Userspace app for fast charge (was Re: Price of the Freerunner spare parts)

Bobby Martin bobbymartin2 at
Thu Mar 27 23:52:11 CET 2008

I just want to make it clear: my python userspace app
( *won't*
automatically send you into fast charge mode.  It automatically *asks*
you if you want to go into fast charge mode whenever a slow charger is
recognized.  It also goes through a (annoying, but I think necessary)
confirmation sequence before it goes into fast charge mode.

It also knows nothing about GTA02.  It just sends a fastcccv to the
charger.  I assume on the 02 that still just makes it pull 500 mA, not

(Kevin, I know that you know all this, but at one point in the thread
it looked as if someone was saying my app would automatically force
fast charge.)


> From: "steve" <steve at>
> To: "'Kevin Dean'" <kevin at>, "'List for Openmoko community discussion'" <community at>
> Date: Thu, 27 Mar 2008 14:02:46 -0700
> Subject: RE: Price of the Freerunner spare parts
> Thanks Kevin,
>   I recall asking engineering what would happen if somebody disabled this
>  check ( hey its open source) and the general impression was that if the
>  charger was not capable of fast charging then you would not have nice
>  outcomes. I think the worse case might be if you tried to draw more than
>  500ma from a PC USB. Somebody not in marketing should answer that question.
>  Steve
>  -----Original Message-----
>  From: kev.forever at [mailto:kev.forever at] On Behalf Of
>  Kevin Dean
>  Sent: Thursday, March 27, 2008 12:22 PM
>  To: List for Openmoko community discussion
>  Cc: steve
>  Subject: Re: Price of the Freerunner spare parts
>  On Thu, Mar 27, 2008 at 2:58 PM, joerg <joerg.twinklephone at> wrote:
>  >  Correct, it checks for 48k-OHM resistor on ID-pin of mini-USB, then
>  enables 1A
>  >  instead of 100/500mA USB-standard.
>  >  You also may enable 1A-mode (and 500mA mode) via some small GUI-app IIRC.
>  >
>  This is possible via userspace with Bobby's application.
>  (
>  However, the flaw to this is that it will force fast charge even if
>  the charger isn't capable and hints that this could be... bad. :)
>  For the record, it APPEARS that with the Python application, the iGo
>  works just fine as a charger.
>  -Kevin

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