Hi Richard, The 9th byte of the USB_CONFIGURATION_DESCRIPTOR indicates the power (value is mA x 2), so for high power this value should be set to 250 (=500mA) I will add a new constant to the USB library in which you can specify the power (probably somewhere next week). Albert
On Jan 30, 9:41 pm, Richard <[email protected]> wrote: > Hi Albert, > > As you are the USB expert and writer of the usb libs i have a > question. > Normally an USB (2.0) delivers 100mA output current but its possible > to increase it to 500mA (for high power devices) only off course if > the power is available on the providing bus. > For high output current a request must be made during initialization > of the USB device to the hub. > I can not find it in you libs (because I don’t know what to look > for :) ), so I don’t know if you have already provide this option, but > if not I was hoping you could include it. > If provided could you explain how to activate high power output. > > It would be I nice option for Jaluino if powered from USB and of > course other hardware projects (it could save you a power device) :) > > Thanks in advance > > Greetz > > Richard -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
