Table of Contents

High Speed Serial Signals

A (horrific) script which generates examples of serial signals with options to distort and encode the messages. Relies on eightbtenb.py, an equally horrific and known incorrect 8b10b encoder/decoder implementation (good enough for figures...).

Usage

Arguments

python serial_comms.py [Label] [ASCII Message] [show decoding] [noise sigma] [just show noise] [negate signal] [8b10b encode] [horizontal scaling] [brace size]

Simple Serial Signal

\begin{tikzpicture}
    \input{|"python serial_comms.py 'Basic' 'Hello, World!' 1 0 0 0 0 0.4 0.2"}
\end{tikzpicture}

Signal + Noise = Corrupt Signal

\begin{tikzpicture}
    \begin{scope}[yshift=-0cm]
        \input{|"python src/serial_comms.py      'Signal' 'Hello, World!' 0 0.0 0 0 0 0.4 0.2"}
    \end{scope}
    \begin{scope}[yshift=-1cm]
        \input{|"python src/serial_comms.py     '+ Noise' 'Hello, World!' 0 0.2 1 0 0 0.4 0.2"}
    \end{scope}
    \begin{scope}[yshift=-2cm]
        \input{|"python src/serial_comms.py '= Corrupted' 'Hello, World!' 1 0.2 0 0 0 0.4 0.2"}
    \end{scope}
\end{tikzpicture}

Differential Signalling

\begin{tikzpicture}
    \begin{scope}[yshift=-0cm]
        \input{|"python serial_comms.py         'Noise' 'Hello, World!' 0 0.2 1 0 0 0.4 0.2"}
    \end{scope}
    \begin{scope}[yshift=-1cm]
        \input{|"python serial_comms.py      '+ Signal' 'Hello, World!' 0 0.2 0 0 0 0.4 0.2"}
    \end{scope}
    \begin{scope}[yshift=-2cm]
        \input{|"python serial_comms.py      '- Signal' 'Hello, World!' 0 0.2 0 1 0 0.4 0.2"}
    \end{scope}
    \begin{scope}[yshift=-3cm]
        \input{|"python serial_comms.py    'Difference' 'Hello, World!' 1 0.0 0 0 0 0.4 0.2"}
    \end{scope}
\end{tikzpicture}

8b/10b Encoding

\begin{tikzpicture}
    \begin{scope}[yshift=-0cm]
        \input{|"python serial_comms.py    'Raw' '@@@@' 1 0.0 0 0 0 0.8 0.2"}
    \end{scope}
    \begin{scope}[yshift=-2cm]
        \input{|"python serial_comms.py '8b/10b' '@@@@' 1 0.0 0 0 1 0.8 0.2"}
    \end{scope}
\end{tikzpicture}