Hi, On POWER_SUPPLY_CHANGED uevent, battery capacity is updated. Lets say I plugged in AC charger @ time 't'. Now an uvevnt occurs and battery capacity is updated in android.
In time t+20, battery has charged and the capacity must have increased to some higher level. I can notice this by reading sysfs. But the same in not updated in android. Not @ time t+30, I unplug the AC charger, again an uvevnt is observed and capacity is updated in android. Hope I am clear. Thanks and Regards, Arun R Murthy --------------------- On Tue, Apr 13, 2010 at 1:14 PM, ZhangJieJing <kzj...@gmail.com> wrote: > Hi, > > what I know is battery capacity update is triggered by > POWER_SUPPLY_UEVENT, > 1, please ensure this UEVENT is sent, > you can change init.rc 's loglevel to 9 to get the uevent dump. > 2, what this command output: > # ls /sys/class/power_supply > > I think the plug/unplug make the battery capacity update is because it will > send a POWER_SUPPLY_CHANGED uevnet, and on discharging, you don't let your > driver send the uevent in a time(eg. 60s). > > if it's true, you should add a timer or delayed_work in your battery driver > to do this job. > > --- > Best regards, > Zhang Jiejing > > > 2010/4/13 Arun Raghavendra Murthy <rmurthy.a...@gmail.com> > > Hi, >> The battery capacity is getting updated while plug/unplug of charger. >> But not getting updated while discharging. >> >> The BatteryService class is very much able to read the battery capacity, >> ac - online, usb - online, etc. >> >> The problem that I am facing is the battery capacity is getting updated >> only on plug/unplug of charger. >> In the mean time its not updated. But if I read the capacity through the >> sysfs I see the updated capacity. >> >> What I guess is in android only there should be some application that >> should read the battery capacity >> from sysfs at time intervals "t" and update the same. >> >> Please let me know on this. >> >> Thanks and Regards, >> Arun R Murthy >> -------------------- >> >> Thanks and Regards, >> Arun R Murthy >> -------------------- >> >> On Tue, Apr 13, 2010 at 7:53 AM, ZhangJieJing <kzj...@gmail.com> wrote: >> >>> CC the list. >>> >>> Hi, >>> >>> the BatteryService is working like this: >>> >>> cd /sys/class/power_supply >>> >>> for each dir: >>> if have a file named type: >>> if type == Battery >>> read capicty ...etc >>> if type == AC >>> read online >>> if type == USB >>> read online >>> >>> If you mean it not updated on unplug & plug charger, you should first >>> check the type of your power_supply driver. >>> >>> --- >>> Best regards, >>> Zhang Jiejing >>> >>> >>> 2010/4/12 Arun Raghavendra Murthy <rmurthy.a...@gmail.com> >>> >>>> Hi, >>>> In that case it is working for me. >>>> On the event of power supply changed the battery capacity is getting >>>> updated. >>>> On plugging the AC charger capacity gets updated and on removal of AC >>>> charger capacity gets updated. But in the mean time i.t between charging >>>> plug and unplug it is not getting updated though i see a change in the >>>> sysfs. >>>> >>>> Thanks and Regards, >>>> Arun R Murthy >>>> --------------------- >>>> >>>> On Mon, Apr 12, 2010 at 7:55 AM, ZhangJieJing <kzj...@gmail.com>wrote: >>>> >>>>> Hi, >>>>> >>>>> you don't need send separatedly battery capacity, android framework >>>>> only monitor POWER_SUPPLY_CHANGED uevent, if it received the uevent, it >>>>> will >>>>> read the sys fs under /sys/class/power_supply/* files to get the voltage, >>>>> current, capacity, etc, >>>>> you may need see >>>>> file frameworks/base/services/jni/com_android_server_BatteryService.cpp to >>>>> see the detail. >>>>> >>>>> --- >>>>> Best regards, >>>>> Zhang Jiejing >>>>> >>>>> >>>>> 2010/4/12 Arun Raghavendra Murthy <rmurthy.a...@gmail.com> >>>>> >>>>> Hi, >>>>>> The power_supply_changed() will handle if there is any change in >>>>>> power supply i.e plug/unplug of AC/USB. >>>>>> I have a work which keeps monitoring my battery parameters i.e battery >>>>>> voltage, current, capacity. >>>>>> >>>>>> Also I notice that all POWER_SUPPLY_PROP_* are registered as uevents >>>>>> in the power supply core driver. >>>>>> So is it necessary for me to send an uevent separately for battery >>>>>> capacity.? >>>>>> >>>>>> >>>>>> Thanks and Regards, >>>>>> Arun R Murthy >>>>>> -------------------- >>>>>> >>>>>> On Thu, Apr 8, 2010 at 8:36 PM, ZhangJieJing <kzj...@gmail.com>wrote: >>>>>> >>>>>>> Hi, >>>>>>> >>>>>>> you need check your battery driver, the update of battery capacity is >>>>>>> drive by uevent send by driver(via power_supply_changed() func), your >>>>>>> driver >>>>>>> may need have a delayed work or timer function to send this event every >>>>>>> timeout, such as 1 minute. >>>>>>> >>>>>>> you can reference file: drivers/power/tosa_battery.c about this. >>>>>>> --- >>>>>>> Best regards, >>>>>>> Zhang Jiejing >>>>>>> >>>>>>> >>>>>>> 2010/4/5 Arun R Murthy <rmurthy.a...@gmail.com> >>>>>>> >>>>>>>> Hi All, >>>>>>>> I am using andoird eclair and not able to see the battery capacity >>>>>>>> getting updated while charging/discharging. >>>>>>>> Wherein when I try to cat the battery capacity from the sysfs I am >>>>>>>> able to see the change. >>>>>>>> The only event that updates the battery capacity, voltage, etc in >>>>>>>> the >>>>>>>> application is the plug/unplug of the >>>>>>>> AC/USB charger. >>>>>>>> Please let me know on this. >>>>>>>> >>>>>>>> Thanks and Regards, >>>>>>>> Arun R Murthy >>>>>>>> ------------------- >>>>>>>> >>>>>>>> -- >>>>>>>> unsubscribe: >>>>>>>> android-porting+unsubscr...@googlegroups.com<android-porting%2bunsubscr...@googlegroups.com> >>>>>>>> website: http://groups.google.com/group/android-porting >>>>>>>> >>>>>>>> To unsubscribe, reply using "remove me" as the subject. >>>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> Arun R Murthy >>>>>> >>>>>> >>>>>> >>>>> >>>> >>>> >>>> -- >>>> Arun R Murthy >>>> >>>> >>>> >> >> > -- unsubscribe: android-porting+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-porting
