[Arm-netbook] EOMA68 laptop housing battery control

[Adam Van Ymeren]

On Thu, Nov 24, 2016 at 9:36 AM, Luke Kenneth Casson Leighton
<lkcl at lkcl.net> wrote:
> ---
> crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
>
>
> On Thu, Nov 24, 2016 at 2:15 PM, Adam Van Ymeren <adam.vany at gmail.com> wrote:
>> On Thu, Nov 24, 2016 at 9:12 AM, Adam Van Ymeren <adam.vany at gmail.com> wrote:
>>> On Thu, Nov 24, 2016 at 9:05 AM, Jonathan Frederickson
>>> <silverskullpsu at gmail.com> wrote:
>>>> I'm curious, since unlike most laptops the computer is in a separate
>>>> unit... is the charge level of the battery reported to the OS as it
>>>> would be for a traditional laptop or phone? Would be interested to
>>>> know if this is supported in general, only with certain CPU cards, or
>>>> not at all.
>>>
>>> I would imagine the battery controller lives on the I2C bus which is
>>> part of the EOMA68 pinout.
>>
>> Also as I understand it, this bus is a mandatory part of the standard,
>> so any CPU card must contain an I2C bus and therefore will be able to
>> talk to the battery controller (if that is indeed where the battery
>> controller lives).
>>
>> I guess I should stop speculating, but this seems like a reasonable
>> way to control the battery in an EOMA68 world.
>
>  it's actually going to be connected to the STM32F072, which also
> controls the power and has a RTC, and also controls the 320x240 LCD
> display so that battery status can be displayed on that whilst the
> Card is completely powered off.

Oh interesting, sorry for speculating incorrectly.  That small LCD
screen is a really cool feature, and a clever idea for the touchpad.

>
> so, someone will need to write either userspace or kernelspace drivers
> to provide the information to whatever OS is running, as i am
> focussing on hardware design.  that will need to be over the USB
> interface to the STM32F072.
>
> l.
>
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