On Monday 14 July 2008, Stroller wrote:

quoted text
> Hi there,

>

> It looks like my problem with SIM registration [1] may be easily

> solvable simply by trying a different SIM or reseating the current one.

>

> But because I'm fetishistic about following battery charging

> instructions I don't want to try this (which requires removing the

> battery) until the unit is fully charged.

>

> The wiki [2] says:

>

>    The battery can be charged using the provided charger (at 1000mA)

>    or from a powered USB port capable of providing 500mA worth of

>    current. Most computers will be able to charge the FreeRunner without

>    any problems.

>

>    Charging at 100mA takes 6-12 hours and at 500mA takes 1-2 hour

>

>

> I understood the provided charger was a dumb one and that - because

> the Freerunner is unable to communicate with it - an unpowered USB

> connection would be assumed, the Freerunner would act conservatively,

> only drawing 100mA.

>

> Which is correct, please?

The charger is dumb, but has a 47k resistor from the ID pin of the USB

connector to ground. This allows the Freerunner to identify it as capable to

provide 1000mA. See the USB Host section of:

http://wiki.openmoko.org/wiki/Neo_FreeRunner_GTA02_Hardware 
> I decided to try forcing the Freerunner to fast-charge, and a little

quoted text
> Googling found me the CheckFastCharge-script on the Wiki [3].

>

> Reading checkFastCharge.py I find that it checks '/sys/devices/

> platform/s3c2410-i2c/i2c-adapter/i2c-0/0-0008/chgmode' and that fast

> charging is indicated by "fast_cccv" there.

>

> Presumably this script was written for the Neo1973, however, or a

> different kernel, as on my Freerunner the location is '/sys/devices/

> platform/s3c2440-i2c/i2c-adapter/i2c-0/0-0073/chgmode' and it

> currently says "fast", not "fast_cccv" (or, for that matter, slow or

> anything like that).

>

> So is "fast" the correct syntax for the Freerunner's chgmode?

> Has it somehow detected that the charger is capable of 500+ mA?

> Or should I echo "fast_cccv" to that location?

> What are the correct '/sys/devices/platform/s3c2440-i2c/i2c-adapter/

> i2c-0/0-0073/chgmode' values for "slow" and no-charge for the

> Freerunner, please? (using the default factory image)

> Or is chgmode simply broken on the Freerunner's default factory image?

>

> TIA for any suggestions,

>

> Stroller.

>

>

>

>

>

> [1] http://lists.openmoko.org/pipermail/community/2008-July/021677.html

> [2] http://wiki.openmoko.org/wiki/

> Getting_Started_with_your_Neo_FreeRunner#Charging_the_Neo_Freerunner

> [3] http://wiki.openmoko.org/wiki/CheckFastCharge-script

>

>

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