screen.

For U-Boot customization, you can refer to the following documentation:

For Linux customization, see:

Typically, replacing the splash screen involves:

  1. For U-Boot: Replacing the logo image file in the U-Boot source and rebuilding U-Boot.

  2. For Linux: Updating or replacing the splash image used by the framebuffer or bootsplash utility in your Yocto build.

To replace the default splash screen shown at boot (for both U-Boot and the Linux kernel) on the ConnectCore MP157, you will need to customize both the U-Boot bootloader and the Linux system. Digi provides documentation for customizing U-Boot and Linux for ConnectCore MP15 platforms:

These guides will walk you through updating the splash screen image and making any necessary configuration changes.