KICAD xml Netlist parser for Testpoint connectivity

- Description

This script has been developped following a request by user 'xzf16' on the Kicad forum.
The purpose of this script is to check if every net have a testpoint connected to it.

Two versions exist :

• one as a standalone script called netlist_tp_parser.py
• one as a Kicad plugin called testpoint_connectivity.py

- Environnement

• Python >=3.6 for standalone version
• Kicad 6.x for plugin version
• No specific Python module

- Stand alone version

-- usage

Execute the script with Python and by passing the netlist file in xml format as argument.

> python netlist_tp_parser.py

usage: netlist_tp_parser.py [-h] [--prefix component_prefix] netlist_file.xml

The argument --prefix may be used to specify the component reference prefix.
If not specified, the default prefix is TP like Test Point.

> python3 netlist_tp_parser.py part_net_relation.xml
Component reference prefix to check: TP
Processing, please wait ...

================= Summary ======================
                  Total TestPoint : 6
                       Total Nets : 8
             Total connected Nets : 6
                 Unconnected Nets : 2
    Connected Nets with TestPoint : 5
 Connected Nets without TestPoint : 1
               TestPoint coverage : 83.3%

====== Connected Nets without TestPoint ========
Net-(J1-Pad4)

========= 1 TestPoint connected Nets ===========
Net-(J1-Pad1) : TP1
Net-(J1-Pad2) : TP2
Net-(J1-Pad5) : TP4
Net-(J1-Pad6) : TP5

===== More than 1 TestPoint connected Nets =====
Net-(J1-Pad3) : TP3, TP6

=============== Unconnected Nets ===============
unconnected-(J3-Pad1)
unconnected-(J3-Pad2)

- Kicad plugin version

-- Installation

To install the plugin script, copy the file testpoint_connectivity.py in the Kicad Plugin folder located at the following path C:\Users\[Username]\Documents\KiCad\6.0\plugins.
In the Schematics editor, open the "Bill of material" window by either going to "Tools" -> "Generate Bill of Materials" or by clicking the "BOM" icon on the tools bar, then press the "+" button at the bottom of the screen and choose the plugin file you have just copied.
When asked for the nickname, go with the default, the "Bill of material" window

-- Usage

In the "Bill of material" window, click on testpoint_connectivity in the BOM generators scripts list and click on the Generate button.
A printout with the summary results will be displayed on right panel of the widow
At the same time, the summary results will be written in a text file ([project_name].txt) created in your project folder.

Note that the script find the testpoints in the netlist by identifying a pattern at the beginning of their reference.
If for any reason you need to change the testpoint reference prefix, you can edit the script testpoint_connectivity and change the content of the prefix variable.

prefix = "TP"

- Versions

Last version: https://github.com/Peboli/kicad_netlist_tp_parser

- Author

Olivier Cornet aka Peboli on Github

- License

This script is MIT licensed