Sample mouse driver source needed

QNX Newsgroups (Archives) comp.os.qnx
1

i need to develop a very basic touch screen driver to use instead of the
available devices provided in the INPUT driver with QNX 4.25. Any sample
code or hints would be appreciated. Thanks

2

Have also interest !! Jörg

“John P. Larson” schrieb:

i need to develop a very basic touch screen driver to use instead of the
available devices provided in the INPUT driver with QNX 4.25. Any sample
code or hints would be appreciated. Thanks

–

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3

Previously, Jörg Kampmann wrote in comp.os.qnx:

Have also interest !! Jörg

Below is some basic code that causes a Mouse event to
be emitted. Most touch screens provide an input
serial screen which must be decoded and turned into
Mouse events. I think that that’s all the secrets.
The rest is just hard work.

You might want to see if QSSL will provide a sample
of their code.

Mitchell Schoenbrun --------- maschoen@pobox.com


#include <libc.h>
#include <time.h>
#include <Ph.h>
#include <assert.h>
#include <photon/PhT.h>
#define POSX 100
#define POSY 100

main( int argc, char *argv[] )
{
PhEvent_t event;
PhRect_t rect;
PhPointerEvent_t data;
int ret;

if ( NULL == PhAttach( NULL, NULL ) )
{
fprintf( stderr,“Couldn’t attach Photon channel.\n”);
exit( EXIT_FAILURE );
}

memset(&data,0,sizeof(data));
data.pos.x = POSX;
data.pos.y = POSY;

data.buttons = Ph_BUTTON_SELECT;
data.click_count = 1;
//data.buttons = Ph_BUTTON_MENU;
//data.buttons = Ph_BUTTON_ADJUST;

event.type = Ph_EV_BUT_PRESS;
event.subtype = 0;
event.emitter.rid = Ph_DEV_RID;
event.processing_flags = 0;
event.input_group = get_input_group();
event.flags = 0;
event.num_rects = 1;
event.data_len = sizeof(data);

rect.ul.x = POSX;
rect.ul.y = POSY;
rect.lr.x = POSX+1;
rect.lr.y = POSY+1;

ret = PhEventEmit( &event, &rect, &data );
if (ret == -1 && errno != ENOMSG)
{
fprintf(stderr,“Press ret %d\n”,ret);
perror(“Press”);
exit(-1);
}
sleep(1);

event.type = Ph_EV_BUT_RELEASE;
event.subtype = Ph_EV_RELEASE_REAL;
ret = PhEventEmit( &event, &rect, &data );
if (ret == -1 && errno != ENOMSG)
{
fprintf(stderr,“Release ret %d\n”,ret);
perror(“Release”);
}
}



int get_input_group( void )
{
char *ig_string;
int input_group;
PhRid_t rid;
PhRect_t rect;
PhRegion_t region;

/* Much of this code is referenced from
/usr/photon/apps/savers/puzzle.c */

ig_string = getenv( “PHIG” );
if ( ig_string )
input_group = atoi( ig_string );
else
input_group = 0;

PhQueryRids( 0, 0, input_group, Ph_INPUTGROUP_REGION, 0, 0, 0, &rid, 1 );
PhRegionQuery( rid, &region, &rect, NULL, 0 );

input_group = region.input_group;

return ( input_group );
}

4

Mitchell Schoenbrun <maschoen@pobox.com> wrote:

Most touch screens provide an input
serial screen which must be decoded and turned into
Mouse events. I think that that’s all the secrets.

u get get it… just poll /dev/ser1 while u move your finger over it…
(that’s how it turned out for mouse … i need a touch screen to actually
test it :wink:

–
Keep Smiling

Mechanically Yours

  • Mritunjai

II Year Sophomore
Mechanical Engg.
Indian Institute of Technology Bombay
India


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