View source for Raspberry Pi Pikeyd165 keylogging

[[Category:Video Games]]

I ran in to a few issues where ghost button presses were happing on my [[Neo Geo Arcade Cabinet]] so resorted to debugging with a the [https://github.com/kernc/logkeys logkeys] keylogger. Here's how to install it on a Rapsberry pi and debug the pikeyd165 driver (binary can be found in [http://strike-devices.net/index.php/download/ the Retropie or Regamebox packages] for [http://strike-devices.net/index.php/pi2jamma/ pi2jamma]):


Install required packages to build logkeys. You may already have some of these installed:
 sudo apt-get install autoconf automake libtool autotools-dev git



Download and compile logkeys. If the autogen.sh command gives an error I may have missed a package above.
 git clone https://github.com/kernc/logkeys.git
 cd logkeys
 ./autogen.sh
 cd build
 ../configure
 make
 sudo make install



Now you must determine which input device pikeyd165 is showing up as, this will depend on if you have a keyboard and some other things. Look at the file '''/proc/bus/input/devices''' and find the event handler named "uinput-sample". Mine is '''event4''':
 less /proc/bus/input/devices
 
 <snip removed the real keyboard stuff>
 
 I: Bus=0003 Vendor=0001 Product=0001 Version=0001
 N: Name="uinput-sample"
 P: Phys=
 S: Sysfs=/devices/virtual/input/input4
 U: Uniq=
 H: Handlers=sysrq kbd event4 rfkill 
 B: PROP=0
 B: EV=100003
 B: KEY=ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffffe



SSH in to the pi and start logkeys. Be sure to modify '''event4''' to whatever yours is:
 sudo logkeys --start --device /dev/input/event4 --output /var/log/logkeys.log



All output from pikeyd165 should now be logged to '''/var/log/logkeys.log'''. Press some joystick directions to ensure it's logging. Launch a game and let it idle for a while. 


In my case it was sensing random ghost inputs of all buttons mapped in pikeyd165.conf. sometimes it took a few minutes,to sometime it took 15 minutes or so, it's random. Note that the log shows a few oddities due to the shift key being virtually pressed. ! is 1, " is 2, % is 5, ^ is 6.

 <F2><Esc> <LShft>ZXIKWQ<Left><Right><LCtrl><LAlt>SAGd%!<Up><Down>FR"^


I'm currently working to determine what is actually causing this. It doesn't seem to happen while idling at the input menu, only while in a game. It happens in both Advmame as well as libretro FBA. Advmame sees the F2 and Escape and acts accordingly - escapes the game or goes to VTY2. Libretro seems to ignore everything, perhaps due to it being 24 characters at once.