QT embedded and HID mouse, can i?

[webquinty]

Hello,

I have some doubts about QT and this kind of mouse.

1.- Can I use a HID mouse (touch screen TSC-10/USB) with QT embedded?
2.- If I can use it, QT embedded can use it without special driver or is it necessary to install a driver for touch screen?? TSLIB can not handle this kind of touch screen, only touch screen detected as input / event .
3.- If I can use it without driver, how can I configurate QT embedded to work with this device??

best regards
John Martin

[wysota]

I think you need to have a tslib enabled device... Qt doesn't handle such low-level things.

[webquinty]

I think you need to have a tslib enabled device... Qt doesn't handle such low-level things.

Hello wysota,

The problem is TSLIB can not handle this kind of devices, it is necessary to add support for this touch screen.

Well, I try to look for more information about how to obtain support for it.

Thank you

[wysota]

Maybe you can do that through evdev?

[webquinty]

Hello wysota,

Well, I have made some test with evdev, and it works with my touch screen.
I have found a test program and it works fine.

#include <stdlib.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <asm/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdint.h>
 
#include <linux/input.h>
 
 
int main (int argc, char **argv) {
 
    int fd = -1;        /* the file descriptor for the device */
    int yalv;           /* loop counter */
    size_t read_bytes;  /* how many bytes were read */
    struct input_event ev[64]; /* the events (up to 64 at once) */
 
    /* read() requires a file descriptor, so we check for one, and then open it */
    if (argc != 2) {
	fprintf(stderr, "usage: %s event-device - probably /dev/input/evdev0\n", argv[0]);
	exit(1);
    }
    if ((fd = open(argv[1], O_RDONLY)) < 0) {
	perror("evdev open");
	exit(1);
    }
 
    while (1)
	{
	read_bytes = read(fd, ev, sizeof(struct input_event) * 64);
 
	if (read_bytes < (int) sizeof(struct input_event)) {
	    perror("evtest: short read");
	    exit (1);
	}
 
	for (yalv = 0; yalv < (int) (read_bytes / sizeof(struct input_event)); yalv++)
	    {
		printf("Event: time %ld.%06ld, type %d, code %d, value %d\n",
		       ev[yalv].time.tv_sec, ev[yalv].time.tv_usec, ev[yalv].type,
		       ev[yalv].code, ev[yalv].value);
 
	    }
	}
 
    close(fd);
 
    exit(0);
}

#include <stdlib.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <asm/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdint.h>

#include <linux/input.h>


int main (int argc, char **argv) {

    int fd = -1;        /* the file descriptor for the device */
    int yalv;           /* loop counter */
    size_t read_bytes;  /* how many bytes were read */
    struct input_event ev[64]; /* the events (up to 64 at once) */

    /* read() requires a file descriptor, so we check for one, and then open it */
    if (argc != 2) {
	fprintf(stderr, "usage: %s event-device - probably /dev/input/evdev0\n", argv[0]);
	exit(1);
    }
    if ((fd = open(argv[1], O_RDONLY)) < 0) {
	perror("evdev open");
	exit(1);
    }

    while (1)
	{
	read_bytes = read(fd, ev, sizeof(struct input_event) * 64);

	if (read_bytes < (int) sizeof(struct input_event)) {
	    perror("evtest: short read");
	    exit (1);
	}

	for (yalv = 0; yalv < (int) (read_bytes / sizeof(struct input_event)); yalv++)
	    {
		printf("Event: time %ld.%06ld, type %d, code %d, value %d\n",
		       ev[yalv].time.tv_sec, ev[yalv].time.tv_usec, ev[yalv].type,
		       ev[yalv].code, ev[yalv].value);

	    }
	}

    close(fd);

    exit(0);
}

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But I have a doubt, how can I use it with QT???

best regards
John Martin

[webquinty]

Hello wysota,

Now it works fine. Finally , i use TSLIB with my touchscreen, TSC-10 DM.
The main problem was that TSLIB can not handle my touch screen, but now I known the reason.
TSLIB, check the device and look for some events, EV_ABS , ABS_X, ABS_Y and ABS_PRESSURE.
Well, my touch has not ABS_PRESSURE event.
Now I have made some changes in input-raw plugin and now it works fine.

I supposed that my touch screen works fine with TSLIB, QT can use my touch screen with TSLIB without any problem.

Best regards.

[damien]

I have a problem with my touchscreen if you can help me.
I can use ts_calibrate successfully but i can't use the touch screen in a QT application.
It isn't detected?
If you can see this thread http://www.qtcentre.org/forum/f-qtop...qte-15805.html