Query/create active layer in pcbnew scripting API

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1

I’m trying to write a script to load any number of .csv files containing x/y coordinates and draw the tracks on a different layer.

I’m having trouble sorting through the docs. Right now my scripts just default to F.Cu but if possible I’d like it to be able create a copper layer for each imported file.

I would like the code below to create a layer based on fname rather that F.Cu

import pcbnew
import csv
import glob

fout = 'shim-coil.kicad_pcb'
board = pcbnew.BOARD()

def add_track(ri, rf, width):
    k = 25400   # convert mils to namometers
    track = pcbnew.TRACK(board)
    track.SetStart(pcbnew.wxPoint(k*ri[0], k*ri[1]))
    track.SetEnd(pcbnew.wxPoint(k*rf[0], k*rf[1]))
    track.SetWidth(int(width*k))
    board.Add(track)


def load_pts(fname):
    """load trace coordaintes from .tsv file"""
    PTS = []
    print('Loading "' + fname + '" ...')
    with open(fname,'r') as csvfile:
        lines = csv.reader(csvfile, delimiter='\t')
        for line in lines:
            pts = [float(x) for x in line]
            PTS.append(pts)
    return(PTS)

# Import Tracks
files = glob.glob('./*.tsv')
for fname in files:
    PTS = load_pts(fname)
    for i in range(0,len(PTS)-1):
        add_track(PTS[i], PTS[i+1], 10)

board.Save(fout)
print('Exported "' + fout + '" !')
2

Use the SetLayer method available for tracks. You can use pcbnew layer definitions (pcbnew.F_Cu, pcbnew.In1_Cu, … , pcbnew.B_Cu)

3

any suggestions how to programatically query available layers or better yet ,create new layers so that I can iterate through them?

4

I don’t have slightest clue. Sorry

5

That’s fine, it seems that the layers are already present, they just need to be activated in pcbnew upon opening the editor.

6

You don’t really “create new layers”, board file stores list of enabled layers.

BOARD object has SetEnabledLayers()

You can use them like this

board = pcbnew.BOARD()
s = board.GetEnabledLayers()
print(list(s.Seq()))
s.AddLayer(pcbnew.In4_Cu)
board.SetEnabledLayers(s)
print(list(s.Seq()))

This prints

[0, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50]
[0, 4, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50]

These IDs correspond to this enum

7

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