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SubjectRe: edt-ft5x06 question
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Hi Simon,

sorry but as for Luca I've lost mail with mail filter.
See below my ideas on how to improve it.

Thanks
Cheers

Il 15/11/2017 17:30, Giulio Benetti ha scritto:
> Hi Luca,
>
> I had problems with e-mail filter, so I rebuilt yours by hand.
> Forgive me.
>
> See below.
>
> Thanks
> Kind regards
>
> > Hi Giulio,
> >
> > On 14/11/2017 22:42, Giulio Benetti wrote:
> > > Hello everybody,
> > >
> > > I'm using ft5206 with edt-ft5x06.c driver,
> > > but what I see is that registers with M09 or M06
> > > seem different from focaltech ft5206
> > > https://www.buydisplay.com/download/ic/FT5206.pdf
> > >
> > > For example, except address 0x80 for threshold register(thgroup),
> > > all the others don't appear:
> > > GAIN 0x30 or 0x92 should be 0x82(thcal maybe?)
> > >
> > > Can someone clarify this?
> >
> > Are you having any problems, or just investigating?
>
> I need to add some other IC register to calibrate sensibility with
> different glasses, but starting from ft5x06 or other Focaltech standard
> IC FW.
>
> >
> > > Maybe M06 or M09 are a custom firmware for focaltech ft5x,
> > > then it has different registers?
> >
> > All the FT5x06 are 8051-based chips designed to implement touchscreen
> > controllers. The FT5x26 are similar but with a more powerful core
> > (Cortex-M IIRC).
> >
> > As far as I could understand and guess, their register interface is
> > fully implemented in firmware, so it could change completely from one
> > panel to another. However all panels that I have seen seem to use
> > firmwares with either the "M06" or the "M09" protocol, which are
> > implemented in the Linux driver.
>
> In my case driver recognizes M09, but only address 0x80
> register(thgroup) is correct.
> The others:
> GAIN: 0x92
> GAIN: 0x93
> GAIN: 0x94
> GAIN: 0x95
>
> are not described in that datasheet.
> The point is that datasheet seems to be official by Focaltech,
> like if they deliver that IC with a standard FW inside.
> I can't find a way to safely probe if it's a standard FW or from EDT M09
> or M06.
> I wouldn't write a different driver ft5x.c because it's a repeatition,
> but EDT seems a special version(FW) of ft5x.
>
> Maybe on dt-bindings I could force to be EDT or standard.
> On legacy sunxi-3.4 the driver handled this as datasheet I mentioned.
> What do you think?
>
> >
> > The driver also performs some checks to understand which of the two
> > protocols is implemented by the controller. These checks are quite
> > horrible, but they worked for me.
>
> I have FW with registers as described at
> https://www.buydisplay.com/download/ic/FT5206.pdf
> and I would like to add them as attributes more and dt-bindings to
> improve trimming.
> I would call those registers the same as manual:
> THGROUP
> THCAL
> etc.
>
> And I would also like to add a tasklet that recalibrate every
> minute(specified by attr or dt-binding).
> I want to do this(already done succesfully on 3.4) because I've
> experienced problems on temperature and mechanical drifts.
>
> >
> > The best thing is that you ask a datasheet to your supplier, in order to
> > make sure about the protocol and avoid guessing.
> >
> > Regards,
> > --
> > Luca
>
>


--
Giulio Benetti
R&D Manager &
Advanced Research

MICRONOVA SRL
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