Is USB Host mode supported on the latest firmwares on the A81E? (over the sole USB port, the mini one.) (A81E = older model before the full-sized USB A port was added.) I think I read that maybe the A81E USB host mode can work for data, but it can't send power. I've looked around the forum a lot but could not get a clear answer.I have:-my A81E with with a Female-Mini-B USB port-a Mini-Male-B (what goes into the A81E) to Female-A USB cable. (I've confirmed this cable works with a convoluted A to A setup.) (See image below.)-I can plug into the cable my standard Male-A devices like my basic USB keyboard, USB flash drives, and my USB flash light. However on my A81E running the stock 1122 ROM:-These USB devices never seem to get power-They never light up-They never work in any way.-The A81E never seems to register them (eg. I never see a /dev/sda device for my flash drive.)-I've tried resetting the device completely by removing the AC power connector and the battery, then reinserting them, plugging in my usb cable/device, and then turning the system on. Still nothing happens with the USB devices. -Hooking my A81E upto my desktop seems to work fine, the debugger option immediately pops up on my A81E.Any advice?
One big hurdle is that the A81E can't provide 5V as its bty maxes out at 4.07V and would be around 3.7V under load.You might try a powered hub which would solve the power issues.
Thanks Mikedep333 for asking the questions - I too am seeking answers to the same !BTW are you ROOTED, as I read somewhere that it is necessary for the mini uSB port to work.Hi linw - when you say "powered hub", how do I connect it up - does it have its own power cord or thru USB to laptop? Thanks.
Linw, actually you can get 5Vout of 3.7V using a DC-DC converter, or a charge pump. I suspect wits has added that circuitry to the A81G. Otherwise, as you mention, you have to use a powered hub , as is the case with the A81E.Figured this out while I was exploring how to add a full USB spec. (ie 5V) port to my A81E.Here is a 300mA version that will take 1.5V-4V and convert to 5V. http://www.sparkfun.com/products/8290
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