(Sorry for top-post, don't know how to set it in web-mode) With 0x3:0x0 and 0x03:0x1 and additional the below event: > 17) 0x1 0x14a 0 don't know what it is That is meaning "emulate one button release event", which will make single-point touch behave like one mouse click.
But from your post, seemed something were missed, it should have more 0x1:0x14a:0(release)/1(press) event. 2011/4/22 Daniel Kurtz <djku...@chromium.org> > Paolo, > On Fri, Apr 22, 2011 at 4:10 PM, Paolo Olivo <olivopa...@tiscali.it> > wrote: > > > > Hello everyone, > > > > I am developing a mt toolkit, which I would like to interface to > > libmtdev. I am using a Dell XT2 and a 3M M2256PW touchscreen on Ubuntu > > 10.10, kernel 2.6.35-28-generic, libmtdev1.1.0. > > > > I started capturing mtdev events, but I found something weird. I don't > > know if they are bugs or it is simply my misunderstanding. > > > > First, using function "mtdev_has_mt_event" on the XT2 and passing > > ABS_MT_SLOT and ABS_MT_TRACKING_ID, in both cases it returns 0, while > > I actually receive ABS_MT_SLOT and ABS_MT_TRACKING_ID events using > > "mtdev_get". 3M is working fine. > > > > The second issue is about the order of the received events and I found > > a weird behavior on the XT2: > > > > This is a screenshot of 3M mtdev events: > > #) ev->type ev->code ev->value > > > > .... > > > > 1) 0x3 0x2f 0 SELECT SLOT 0 > > 2) 0x3 0x39 -1 SET TRACKING_ID TO -1 > > 3) 0x3 0x2f 1 SELECT SLOT 1 > > 4) 0x3 0x35 14214 SET ABS_MT_POSITION_X > > 5) 0x3 0x36 14907 SET ABS_MT_POSITION_Y > > 6) 0x3 0x30 1207 SET ABS_MT_TOUCH_MAJOR > > 7) 0x3 0x0 14214 don't know but it has the same > > value as 4) > > 8) 0x3 0x1 14907 don't know but is has the same > > value as 5) > > 9) 0x0 0x0 0 EV_SYN > > > > 10) 0x3 0x35 14278 SET ABS_MT_POSITION_X > > 11) 0x3 0x36 14979 SET ABS_MT_POSITION_Y > > 12) 0x3 0x30 1172 SET ABS_MT_TOUCH_MAJOR > > 13) 0x3 0x0 14278 don't know but it has the same > > value as 10) > > 14) 0x3 0x1 14979 don't know but it has the same > > value as 11) > > 15) 0x0 0x0 0 EV_SYN > > > > 16) 0x3 0x39 -1 SET TRACKING_ID TO -1 > > 17) 0x1 0x14a 0 don't know what it is > > 18) 0x0 0x0 0 EV_SYN > > > > This is a screenshot of XT2 mtdev events: > > > > .... > > > > 20) 0x3 0x0 6295 don't know but it has the > > same value as 24) > > 21) 0x3 0x1 3548 don't know but it has the > > same value as 25) > > 22) 0x3 0x2f 1 SELECT SLOT 1 > > 23) 0x3 0x31 247 SET ABS_MT_TOUCH_MINOR > > 24) 0x3 0x35 6295 SET ABS_MT_POSITION_X > > 25) 0x3 0x36 3548 SET ABS_MT_POSITION_Y > > 26) 0x3 0x2f 0 SELECT SLOT 0 > > 27) 0x3 0x39 -1 SET TRACKING_ID TO -1 > > 28) 0x0 0x0 0 EV_SYN > > > > 29) 0x3 0x0 6306 don't know but it has the > > same value as 33) which will be for slot 1 BUT current slot is 0! > > 30) 0x3 0x1 3620 don't know but it has the > > same value as 34) which will be for slot 1 BUT current slot is 0! > > 31) 0x3 0x2f 1 SELECT SLOT 1 > > 32) 0x3 0x34 1 SET ABS_MT_ORIENTATION > > 33) 0x3 0x35 6306 SET ABS_MT_POSITION_X > > 34) 0x3 0x36 3620 SET ABS_MT_POSITION_Y > > 35) 0x0 0x0 0 EV_SYN > > > > So on XT2 events type 0x03 with value 0x0 and 0x1 are sent first SLOT > > selection. Is it right? > > Does anybody know what are they? > > 0x3:0x0 and 0x03:0x1 are legacy non-MT events ABS_X and ABS_Y, > respectively. > I'm not sure exactly how the driver chooses which contact to use for > generating these single touch events, but my guess from your snippet > is the lowest slot that happens to be on the surface. > > -Daniel > > > > > I hope this could be useful, > > thanks for consideration. > > > > Paolo > > > > _______________________________________________ > > Mailing list: https://launchpad.net/~multi-touch-dev > > Post to : multi-touch-dev@lists.launchpad.net > > Unsubscribe : https://launchpad.net/~multi-touch-dev > > More help : https://help.launchpad.net/ListHelp > > _______________________________________________ > Mailing list: https://launchpad.net/~multi-touch-dev > Post to : multi-touch-dev@lists.launchpad.net > Unsubscribe : https://launchpad.net/~multi-touch-dev > More help : https://help.launchpad.net/ListHelp >
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