目的：旋轉屏幕顯示的同時，使得觸摸也跟隨旋轉
操作總流程：
旋轉180度操作
1.sudo nano /boot/config.txt
2.在文件末尾加入
display_rotate=0
display_rotate=1? //90°
display_rotate=2? //180°
display_rotate=3? //270°
ctrl + o 保存文檔 重啟即可。
這個需要xinput
註：以下操作皆為SSH操作，所以每條指令前都加了DISPLAY=:0，如果本機操作刪掉即可。
sudo apt-get install xinput
xinput --list
如果遠程操作記得在命令前加DISPLAY=:0
得到以下信息：
pi@raspberrypi:~ $ xinput --list
?Virtual corepointer id=2 [masterpointer? (3)]
?Virtual core XTESTpointer id=4 [slave? pointer?(2)]
?Silicon WorksMulti-touch SW4101C id=6 [slave? pointer?(2)]
?Virtual corekeyboard id=3 [master keyboard (2)]
?Virtual core XTEST keyboard? id=5 [slave?keyboard (3)]
pi@raspberrypi:~ $
pi@raspberrypi:~ $ xinput --list-props 6
Device 'Silicon Works Multi-touch SW4101C':
? DeviceEnabled (114):? 1
? CoordinateTransformation Matrix (115):? 1.000000,0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
? libinputCalibration Matrix (246): -1.000000,0.000000, 1.000000, 0.000000, -1.000000, 1.000000, 0.000000, 0.000000, 1.000000
? libinputCalibration Matrix Default (247):? 1.000000,0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
? libinputSend Events Modes Available (248): 1,0
? libinputSend Events Mode Enabled (249): 0, 0
? libinputSend Events Mode Enabled Default (250):? 0,0
? DeviceNode (251):? "/dev/input/event0"
? DeviceProduct ID (252):? 10685, 16641
查看/usr/share/X11/xorg.conf.d/目錄下是否有40-libinput.conf這個文件。
無 則需要安裝
sudo apt-get installxserver-xorg-input-libinput
，
壹開始xorg.conf.d這個目錄在/etc/X11可能沒有，需要自己創建。
sudo mkdirxorg.conf.d
sudo cp/usr/share/X11/xorg.conf.d/40-libinput.conf /etc/X11/xorg.conf.d/
cd/etc/X11/xorg.conf.d/
sudo vim 40-libinput.conf
找到touchscreensection
Section"InputClass"
? Identifier "libinput touchscreencatchall"
? MatchIsTouchscreen "on"
? MatchDevicePath "/dev/input/event*"
? Driver "libinput"
EndSection
添加壹行?Option "CalibrationMatrix" "-1 0 1 0 -1 1 0 0 1“
結果為
Section"InputClass"
? Identifier "libinput touchscreencatchall"
? Option "CalibrationMatrix" " -1 0 1 0 -1 1 0 0 1“
? MatchIsTouchscreen "on"
? MatchDevicePath "/dev/input/event*"
? Driver "libinput"
EndSection
Complete the above steps to perform a 90degree rotation.
Note:
90 degree rotation :Option "CalibrationMatrix" "0 1 0 -1 0 1 0 0 1"
180 degree rotation :Option "CalibrationMatrix" "-1 0 1 0 -1 1 0 0 1"
270 degree rotation :Option "CalibrationMatrix" "0 -1 1 1 0 0 0 0 1"
pi@NTGAGE:~ $ DISPLAY=:0 xinput --list-props 7
Device 'WaveShare WaveShare Touchscreen':
Device Enabled (115): ? 1
Coordinate Transformation Matrix (116): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
Device Accel Profile (240): 0
Device Accel Constant Deceleration (241): ? 1.000000
Device Accel Adaptive Deceleration (242): ? 1.000000
Device Accel Velocity Scaling (243): 10.000000
Device Product ID (244): 3823, 5
Device Node (245): ?"/dev/input/event3"
Evdev Axis Inversion (246): 0, 0
Evdev Axis Calibration (247): ? <no items>
Evdev Axes Swap (248): ?0
Axis Labels (249): ?"Abs MT Position X" (267), "Abs MT Position Y" (268), "Abs MT Pressure" (269), "None" (0), "None" (0), "None" (0)
Button Labels (250): "Button Unknown" (233), "Button Unknown" (233), "Button Unknown" (233), "Button Wheel Up" (121), "Button Wheel Down" (122)
Evdev Scrolling Distance (251): 0, 0, 0
Evdev Middle Button Emulation (252): 0
Evdev Middle Button Timeout (253): ?50
Evdev Third Button Emulation (254): 0
Evdev Third Button Emulation Timeout (255): 1000
Evdev Third Button Emulation Button (256): ?3
Evdev Third Button Emulation Threshold (257): ? 20
Evdev Wheel Emulation (258): 0
Evdev Wheel Emulation Axes (259): ? 0, 0, 4, 5
Evdev Wheel Emulation Inertia (260): 10
Evdev Wheel Emulation Timeout (261): 200
Evdev Wheel Emulation Button (262): 4
Evdev Drag Lock Buttons (263): ?0
這塊屏幕正常顯示和觸摸的信息如上。
如果執行到這壹步，發現並沒有以上的Evdev等屬性項，請跳轉2.2。
現在需要達到的目的是在屏幕顯示反轉的同時，使得觸摸也隨顯示翻轉。
屏幕顯示為翻轉90度。/boot/config.txt設置為display_rotate=1
上述信息中Evdev Axis Inversion 項是每條軸的旋轉設置項，後面第壹個參數是x,第二個參數是y.
Evdev Axes Swap項對應的是兩條軸的交換。
0為不翻轉，1為翻轉?
例如。x軸原本是朝向右的，當把Evdev Axis Inversion的第壹個參數
設置為1，即x軸朝向左。
4.旋轉觸摸的坐標軸
現在目的是要觸摸旋轉90度，從坐標軸理解：
即目的x軸正向為初始y軸的反向。目的y軸的正方向為初始x軸的正向。
1）所以先交換x、y軸
DISPLAY=:0 xinput --set-prop '7' 'Evdev Axes Swap' 1
2）然後反轉y軸
DISPLAY=:0 xinput --set-prop '7' 'Evdev Axis Inversion' 0 1
這樣即可完成觸摸旋轉90度。若要旋轉其他角度，推理壹下即可。
顯示旋轉修改之後需要重啟。而觸摸旋轉不需要重啟。
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