[Arm-netbook] Handheld Games Console

[GaCuest]

En 21 de septiembre de 2015 en 23:34:15, GaCuest (gacuest at gmail.com) escrito:
> En 21 de septiembre de 2015 en 21:50:23, Luke Kenneth Casson Leighton (lkcl at lkcl.net)  
> escrito:
> > On Mon, Sep 21, 2015 at 6:03 PM, GaCuest wrote:
> > > En 21 de septiembre de 2015 en 18:17:15, Luke Kenneth Casson Leighton (lkcl at lkcl.net)  
> > escrito:
> > >> On Mon, Sep 21, 2015 at 4:56 PM, GaCuest wrote:
> > >> > I have updated it: http://rhombus-tech.net/community_ideas/games_console/news/  
> > >> >
> > >> > I hope that I have done it well. Thanks!
> > >>
> > >> yeah that looks fantastic.
> > >>
> > >> hmmmm, i have an idea for you. how about moving the EC onto the
> > >> buttons PCB? that way you only need an absolute minimum of
> > >> connections to it. USB, power, GND... maybe BOOT and RESET errr...
> > >> that's all you'd really need.
> > >>
> > >> that would be 6 wires, and i'm sure you could find some suitable
> > >> spring-loaded connector for that. maybe even a SIM card holder (one
> > >> without the "holder" bit - just the bare spring-loaded bits. as you'd
> > >> be talking USB 1.0 or USB 1.1 that would hardly tickle any EMF.
> > >>
> > >
> > > If we put the STM32F in the second (or third) PCB, we need to connect the second with the  
> > third PCB (the same problem).
> >
> > ? why? rright right yes, got it. ok, so yes, put STM32F on 2nd (or
> > 3rd) PCB, link 2nd to 3rd with FFC-20P, then you only have one
> > FFC-20P, not two, the other is replaced with a simple 4 pin (or
> > possibly 6 pin) cable / blah blah whatever.
> >
> > > Other problem is that we lost the USB ST-Link connection for FFC developers conector.  
> > >
> > > What do you think?
> >
> > ideas occur to me...
> >
> > (1) if someone wants to develop an alternative embedded controller
> > PCB, if there's already one on the main PCB they are discouraged from
> > adding another. it occupies the USB port... you can't really take
> > that over unless you want to replace PCB1.
> >
> > (2) if someone wants to develop an alternative joypad controller
> > PCB... say... out of discrete ICs, they are again discouraged from
> > doing so because there's an STM32F on the main PCB, esp. as it
> > occupies an entire USB port.
> >
> > (3) if the STM32F is on the joypad controller PCB, and it's pretty
> > much "USB", you could actually consider making a *separate* joypad
> > *product* out of it, sold for other markets.... *including* offering
> > one for sale as a 2nd controller to be wired directly into the USB
> > port of the games console.
> >
> > (4) i don't see any problem with doing product development (of the
> > joypad controller) by taking PCB2 and PCB3, testing them *entirely
> > separately* as a stand-alone unit.
> >
> > (5) i don't see any problem with doing product development (of the
> > games console) by taking out PCB2 and PCB3, and connecting
> > "alternative products" directly into the USB port provided for
> > (normally) joypad control.
>  
> Yes, surely you are right and it is better that way.
>  
> But we have a problem with EINTs.
>  
> We have at least 5 IC they need EINT:
> * Touch panel
> * AXP209
> * Headphone detect
> * Accelerometer
> * MicroSD
>  
> However EOMA-68 only has 4 EINTs.
>  
> The only solution I can think is to put the BMA250 in the second PCB and connect directly  
> to STM32F and configure it as a USB device. I do not know if this is easy to do for us (software  
> development) and solve the problem of EINTs.
>  
> Thanks.

Also I found the following FFC cable: http://aliexpress.com/store/product/Free-Shipping-FPC-FFC-connector-cable-socket-6-pin-0-5mm-connector-for-LCD-screen-interface/428886_1251083253.html

Do you recommend use that connector or other (cheaper) connector?

Thanks.

>  
> >
> > l.
> >
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