creating kicad footprints using python scripts
Switch branches/tags
Clone or download
pointhi Merge pull request #176 from ppelleti/slide-pots
Generate Bourns PTA single-gang slide potentiometers
Latest commit fed9b0e Sep 15, 2018

README.md

This repository contains scripts to generate custom KiCAD footprints using python, and a framework which allows us to create custom KiCAD footprint. A big bunch of footprints of the KiCad library was developed using this framework.

KicadModTree

Licence: GNU GPLv3+

Maintainer: Thomas Pointhuber

Build Status Code Climate Documentation Status

Supports: Python 2.7 and 3.3+

About

I started drawing a bunch of similar footprints for KiCAD, like connectors which are mainly one base shape, and different amount of pins. To be able to update/improve those footprints quickly I decided to write my own footprint generator Framework, to allow simple creation of easy as well complex shapes.

This is my second approach (the first one can be found in the git history). This solution should be able to be easy to use, to read and also be easy to expand with custom nodes.

Overview

This framework is mainly based on the idea of scripted CAD systems (for example OpenSCAD). This means, everything is a node, and can be structured like a tree. In other words, you can group parts of the footprint, and translate them in any way you want. Also cloning & co. is no problem anymore because of this concept.

To be able to create custom Nodes, I separated the system in two parts. Base nodes, which represents simple structures and also be used by KiCAD itself, and specialized nodes which alter the behaviour of base nodes (for example positioning), or represent a specialized usage of base nodes (for example RectLine).

When you serialize your footprint, the serialize command only has to handle base nodes, because all other nodes are based upon the base nodes. This allows us to write specialized nodes without worrying about the FileHandlers or other core systems. You simply create your special node, and the framework knows how to handle it seamlessly.

Please look into the Documentation for further details

KicadModTree        - The KicadModTree framework which is used for footprint generation
docs                - Files required to generate a sphinx documentation
scripts             - scripts which are generating footprints based on this library

Development

Install development Dependencies

manage.sh update_dev_packages

run tests

manage.sh tests

Example Script

from KicadModTree import *

footprint_name = "example_footprint"

# init kicad footprint
kicad_mod = Footprint(footprint_name)
kicad_mod.setDescription("A example footprint")
kicad_mod.setTags("example")

# set general values
kicad_mod.append(Text(type='reference', text='REF**', at=[0, -3], layer='F.SilkS'))
kicad_mod.append(Text(type='value', text=footprint_name, at=[1.5, 3], layer='F.Fab'))

# create silscreen
kicad_mod.append(RectLine(start=[-2, -2], end=[5, 2], layer='F.SilkS'))

# create courtyard
kicad_mod.append(RectLine(start=[-2.25, -2.25], end=[5.25, 2.25], layer='F.CrtYd'))

# create pads
kicad_mod.append(Pad(number=1, type=Pad.TYPE_THT, shape=Pad.SHAPE_RECT,
                     at=[0, 0], size=[2, 2], drill=1.2, layers=Pad.LAYERS_THT))
kicad_mod.append(Pad(number=2, type=Pad.TYPE_THT, shape=Pad.SHAPE_CIRCLE,
                     at=[3, 0], size=[2, 2], drill=1.2, layers=Pad.LAYERS_THT))

# add model
kicad_mod.append(Model(filename="example.3dshapes/example_footprint.wrl",
                       at=[0, 0, 0], scale=[1, 1, 1], rotate=[0, 0, 0]))

# output kicad model
file_handler = KicadFileHandler(kicad_mod)
file_handler.writeFile('example_footprint.kicad_mod')