Inital commit, far from complete
This Bootloader is a replacement for the MKS series TFT screens which use stm32f407VET chips and not the 107/103 chips like in other models.
Use platformio to build,
can be found in buildroot/SDCARD/firmware.bin
MKS TFT3.5 V1
MKS TFT3.5 V3
MKS TFT2.8 Any Version
MKS TFT 7 Any Version
I would not have to waste my time writing bootloaders for MKS screens if they would just release the source code,
not that crappy attempt that they did where they dumped broken code expecting us to all to bow to the Open sources gods,
If you want to see how it's done MKS then look at bigtreetech, but as i'am porting all your boards over to the BTT firmware
and rewriting all the bootloaders , am saving your boards for you. /Rant over/