Can't get a custom compiled firmware to work Ender 3 S1 F4

[otkaz]

Hi, I'm wanting to compile a custom version of this firmware, but I'm having issues. Every time I compile and load it on my SD card to flash, the screen just comes up like this

and never changes until I load one of mricoc's pre-compiled binaries and flash that. For trouble shooting I ditched all of my custom changes and cloned the Special_Configurations repo and checked out New-Year-2024-compatible-version I checked options Ender3S1, 301F4, BLT, UBL, DACAI, and T1. I cloned the Firmware repo and checkout out tag 20240122. I copied the platform.ini, Version.h, Configuration.h and Configuration_adv.h to the proper folders in Ender3V2S1 and used the auto build marlin plugin for VS-code to build a binary. I tied both options STM32F401RC_creality (256k) and STM32F401RC_nobootloader_creality (256k) both build with no errors but both also will not flash. It just sits on the creality screen. this is the pre built binary I use that flashes successfully
https://github.com/mriscoc/Ender3V2S1/releases/download/20240122/Ender3S1-F4-UBL-20240126.bin

I am very use to building and flashing Marlin on my other printer. I don't know what I'm doing wrong and was hoping someone else could spot what mistake I'm making?

[mriscoc]

Do not use the nobootloader version, that is for special boards where the bootloader was erased and the firmware will be loaded by using a external programmer.

[otkaz]

@mriscoc Do you think you could send me the exact config files you used to build https://github.com/mriscoc/Ender3V2S1/releases/download/20240122/Ender3S1-F4-UBL-20240126.bin ?
the ones here https://github.com/mriscoc/Ender3V2S1/tree/Ender3V2S1-Released/configurations/Ender3S1-F4 are not for the UBL build.

[mriscoc]

You need to select FreeFlash in the Configurator.

[otkaz]

You need to select FreeFlash in the Configurator.
I don't see any option for FreeFlash?

[otkaz]

I found that the freeflash option was just added in Jan 2025
mriscoc/Special_Configurations@5b8e0a3
so its not available on the New-Year-2024-compatible-version branch which I read I had to use with this build. I just checkout out the main branch and I'm getting build errors when using it but I'll figure it out. I should have everything I need now to figure out what the config options for https://github.com/mriscoc/Ender3V2S1/releases/download/20240122/Ender3S1-F4-UBL-20240126.bin were.
Thanks for your help @mriscoc

[mriscoc]

You can download the FreeFlash.json file and put it inside of the _features folder.