Dear K.U.
I'm facing the exact same situation, I'm using BQ27410 but I think
except the fuel gauge driver, the driver integration for both battery
charger IC and fuel gauge is required for the full battery status
indication icon. Due to I'm new to Android platform, could you advise me
how do you do it to make whole thing work? Thanks in advance!
TF
K.U.於 2013年4月24日星期三UTC+8上午2時50分19秒寫道：
>
> Hi Matthias,
>
> Thank you very much for your reply and please pardon me for taking this
> long to respond. What you provided is the exact information I was looking
> for. And your reply was very helpful.
> It took me some time to try out what you said, as I had to wait for the
> next revision of the PCBs of our design.
>
> I'm gonna mention a few more details about using the BQ27200 fuelgauge
> chip as it may be helpful for someone who's seeking for the same
> information asI did.
>
> This chip has a set of registers which contains the battery information
> and the linux driver gets the battery information by reading these
> registers through I2C. The chip also has a set of EEPROM registers which
> contains the battery specific parameters (eg: battery capacity) which will
> be used by the fuelgauge chip for the learning cycle. Before running the
> first learning cycle, *the EEPROM has to be programmed by the developer. *TI
> provides a programming tool called "BQ27200 tester board" + PC software,
> using which the developer can program the fuelgauge parameters. *It is
> important to include a programming interface on your PCBs to mate with the
> tester board interface. (similar to a JTAG interface)*
>
> Best regards,
> K.U.
>
> On Saturday, August 4, 2012 12:30:25 AM UTC+5:30, Matthias Kaehlcke wrote:
>>
>> Hi K.U.
>>
>> El Thu, Aug 02, 2012 at 03:32:16AM -0700 K.U. ha dit:
>>
>> > I am working on an Android-ICS porting project onto a custom Android
>> Tab,
>> > which uses AM3730 (TI's ARM) processor. The device is based on the
>> > BeagleBoard architecture. The device has a fuel guage (BQ27200) and
>> a
>> > charger IC (BQ24150) which communicates with a
>> > MSP430 micro-controller firmware.
>> > My main problem is how to display the battery status through the
>> "battery
>> > icon" on the taskbar? Also I am aware that the other battery related
>> > operations/status (charging, discharging, battery low, fully
>> charged)
>> > could also be read by the Android system and act accordingly. I
>> could not
>> > find a clear set of instructions on how to integrate these features
>> with
>> > android.
>> > Can some one kindly direct me to a link/site where I can find a
>> guide for
>> > this task? Or if any of you can take the time to reply this post, it
>> will
>> > be greatly appreciated.
>>
>> Android gets the battery and charger status from the power supply
>> devices registered in the kernel. whenever the status of a
>> power supply changes (charging/discharging, battery level, charger
>> plugged/unplugged, ...), the kernel sends a so called uevent
>> (userspace event). user processes can register to these uevents, which
>> is what Androids BatteryService does. when the BatteryService is
>> notified about a change in a power supply it reads the updated status
>> of the power supply from sysfs and sends out the corresponding intents
>> which cause the update of the battery icon and so on
>>
>> for the BQ27200 fuel gauge you have the bq27x00_battery driver in the
>> kernel (drivers/power/bq27x00_battery.c), which provides the
>> battery status through uevents and sysfs as outlined above. if
>> configured correctly you should see on your running system a power
>> supply of type battery in /sys/class/power_supply/ with attributes
>> like the current battery capacity or the charging status
>>
>> best regards
>>
>> --
>> Matthias Kaehlcke
>> Embedded Linux Developer
>> Amsterdam
>>
>> Representation of the world, like the world itself, is
>> the work of men; they describe it from their own point
>> of view, which they confuse with the absolute truth
>> (Simone de Beauvoir)
>> .''`.
>> using free software / Debian GNU/Linux | http://debian.org : :' :
>> `. `'`
>> gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `-
>>
>
> On Saturday, August 4, 2012 12:30:25 AM UTC+5:30, Matthias Kaehlcke wrote:
>>
>> Hi K.U.
>>
>> El Thu, Aug 02, 2012 at 03:32:16AM -0700 K.U. ha dit:
>>
>> > I am working on an Android-ICS porting project onto a custom Android
>> Tab,
>> > which uses AM3730 (TI's ARM) processor. The device is based on the
>> > BeagleBoard architecture. The device has a fuel guage (BQ27200) and
>> a
>> > charger IC (BQ24150) which communicates with a
>> > MSP430 micro-controller firmware.
>> > My main problem is how to display the battery status through the
>> "battery
>> > icon" on the taskbar? Also I am aware that the other battery related
>> > operations/status (charging, discharging, battery low, fully
>> charged)
>> > could also be read by the Android system and act accordingly. I
>> could not
>> > find a clear set of instructions on how to integrate these features
>> with
>> > android.
>> > Can some one kindly direct me to a link/site where I can find a
>> guide for
>> > this task? Or if any of you can take the time to reply this post, it
>> will
>> > be greatly appreciated.
>>
>> Android gets the battery and charger status from the power supply
>> devices registered in the kernel. whenever the status of a
>> power supply changes (charging/discharging, battery level, charger
>> plugged/unplugged, ...), the kernel sends a so called uevent
>> (userspace event). user processes can register to these uevents, which
>> is what Androids BatteryService does. when the BatteryService is
>> notified about a change in a power supply it reads the updated status
>> of the power supply from sysfs and sends out the corresponding intents
>> which cause the update of the battery icon and so on
>>
>> for the BQ27200 fuel gauge you have the bq27x00_battery driver in the
>> kernel (drivers/power/bq27x00_battery.c), which provides the
>> battery status through uevents and sysfs as outlined above. if
>> configured correctly you should see on your running system a power
>> supply of type battery in /sys/class/power_supply/ with attributes
>> like the current battery capacity or the charging status
>>
>> best regards
>>
>> --
>> Matthias Kaehlcke
>> Embedded Linux Developer
>> Amsterdam
>>
>> Representation of the world, like the world itself, is
>> the work of men; they describe it from their own point
>> of view, which they confuse with the absolute truth
>> (Simone de Beauvoir)
>> .''`.
>> using free software / Debian GNU/Linux | http://debian.org : :' :
>> `. `'`
>> gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `-
>>
>
> On Saturday, August 4, 2012 12:30:25 AM UTC+5:30, Matthias Kaehlcke wrote:
>>
>> Hi K.U.
>>
>> El Thu, Aug 02, 2012 at 03:32:16AM -0700 K.U. ha dit:
>>
>> > I am working on an Android-ICS porting project onto a custom Android
>> Tab,
>> > which uses AM3730 (TI's ARM) processor. The device is based on the
>> > BeagleBoard architecture. The device has a fuel guage (BQ27200) and
>> a
>> > charger IC (BQ24150) which communicates with a
>> > MSP430 micro-controller firmware.
>> > My main problem is how to display the battery status through the
>> "battery
>> > icon" on the taskbar? Also I am aware that the other battery related
>> > operations/status (charging, discharging, battery low, fully
>> charged)
>> > could also be read by the Android system and act accordingly. I
>> could not
>> > find a clear set of instructions on how to integrate these features
>> with
>> > android.
>> > Can some one kindly direct me to a link/site where I can find a
>> guide for
>> > this task? Or if any of you can take the time to reply this post, it
>> will
>> > be greatly appreciated.
>>
>> Android gets the battery and charger status from the power supply
>> devices registered in the kernel. whenever the status of a
>> power supply changes (charging/discharging, battery level, charger
>> plugged/unplugged, ...), the kernel sends a so called uevent
>> (userspace event). user processes can register to these uevents, which
>> is what Androids BatteryService does. when the BatteryService is
>> notified about a change in a power supply it reads the updated status
>> of the power supply from sysfs and sends out the corresponding intents
>> which cause the update of the battery icon and so on
>>
>> for the BQ27200 fuel gauge you have the bq27x00_battery driver in the
>> kernel (drivers/power/bq27x00_battery.c), which provides the
>> battery status through uevents and sysfs as outlined above. if
>> configured correctly you should see on your running system a power
>> supply of type battery in /sys/class/power_supply/ with attributes
>> like the current battery capacity or the charging status
>>
>> best regards
>>
>> --
>> Matthias Kaehlcke
>> Embedded Linux Developer
>> Amsterdam
>>
>> Representation of the world, like the world itself, is
>> the work of men; they describe it from their own point
>> of view, which they confuse with the absolute truth
>> (Simone de Beauvoir)
>> .''`.
>> using free software / Debian GNU/Linux | http://debian.org : :' :
>> `. `'`
>> gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `-
>>
>
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