[fprint] USB ID 04f3:0903 "Elan Microelectronics Corp."

[Igor Filatov]

> 1. windows boot (000c*1, 0009*2, then 403f)

Those 009's could be the calibration. Could you send me your traces?
Also pls do one where you wait a few seconds after the led goes on
before putting the finger on the sensor.

> 2. record a fingerprint
> Windows driver do multiple cmd 9, then, 403f, then again with this
> pattern (I have done one try, i think it can change, with record
> quality) :

I noticed that when enrolling on win the device would keep scanning
the finger (4031, 403f, 0009, read, 4031... or just 0009, read, 0009,
read...) until you lift the finger, even after the enroll stage has
passed. The quality of raw images doesn't change so maybe the driver
does some stuff to improve them internally (or maybe it just
simplified their code...)



---------- Forwarded message ---------
From: Sebastien Bechet <sebastien.bechet at osinix.com>
Date: Wed, Nov 8, 2017 at 6:15 PM
Subject: Re: [fprint] USB ID 04f3:0903 "Elan Microelectronics Corp."
To: <fprint at lists.freedesktop.org>


> Are you observing USB traffic of the original driver? I think there
> should also be a calibration of a couple of 4023 followed by 0009 to
> read data and 4024 to save (names mine). Without it wait for finger
> (403f) doesn't work correctly.

Yes of the original driver as explain here:
https://lists.freedesktop.org/archives/fprint/2017-March/000875.html
(I think it was 20160516-Elan driver)

I have done four traces:

1. windows boot (000c*1, 0009*2, then 403f)

2. record a fingerprint
Windows driver do multiple cmd 9, then, 403f, then again with this
pattern (I have done one try, i think it can change, with record
quality) :

cmd9*1 then 403f
cmd9*7 then ..
cmd9*7 then ..
....*9 then ..
.....8........
7 7 7 7 7 7 7 1 1 5 7 6 6 6 1 4 7


3. test a fingerprint

cmd9*17 then 403f then 000b

4. windows shutdown

noop


I never see 4023 or 4024 cmd.


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