How do I make a time gap in LaTeX using tikz-timing?

Question

Is there a way to make a timing gap using the tikz-timing package or tikz, like the timing gap highlighted in the picture below?

Answer 1

(Because I was a bit bored:) Note, there are bound to be several other ways of doing the same thing, and likely better ways. I define a style for a node, and draw the gap symbol as a path picture. The placement will depend on your diagram. In this case note the timing specification (2L N(A1) 4H N(A2) L) includes two named nodes A1 and A2, and the gap node is placed using those as a reference.

\documentclass[border=5mm]{standalone}
\usepackage{tikz-timing}
\usetikzlibrary{calc}

\tikzset{
  alias path picture bounding box/.code=%https://tex.stackexchange.com/q/395628
    \pgfnodealias{#1}{path picture bounding box},
  gap/.style={
    circle,
    inner sep=0pt,
    minimum size=#1,
    node contents={},
    path picture={
       \tikzset{alias path picture bounding box=@}
       \fill [white] (@.265) to[out=40,in=220] (@.70) -- 
                     (@.85)  to[out=220,in=40] (@.250) -- cycle;
       \draw [very thin] (@.265) to[out=40,in=220] (@.70)
                         (@.85)  to[out=220,in=40] (@.250);
    }
  },
  gap/.default=10pt
}
\begin{document}
\begin{tikztimingtable}
    foo & 2L N(A1)  4H N(A2) L\\
    \extracode
    \node[gap, at={($(A1|-A2)!0.5!(A2)$)}];
\end{tikztimingtable}
\end{document}