Hi,
we are currently working here on a SA-1110 based PDA that will
come out soon. While fighting against USB, I faced the following
problem.
The system:
SA-1110 based PDA, USB over Serial Port 0 (UDC)
Linux 2.4.18-rmk4
Drivers in use: sa1100usb_core, usb_char
Power consumption: up to 450 mA
The problem:
After the device is in configured state, I would like to get
the power from USB host instead of consuming the local batteries.
If I understand the USB Specification 1.1 correctly, this
requires changing the power-source from self-powered to
bus-powered and setting the power maximum to 500mA (while
switching to address state again).
The question:
Is there already any code somewhere that implements this?
And in this case: where do I have to look for it or what
can I do to activate it?
Regards
Florin Spanachi
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