Yeah, I'm aware of the power issue.. I am powering mine correctly. I made this thread: viewtopic.php?f=34&t=24072
Nicely detailed. Well done!
It just didn't work when I tried. I plugged in two thumb drives, only one showed up. I plugged in two hard drives, only one showed up. I plugged in a thumb drive and a hard drive, only one showed up. I tried changing the USB host settings in WinCE and got the same results.
Oh well, it doesn't concern me that much.
Without delving too much into usb power technologies, it can be a non-compliant hub or devices that create the problem. When a device is plugged in, a certain dialog takes place between port and device. A mis-identification at that stage and incorrect recognition of whether the device is defined as high-power or low-power, might block any further devices from being recognized.
So in case the one device is reported already as high power, the port will not allow any further devices as part of its current protection mechanism, even if in fact the device consumes less then the max 500ma.
Can't say why exactly it didn't work in your testing, but for sure we know its consistent ![]()