Hi Guys,
I have a custom ARM9 board and trying to use EETI eGalax touchscreen with it.
Single touch is good enough for me. (Controller: PCAP7200_DUAL_42X54_B_IC -
EXC205442CBG)
I am using tslib (1.0-106-gf6c499a) and Qt 4.8.0. My kernel version is 2.6.27.
I made it work with patching the usbtouchscreen driver.c in the below way. But
the points are very much jittered.
This what I got when I draw a circle.
http://img163.imageshack.us/img163/2003/imag0976u.jpg
Second option would be using it as HID Device but the result is even worse.
HID Device Descriptor of the touch controller defines 3 times and (I guess)
evdev connects wrong parameters to X and Y. evtest reports Rx and Z when I
touch it. Please see evtest output and usbhid debug output.
So did anyone came across a similar problem or have an idea how I can use this
touchscreen?
Best Regards
Gokhan
Index: drivers/input/touchscreen/usbtouchscreen.c
===================================================================
--- drivers/input/touchscreen/usbtouchscreen.c (revision 87)
+++ drivers/input/touchscreen/usbtouchscreen.c (working copy)
@@ -162,6 +162,7 @@
{USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
{USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
{USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
+ {USB_DEVICE(0x0eef, 0x7237), .driver_info = DEVTYPE_EGALAX},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
@@ -291,8 +292,8 @@
if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
return 0;
- dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
- dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
+ dev->x = ((pkt[2] & 0x0F) << 7) | (pkt[1] & 0xFF);
+ dev->y = ((pkt[4] & 0x0F) << 7) | (pkt[3] & 0xFF);
dev->touch = pkt[0] & 0x01;
return 1;
@@ -939,9 +940,9 @@
#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
[DEVTYPE_EGALAX] = {
.min_xc = 0x0,
- .max_xc = 0x07ff,
+ .max_xc = 0x0fff,
.min_yc = 0x0,
- .max_yc = 0x07ff,
+ .max_yc = 0x0fff,
.rept_size = 16,
.process_pkt = usbtouch_process_multi,
.get_pkt_len = egalax_get_pkt_len,
tslib.conf
======
module_raw input
module pthres pmin=1
module variance delta=30
module dejitter delta=100
module linear
evtest reports Rx and Z when I touch it:
Event: time 946686119.106410, -------------- Report Sync ------------
Event: time 946686119.220222, type 4 (Misc), code 4 (ScanCode), value 90001
Event: time 946686119.220251, type 1 (Key), code 272 (LeftBtn), value 0
Event: time 946686119.220299, -------------- Report Sync ------------
Event: time 946686129.466289, type 3 (Absolute), code 2 (Z), value 3278
Event: time 946686129.466324, type 3 (Absolute), code 3 (Rx), value 2698
Event: time 946686129.466340, -------------- Report Sync ------------
Event: time 946686129.468252, type 4 (Misc), code 4 (ScanCode), value 90001
Event: time 946686129.468274, type 1 (Key), code 272 (LeftBtn), value 1
Event: time 946686129.468330, -------------- Report Sync ------------
Event: time 946686129.662244, type 3 (Absolute), code 2 (Z), value 3274
Event: time 946686129.662288, -------------- Report Sync ------------
Event: time 946686129.673252, type 3 (Absolute), code 2 (Z), value 3270
Event: time 946686129.673295, -------------- Report Sync ------------
Event: time 946686129.683251, type 3 (Absolute), code 2 (Z), value 3266
Event: time 946686129.683291, -------------- Report Sync ------------
Event: time 946686129.694250, type 3 (Absolute), code 2 (Z), value 3262
Event: time 946686129.694289, -------------- Report Sync ------------
Event: time 946686129.705249, type 3 (Absolute), code 2 (Z), value 3258
usbhid debug outputs:
drivers/hid/hid-input.c: Mapping: Digitizers.TipSwitch ---> Key.Touch
drivers/hid/hid-input.c: Mapping: Digitizers.InRange ---> Key.ToolPen
drivers/hid/hid-input.c: Mapping: GenericDesktop.X ---> Absolute.X
drivers/hid/hid-input.c: Mapping: GenericDesktop.Y ---> Absolute.Y
drivers/hid/hid-input.c: Mapping: Button.0001 ---> Key.LeftBtn
drivers/hid/hid-input.c: Mapping: Button.0002 ---> Key.RightBtn
drivers/hid/hid-input.c: Mapping: GenericDesktop.X ---> Absolute.Z
drivers/hid/hid-input.c: Mapping: GenericDesktop.Y ---> Absolute.Rx
drivers/hid/hid-input.c: Mapping: Digitizers.TipSwitch ---> Key.Touch
drivers/hid/hid-input.c: Mapping: Digitizers.InRange ---> Key.ToolFinger
drivers/hid/hid-input.c: Mapping: Digitizers.0051 ---> Absolute.Misc
drivers/hid/hid-input.c: Mapping: Digitizers.0047 ---> Key.Btn0
drivers/hid/hid-input.c: Mapping: GenericDesktop.X ---> Absolute.Ry
drivers/hid/hid-input.c: Mapping: GenericDesktop.Y ---> Absolute.Rz------------------------------------------------------------------------------
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