--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
On Wed, Feb 22, 2017 at 6:35 PM, Internet <[email protected]> wrote: > The power issue is pretty tough I think. Do you want to allow charging > from both sides (12v dc jack and eoma-5v0) > yes. > or does the power from the card only act as additional power for the > system (without charging and just taking the load off the battery)? > no. an OTG cable into the EOMA68 Card should be capable of charging (not necessarily *running* the system as it's far too much current required). > How do you want to control the power switch (SY6280) and detect whether > the card is passive or active (taking power/providing power)? > usual OTG software detection, then communicated (quickly) to avoid any current bun-fights. OTG generates IRQs from the cable being plugged in (usual way) - the extra bit will be to ensure that the required GPIOs are pulled high/low - there's quite a few. l.
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