[Bug 95] verify charger current and battery temperature reading correctness
bugzilla-daemon at bugzilla.openmoko.org
bugzilla-daemon at bugzilla.openmoko.org
Sat Mar 31 22:20:40 CEST 2007
http://bugzilla.openmoko.org/cgi-bin/bugzilla/show_bug.cgi?id=95
laforge at openmoko.org changed:
What |Removed |Added
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CC| |werner at openmoko.org
------- Additional Comments From laforge at openmoko.org 2007-03-31 22:20 -------
the level fluctuation can actually be quite normal, given the amount of
non-constant-current consumers. There are a number of DC/DC converters clocked
at high rate, lots of digital consumers that have very dynamic power
requirements, etc.
The ADC value for charger current reading is an instantaneous single sample
reading. I guess it would need some kind of low-pass filtering to get rid of
the transients.
As for the actual value: I have verified the calculations a number of times.
Somebody with a usb current probe (Werner?) should probablt do measurements to
determine if those readings are correct (and we draw too muhc power), or
incorrect (we have some hardware or software problem)
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