Added NanoVNA driver documentation.

Added DTR flag to uart transport documentation.

Author: Frederic Borry

section-transports.tex

@@ -89,14 +89,22 @@ \section{uart}
 
 SCPI over RS-232 or USB-UART.
 
-This transport takes two arguments: device path (required) and baud rate (optional). If baud rate is not specified, it
+This transport takes 3 arguments: device path (required), baud rate (optional) and flags (optional). If baud rate is not specified, it
 defaults to 115200.
 
 Example:
 \begin{lstlisting}[language=sh, numbers=none]
 ngscopeclient myscope:rigol:uart:/dev/ttyUSB0:115200
 \end{lstlisting}
 
+Some devices, like the NanoVNA, need to activate the DTR line to communicate. This can be achieved by adding the DTR flag to the connection string.
+
+Example:
+\begin{lstlisting}[language=sh, numbers=none]
+ngscopeclient NanoVNA-F:nanovna:uart:COM6:115200:DTR
+\end{lstlisting}
+
+
 \section{usbtmc}
 
 SCPI over USB Test \& Measurement Class protocol.

section-vna-drivers.tex

@@ -34,6 +34,43 @@ \subsection{coppermt}
 As of this writing, only 2-port VNAs are supported. 4-port VNAs will probably work using only the first two ports,
 but this has not been tested.
 
+\section{NanoVNA}
+
+\begin{tabularx}{16cm}{lllX}
+\thickhline
+\textbf{Device Family} & \textbf{Driver} & \textbf{Transport} & \textbf{Notes} \\
+\thickhline
+NanoVNA & nanovna & uart & Not tested but should work\\
+\thinhline
+NanoVNA-D & nanovna & uart & Not tested but should work\\
+\thinhline
+NanoVNA-F & nanovna & uart & Not tested but should work\\
+\thinhline
+DeepVNA 101 & nanovna & uart & Development and tests made on this device (a.k.a. NanoVNA-F Deepelec)\\
+\thinhline
+NanoVNA-F\_V2 & nanovna & uart & Not tested but should work\\
+\thinhline
+NanoVNA-H & nanovna & uart & Not tested but should work\\
+\thinhline
+NanoVNA-H4 & nanovna & uart & Not tested but should work\\
+\thickhline
+\end{tabularx}
+
+\subsection{nanovna}
+
+This driver supports the NanoVNA with different variants of the original design and firmware (see above).
+
+Communication with the device uses UART transport layer with a connection string looking like this (DTR flag is required):
+\begin{lstlisting}[language=sh, numbers=none]
+COM6:115200:DTR
+\end{lstlisting}
+
+Paginated sweep has been implemented to achieve memory depths greater then the device's internal limit.
+
+Pagination is also used at low RBW to prevent the connection from timing out during sweep.
+
+NanoVNA V2 (with binary protocol) is NOT supported.
+
 \section{Pico Technology}
 
 \begin{tabularx}{16cm}{lllX}