void calc_point()
{
	int i,j;
	int tweight=0;
	int xsum=0, ysum=0;
	double avgx, avgy;

	for(i=0; i < 30; i++)
	{
		for(j=0; j < 40; j++)
		{
			if(matrix[i][j] < 3)
				matrix[i][j] = 0;
			printf("%2.2X ", matrix[i][j]);
			tweight += matrix[i][j];
			ysum += matrix[i][j] * j;
			xsum += matrix[i][j] * i;
		}
		printf("\n");
	}
	avgx = xsum / (double)tweight;
	avgy = ysum / (double)tweight;

	printf("Coords %lf, %lf, %d\n", avgx,avgy, tweight);

	/* Single touch signals */
	send_uevent(uinput_fd, EV_ABS, ABS_X, avgx*1024.0/40);
	send_uevent(uinput_fd, EV_ABS, ABS_Y, avgy*768.0/30);
	send_uevent(uinput_fd, EV_ABS, ABS_PRESSURE, tweight);
	send_uevent(uinput_fd, EV_KEY, BTN_TOUCH, 1);
}