multi-touch-dev team mailing list archive

[Rafi Rubin <rafi@xxxxxxxxxxxxxx>]

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On 04/08/10 20:24, Bryce Harrington wrote:
> On Thu, Apr 08, 2010 at 05:46:20PM -0400, Rafi Rubin wrote:
>>> Bus 002 Device 010: ID 1926:0064  
>>> Bus 002 Device 009: ID 0424:2514 Standard Microsystems Corp. 
>>> Bus 002 Device 008: ID 05a9:2656 OmniVision Technologies, Inc. 
>>> Bus 002 Device 007: ID 0424:2512 Standard Microsystems Corp. 
>>
>> ps. that looks like a cool screen.
> 
> Yeah it's slick looking but the screen is very glossy and a bit too
> reflective.  It runs a lot cooler than my BENQ's.
> 
>> quick google search suggests omnivision is a camera and smsc makes "capacitive
>> touch sensors" among other things.
> 
> Device 10 seems to be the touchscreen device.  Not sure why it didn't
> show a name in the lsusb output.
> 
> Bryce

Since you have an event device, you shouldn't need to mod the kernel for the
first round of testing.  IS_INPUT_APPLICATION probably is not a problem.

The names aren't set entirely automatically.  I only added the "N-Trig *"
strings pretty recently (feb I think).  I'm not sure why its not doing a better
job of naming generic devices.  Perhaps that's something I should explore when I
have time.


Would you grab me a binary capture of the event device, and which ever of the
hiddev nodes is active.


If you want a quick test, run finger_pos on the event device.  I'm raising the
finger limit to 20, just for you.  The smsc site lists sensors from 3 to 14
"channels", and I'd like to see how many fingers yours handles, well you might
need to use some toes if you do have the 14 channel controller.

Rafi
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/*
  Desktop switch sample, needs KWin to run
*/

#include <linux/input.h>
#include <stdint.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
//#include "stan.h"

typedef struct point { int x; int y; int id; } point;
point   points[20]= { [0 ... 19] = {.x=0, .y=0, .id=-1 } };

int st_x;
int st_y;
int gesture[20][2] = {[0 ... 19][0 ... 1] = 0} ;
int totalC=0;
int sensitivity=8000; // define the sensitivity of the gesture recognition


void print_points(int n)
{
	int i=0;
	/*
	printf("     st    ",i);
	for(i=0;i<n;i++)
	{
		printf("     %d     ",i);
	}*/
	//printf("\n");
//	printf(" %4d,%4d ",st_x,st_y);
	for(i=0;i<n;i++)
	{
		if(points[i].id>=0)
			printf(" %4d,%4d ",points[i].x,points[i].y);
		else
			printf("%11s","");
	}
	printf("\n");
}
/////////////////////////////////////////////////////////////////////

int main (int argc, char **argv)
{
	int fd, rd, i, j, k;
	struct input_event ev[64];
	int version;
	unsigned short id[4];
	char name[256] = "Unknown";

	struct point tmpP;
	int contactsNum=0, actual=0, change=0;

	if (argc < 2) {
		printf("Usage: evtest /dev/input/eventX\n");
		return 1;
	}
	if ((fd = open(argv[argc - 1], O_RDONLY)) < 0) {
		perror("evtest");
		return 1;
	}
	ioctl(fd, EVIOCGNAME(sizeof(name)), name);
	printf("Input device name: \"%s\"\n", name);

	printf("Reading input from device ... (interrupt to exit)\n");
	tmpP.id=0;
	while (1) { // Main loop
		rd = read(fd, ev, sizeof(struct input_event) * 64);
		if (rd < (int) sizeof(struct input_event)) {
			perror("\nevtest: error reading");
			return 1;
		}
		for (i = 0; i < rd / sizeof(struct input_event); i++)
			if (ev[i].type == EV_SYN) {

				if (2==ev[i].code) { // MT_Sync : Multitouch event end
					if(tmpP.id++>=0)
					{
						points[tmpP.id].id=tmpP.id;
						points[tmpP.id].x=tmpP.x;
						points[tmpP.id].y=tmpP.y;
					}
				} else if (0==ev[i].code) { // Ev_Sync event end
					if(tmpP.id>=0)
					{
				      totalC=tmpP.id+1;
				      contactsNum=0; 
						print_points(tmpP.id+1);
						tmpP.id=-1;
						tmpP.x=0;
						tmpP.y=0;
						for(j=0;j<10;j++)
						{
							points[j].id=-1;
						}
					}
					tmpP.id=0;
				}
			} else if (ev[i].type == EV_MSC && (ev[i].code == MSC_RAW || ev[i].code == MSC_SCAN)) {
			} else {
				//printf("code %d\n",ev[i].code);
//					if (ev[i].code==57) { tmpP.id = ev[i].value; contactsNum++; }
					if (ev[i].code==0)   st_x  = ev[i].value;
					if (ev[i].code==1)   st_y  = ev[i].value;
					if (ev[i].code==53)   tmpP.x  = ev[i].value;
					if (ev[i].code==54)   tmpP.y  = ev[i].value;
			} /* Every multitouch single point is saved in order to be handled */
	}
}