[Arm-netbook] Keyboard

[Luke Kenneth Casson Leighton]

---
crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68


On Tue, Aug 30, 2016 at 10:09 AM, Raphaël Mélotte
<raphael.melotte at gmail.com> wrote:
> Ok, I understand it a bit better now. Thank you :-)
>
> I'm starting to realize I have been using laptops for years and I know
> nothing about how they works.

 this isn't an ordinary laptop.  good beginning into standard laptops
is to look at libreboot or coreboot.  interface with hardware tells
you what's inside.


>
>
> 2016-08-29 21:52 GMT+02:00 Luke Kenneth Casson Leighton <lkcl at lkcl.net>:
>>
>> ---
>> crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
>>
>>
>> On Mon, Aug 29, 2016 at 8:15 PM, Raphaël Mélotte
>> <raphael.melotte at gmail.com> wrote:
>> > Of course ! I forgot the touchpad actually had an lcd. It will be so
>> > great
>> > to be able to have some of those displayed right below the keyboard !
>> > :-)
>> > I just saw the power button that's connected to the STM32F072 when
>> > looking
>> > for something else.
>> > If I got it right, PCB1 receives the CPU card and powers PCB2
>>
>>  nope.  PCB3 powers PCB2, which (through the STM32F) controls the
>> Battery / Power IC on PCB3, through which power to PCB1 is controlled.
>>
>>  yes it literally has to be that complex because EOMA68 power is
>> "OTG-like" i.e. may be *TWO-WAY*.  so the STM32F072 is responsible for
>> monitoring (through I2C in communication with the Battery / Power IC)
>> what is going on, also receives notification about power provision
>> from the EOMA68 Computer Card, and makes decisions whether to put the
>> Power IC into "OTG Host" or "OTG Client" power modes.
>>
>>  look up the datasheet on the bq24193 for details.
>>
>> > which contains
>> > the STM32F072. Does that mean that a CPU card have to be plugged in in
>> > order
>> > for the STM32F072 to be powered ?
>>
>>  incorrect.  the STM32F072 is powered continuously  it can never be
>> powered off (short of opening up the laptop case and physically
>> disconnecting the battery).
>>
>>  l.
>
>