[ECOS] ipaq touchscreen

[ECOS] ipaq touchscreen

[Tom Coremans]

Hi,

I am trying to get the touchscreen up and running for the ipaq.

When I use the function ts_get_event I get strange coordinates: they
range from (63,1023) to (63,51) and from (957,1023) to (957,51).

Shouldn`t they be somehing like (0,0) and (320,240) ?

Thanks,

Tom


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Re: [ECOS] ipaq touchscreen

[Gary Thomas]

On Mon, 2002-03-18 at 06:29, Tom Coremans wrote:
> Hi,
> 
> I am trying to get the touchscreen up and running for the ipaq.
> 
> When I use the function ts_get_event I get strange coordinates: they
> range from (63,1023) to (63,51) and from (957,1023) to (957,51).
> 
> Shouldn`t they be somehing like (0,0) and (320,240) ?

Did you calibrate it first?  The touch screen driver is self calibrating
and you need to touch all four corners at least once before relying on
any data to be accurate.


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Re: [ECOS] ipaq touchscreen

[Tom Coremans]

Gary Thomas wrote:

> On Mon, 2002-03-18 at 06:29, Tom Coremans wrote:
> > Hi,
> >
> > I am trying to get the touchscreen up and running for the ipaq.
> >
> > When I use the function ts_get_event I get strange coordinates: they
> > range from (63,1023) to (63,51) and from (957,1023) to (957,51).
> >
> > Shouldn`t they be somehing like (0,0) and (320,240) ?
>
> Did you calibrate it first?  The touch screen driver is self calibrating
> and you need to touch all four corners at least once before relying on
> any data to be accurate.
>

Thanks for replying but it doesn`t work yet.

When I start my program and poll the touchscreen with ts_get_event the
first thing I do is touch the four corners but the result is still the
same.

When do I have to do the calibration of the touchscreen? Is there a
function I have to call?

Thanks,

Tom


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Re: [ECOS] ipaq touchscreen

[Gary Thomas]

On Mon, 2002-03-18 at 06:57, Tom Coremans wrote:
> Gary Thomas wrote:
> 
> > On Mon, 2002-03-18 at 06:29, Tom Coremans wrote:
> > > Hi,
> > >
> > > I am trying to get the touchscreen up and running for the ipaq.
> > >
> > > When I use the function ts_get_event I get strange coordinates: they
> > > range from (63,1023) to (63,51) and from (957,1023) to (957,51).
> > >
> > > Shouldn`t they be somehing like (0,0) and (320,240) ?
> >
> > Did you calibrate it first?  The touch screen driver is self calibrating
> > and you need to touch all four corners at least once before relying on
> > any data to be accurate.
> >
> 
> Thanks for replying but it doesn`t work yet.
> 
> When I start my program and poll the touchscreen with ts_get_event the
> first thing I do is touch the four corners but the result is still the
> same.
> 
> When do I have to do the calibration of the touchscreen? Is there a
> function I have to call?

No - just touch the edges of the screen.

There are some diagnostics/prints that you can turn on in the driver
to see what it's doing.  Other than that, I'm not sure.


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Re: [ECOS] ipaq touchscreen

[Jonathan Larmour]

Gary Thomas wrote:
> 
> On Mon, 2002-03-18 at 06:57, Tom Coremans wrote:
> > Gary Thomas wrote:
> >
> > > On Mon, 2002-03-18 at 06:29, Tom Coremans wrote:
> > > > Hi,
> > > >
> > > > I am trying to get the touchscreen up and running for the ipaq.
> > > >
> > > > When I use the function ts_get_event I get strange coordinates: they
> > > > range from (63,1023) to (63,51) and from (957,1023) to (957,51).
> > > >
> > > > Shouldn`t they be somehing like (0,0) and (320,240) ?
> > >
> > > Did you calibrate it first?  The touch screen driver is self calibrating
> > > and you need to touch all four corners at least once before relying on
> > > any data to be accurate.
> > >
> >
> > Thanks for replying but it doesn`t work yet.
> >
> > When I start my program and poll the touchscreen with ts_get_event the
> > first thing I do is touch the four corners but the result is still the
> > same.
> >
> > When do I have to do the calibration of the touchscreen? Is there a
> > function I have to call?
> 
> No - just touch the edges of the screen.
> 
> There are some diagnostics/prints that you can turn on in the driver
> to see what it's doing.  Other than that, I'm not sure.

Was this the beastie that had the "wrapped" LCD screen where some of the
lines were at the wrong end of the screen or something like that?

Jifl
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