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Emacs measurement code for input latency measurements
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The following instructions were tested on Ubuntu 17.10.

  • Install Emacs 25.2.2 using sudo apt install emacs

  • Start Emacs and run M-x package-install xelb.

  • Restart Emacs now (otherwise, you will run into an eieio error).

  • Open measure.el, evaluate all expressions but the last one. Copy the last expression into the scratch buffer and evaluate it there.

  • Plug in the FRDM-K66F, then remap Caps Lock to any key (e.g. “n”): xmodmap -e 'keycode 66 = n N'

  • Take measurements.

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