My configuration:
- Raspberry 2
- Rune V0.3
- 3.5 TFT from AliExpress similar with Waveshare screen
To get the TFT online i used following post (http://www.runeaudio.com/forum/waveshare-spotspear-3-5-touch-screen-working-with-rune-t3859.html#p16516. One remark here: pacman -S xf86-video-fbturbo didn't run on my installation in the right way ->
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"looking for conflicting packages...
:: xf86-video-fbturbo-git and xorg-server are in conflict (X-ABI-VIDEODRV_VERSION). Remove xorg-server? [y/N]....
To solve this conflict i confirmed the first step and installed the server again in a second step. But this is not my current problem....
The screen works very well but unfortunately without touchscreen functionality. I did run evtest and it worked:
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evtest
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0: HP HP Link-5 micro dongle
/dev/input/event1: HP HP Link-5 micro dongle
/dev/input/event2: ADS7846 Touchscreen
Select the device event number [0-2]: 2
Input driver version is 1.0.1
Input device ID: bus 0x0 vendor 0x0 product 0x0 version 0x0
Input device name: "ADS7846 Touchscreen"
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 2830
Min 0
Max 4095
Event code 1 (ABS_Y)
Value 641
Min 0
Max 4095
Event code 24 (ABS_PRESSURE)
Value 0
Min 0
Max 65535
Properties:
Testing ... (interrupt to exit)
Event: time 1485044728.358846, type 1 (EV_KEY), code 330 (BTN_TOUCH), value 1
Event: time 1485044728.358846, type 3 (EV_ABS), code 0 (ABS_X), value 2165
Event: time 1485044728.358846, type 3 (EV_ABS), code 1 (ABS_Y), value 562
DISPLAY=:0.0 xinput_calibrator works too:
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Calibrating standard Xorg driver "ADS7846 Touchscreen"
current calibration values: min_x=0, max_x=65535 and min_y=0, max_y=65535
If these values are estimated wrong, either supply it manually with the --precalib option, or run the 'get_precalib.sh' script to automatically get it (through HAL).
INFO: width=480, height=320
--> Making the calibration permanent <--
copy the snippet below into '/etc/X11/xorg.conf.d/99-calibration.conf' (/usr/share/X11/xorg.conf.d/ in some distro's)
Section "InputClass"
Identifier "calibration"
MatchProduct "ADS7846 Touchscreen"
Option "MinX" "22095"
Option "MaxX" "22277"
Option "MinY" "49271"
Option "MaxY" "49134"
Option "SwapXY" "1" # unless it was already set to 1
Option "InvertX" "0" # unless it was already set
Option "InvertY" "0" # unless it was already set
EndSection
The values of MinX, MaxX, MinY, MaxY are very high...but i'm not sure if this could be the problem. Who can help?
regards Peer
