[Arm-netbook] IC for analog and digital buttons (EOMA-68)
gacuest at gmail.com
Thu Aug 7 10:07:55 BST 2014
2014-08-07 10:13 GMT+02:00 Luke Kenneth Casson Leighton <lkcl at lkcl.net>:
> blegh - and you need 2 of them _and_ 2 analog ICs as well. that's
> starting to make the STM32F103 (64-pin variant) look attractive. and
> i know you can get that at around the $2.50 mark in 10k volumes.
> *sigh* ok do you really need that USB Flash thing? because of a) the
> cost (at least $4.50) b) the number of ICs (4) it's starting to tip in
> favour of the STM32F again, i get the feeling you'd be better off
> wiring up the STM32F as a USB 1.1 device. you'll also need to wire up
> the UART to the EOMA68 interface and a couple of other pins to put it
> into "firmware upload" mode, but that's ok.
> the advantage there is that i have some GPL'd KiCAD designs with
> STM32F already in them (or have found some out there when i last
Yes, the USB flash drive can be removed.
I think Daniel also prefers a microcontroller.
2014-08-06 14:18 GMT+02:00 Luke Kenneth Casson Leighton <lkcl at lkcl.net>:
> * one GPIO IC IN pin is needed for MicroSD "detect"
> * digital GPIO IC OUT pin needed for power-up of LCD
> * accelerometer IRQ goes to digital GPIO IC IN
> * digital GPIO IC IN pin connects to IRQ-OUT of AXP209
> * digital GPIO IC IN pin connects to Headphone-detect (in case you
> want to alter volume on headphone-out)
So, do we connect all this to STM32F? Or do we have to add the STM32F
and the digital GPIO IC?
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