documentclass[12pt]{article}

usepackage
[
  top=0.7in,
  bottom=1.2in,
  left=0.8in,
  right=0.8in
]{geometry}

usepackage{parskip}

setlength{parindent}{0cm}

usepackage[fleqn]{amsmath}

usepackage{unicode-math}

usepackage{fontspec}

usepackage[english,greek]{babel}

setmainfont
[
  Ligatures=TeX,
  Extension=.otf,
  UprightFont=*,
  BoldFont=*Bold,
  ItalicFont=*It,
  BoldItalicFont=*BoldIt,
  Mapping=tex-text
]{GFSArtemisia}

setsansfont[Mapping=tex-text]{GFSArtemisia.otf}

setmathfont{latinmodern-math.otf}
setmathfont[range=varnothing]{Asana-Math.otf}
setmathfont[range=int]{latinmodern-math.otf}

usepackage{listings}

usepackage[usenames,dvipsnames,svgnames,table]{xcolor}

newcommand{en}[1]{foreignlanguage{english}{#1}}

newcommand{comment}[1]{}

begin{document}

Text Here

begin{lstlisting}

Code Here

end{lstlisting}

end{document}

No file MSP430.aux.

(/usr/share/texmf/tex/latex/tipa/t3cmr.fd)

*geometry* driver: auto-detecting
*geometry* detected driver: xetex

ABD: EveryShipout initializing macros

newcommand*{@EveryShipout@Init}{%
   message{ABD: EveryShipout initializing macros}%
   let@EveryShipout@Org@Shipoutshipout
   letshipout@EveryShipout@Shipout
   }
AtBeginDocument{@EveryShipout@Init}

(/usr/share/texlive/texmf-dist/tex/latex/listings/lstlang1.sty)
(/usr/share/texlive/texmf-dist/tex/latex/listings/lstmisc.sty)

(/usr/share/texlive/texmf-dist/tex/latex/euenc/eu1lmtt.fd) [1] (./MSP430.aux) )

usepackage[EU1]{fontenc}
usepackage{lmodern}

Output written on MSP430.pdf (1 page).

Transcript written on MSP430.log.