Do you have flash area bootloader using usb port?

[lepagats]

I've ported ucos-ii to AT91SAM7S256 evaluation board using SAM-BA V1.8 downloader. My IDE tool is RVDS V2.2 Evaluation Version.

But SAM-BA downloader has a very critical problems as everybody know.

It need reloading boot loader from SAM-BA bootloader that is in ROM area after downloading to flash area(0x00100000) using SAM-BA downloader.

I think we need another downloading skill and tools.

Does anybody have a good bootloader for ucos-ii development using USB port?