我正在尝试找到一种通过hdmi上的智能电视遥控器控制树莓派的方法。
除了一件事，其他所有东西都可以完美运行。
当我按遥控器上的一个键时，该动作将执行两次。
示例：
我已经设置：当我按电视遥控器上的暂停键时，我的raspberrypi终端显示
按键：暂停
但实际上，它显示了2次
按键：暂停
如何避免这种情况？
这是my code的脚本。
#!/bin/bash
function keychar {
parin1=$1 #first param; abc1
parin2=$2 #second param; 0=a, 1=b, 2=c, 3=1, 4=a, ...
parin2=$((parin2)) #convert to numeric
parin1len=${#parin1} #length of parin1
parin2pos=$((parin2 % parin1len)) #position mod
char=${parin1:parin2pos:1} #char key to simulate
if [ "$parin2" -gt 0 ]; then #if same key pressed multiple times, delete previous char; write a, delete a write b, delete b write c, ...
xdotool key "BackSpace"
fi
#special cases for xdotool ( X Keysyms )
if [ "$char" = " " ]; then char="space"; fi
if [ "$char" = "." ]; then char="period"; fi
if [ "$char" = "-" ]; then char="minus"; fi
xdotool key $char
}
datlastkey=$(date +%s%N)
strlastkey=""
intkeychar=0
intmsbetweenkeys=2000 #two presses of a key sooner that this makes it delete previous key and write the next one (a->b->c->1->a->...)
intmousestartspeed=10 #mouse starts moving at this speed (pixels per key press)
intmouseacc=10 #added to the mouse speed for each key press (while holding down key, more key presses are sent from the remote)
intmousespeed=10
while read oneline
do
keyline=$(echo $oneline | grep " key ")
#echo $keyline --- debugAllLines
if [ -n "$keyline" ]; then
datnow=$(date +%s%N)
datdiff=$((($datnow - $datlastkey) / 1000000)) #bla bla key pressed: previous channel (123)
strkey=$(grep -oP '(?<=sed: ).*?(?= \()' <<< "$keyline") #bla bla key pres-->sed: >>previous channel<< (<--123)
strstat=$(grep -oP '(?<=key ).*?(?=:)' <<< "$keyline") #bla bla -->key >>pressed<<:<-- previous channel (123)
strpressed=$(echo $strstat | grep "pressed")
strreleased=$(echo $strstat | grep "released")
if [ -n "$strpressed" ]; then
#echo $keyline --- debug
if [ "$strkey" = "$strlastkey" ] && [ "$datdiff" -lt "$intmsbetweenkeys" ]; then
intkeychar=$((intkeychar + 1)) #same key pressed for a different char
else
intkeychar=0 #different key / too far apart
fi
datlastkey=$datnow
strlastkey=$strkey
case "$strkey" in
"1")
xdotool key "BackSpace"
;;
"2")
keychar "abc2" intkeychar
;;
"3")
keychar "def3" intkeychar
;;
"4")
keychar "ghi4" intkeychar
;;
"5")
keychar "jkl5" intkeychar
;;
"6")
keychar "mno6" intkeychar
;;
"7")
keychar "pqrs7" intkeychar
;;
"8")
keychar "tuv8" intkeychar
;;
"9")
keychar "wxyz9" intkeychar
;;
"0")
keychar " 0.-" intkeychar
;;
"previous channel")
xdotool key "Return" #Enter
;;
"channel up")
xdotool click 4 #mouse scroll up
;;
"channel down")
xdotool click 5 #mouse scroll down
;;
"channels list")
xdotool click 3 #right mouse button click"
;;
"up")
xdotool key "Up"
;;
"down")
xdotool key "Down"
;;
"left")
xdotool key "Left"
;;
"right")
xdotool key "Right"
;;
"select")
xdotool key "Ctrl+a" #left mouse button click
;;
"return")
xdotool key "Alt_L+Left" #WWW-Back
;;
"exit")
echo Key Pressed: EXIT
;;
"F2")
chromium-browser "https://www.youtube.com" &
;;
"F3")
chromium-browser "https://www.google.com" &
;;
"F4")
echo Key Pressed: YELLOW C
;;
"F1")
chromium-browser --incognito "https://www.google.com" &
;;
"rewind")
echo Key Pressed: REWIND
;;
"pause")
echo Key Pressed: PAUSE
;;
"Fast forward")
echo Key Pressed: FAST FORWARD
;;
"play")
echo Key Pressed: PLAY
;;
"stop")
## with my remote I only got "STOP" as key released (auto-released), not as key pressed; see below
echo Key Pressed: STOP
;;
*)
echo Unrecognized Key Pressed: $strkey ; CEC Line: $keyline
;;
esac
fi
if [ -n "$strreleased" ]; then
#echo $keyline --- debug
case "$strkey" in
"stop")
echo Key Released: STOP
;;
"up")
intmousespeed=$intmousestartspeed #reset mouse speed
;;
"down")
intmousespeed=$intmousestartspeed #reset mouse speed
;;
"left")
intmousespeed=$intmousestartspeed #reset mouse speed
;;
"right")
intmousespeed=$intmousestartspeed #reset mouse speed
;;
esac
fi
fi
done
谢谢， （对不起，英语，这不是我的母语）