PAC7302 short datasheet from PixArt

PAC7302 short datasheet from PixArt

[Németh Márton]

Hi,

if anyone interested there is a brief overview datasheet about
PixArt PAC7301/PAC7302 at
http://www.pixart.com.tw/upload/PAC7301_7302%20%20Spec%20V1_20091228174030.pdf

Regards,

	Márton Németh

Re: PAC7302 short datasheet from PixArt

[Theodore Kilgore]

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On Sat, 30 Jan 2010, Németh Márton wrote:

> Hi,
>
> if anyone interested there is a brief overview datasheet about
> PixArt PAC7301/PAC7302 at
> http://www.pixart.com.tw/upload/PAC7301_7302%20%20Spec%20V1_20091228174030.pdf

Márton,

First, I am glad that mouse-copying reproduces the accent in your name. If 
you can help explain how to reproduce such things by typing while using 
apine over an ssh connection, using a standard US keyboard, I would be 
glad of the explanation. My wife is Hungarian, and I am thus very 
sensitized to the importance of the question, how to do the accents 
required for writing Hungarian properly.

Now, as to the substance of the mail above, thanks a lot. I had a bunch of 
the PixArt datasheets already, but I had missed that one. I would have a 
question, though:

This datasheet gives a lot of information about pinouts on the sensor chip 
and such good stuff which might be useful if one were constructing a 
circuit board on which to put the chip. What it does not give, very 
unfortunately, is any information about the command set which needs to be 
sent across the USB connection, which in turn actuates the circuits which 
in turn sends something to the sensor across one of those pins. For 
example, to set green gain one has to do something on connector X. But how 
does one send a command from the computer which does something on 
connector X? Some other datasheets from some other companies (Omnivision, 
for example) do seem occasionally to provide such information.

Thus, a question for you or for anyone else who reads it:

Has anyone figured out any shortcuts for matching up the missing pieces of 
information? Probably the answer is "no" but I think this is the kind of 
question which is worth asking again on some periodic basis.

Theodore Kilgore

Re: PAC7302 short datasheet from PixArt

[Jean-Francois Moine]

On Sat, 30 Jan 2010 14:56:56 -0600 (CST)
Theodore Kilgore <kilgota@banach.math.auburn.edu> wrote:

> First, I am glad that mouse-copying reproduces the accent in your
> name. If you can help explain how to reproduce such things by typing
> while using apine over an ssh connection, using a standard US
> keyboard, I would be glad of the explanation. My wife is Hungarian,
> and I am thus very sensitized to the importance of the question, how
> to do the accents required for writing Hungarian properly.

Hello Theodore,

I am also using a US keyboard and I have no problem with accents and
utf-8.

You must define the character encoding to 'UTF-8' and the font codeset
to 'Lat2' (central Europe). The locale must be set to 'en_US.UTF-8'.
Eventually, you may use the compose mechanism setting the compose
character to a specific key.

In Debian, this in done at installation time, but it may be changed by
dpkg-reconfigure or by hand.

The character encoding and the font codeset are in the
file /etc/default/console-setup. The locale is defined in the
file /etc/default/locale.

For the keyboard, in X, I set the 'compose' keyboard option to 'rwin',
i.e. the right 'ms-windows' key. This is defined in the
file /etc/default/keyboard or /etc/default/console-setup:
	XKBOPTIONS="compose:rwin"
To insert a composed character, press/release left-rwin, then the accent
and then the character. The compose sequences may be found in the file
/etc/console-setup/compose.ISO-8859-2.inc.

Cheers.

-- 
Ken ar c'hentañ	|	      ** Breizh ha Linux atav! **
Jef		|		http://moinejf.free.fr/

Re: PAC7302 short datasheet from PixArt

[Németh Márton]

Hi,
Theodore Kilgore wrote:
> 
> On Sat, 30 Jan 2010, Németh Márton wrote:
> 
>> Hi,
>>
>> if anyone interested there is a brief overview datasheet about
>> PixArt PAC7301/PAC7302 at
>> http://www.pixart.com.tw/upload/PAC7301_7302%20%20Spec%20V1_20091228174030.pdf
> 
> First, I am glad that mouse-copying reproduces the accent in your name. If 
> you can help explain how to reproduce such things by typing while using 
> apine over an ssh connection, using a standard US keyboard, I would be 
> glad of the explanation. My wife is Hungarian, and I am thus very 
> sensitized to the importance of the question, how to do the accents 
> required for writing Hungarian properly.

I just set up the Hungarian layout keyboard ( http://en.wikipedia.org/wiki/Keyboard_layout#Hungary )
in KDE and use it with UTF-8 encoding.

Regards,

	Márton Németh

Re: PAC7302 short datasheet from PixArt

[Németh Márton]

Hi,
Theodore Kilgore wrote:
> 
> On Sat, 30 Jan 2010, Németh Márton wrote:
> 
>> Hi,
>>
>> if anyone interested there is a brief overview datasheet about
>> PixArt PAC7301/PAC7302 at
>> http://www.pixart.com.tw/upload/PAC7301_7302%20%20Spec%20V1_20091228174030.pdf
>
> [...]
>
> Now, as to the substance of the mail above, thanks a lot. I had a bunch of 
> the PixArt datasheets already, but I had missed that one. I would have a 
> question, though:
> 
> This datasheet gives a lot of information about pinouts on the sensor chip 
> and such good stuff which might be useful if one were constructing a 
> circuit board on which to put the chip. What it does not give, very 
> unfortunately, is any information about the command set which needs to be 
> sent across the USB connection, which in turn actuates the circuits which 
> in turn sends something to the sensor across one of those pins. For 
> example, to set green gain one has to do something on connector X. But how 
> does one send a command from the computer which does something on 
> connector X? Some other datasheets from some other companies (Omnivision, 
> for example) do seem occasionally to provide such information.
> 
> Thus, a question for you or for anyone else who reads it:
> 
> Has anyone figured out any shortcuts for matching up the missing pieces of 
> information? Probably the answer is "no" but I think this is the kind of 
> question which is worth asking again on some periodic basis.

I have created some notes about my experiments, but they are only based on
trial-and-error. I started to created a PixArt PAC7301/PAC7302 Wiki page
this morning but the communication protocol details I could found out is
not yet finished. The page can be found at
http://linuxtv.org/wiki/index.php/PixArt_PAC7301/PAC7302 .

I hope I'll have the time to add a section about the communication protocol
details I could find out from the current gspca_pac7302 driver source code
and my experiments.

Regards,

	Márton Németh