nanogui: Thread: Microwindows, Touch Screen & calibration

O.K. I have built Microwindows and have enabled the "IPAQ" TS code. I
modified the ucb1200_ts code to work with my ARM hardware. All of that
code is working. (I can manipulate the mine game.)

Now I need to calibrate the touch screen. Does any code exist for doing
that on the ARM platform? The ucb1200_ts code is suppose to have
Microwin style calibration.

In the past I have been pointed to tpcal.

ftp://ftp.ltc.com/pub/linux/mips/

This code depends upon *.h files that do not exist in my configuration.
$gcc tp.c
tp.c:37: linux/tpanel.h: No such file or directory
tp.c:457: ../kdrive/kdrive.h: No such file or directory

Any pointers would be appreciated.

Scott

: O.K. I have built Microwindows and have enabled the "IPAQ" TS code. I
: modified the ucb1200_ts code to work with my ARM hardware. All of that
: code is working. (I can manipulate the mine game.)

Cool.  BTW, I'm interested in keeping any enhancements/modifications
to kernel touch panel drivers if you'd like to send them. ;-)



: 
: Now I need to calibrate the touch screen. Does any code exist for doing
: that on the ARM platform? The ucb1200_ts code is suppose to have
: Microwin style calibration.

There's a working touch panel calibrator for the linux-vr
style touch screen driver in the Microwindows source that
Brad LaRonde wrote.  It's GPL, so it's in
microwin/src/contrib/GPL/tpcal

Check it out.  I've checked this version against the latest 0.88
sources (patch1)

Regards,

Greg




: 
: In the past I have been pointed to tpcal.
: 
: ftp://ftp.ltc.com/pub/linux/mips/
: 
: This code depends upon *.h files that do not exist in my configuration.
: $gcc tp.c
: tp.c:37: linux/tpanel.h: No such file or directory
: tp.c:457: ../kdrive/kdrive.h: No such file or directory
: 
: Any pointers would be appreciated.
: 
: Scott
: 
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Greg Haerr wrote:

> There's a working touch panel calibrator for the linux-vr
> style touch screen driver in the Microwindows source that
> Brad LaRonde wrote.  It's GPL, so it's in
> microwin/src/contrib/GPL/tpcal

Ok I have done that cross compiled it and stuffed it into my RAM Disk.

When I run tpcal it hands back seven parameters. With the MIPS code
those values
were placed into /etc/pointercal. Which mou_tp.c would read and use to
adjust the
values being returned from the touch screen device. (calibration occured
on the application side.)

I notice that the ts_ioctl supports seven commands. So do those seven
values represent (raw_max_x, raw_max_y, res_x, res_y, raw_min_x,
raw_min_y, xyswp)?

Not knowing what they are I do not know what to do with them. Nor can I
tell if the values I am getting are reasonable.
tpcal results: (-273605, -633, 174383829, -700, 278166, -4003337, 65536)


Should I send them to ts_ioctl cmd's 3-12?

Thanks,
Scott

: tpcal results: (-273605, -633, 174383829, -700, 278166, -4003337, 65536)
: 
: 
: Should I send them to ts_ioctl cmd's 3-12?

probably.  the mou_tp.c code should tell you what it does
with them, it opens up /etc/pointercal, doesn't it?

tpcal produces transformation coefficients for mou_tp.  mou_tp uses the
coefficients to transform raw touch panel data to (x,y) screen data.  This 
has nothing to do with ts_ioctls.

Regards,
Brad

On Thu, 7 Sep 2000, S A McConnell wrote:

> Greg Haerr wrote:
> 
> > There's a working touch panel calibrator for the linux-vr
> > style touch screen driver in the Microwindows source that
> > Brad LaRonde wrote.  It's GPL, so it's in
> > microwin/src/contrib/GPL/tpcal
> 
> Ok I have done that cross compiled it and stuffed it into my RAM Disk.
> 
> When I run tpcal it hands back seven parameters. With the MIPS code
> those values
> were placed into /etc/pointercal. Which mou_tp.c would read and use to
> adjust the
> values being returned from the touch screen device. (calibration occured
> on the application side.)
> 
> I notice that the ts_ioctl supports seven commands. So do those seven
> values represent (raw_max_x, raw_max_y, res_x, res_y, raw_min_x,
> raw_min_y, xyswp)?
> 
> Not knowing what they are I do not know what to do with them. Nor can I
> tell if the values I am getting are reasonable.
> tpcal results: (-273605, -633, 174383829, -700, 278166, -4003337, 65536)
> 
> 
> Should I send them to ts_ioctl cmd's 3-12?
> 
> Thanks,
> Scott
> 
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> To unsubscribe, e-mail: ####@####.####
> For additional commands, e-mail: ####@####.####
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