Ok so I am learning, and of course all of you guys already know this ...
There are even USB drivers for this.... That failsafe mode is called "RockUSB mode" and there is a rockchip tool that can perform the MLC flash programming from the PC, when we are in that mode. Well well well !!! That's great news
I see that we even have the USB drivers for that special mode, although i would only use them to understand how the protocol works.
Knob, could you tell me the sequence to get our MPx player in this mode ?
I guess we don't have the source code of that rockchip tool, so the next step is to use a USB packet analyzer on the PC, in order to see how it uploads the boot code into rockchip's RAM.
This is one of the doors for complete control of the Rockchip players !
It is probable that we could use the libUSB drivers instead of the rockchip "RockUSB mode" drivers and then talk to the device.
Maybe it has already been done ? I don't want to re-invent the wheel .....