Add missing protoboard file, add powered proto layout
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jaseg
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1 changed files with 341 additions and 0 deletions
341
gerbonara/cad/protoboard.py
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341
gerbonara/cad/protoboard.py
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import sys
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import re
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import math
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from copy import copy, deepcopy
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import warnings
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from .primitives import *
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from ..graphic_objects import Region
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from ..apertures import RectangleAperture, CircleAperture
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class ProtoBoard(Board):
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def __init__(self, w, h, content, margin=None, corner_radius=None, mounting_hole_dia=None, mounting_hole_offset=None, unit=MM):
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corner_radius = corner_radius or unit(1.5, MM)
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super().__init__(w, h, corner_radius, unit=unit)
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self.margin = margin or unit(2, MM)
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self.content = content
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if mounting_hole_dia:
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mounting_hole_offset = mounting_hole_offset or mounting_hole_dia*2
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ko = mounting_hole_offset*2
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self.add(Hole(mounting_hole_offset, mounting_hole_offset, mounting_hole_dia, unit=unit))
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self.add(Hole(w-mounting_hole_offset, mounting_hole_offset, mounting_hole_dia, unit=unit))
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self.add(Hole(mounting_hole_offset, h-mounting_hole_offset, mounting_hole_dia, unit=unit))
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self.add(Hole(w-mounting_hole_offset, h-mounting_hole_offset, mounting_hole_dia, unit=unit))
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self.keepouts.append(((0, 0), (ko, ko)))
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self.keepouts.append(((w-ko, 0), (w, ko)))
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self.keepouts.append(((0, h-ko), (ko, h)))
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self.keepouts.append(((w-ko, h-ko), (w, h)))
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self.generate()
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def generate(self, unit=MM):
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bbox = ((self.margin, self.margin), (self.w-self.margin, self.h-self.margin))
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bbox = unit.convert_bounds_from(self.unit, bbox)
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for obj in self.content.generate(bbox, unit):
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self.add(obj, keepout_errors='skip')
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class PropLayout:
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def __init__(self, content, direction, proportions):
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self.content = list(content)
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if direction not in ('h', 'v'):
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raise ValueError('direction must be one of "h", or "v".')
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self.direction = direction
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self.proportions = list(proportions)
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if len(content) != len(proportions):
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raise ValueError('proportions and content must have same length')
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def generate(self, bbox, unit=MM):
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for bbox, child in self.layout_2d(bbox, unit):
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yield from child.generate(bbox, unit)
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def fit_size(self, w, h, unit=MM):
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widths = []
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heights = []
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for ((x_min, y_min), (x_max, y_max)), child in self.layout_2d(((0, 0), (w, h)), unit):
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if not isinstance(child, EmptyProtoArea):
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widths.append(x_max - x_min)
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heights.append(y_max - y_min)
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if self.direction == 'h':
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return sum(widths), max(heights)
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else:
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return max(widths), sum(heights)
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def layout_2d(self, bbox, unit=MM):
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(x, y), (w, h) = bbox
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w, h = w-x, h-y
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actual_l = 0
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target_l = 0
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for l, child in zip(self.layout(w if self.direction == 'h' else h, unit), self.content):
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this_x, this_y = x, y
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this_w, this_h = w, h
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target_l += l
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if self.direction == 'h':
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this_w = target_l - actual_l
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else:
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this_h = target_l - actual_l
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this_w, this_h = child.fit_size(this_w, this_h, unit)
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if self.direction == 'h':
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x += this_w
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actual_l += this_w
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this_h = h
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else:
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y += this_h
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actual_l += this_h
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this_w = w
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yield ((this_x, this_y), (this_x+this_w, this_y+this_h)), child
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def layout(self, length, unit=MM):
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out = [ eval_value(value, MM(length, unit)) for value in self.proportions ]
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total_length = sum(value for value in out if value is not None)
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if length - total_length < -1e-6:
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raise ValueError(f'Proportions sum to {total_length} mm, which is greater than the available space of {length} mm.')
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leftover = length - total_length
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sum_props = sum( (value or 1.0) for value in self.proportions if not isinstance(value, str) )
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return [ unit(leftover * (value or 1.0) / sum_props if not isinstance(value, str) else calculated, MM)
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for value, calculated in zip(self.proportions, out) ]
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def __str__(self):
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children = ', '.join( f'{elem}:{width}' for elem, width in zip(self.content, self.proportions))
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return f'PropLayout[{self.direction.upper()}]({children})'
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class TwoSideLayout:
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def __init__(self, top, bottom):
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self.top, self.bottom = top, bottom
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if not top.single_sided or not bottom.single_sided:
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warnings.warn('Two-sided pattern used on one side of a TwoSideLayout')
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def fit_size(self, w, h, unit=MM):
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w1, h1 = self.top.fit_size(w, h, unit)
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w2, h2 = self.bottom.fit_size(w, h, unit)
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if isinstance(self.top, EmptyProtoArea):
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if isinstance(self.bottom, EmptyProtoArea):
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return w1, h1
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return w2, h2
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if isinstance(self.bottom, EmptyProtoArea):
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return w1, h1
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return max(w1, w2), max(h1, h2)
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def generate(self, bbox, unit=MM):
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yield from self.top.generate(bbox, unit)
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for obj in self.bottom.generate(bbox, unit):
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obj.side = 'bottom'
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yield obj
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class PatternProtoArea:
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def __init__(self, pitch_x, pitch_y=None, obj=None, unit=MM):
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self.pitch_x = pitch_x
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self.pitch_y = pitch_y or pitch_x
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self.obj = obj
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self.unit = unit
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def fit_size(self, w, h, unit=MM):
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(min_x, min_y), (max_x, max_y) = self.fit_rect(((0, 0), (w, h)))
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return max_x-min_x, max_y-min_y
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def fit_rect(self, bbox, unit=MM):
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(x, y), (w, h) = bbox
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w, h = w-x, h-y
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w_mod = round((w + 5e-7) % unit(self.pitch_x, self.unit), 6)
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h_mod = round((h + 5e-7) % unit(self.pitch_y, self.unit), 6)
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w_fit, h_fit = round(w - w_mod, 6), round(h - h_mod, 6)
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x = x + (w-w_fit)/2
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y = y + (h-h_fit)/2
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return (x, y), (x+w_fit, y+h_fit)
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def generate(self, bbox, unit=MM):
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(x, y), (w, h) = bbox
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w, h = w-x, h-y
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n_x = int(w//unit(self.pitch_x, self.unit))
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n_y = int(h//unit(self.pitch_y, self.unit))
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off_x = (w % unit(self.pitch_x, self.unit)) / 2
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off_y = (h % unit(self.pitch_y, self.unit)) / 2
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for i in range(n_x):
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for j in range(n_y):
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if hasattr(self.obj, 'inst'):
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inst = self.obj.inst(i, j)
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else:
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inst = copy(self.obj)
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inst.x = inst.unit(off_x + x, unit) + (i + 0.5) * inst.unit(self.pitch_x, self.unit)
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inst.y = inst.unit(off_y + y, unit) + (j + 0.5) * inst.unit(self.pitch_y, self.unit)
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yield inst
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@property
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def single_sided(self):
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return self.obj.single_sided
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class EmptyProtoArea:
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def __init__(self, copper_fill=False):
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self.copper_fill = copper_fill
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def fit_size(self, w, h, unit=MM):
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return w, h
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def generate(self, bbox, unit=MM):
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if self.copper:
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(min_x, min_y), (max_x, max_y) = bbox
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yield ObjectGroup(top_copper=[Region([(min_x, min_y), (max_x, min_y), (max_x, max_y), (min_x, max_y)],
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unit=unit, polarity_dark=True)])
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@property
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def single_sided(self):
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return True
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class ManhattanPads(ObjectGroup):
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def __init__(self, w, h=None, gap=0.2, unit=MM):
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super().__init__(0, 0)
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h = h or w
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self.gap = gap
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self.unit = unit
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p = (w-2*gap)/2
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q = (h-2*gap)/2
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small_ap = RectangleAperture(p, q, unit=unit)
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s = min(w, h) / 2 / math.sqrt(2)
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large_ap = RectangleAperture(s, s, rotation=math.pi/4, unit=unit)
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large_ap_neg = RectangleAperture(s+2*gap, s+2*gap, rotation=math.pi/4, unit=unit)
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a = gap/2 + p/2
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b = gap/2 + q/2
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self.top_copper.append(Flash(-a, -b, aperture=small_ap, unit=unit))
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self.top_copper.append(Flash(-a, b, aperture=small_ap, unit=unit))
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self.top_copper.append(Flash( a, -b, aperture=small_ap, unit=unit))
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self.top_copper.append(Flash( a, b, aperture=small_ap, unit=unit))
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self.top_copper.append(Flash(0, 0, aperture=large_ap_neg, polarity_dark=False, unit=unit))
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self.top_copper.append(Flash(0, 0, aperture=large_ap, unit=unit))
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self.top_mask = self.top_copper
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class PoweredProto(ObjectGroup):
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def __init__(self, pitch=None, drill=None, clearance=None, power_pad_dia=None, via_size=None, trace_width=None, unit=MM):
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super().__init__(0, 0)
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self.unit = unit
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self.pitch = pitch = pitch or unit(2.54, MM)
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self.drill = drill = drill or unit(0.9, MM)
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self.clearance = clearance = clearance or unit(0.3, MM)
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self.trace_width = trace_width = trace_width or unit(0.3, MM)
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self.via_size = via_size = via_size or unit(0.4, MM)
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main_pad_dia = pitch - trace_width - 2*clearance
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power_pad_dia_max = math.sqrt(2)*pitch - main_pad_dia - 2*clearance
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if power_pad_dia is None:
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power_pad_dia = power_pad_dia_max - clearance # reduce some more to give the user more room
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elif power_pad_dia > power_pad_dia_max:
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warnings.warn(f'Power pad diameter {power_pad_dia} > {power_pad_dia_max} violates pad-to-pad clearance')
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self.power_pad_dia = power_pad_dia
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main_ap = CircleAperture(main_pad_dia, unit=unit)
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power_ap = CircleAperture(self.power_pad_dia, unit=unit)
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for l in [self.top_copper, self.bottom_copper]:
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l.append(Flash(0, 0, aperture=main_ap, unit=unit))
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l.append(Flash(-pitch/2, -pitch/2, aperture=power_ap, unit=unit))
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l.append(Flash(-pitch/2, pitch/2, aperture=power_ap, unit=unit))
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l.append(Flash( pitch/2, -pitch/2, aperture=power_ap, unit=unit))
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l.append(Flash( pitch/2, pitch/2, aperture=power_ap, unit=unit))
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self.drill_pth.append(Flash(0, 0, ExcellonTool(drill, plated=True, unit=unit), unit=unit))
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self.drill_pth.append(Flash(-pitch/2, -pitch/2, ExcellonTool(via_size, plated=True, unit=unit), unit=unit))
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self.top_mask = copy(self.top_copper)
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self.bottom_mask = copy(self.bottom_copper)
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self.line_ap = CircleAperture(trace_width, unit=unit)
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self.top_copper.append(Line(-pitch/2, -pitch/2, -pitch/2, pitch/2, aperture=self.line_ap, unit=unit))
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self.top_copper.append(Line(pitch/2, -pitch/2, pitch/2, pitch/2, aperture=self.line_ap, unit=unit))
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self.bottom_copper.append(Line(-pitch/2, -pitch/2, pitch/2, -pitch/2, aperture=self.line_ap, unit=unit))
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self.bottom_copper.append(Line(-pitch/2, pitch/2, pitch/2, pitch/2, aperture=self.line_ap, unit=unit))
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def inst(self, x, y):
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inst = copy(self)
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if (x + y) % 2 == 0:
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inst.drill_pth = inst.drill_pth[:-1]
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c = self.power_pad_dia/2 + self.clearance
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p = self.pitch/2
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if x == 1:
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inst.top_silk = [Line(-p, -p+c, -p, p-c, aperture=self.line_ap, unit=self.unit)]
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elif x % 2 == 0:
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inst.top_silk = [Line(p, -p+c, p, p-c, aperture=self.line_ap, unit=self.unit)]
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if y == 0:
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inst.bottom_silk = [Line(-p+c, -p, p-c, -p, aperture=self.line_ap, unit=self.unit)]
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elif y % 2 == 1:
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inst.bottom_silk = [Line(-p+c, p, p-c, p, aperture=self.line_ap, unit=self.unit)]
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return inst
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def bounding_box(self, unit=MM):
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x, y, rotation = self.abs_pos
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p = self.pitch/2
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return unit.convert_bounds_from(self.unit, ((x-p, y-p), (x+p, y+p)))
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def convert_to_mm(value, unit):
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unitl = unit.lower()
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if unitl == 'mm':
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return value
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elif unitl == 'cm':
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return value*10
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elif unitl == 'in':
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return value*25.4
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elif unitl == 'mil':
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return value/1000*25.4
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else:
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raise ValueError(f'Invalid unit {unit}, allowed units are mm, cm, in, and mil.')
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_VALUE_RE = re.compile('([0-9]*\.?[0-9]+)(cm|mm|in|mil|%)')
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def eval_value(value, total_length=None):
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if not isinstance(value, str):
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return None
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m = _VALUE_RE.match(value.lower())
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number, unit = m.groups()
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if unit == '%':
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if total_length is None:
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raise ValueError('Percentages are not allowed for this value')
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return total_length * float(number) / 100
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return convert_to_mm(float(number), unit)
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def _demo():
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#pattern1 = PatternProtoArea(2.54, obj=THTPad.circle(0, 0, 0.9, 1.8, paste=False))
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#pattern2 = PatternProtoArea(1.2, 2.0, obj=SMDPad.rect(0, 0, 1.0, 1.8, paste=False))
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#pattern3 = PatternProtoArea(2.54, 1.27, obj=SMDPad.rect(0, 0, 2.3, 1.0, paste=False))
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#stack = TwoSideLayout(pattern2, pattern3)
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#layout = PropLayout([pattern1, stack], 'h', [0.5, 0.5])
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#pattern = PatternProtoArea(2.54, obj=ManhattanPads(2.54))
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pattern = PatternProtoArea(2.54, obj=PoweredProto())
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pb = ProtoBoard(100, 80, pattern, mounting_hole_dia=3.2, mounting_hole_offset=5)
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print(pb.pretty_svg())
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pb.layer_stack().save_to_directory('/tmp/testdir')
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if __name__ == '__main__':
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_demo()
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