On Thu, 2009-10-22 at 01:21 +1100, Glenn L. McGrath wrote: > On Tue, 20 Oct 2009 10:39:54 +0530 > max <csy0...@googlemail.com> wrote: > > > I am attempting to switch on my Freerunner after quite a few months. > > However, it just doesn't turn on. > > > tried booting with USB power. Nothing worked. Any suggestions other than > > getting a new battery? :-) > > I dont think its mentioned in the wiki, but when booting via USB power > you need to use the USB cable supplied with the openmoko. > > If you have another USB cable it wont supply enough power to allow it > to boot, USB cables have some sort of id built in which is required to > allow a higher current than the USB spec specifies to be supplied. > > With the USB cable supplied it should be able to boot without the > battery. > > > > Glenn
I think you have it rather mixed up. These are standard usb cables - any one with the right connector is ok. The wall charger, which uses a usb connector on one end (its NOT a proper usb cable as its for power only), has a resister connected between two pins to tell the FR that its capable of supplying 1A. The usb data cables supplied are standard. Early hardware (GTA02A5?) - cannot supply enough current to boot from USB. The mods were both software (u-boot and then Qi) to stagger the startup inrush of current as various parts were powered up (hence make sure you upgrade u-boot or Qi) and add extra capacitance so the voltage doesnt dip as far power is applied. I cant point you to a reference for this, but I am sure one of those involved will jump in (or on me :) if I have got it wrong. BillK _______________________________________________ support mailing list support@lists.openmoko.org https://lists.openmoko.org/mailman/listinfo/support