Hi all,
I have a PiTFT, a 2.8" capacitive touchscreen for the Raspberry Pi on
raspbian (gtk 3.10.x). It works perfect, except that I only receive button
events, and I fail to receive touch events. Also kinetic scrolling is not
working. What can I do to fix this?
I tried various things to get more information. This is what is reported in
Xorg.log:
[ 486.549] (II) config/udev: Adding input device stmpe-ts
(/dev/input/event0)
[ 486.549] (**) stmpe-ts: Applying InputClass "evdev touchscreen catchall"
[ 486.549] (**) stmpe-ts: Applying InputClass "calibration"
[ 486.550] (II) LoadModule: "evdev"
[ 486.552] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[ 486.553] (II) Module evdev: vendor="X.Org Foundation"
[ 486.553] compiled for 1.12.1, module version = 2.7.0
[ 486.553] Module class: X.Org XInput Driver
[ 486.553] ABI class: X.Org XInput driver, version 16.0
[ 486.553] (II) Using input driver 'evdev' for 'stmpe-ts'
[ 486.554] (**) stmpe-ts: always reports core events
[ 486.554] (**) evdev: stmpe-ts: Device: "/dev/input/event0"
[ 486.555] (--) evdev: stmpe-ts: Vendor 0 Product 0
[ 486.555] (--) evdev: stmpe-ts: Found absolute axes
[ 486.555] (--) evdev: stmpe-ts: Found x and y absolute axes
[ 486.555] (--) evdev: stmpe-ts: Found absolute touchscreen
[ 486.555] (**) Option "SwapAxes" "1"
[ 486.556] (II) evdev: stmpe-ts: Configuring as touchscreen
[ 486.556] (**) Option "EmulateThirdButton" "1"
[ 486.556] (**) Option "EmulateThirdButtonTimeout" "750"
[ 486.557] (**) Option "EmulateThirdButtonMoveThreshold" "30"
[ 486.557] (**) evdev: stmpe-ts: YAxisMapping: buttons 4 and 5
[ 486.557] (**) evdev: stmpe-ts: EmulateWheelButton: 4,
EmulateWheelInertia: 10, EmulateWheelTimeout: 200
[ 486.558] (**) Option "config_info"
"udev:/sys/devices/soc/20204000.spi/spi_master/spi0/spi0.1/stmpe-ts/input/input0/event0"
[ 486.558] (II) XINPUT: Adding extended input device "stmpe-ts" (type:
TOUCHSCREEN, id 6)
[ 486.559] (II) evdev: stmpe-ts: initialized for absolute axes.
[ 486.561] (**) stmpe-ts: (accel) keeping acceleration scheme 1
[ 486.561] (**) stmpe-ts: (accel) acceleration profile 0
[ 486.561] (**) stmpe-ts: (accel) acceleration factor: 2.000
[ 486.561] (**) stmpe-ts: (accel) acceleration threshold: 4
[ 486.565] (II) config/udev: Adding input device stmpe-ts
(/dev/input/mouse0)
[ 486.565] (**) stmpe-ts: Applying InputClass "calibration"
It seems that X does detect a touchscreen. The event also seems to generate
touch events, evtest shows touch events, pressure and absolute positioning
which I think correspond to a touchscreen:
$ evtest
No device specified, trying to scan all of /dev/input/event*
Not running as root, no devices may be available.
Available devices:
/dev/input/event0: stmpe-ts
Select the device event number [0-0]: 0
Input driver version is 1.0.1
Input device ID: bus 0x18 vendor 0x0 product 0x0 version 0x0
Input device name: "stmpe-ts"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event code 330 (BTN_TOUCH)
Event type 3 (EV_ABS)
Event code 0 (ABS_X)
Value 3014
Min 0
Max 4095
Event code 1 (ABS_Y)
Value 2942
Min 0
Max 4095
Event code 24 (ABS_PRESSURE)
Value 0
Min 0
Max 255
Properties:
Testing ... (interrupt to exit)
Event: time 1445753599.628119, type 3 (EV_ABS), code 0 (ABS_X), value 1681
Event: time 1445753599.628119, type 3 (EV_ABS), code 1 (ABS_Y), value 2933
Event: time 1445753599.628119, type 3 (EV_ABS), code 24 (ABS_PRESSURE),
value 113
Event: time 1445753599.628119, type 1 (EV_KEY), code 330 (BTN_TOUCH),
value 1
Event: time 1445753599.628119, -------------- SYN_REPORT ------------
Event: time 1445753599.637296, type 3 (EV_ABS), code 0 (ABS_X), value 1639
Event: time 1445753599.637296, type 3 (EV_ABS), code 1 (ABS_Y), value 2967
Event: time 1445753599.637296, type 3 (EV_ABS), code 24 (ABS_PRESSURE),
value 131
If I call device.get_source() after a button press event, I get <enum
GDK_SOURCE_MOUSE of type GdkInputSource>
If I add touch events with eventbox.add_events(Gdk.EventMask.TOUCH_MASK)
and connect to the touch-event I get no callback calls.
If I try the example code from
http://www.digitaloctave.com/pages/gtk3/tutorial14.htm I don't get a touch
output either..
So what could be wrong, and how could this be fixed?
Thank you for any help on this matter
Olivier
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