def external_silk(conf):
"""
Generate an external silkscreen.
For two row devices: Horizontal lines top and bottom, semicircle pin 1
For four row devices: Three sharp corners and a cut corner for pin 1
"""
out = []
rows = conf['rows']
chip_shape = conf['chip_shape']
w = silk_width
l = "F.SilkS"
x = chip_shape[0] / 2.0
y = chip_shape[1] / 2.0
bga = 'cols' in conf
if rows == 2 and not bga:
r = silk_pin1_er
out.append(fp_line((-x + 2 * r, -y), (x, -y), l, w))
out.append(fp_line((-x, y), (x, y), l, w))
out.append(fp_arc((-x + r, -y), (-x, -y), 180, l, w))
elif rows == 4 or bga:
if bga:
dx = x // 2
dy = y // 2
else:
if 'pins_first_row' in conf:
v_pins_per_row = conf['pins_first_row']
h_pins_per_row = (conf['pins'] - 2 * v_pins_per_row) // 2
pin_x = ((h_pins_per_row - 1) * conf['pin_pitch']) / 2.0
pin_y = ((v_pins_per_row - 1) * conf['pin_pitch']) / 2.0
else:
pins_per_row = conf['pins'] / rows
pin_x = pin_y = ((pins_per_row - 1) * conf['pin_pitch']) / 2.0
dx = x - pin_x - silk_pad_egap
dy = y - pin_y - silk_pad_egap
# NW
if bga:
dp1 = 1.0
out.append(fp_line((-x, -y + dy), (-x, -y + dp1), l, w))
out.append(fp_line((-x, -y + dp1), (-x + dp1, -y), l, w))
out.append(fp_line((-x + dx, -y), (-x + dp1, -y), l, w))
else:
dp1 = min(dx, dy)
out.append(fp_line((-x, -y + dp1), (-x + dp1, -y), l, w))
# NE
out.append(fp_line((x - dx, -y), (x, -y), l, w))
out.append(fp_line((x, -y), (x, -y + dy), l, w))
# SE
out.append(fp_line((x - dx, y), (x, y), l, w))
out.append(fp_line((x, y), (x, y - dy), l, w))
# SW
out.append(fp_line((-x + dx, y), (-x, y), l, w))
out.append(fp_line((-x, y), (-x, y - dy), l, w))
return out
def external_silk(conf):
"""
Generate an external silkscreen.
For two row devices: Horizontal lines top and bottom, semicircle pin 1
For four row devices: Three sharp corners and a cut corner for pin 1
"""
out = []
rows = conf['rows']
chip_shape = conf['chip_shape']
w = silk_width
l = "F.SilkS"
x = chip_shape[0]/2.0
y = chip_shape[1]/2.0
if rows == 2:
r = silk_pin1_er
out.append(fp_line((-x+2*r, -y), (x, -y), l, w))
out.append(fp_line((-x, y), (x, y), l, w))
out.append(fp_arc((-x+r, -y), (-x, -y), 180, l, w))
elif rows == 4:
if 'pins_first_row' in conf:
v_pins_per_row = conf['pins_first_row']
h_pins_per_row = (conf['pins'] - 2*v_pins_per_row) // 2
pin_x = ((h_pins_per_row - 1) * conf['pin_pitch']) / 2.0
pin_y = ((v_pins_per_row - 1) * conf['pin_pitch']) / 2.0
else:
pins_per_row = conf['pins'] / rows
pin_x = pin_y = ((pins_per_row - 1) * conf['pin_pitch']) / 2.0
dx = x - pin_x - silk_pad_egap
dy = y - pin_y - silk_pad_egap
# NW
d_pin1 = min(dx, dy)
out.append(fp_line((-x, -y+d_pin1), (-x+d_pin1, -y), l, w))
# NE
out.append(fp_line((x-dx, -y), (x, -y), l, w))
out.append(fp_line((x, -y), (x, -y+dy), l, w))
# SE
out.append(fp_line((x-dx, y), (x, y), l, w))
out.append(fp_line((x, y), (x, y-dy), l, w))
# SW
out.append(fp_line((-x+dx, y), (-x, y), l, w))
out.append(fp_line((-x, y), (-x, y-dy), l, w))
return out
def external_silk(conf):
"""
Generate an external silkscreen.
For two row devices: Horizontal lines top and bottom, semicircle pin 1
For four row devices: Three sharp corners and a cut corner for pin 1
"""
out = []
rows = conf['rows']
chip_shape = conf['chip_shape']
w = silk_width
l = "F.SilkS"
x = chip_shape[0]/2.0
y = chip_shape[1]/2.0
if rows == 2:
r = silk_pin1_er
out.append(fp_line((-x+2*r, -y), (x, -y), l, w))
out.append(fp_line((-x, y), (x, y), l, w))
out.append(fp_arc((-x+r, -y), (-x, -y), 180, l, w))
elif rows == 4:
pins = conf['pins'] / rows
pin_y = ((pins - 1) * conf['pin_pitch']) / 2.0
chip_y = chip_shape[1] / 2.0
delta_y = chip_y - pin_y
r = delta_y - silk_pad_egap
# NW
out.append(fp_line((-x, -y+r), (-x+r, -y), l, w))
# NE
out.append(fp_line((x-r, -y), (x, -y), l, w))
out.append(fp_line((x, -y), (x, -y+r), l, w))
# SE
out.append(fp_line((x-r, y), (x, y), l, w))
out.append(fp_line((x, y), (x, y-r), l, w))
# SW
out.append(fp_line((-x+r, y), (-x, y), l, w))
out.append(fp_line((-x, y), (-x, y-r), l, w))
return out
def external_silk(conf):
"""
Generate an external silkscreen.
For two row devices: Horizontal lines top and bottom, semicircle pin 1
For four row devices: Three sharp corners and a cut corner for pin 1
"""
out = []
rows = conf['rows']
chip_shape = conf['chip_shape']
w = silk_width
l = "F.SilkS"
x = chip_shape[0] / 2.0
y = chip_shape[1] / 2.0
if rows == 2:
r = silk_pin1_er
out.append(fp_line((-x + 2 * r, -y), (x, -y), l, w))
out.append(fp_line((-x, y), (x, y), l, w))
out.append(fp_arc((-x + r, -y), (-x, -y), 180, l, w))
elif rows == 4:
pins = conf['pins'] / rows
pin_y = ((pins - 1) * conf['pin_pitch']) / 2.0
chip_y = chip_shape[1] / 2.0
delta_y = chip_y - pin_y
r = delta_y - silk_pad_egap
# NW
out.append(fp_line((-x, -y + r), (-x + r, -y), l, w))
# NE
out.append(fp_line((x - r, -y), (x, -y), l, w))
out.append(fp_line((x, -y), (x, -y + r), l, w))
# SE
out.append(fp_line((x - r, y), (x, y), l, w))
out.append(fp_line((x, y), (x, y - r), l, w))
# SW
out.append(fp_line((-x + r, y), (-x, y), l, w))
out.append(fp_line((-x, y), (-x, y - r), l, w))
return out