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from dataclasses import dataclass
from ..utils import MM
from .primitives import *
@dataclass
class PadRing(Positioned):
w: int
h: int
pitch: float = 2.54
clearance: float = 0.2
rows: int = 2
trace_width: float = 0.4
drill_dia: float = 0.9
stagger: bool = False
def ports(self):
x, y, rotation = self.abs_pos
x += self.pitch/2
y += self.pitch/2
x += self.pitch * self.rows
y += self.pitch * self.rows
pad_dia = self.pitch - 2*self.clearance - self.trace_width
offset = pad_dia/2 - self.trace_width/2
for i in range(1, self.w):
yield (x+self.pitch/2 + i*self.pitch, y+offset)
yield (x+self.pitch/2 + i*self.pitch, y+(self.h+1)*self.pitch-offset)
for i in range(1, self.h):
yield (x+offset, y+self.pitch/2 + i*self.pitch)
yield (x+(self.w+1)*self.pitch-offset, y+self.pitch/2 + i*self.pitch)
def generate(self, bbox, border_text, unit=MM):
x, y, rotation = self.abs_pos
x += self.pitch/2
y += self.pitch/2
x += self.pitch * self.rows
y += self.pitch * self.rows
pad_dia = self.pitch - 2*self.clearance - self.trace_width
for i in range(self.w + 2 + 2*(self.rows-1)):
for j in range(self.rows):
yield THTPad.circle(x + (i - (self.rows - 1))*self.pitch, y - j*self.pitch, self.drill_dia, pad_dia, paste=False)
yield THTPad.circle(x + (i - (self.rows - 1))*self.pitch, y + (self.h + 1 + j)*self.pitch, self.drill_dia, pad_dia, paste=False)
if self.rows >= 2 and 1 <= i < self.w:
yield Trace(self.trace_width, start=(x+i*self.pitch, y-self.pitch), end=(x+(i + 0.5)*self.pitch, y+pad_dia/2 - self.trace_width/2))
yield Trace(self.trace_width, start=(x+i*self.pitch, y+(self.h+2)*self.pitch), end=(x+(i + 0.5)*self.pitch, y+(self.h+1)*self.pitch -pad_dia/2 + self.trace_width/2), orientation=('cw',))
for i in range(1, self.h+1):
for j in range(self.rows):
yield THTPad.circle(x - j*self.pitch, y + i*self.pitch, self.drill_dia, pad_dia, paste=False)
yield THTPad.circle(x + (self.w + 1 + j)*self.pitch, y + i*self.pitch, self.drill_dia, pad_dia, paste=False)
if self.rows >= 2 and i < self.h:
yield Trace(self.trace_width,
start=(
x-self.pitch,
y+i*self.pitch),
end=(
x+pad_dia/2 - self.trace_width/2,
y+(i + 0.5)*self.pitch),
orientation=('cw',))
yield Trace(self.trace_width,
start=(
x+(self.w+2)*self.pitch,
y+i*self.pitch),
end=(
x+(self.w+1)*self.pitch -pad_dia/2 + self.trace_width/2,
y+(i + 0.5)*self.pitch))
def _breakout_demo():
b = Board(100, 80)
ring = PadRing(5, 5, 8, 12)
for obj in ring.generate(None, None):
b.add(obj)
for x, y in ring.ports():
b.add(Trace(0.1, start=(23, 27), end=(x, y)))
with open('/tmp/test.svg', 'w') as f:
f.write(str(b.pretty_svg()))
b.layer_stack().save_to_directory('/tmp/testdir')
if __name__ == '__main__':
_breakout_demo()
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