Am Do 29. Mai 2008 schrieb Michael Shiloh: > > Andy Green wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA1 > > > > Somebody in the thread at some point said: > > | Am Mi 28. Mai 2008 schrieb Brad Midgley: > > |> Joerg > > |> > > |> On Wed, May 28, 2008 at 2:30 AM, Joerg Reisenweber <[EMAIL PROTECTED]> > > | wrote: > > |>> Am Mi 28. Mai 2008 schrieb Brad Midgley: > > |>>> i think it may still be up in the air > > |>> Nope it's not, see Y-cable in wiki. Should work perfectly. You just > > have > > | to > > |>> find the 5pin-mini-USB-plug to DIY one. > > |> is EN_USBHOST is deasserted by the system automatically now? I'll > > |> update the section in > > |> http://wiki.openmoko.org/wiki/Neo_FreeRunner_GTA02_Hardware if it is. > > | > > | No idea, it's a driver issue. On detection of 47k device is switching to > > | fastcharge, which I think is actually working. Also it should activate > > | LOGICAL hostmode for USB-controller same time (NOT asserting > > EN_USBHOST!), > > | which is needed for Y-Cable and doesn't hurt charger. I don't have the > > | slightest idea whether this already is in kernel or not. > > > > It is deasserted if it sees you have a 1A charger in there, has been for > > a while. > > A related question: I presume that it is the electrical signal > EN_USBHOST which flips the switch which causes the USB port to source > current in host mode, as opposed to sinking current in device mode. > > This is of course what is expected of a USB host, but it also prevents > us from charging the Freerunner when the USB port is in host mode, if an > appropriate power source is available. > > Question: > Is it possible to charge the Neo Freerunner when using the USB port in > host mode, by ascerting LOGICAL hostmode and by NOT asserting EN_USBHOST? that's exactly how Y-cable_V1 *) works (besides replacing the needed 15k? pulldown-Rs also switched away by deasserting EN_USBHOST) The combination LOGICAL hostmode + NO chargepump is exactly what the kernel-driver should initiate when seeing 47k
*) There's the spec for V2 already, that's capable of working with USB2.0-OTG (supported by GTA03, though USB2.0 will be there with GTA04 at the earliest) See "Y-Cable revisited" somewhere on the lists - even more simple ;-) /j
signature.asc
Description: This is a digitally signed message part.
_______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community