Isn't Wifi supposed to be off by default?
werner at openmoko.org
Fri Jan 16 01:40:14 CET 2009
> Let's hope so :-) Anything else would be hard to track down ...
Hmm, things stay somewhat mysterious. I cleaned up the module (the
connector on the WLAN module seems rather sensitive even to
microscopic spots of tin on its legs) and put it back. Now current
consumption looks much better. (All this is with Vbat = 4.0V.)
# hard reset
# cut USB power
233.57mA 234.28mA 234.72mA 0.395mA
# screen blanker
158.62mA 159.08mA 159.79mA 0.337mA
# LDO1: accel
159.92mA 160.27mA 160.86mA 0.321mA
# LDO2: codec
160.99mA 161.52mA 162.22mA 0.355mA
# LDO4: BT
153.15mA 153.48mA 154.29mA 0.330mA
# LDO5: RF (GPS)
109.09mA 109.17mA 109.21mA 0.034mA
# LDO6: LCM
96.25mA 96.79mA 97.07mA 0.226mA
96.48mA 96.78mA 97.55mA 0.308mA
# WLAN reset
96.82mA 97.12mA 97.58mA 0.231mA
# force SDIO clock low
gpio e5 e5=0
96.64mA 97.06mA 97.85mA 0.318mA
# GSM reset
96.86mA 97.07mA 97.52mA 0.174mA
34.38mA 34.43mA 34.48mA 0.030mA
The figures are almost identical to what I got with the module removed.
So something happened, but I'm not sure what :-( Could be that there
was a bad contact that messed up things without affecting functionality.
Or there is some state, either in the WLAN module or somewhere else in
the system, that doesn't get cleared by hard reset and reboot, and that
state makes WLAN waste power.
I hate those bugs that just teleport away when you're moving in for the
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