Re: [RFC][PATCH] USB touch screen driver, all-in-one
From: Lanslott Gish
Date: Tue Mar 21 2006 - 01:36:21 EST
On 3/17/06, Lanslott Gish <lanslott.gish@xxxxxxxxx> wrote:
> On 3/16/06, Daniel Ritz <daniel.ritz-ml@xxxxxxxxxxxxxx> wrote:
> that just can't be right. you probably mean
> + *y = pkt[3] | ((pkt[4] & 0x0F) << 8);
>
> otherwise you mask out bits 4-7. but you want to limit it to 12 bits...
> (btw. no need for the & 0xFF mask since *pkt is char)
>
>
> you are right, sorry for my fault. the truely way is
>
> + *x = (pkt[1] & 0xFF) | ((pkt[2] & 0x0F) << 8);
> + *y = (pkt[3] & 0xFF) | ((pkt[4] & 0x0F) << 8);
>
> still need 12 bits( 0x0FFF) and the masks to avoid get negative.
>
OK, Here we go~
i try your patch:
+ printk("pkg_dbg,%x,%x,%x,%x\n",pkt[1],pkt[2],pkt[3],pkt[4]);
+ *x = pkt[1] | ((pkt[2] & 0x0F) << 8);
+ *y = pkt[3] | ((pkt[4] & 0x0F) << 8);
+ printk("touchset_dbg,%x,%x,%d,%d\n",*x,*y,*x,*y);
and here is parts of the /var/log/message (raw data from 4 corners of
the panel):
---------------------------------------------------------------------------
Mar 21 14:33:52 localhost kernel: input: PANJIT TouchSet USB Touch
Panel as /class/input/input12
Mar 21 14:33:55 localhost input.agent[10300]: joydev: already loaded
Mar 21 14:34:38 localhost kernel: pkg_dbg,fffffff9,1,2d,e
Mar 21 14:34:38 localhost kernel: touchset_dbg,fffffff9,e2d,-7,3629
Mar 21 14:34:38 localhost kernel: pkg_dbg,fffffff8,1,2c,e
Mar 21 14:34:38 localhost kernel: touchset_dbg,fffffff8,e2c,-8,3628
Mar 21 14:34:38 localhost kernel: pkg_dbg,fffffff4,1,2d,e
Mar 21 14:34:38 localhost kernel: touchset_dbg,fffffff4,e2d,-12,3629
Mar 21 14:34:38 localhost kernel: pkg_dbg,fffffff2,1,2d,e
Mar 21 14:34:38 localhost kernel: touchset_dbg,fffffff2,e2d,-14,3629
Mar 21 14:34:38 localhost kernel: pkg_dbg,fffffff1,1,2e,e
Mar 21 14:34:38 localhost kernel: touchset_dbg,fffffff1,e2e,-15,3630
Mar 21 14:34:39 localhost kernel: pkg_dbg,20,3,ffffffae,2
Mar 21 14:34:39 localhost kernel: touchset_dbg,320,ffffffae,800,-82
Mar 21 14:34:39 localhost kernel: pkg_dbg,20,3,ffffffae,2
Mar 21 14:34:39 localhost kernel: touchset_dbg,320,ffffffae,800,-82
Mar 21 14:34:39 localhost kernel: pkg_dbg,1d,3,ffffffb2,2
Mar 21 14:34:39 localhost kernel: touchset_dbg,31d,ffffffb2,797,-78
Mar 21 14:34:39 localhost kernel: pkg_dbg,1b,3,ffffffb4,2
Mar 21 14:34:39 localhost kernel: touchset_dbg,31b,ffffffb4,795,-76
Mar 21 14:34:41 localhost kernel: pkg_dbg,ffffffa4,c,75,d
Mar 21 14:34:41 localhost kernel: touchset_dbg,ffffffa4,d75,-92,3445
Mar 21 14:34:41 localhost kernel: pkg_dbg,ffffffa4,c,7a,d
Mar 21 14:34:41 localhost kernel: touchset_dbg,ffffffa4,d7a,-92,3450
Mar 21 14:34:41 localhost kernel: pkg_dbg,ffffffa2,c,ffffff81,d
Mar 21 14:34:41 localhost kernel: touchset_dbg,ffffffa2,ffffff81,-94,-127
Mar 21 14:34:41 localhost kernel: pkg_dbg,ffffff9d,c,ffffff87,d
Mar 21 14:34:41 localhost kernel: touchset_dbg,ffffff9d,ffffff87,-99,-121
Mar 21 14:34:42 localhost kernel: pkg_dbg,ffffff86,d,ffffffcf,1
Mar 21 14:34:42 localhost kernel: touchset_dbg,ffffff86,ffffffcf,-122,-49
Mar 21 14:34:42 localhost kernel: pkg_dbg,74,d,ffffffd7,1
Mar 21 14:34:42 localhost kernel: touchset_dbg,d74,ffffffd7,3444,-41
Mar 21 14:34:42 localhost kernel: pkg_dbg,58,d,ffffffe0,1
Mar 21 14:34:42 localhost kernel: touchset_dbg,d58,ffffffe0,3416,-32
----------------------------------------------------------------------
is anything weird?
and i try my codes:
+ printk("pkg_dbg,%x,%x,%x,%x\n",pkt[1],pkt[2],pkt[3],pkt[4]);
+ *x = (pkt[1] & 0xFF) | ((pkt[2] & 0x0F) << 8);
+ *y = (pkt[3] & 0xFF) | ((pkt[4] & 0x0F) << 8);
+ printk("touchset_dbg,%x,%x,%d,%d\n",*x,*y,*x,*y);
and here is the /var/log/message (the same, 4 coners):
---------------------------------------------------------------------
Mar 21 14:38:14 localhost kernel: usbcore: deregistering driver usbtouchscreen
Mar 21 14:38:14 localhost kernel: input: PANJIT TouchSet USB Touch
Panel as /class/input/input14
Mar 21 14:38:14 localhost kernel: usbcore: registered new driver usbtouchscreen
Mar 21 14:38:17 localhost input.agent[10688]: joydev: already loaded
Mar 21 14:38:38 localhost kernel: pkg_dbg,5,2,6,e
Mar 21 14:38:38 localhost kernel: touchset_dbg,205,e06,517,3590
Mar 21 14:38:38 localhost kernel: pkg_dbg,fffffffe,1,13,e
Mar 21 14:38:38 localhost kernel: touchset_dbg,1fe,e13,510,3603
Mar 21 14:38:38 localhost kernel: pkg_dbg,fffffff0,1,22,e
Mar 21 14:38:38 localhost kernel: touchset_dbg,1f0,e22,496,3618
Mar 21 14:38:39 localhost kernel: pkg_dbg,ffffffd5,2,ffffff99,2
Mar 21 14:38:39 localhost kernel: touchset_dbg,2d5,299,725,665
Mar 21 14:38:39 localhost kernel: pkg_dbg,ffffffd2,2,ffffff9a,2
Mar 21 14:38:39 localhost kernel: touchset_dbg,2d2,29a,722,666
Mar 21 14:38:39 localhost kernel: pkg_dbg,ffffffce,2,ffffff9c,2
Mar 21 14:38:39 localhost kernel: touchset_dbg,2ce,29c,718,668
Mar 21 14:38:39 localhost kernel: pkg_dbg,ffffffc9,2,ffffff9e,2
Mar 21 14:38:39 localhost kernel: touchset_dbg,2c9,29e,713,670
Mar 21 14:38:41 localhost kernel: pkg_dbg,6e,d,ffffffec,d
Mar 21 14:38:41 localhost kernel: touchset_dbg,d6e,dec,3438,3564
Mar 21 14:38:41 localhost kernel: pkg_dbg,71,d,ffffffed,d
Mar 21 14:38:41 localhost kernel: touchset_dbg,d71,ded,3441,3565
Mar 21 14:38:41 localhost kernel: pkg_dbg,72,d,ffffffed,d
Mar 21 14:38:41 localhost kernel: touchset_dbg,d72,ded,3442,3565
Mar 21 14:38:41 localhost kernel: pkg_dbg,71,d,ffffffed,d
Mar 21 14:38:41 localhost kernel: touchset_dbg,d71,ded,3441,3565
Mar 21 14:38:41 localhost kernel: pkg_dbg,5f,d,ffffffec,d
Mar 21 14:38:41 localhost kernel: touchset_dbg,d5f,dec,3423,3564
Mar 21 14:38:42 localhost kernel: pkg_dbg,ffffffac,d,ffffffd0,1
Mar 21 14:38:42 localhost kernel: touchset_dbg,dac,1d0,3500,464
Mar 21 14:38:42 localhost kernel: pkg_dbg,ffffffae,d,ffffffd0,1
Mar 21 14:38:42 localhost kernel: touchset_dbg,dae,1d0,3502,464
Mar 21 14:38:42 localhost kernel: pkg_dbg,ffffffa3,d,ffffffdb,1
Mar 21 14:38:42 localhost kernel: touchset_dbg,da3,1db,3491,475
Mar 21 14:38:42 localhost kernel: pkg_dbg,ffffff92,d,ffffffe6,1
Mar 21 14:38:42 localhost kernel: touchset_dbg,d92,1e6,3474,486
---------------------------------------------------------------------
i think my codes is correct.
so, make sure that your device differ with mine. :)
regards,
Lanslott Gish
--
L.G, Life's Good~
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