--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
On Tue, Aug 30, 2016 at 10:09 AM, Raphaël Mélotte raphael.melotte@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@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@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.