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#!/usr/bin/env python3
import math
import itertools
import datetime
import tempfile
import subprocess
import gerbonara.cad.kicad.pcb as pcb
import gerbonara.cad.kicad.footprints as fp
import gerbonara.cad.primitives as cad_pr
import gerbonara.cad.kicad.graphical_primitives as kc_gr
cols = 6
rows = 4
coil_specs = [
{'n': 1, 's': True, 't': 1, 'c': 0.20, 'w': 5.00, 'v': 0.40},
{'n': 2, 's': True, 't': 1, 'c': 0.20, 'w': 3.00, 'v': 0.40},
{'n': 3, 's': True, 't': 1, 'c': 0.20, 'w': 1.50, 'v': 0.40},
{'n': 5, 's': True, 't': 1, 'c': 0.20, 'w': 0.80, 'v': 0.40},
{'n': 10, 's': True, 't': 1, 'c': 0.20, 'w': 0.50, 'v': 0.40},
{'n': 25, 's': True, 't': 1, 'c': 0.15, 'w': 0.25, 'v': 0.40},
{'n': 1, 's': False, 't': 1, 'c': 0.20, 'w': 5.00, 'v': 0.40},
{'n': 2, 's': False, 't': 1, 'c': 0.20, 'w': 3.00, 'v': 0.40},
{'n': 3, 's': False, 't': 1, 'c': 0.20, 'w': 1.50, 'v': 0.40},
{'n': 5, 's': False, 't': 1, 'c': 0.20, 'w': 0.80, 'v': 0.40},
{'n': 10, 's': False, 't': 1, 'c': 0.20, 'w': 0.50, 'v': 0.40},
{'n': 25, 's': False, 't': 1, 'c': 0.15, 'w': 0.25, 'v': 0.40},
{'n': 1, 's': False, 't': 2, 'c': 0.20, 'w': 5.00, 'v': 0.40},
{'n': 2, 's': False, 't': 3, 'c': 0.20, 'w': 3.00, 'v': 0.40},
{'n': 3, 's': False, 't': 2, 'c': 0.20, 'w': 1.50, 'v': 0.40},
{'n': 5, 's': False, 't': 2, 'c': 0.20, 'w': 0.80, 'v': 0.40},
{'n': 10, 's': False, 't': 3, 'c': 0.20, 'w': 0.50, 'v': 0.40},
{'n': 25, 's': False, 't': 2, 'c': 0.15, 'w': 0.25, 'v': 0.40},
{'n': 1, 's': False, 't': 3, 'c': 0.20, 'w': 5.00, 'v': 0.40},
{'n': 2, 's': False, 't': 5, 'c': 0.20, 'w': 3.00, 'v': 0.40},
{'n': 3, 's': False, 't': 4, 'c': 0.20, 'w': 1.50, 'v': 0.40},
{'n': 5, 's': False, 't': 3, 'c': 0.20, 'w': 0.80, 'v': 0.40},
{'n': 10, 's': False, 't': 7, 'c': 0.20, 'w': 0.50, 'v': 0.40},
{'n': 25, 's': False, 't': 7, 'c': 0.15, 'w': 0.25, 'v': 0.40},
]
version_string = 'v1.0'
coil_border = 7 # mm
cut_gap = 3 # mm
tooling_border = 10 # mm
vscore_extra = 10 # mm
mouse_bite_width = 8 # mm
mouse_bite_hole_dia = 0.5
mouse_bite_hole_spacing = 0.3
hole_offset = 5
hole_dia = 3.2
coil_dia = 35 # mm
pad_offset = 2 # mm
pad_dia = 2.0 # mm
pad_length = 3.5 # mm
pad_drill = 1.1 # mm
pad_pitch = 2.54 # mm
v_cuts = False # FIXME DEBUG
mouse_bites = False # FIXME DEBUG
coil_pitch = coil_dia + coil_border*2 + cut_gap
total_width = coil_pitch*cols + 2*tooling_border + cut_gap
total_height = coil_pitch*rows + 2*tooling_border + cut_gap
tile_width = tile_height = coil_dia + 2*coil_border
drawing_text_size = 2.0
print(f'Calculated board size: {total_width:.2f} * {total_height:.2f} mm')
print(f'Tile size: {tile_height:.2f} * {tile_height:.2f} mm')
x0, y0 = 100, 100
xy = pcb.XYCoord
b = pcb.Board.empty_board(page=pcb.PageSettings(page_format='A2'))
b.add(kc_gr.Rectangle(xy(x0, y0), xy(x0+total_width, y0+total_height), layer='Edge.Cuts', stroke=pcb.Stroke(width=0.15)))
def do_line(x0, y0, x1, y1, off_x=0, off_y=0):
b.add(kc_gr.Line(xy(x0+off_x, y0+off_y),
xy(x1+off_x, y1+off_y),
layer='Edge.Cuts', stroke=pcb.Stroke(width=0.15)))
if v_cuts:
for y in range(rows):
for off_y in [0, tile_height]:
y_pos = y0 + tooling_border + cut_gap + off_y + y*coil_pitch
do_line(x0 - vscore_extra, y_pos, x0 + total_width + vscore_extra, y_pos)
b.add(kc_gr.Text(text='V-score',
at=pcb.AtPos(x0 + total_width + vscore_extra + drawing_text_size/2, y_pos, 0),
layer=kc_gr.TextLayer('Edge.Cuts'),
effects=pcb.TextEffect(
font=pcb.FontSpec(size=xy(drawing_text_size, drawing_text_size),
thickness=drawing_text_size/10),
justify=pcb.Justify(h=pcb.Atom.left))))
for x in range(cols):
for off_x in [0, tile_width]:
x_pos = x0 + tooling_border + cut_gap + off_x + x*coil_pitch
do_line(x_pos, y0 - vscore_extra, x_pos, y0 + total_height + vscore_extra)
b.add(kc_gr.Text(text='V-score',
at=pcb.AtPos(x_pos, y0 + total_height + vscore_extra + drawing_text_size/2, 90),
layer=kc_gr.TextLayer('Edge.Cuts'),
effects=pcb.TextEffect(
font=pcb.FontSpec(size=xy(drawing_text_size, drawing_text_size),
thickness=drawing_text_size/10),
justify=pcb.Justify(h=pcb.Atom.right))))
def draw_corner(x0, y0, spokes):
right, top, left, bottom = [True if c.lower() in 'y1' else False for c in spokes]
l = (tile_width - mouse_bite_width)/2 - cut_gap/2
if right:
do_line(cut_gap/2, -cut_gap/2, cut_gap/2 + l, -cut_gap/2, x0, y0)
do_line(cut_gap/2, cut_gap/2, cut_gap/2 + l, cut_gap/2, x0, y0)
b.add(kc_gr.Arc(start=xy(x0+cut_gap/2+l, y0-cut_gap/2),
end=xy(x0+cut_gap/2+l, y0+cut_gap/2),
center=xy(x0+cut_gap/2+l, y0),
layer='Edge.Cuts',
stroke=pcb.Stroke(width=0.15)))
else:
do_line(cut_gap/2, -cut_gap/2, cut_gap/2, cut_gap/2, x0, y0)
if left:
do_line(-cut_gap/2, -cut_gap/2, -cut_gap/2 - l, -cut_gap/2, x0, y0)
do_line(-cut_gap/2, cut_gap/2, -cut_gap/2 - l, cut_gap/2, x0, y0)
b.add(kc_gr.Arc(end=xy(x0-cut_gap/2-l, y0-cut_gap/2),
start=xy(x0-cut_gap/2-l, y0+cut_gap/2),
center=xy(x0-cut_gap/2-l, y0),
layer='Edge.Cuts',
stroke=pcb.Stroke(width=0.15)))
else:
do_line(-cut_gap/2, -cut_gap/2, -cut_gap/2, cut_gap/2, x0, y0)
if bottom:
do_line(-cut_gap/2, cut_gap/2, -cut_gap/2, cut_gap/2 + l, x0, y0)
do_line(cut_gap/2, cut_gap/2, cut_gap/2, cut_gap/2 + l, x0, y0)
b.add(kc_gr.Arc(end=xy(x0-cut_gap/2, y0+cut_gap/2+l),
start=xy(x0+cut_gap/2, y0+cut_gap/2+l),
center=xy(x0, y0+cut_gap/2+l),
layer='Edge.Cuts',
stroke=pcb.Stroke(width=0.15)))
else:
do_line(-cut_gap/2, cut_gap/2, cut_gap/2, cut_gap/2, x0, y0)
if top:
do_line(-cut_gap/2, -cut_gap/2, -cut_gap/2, -cut_gap/2 - l, x0, y0)
do_line(cut_gap/2, -cut_gap/2, cut_gap/2, -cut_gap/2 - l, x0, y0)
b.add(kc_gr.Arc(start=xy(x0-cut_gap/2, y0-cut_gap/2-l),
end=xy(x0+cut_gap/2, y0-cut_gap/2-l),
center=xy(x0, y0-cut_gap/2-l),
layer='Edge.Cuts',
stroke=pcb.Stroke(width=0.15)))
else:
do_line(-cut_gap/2, -cut_gap/2, cut_gap/2, -cut_gap/2, x0, y0)
def make_mouse_bite(x, y, rot=0, width=mouse_bite_width, hole_dia=mouse_bite_hole_dia, hole_spacing=mouse_bite_hole_spacing, **kwargs):
pitch = hole_dia + hole_spacing
num_holes = int(math.floor((width - hole_spacing) / pitch))
actual_spacing = (width - num_holes*hole_dia) / (num_holes + 1)
f = fp.Footprint(name='mouse_bite', _version=None, generator=None, at=fp.AtPos(x, y, rot), **kwargs)
for i in range(num_holes):
f.pads.append(fp.Pad(
number='1',
type=fp.Atom.np_thru_hole,
shape=fp.Atom.circle,
at=fp.AtPos(-width/2 + actual_spacing + i*pitch + hole_dia/2, 0, 0),
size=xy(hole_dia, hole_dia),
drill=fp.Drill(diameter=hole_dia),
footprint=f))
return f
def make_hole(x, y, dia, **kwargs):
f = fp.Footprint(name='hole', _version=None, generator=None, at=fp.AtPos(x, y, 0), **kwargs)
f.pads.append(fp.Pad(
number='1',
type=fp.Atom.np_thru_hole,
shape=fp.Atom.circle,
at=fp.AtPos(0, 0, 0),
size=xy(dia, dia),
drill=fp.Drill(diameter=dia),
footprint=f))
return f
def make_pads(x, y, rot, n, pad_dia, pad_length, drill, pitch, **kwargs):
f = fp.Footprint(name=f'conn_gen_01x{n}', _version=None, generator=None, at=fp.AtPos(x, y, rot), **kwargs)
for i in range(n):
f.pads.append(fp.Pad(
number=str(i+1),
type=fp.Atom.thru_hole,
shape=fp.Atom.oval,
at=fp.AtPos(-pitch*(n-1)/2 + i*pitch, 0, rot),
size=xy(pad_dia, pad_length),
drill=fp.Drill(diameter=drill),
footprint=f))
return f
corner_x0 = x0 + tooling_border + cut_gap/2
corner_y0 = y0 + tooling_border + cut_gap/2
corner_x1 = x0 + total_width - tooling_border - cut_gap/2
corner_y1 = y0 + total_height - tooling_border - cut_gap/2
# Corners
draw_corner(corner_x0, corner_y0, 'YNNY')
draw_corner(corner_x0, corner_y1, 'YYNN')
draw_corner(corner_x1, corner_y0, 'NNYY')
draw_corner(corner_x1, corner_y1, 'NYYN')
# T junctions
for x in range(1, cols):
draw_corner(corner_x0 + x*coil_pitch, corner_y0, 'YNYY')
draw_corner(corner_x0 + x*coil_pitch, corner_y1, 'YYYN')
for y in range(1, rows):
draw_corner(corner_x0, corner_y0 + y*coil_pitch, 'YYNY')
draw_corner(corner_x1, corner_y0 + y*coil_pitch, 'NYYY')
# X Junctions
for x in range(1, cols):
for y in range(1, rows):
draw_corner(corner_x0 + x*coil_pitch, corner_y0 + y*coil_pitch, 'YYYY')
# Mouse bites
if mouse_bites:
for x in range(0, cols):
for y in range(0, rows):
tile_x0 = x0 + tooling_border + cut_gap + x*coil_pitch
tile_y0 = y0 + tooling_border + cut_gap + y*coil_pitch
b.add(make_mouse_bite(tile_x0 + tile_width/2, tile_y0, 0))
b.add(make_mouse_bite(tile_x0 + tile_width/2, tile_y0 + tile_height, 0))
b.add(make_mouse_bite(tile_x0, tile_y0 + tile_height/2, 90))
b.add(make_mouse_bite(tile_x0 + tile_width, tile_y0 + tile_height/2, 90))
# Mounting holes
for x in range(0, cols):
for y in range(0, rows):
tile_x0 = x0 + tooling_border + cut_gap + x*coil_pitch + tile_width/2
tile_y0 = y0 + tooling_border + cut_gap + y*coil_pitch + tile_height/2
dx = tile_width/2 - hole_offset
dy = tile_height/2 - hole_offset
b.add(make_hole(tile_x0 - dx, tile_y0 - dy, hole_dia))
b.add(make_hole(tile_x0 - dx, tile_y0 + dy, hole_dia))
b.add(make_hole(tile_x0 + dx, tile_y0 - dy, hole_dia))
b.add(make_hole(tile_x0 + dx, tile_y0 + dy, hole_dia))
# border graphics
c = 3
for layer in ['F.SilkS', 'B.SilkS']:
b.add(kc_gr.Rectangle(start=xy(x0, y0), end=xy(x0+c, y0+total_height), layer=layer, stroke=pcb.Stroke(width=0),
fill=kc_gr.FillMode(pcb.Atom.solid)))
b.add(kc_gr.Rectangle(start=xy(x0, y0), end=xy(x0+total_width, y0+c), layer=layer, stroke=pcb.Stroke(width=0),
fill=kc_gr.FillMode(pcb.Atom.solid)))
b.add(kc_gr.Rectangle(start=xy(x0+total_width-c, y0), end=xy(x0+total_width, y0+total_height), layer=layer, stroke=pcb.Stroke(width=0),
fill=kc_gr.FillMode(pcb.Atom.solid)))
b.add(kc_gr.Rectangle(start=xy(x0, y0+total_height-c), end=xy(x0+total_width, y0+total_height), layer=layer, stroke=pcb.Stroke(width=0),
fill=kc_gr.FillMode(pcb.Atom.solid)))
a = 3
timestamp = datetime.datetime.now().strftime('%Y-%m-%d')
b.add(kc_gr.Text(text=f'Planar inductor test panel {version_string} {timestamp} © 2023 Jan Götte, FG KOM, TU Darmstadt',
at=pcb.AtPos(x0 + c + a/3, y0 + c + a/3),
layer=kc_gr.TextLayer('F.SilkS'),
effects=pcb.TextEffect(
font=pcb.FontSpec(size=xy(a, a),
thickness=a/5),
justify=pcb.Justify(h=pcb.Atom.left, v=pcb.Atom.top))))
for index, ((y, x), spec) in enumerate(zip(itertools.product(range(rows), range(cols)), coil_specs), start=1):
pass
with tempfile.NamedTemporaryFile(suffix='.kicad_mod') as f:
tile_x0 = x0 + tooling_border + cut_gap + x*coil_pitch + tile_width/2
tile_y0 = y0 + tooling_border + cut_gap + y*coil_pitch + tile_height/2
for key, alias in {
'inner_diameter': 'id',
'outer_diameter': 'od',
'trace_width': 'w',
'turns': 'n',
'twists': 't',
'clearance': 'c',
'single_layer': 's',
'via_drill': 'v'}.items():
if alias in spec:
spec[key] = spec.pop(alias)
if 'via_diameter' not in spec:
spec['via_diameter'] = spec['trace_width']
if 'inner_diameter' not in spec:
spec['inner_diameter'] = 15
if 'outer_diameter' not in spec:
spec['outer_diameter'] = 35
args = ['python', '-m', 'twisted_coil_gen_twolayer']
for k, v in spec.items():
if not isinstance(v, bool) or v:
args.append('--' + k.replace('_', '-'))
if v is not True:
args.append(str(v))
args.append(f.name)
subprocess.run(args, check=True)
coil = fp.Footprint.open_mod(f.name)
coil.at = fp.AtPos(tile_x0, tile_y0, 0)
b.add(coil)
t = [f'n={spec["turns"]}',
f'{spec["twists"]} twists',
f'w={spec["trace_width"]:.2f}mm']
if spec.get('single_layer'):
t.append('single layer')
sz = 1.5
b.add(kc_gr.Text(text='\\n'.join(t),
at=pcb.AtPos(tile_x0, tile_y0),
layer=kc_gr.TextLayer('B.SilkS'),
effects=pcb.TextEffect(
font=pcb.FontSpec(size=xy(sz, sz),
thickness=sz/5),
justify=pcb.Justify(h=None, v=None, mirror=True))))
b.add(kc_gr.Text(text=f'{version_string} {timestamp}\\nTile {index}',
at=pcb.AtPos(tile_x0, tile_y0 - tile_height/2 + sz),
layer=kc_gr.TextLayer('B.SilkS'),
effects=pcb.TextEffect(
font=pcb.FontSpec(size=xy(sz, sz),
thickness=sz/5),
justify=pcb.Justify(h=None, v=pcb.Atom.top, mirror=True))))
b.add(kc_gr.Text(text=f'{index}',
at=pcb.AtPos(tile_x0, tile_y0 - tile_height/2 + sz),
layer=kc_gr.TextLayer('F.SilkS'),
effects=pcb.TextEffect(
font=pcb.FontSpec(size=xy(sz, sz),
thickness=sz/5),
justify=pcb.Justify(h=None, v=pcb.Atom.top, mirror=False))))
pads_x0 = tile_x0 + tile_width/2 - pad_offset
pads = make_pads(pads_x0, tile_y0, 270, 2, pad_dia, pad_length, pad_drill, pad_pitch)
b.add(pads)
w = min(spec.get('trace_width', pad_dia), pad_dia)
x, y, _r, _f = pads.pad(2).abs_pos
w2 = (x - pad_length/2, y)
x, y, _r, _f = pads.pad(1).abs_pos
w1 = (x - pad_length/2, y)
b.add(cad_pr.Trace(w, pads.pad(1), coil.pad(1), waypoints=[w1], orientation=['cw'], side='top'))
b.add(cad_pr.Trace(w, pads.pad(2), coil.pad(2), waypoints=[w2], orientation=['ccw'], side='bottom'))
k = 3
for layer in ['F.SilkS', 'B.SilkS']:
b.add(kc_gr.Rectangle(start=xy(x-k/2, y-pad_pitch-k/2), end=xy(x+k/2, y-pad_pitch), layer=layer, stroke=pcb.Stroke(width=0),
fill=kc_gr.FillMode(pcb.Atom.solid)))
b.write('coil_test_board.kicad_pcb')
|
