def place_parts(json_dict, pcb):
# compute upper left corner of board
board_ul = Point(*BoardTools.get_board_ul(json_dict['board_edge']))
# place all components
for name, module in json_dict['module_dict'].items():
if module['type'] == 'comp':
# set rotation
rot = module['rotation']
pcb.modules[name].rotation = rot
# make the buffer vector
if round(degrees(rot)) in [0, 180]:
buf_space = Point(module['bufx'], module['bufy'])
elif round(degrees(rot)) in [90, 270]:
buf_space = Point(module['bufy'], module['bufx'])
else:
raise Exception("Can't determine rotation.")
# set position
pcb.modules[name].position = \
pcb.modules[name].position \
+ Point(module['x'], module['y']) \
+ buf_space \
+ board_ul \
- pcb.modules[name].boundingBox.ul
elif module['type'] == 'keepout':
pass
else:
raise Exception('Unimplemented component type: ' +
str(module['type']))
def draw_board_edge(json_dict, pcb):
# compute upper left corner of board
board_ul = Point(*BoardTools.get_board_ul(json_dict['board_edge']))
# draw edge
edge = [Point(x, y) + board_ul for x, y in json_dict['board_edge']]
pcb.add_polyline(edge, layer='Edge.Cuts')
def __init__(self, start, end, layer='F.SilkS', width=0.15, board=None):
line = pcbnew.DRAWSEGMENT(board and board.native_obj)
line.SetShape(pcbnew.S_SEGMENT)
line.SetStart(Point.native_from(start))
line.SetEnd(Point.native_from(end))
line.SetLayer(pcbnew_layer.get_board_layer(board, layer))
line.SetWidth(int(width * units.DEFAULT_UNIT_IUS))
self._obj = line
def __init__(self, start, end, layer='F.SilkS', width=0.15, board=None):
line = pcbnew.DRAWSEGMENT(board and board.native_obj)
line.SetShape(pcbnew.S_SEGMENT)
line.SetStart(Point.native_from(start))
line.SetEnd(Point.native_from(end))
line.SetLayer(pcbnew_layer.get_board_layer(board, layer))
line.SetWidth(int(width * units.DEFAULT_UNIT_IUS))
self._obj = line
def __init__(self, width, start, end, layer="F.Cu", board=None):
self._track = pcbnew.TRACK(board and board.native_obj)
self._track.SetWidth(int(width * units.DEFAULT_UNIT_IUS))
if board:
self._track.SetLayer(board.get_layer(layer))
else:
self._track.SetLayer(pcbnew_layer.get_std_layer(layer))
self._track.SetStart(Point.native_from(start))
self._track.SetEnd(Point.native_from(end))
def __init__(self, width, start, end, layer='F.Cu', board=None):
self._track = pcbnew.TRACK(board and board.native_obj)
self._track.SetWidth(int(width * units.DEFAULT_UNIT_IUS))
if board:
self._track.SetLayer(board.get_layer(layer))
else:
self._track.SetLayer(pcbnew_layer.get_std_layer(layer))
self._track.SetStart(Point.native_from(start))
self._track.SetEnd(Point.native_from(end))
def __init__(self, center, radius, layer='F.SilkS', width=0.15,
board=None):
circle = pcbnew.DRAWSEGMENT(board and board.native_obj)
circle.SetShape(pcbnew.S_CIRCLE)
circle.SetCenter(Point.native_from(center))
start_coord = Point.native_from(
(center[0], center[1] + radius))
circle.SetArcStart(start_coord)
circle.SetLayer(pcbnew_layer.get_board_layer(board, layer))
circle.SetWidth(int(width * units.DEFAULT_UNIT_IUS))
self._obj = circle
def __init__(self, center, radius, layer='F.SilkS', width=0.15,
board=None):
circle = pcbnew.DRAWSEGMENT(board and board.native_obj)
circle.SetShape(pcbnew.S_CIRCLE)
circle.SetCenter(Point.native_from(center))
start_coord = Point.native_from(
(center[0], center[1] + radius))
circle.SetArcStart(start_coord)
circle.SetLayer(pcbnew_layer.get_board_layer(board, layer))
circle.SetWidth(int(width * units.DEFAULT_UNIT_IUS))
self._obj = circle
def get_fixed_pos(self):
if self.mode.lower() == 'ul':
ul_relative = Point(0, 0)
elif self.mode.lower() == 'pin1':
ul_relative = self.boundingBox.ul - self['1'].pad.center
elif self.mode.lower() == 'center':
comp_center = Point.wrap(self.module._obj.GetCenter())
ul_relative = self.boundingBox.ul - comp_center
else:
raise Exception('Unimplemented positioning mode.')
return self.position + ul_relative
def __init__(self, center, radius, start_angle, stop_angle,
layer='F.SilkS', width=0.15, board=None):
start_coord = radius * cmath.exp(math.radians(start_angle - 90) * 1j)
start_coord = Point.native_from((start_coord.real, start_coord.imag))
angle = stop_angle - start_angle
arc = pcbnew.DRAWSEGMENT(board and board.native_obj)
arc.SetShape(pcbnew.S_ARC)
arc.SetCenter(Point.native_from(center))
arc.SetArcStart(start_coord)
arc.SetAngle(angle * 10)
arc.SetLayer(pcbnew_layer.get_board_layer(board, layer))
arc.SetWidth(int(width * units.DEFAULT_UNIT_IUS))
self._obj = arc
def add_keepouts(self, min_kw=1e-3, min_kh=1e-3):
# TODO: handle more general cases
# determine the board height from the edge
ylist = [p.y for p in self.edge]
height = max(ylist) - min(ylist)
for p0, p1 in zip(self.edge[:-1], self.edge[1:]):
x0, y0 = p0
x1, y1 = p1
if x1 > x0:
# quadrants I and IV
kw = x1 - x0
kh = max(y0, y1)
kx = x0
ky = 0
elif x0 > x1:
# quadrants II and III
kw = x0 - x1
kh = height - min(y0, y1)
kx = x1
ky = min(y0, y1)
else:
continue
if kw > min_kw and kh > min_kw:
kpos = Point(kx, ky)
self.add(PcbKeepout(width=kw, height=kh, position=kpos))
def boundary(edge):
ul = Point(*BoardTools.get_board_ul(edge))
edge = [ul + Point(x, y) for x, y in edge]
# repeat the last point
edge = edge + [edge[-1]]
# add points to the edge
path = ['path', 'pcb', '0']
for point in edge:
# convert points from mm to um
# and negate y coordinate
x = '%d' % dsnx(point.x)
y = '%d' % dsny(point.y)
path = path[:] + [x, y]
return ['boundary', path]
def inst_atmega328p(self):
# Main microcontroller
atmega328 = ATMEGA328P()
self.pcb.add(atmega328)
# Power connections
atmega328.wire_power(vdd='+5V', gnd='GND')
self.add_dcap(atmega328.get_pin('VCC'))
self.add_dcap(atmega328.get_pin('AVCC'))
# Analog reference
atmega328.get_pin('AREF').wire('AREF')
self.add_dcap(atmega328.get_pin('AREF'))
# Crystal circuit
atmega328.wire_xtal('XTAL1', 'XTAL2')
self.pcb.add(Crystal('XTAL1', 'XTAL2'))
self.pcb.add(Capacitor('XTAL1', 'GND', value=22e-12))
self.pcb.add(Capacitor('XTAL2', 'GND', value=22e-12))
# Crystal routing constraints
self.pcb.add_net_constr('XTAL1', length=4)
self.pcb.add_net_constr('XTAL2', length=4)
# Reset circuit
atmega328.get_pin('~RESET~').wire('RESET')
self.pcb.add(Resistor('RESET', '+5V', value=10e3))
# Reset button
self.pcb.add(SPST('RESET', 'GND'))
# ICSP connector
icsp_pos = Point(2505.512, self.top - 1198.031, 'mils')
self.pcb.add(
ICSP(
sck='IO13',
miso='IO12',
mosi='IO11',
reset='RESET',
vdd='+5V',
gnd='GND',
position=icsp_pos,
mode='PIN1'))
# Wire Port B
pb = atmega328.PB
for idx in range(6):
pb[idx].wire('IO' + str(idx + 8))
# Wire Port C
pc = atmega328.PC
for idx in range(6):
pc[idx].wire('AD' + str(idx))
# Wire Port D
pd = atmega328.PD
for idx in range(8):
pd[idx].wire('IO' + str(idx))
def make_nets(pcb, out):
out = [x for x in out[1:] if x[0] == 'net']
for entry in out:
net = entry[1].replace('"', '')
for routing in entry[2:]:
if routing[0] == 'wire':
paths = [x for x in routing[1:] if x[0] == 'path']
for path in paths:
layer = path[1]
width = float(path[2]) / 1e4
coords = [
Point(sesx(x), sesy(y))
for x, y in chunks(path[3:], 2)
]
pcb.add_track(coords, layer, width, net)
elif routing[0] == 'via':
via_name = routing[1]
size, drill = get_via_params(via_name)
coord = Point(sesx(routing[2]), sesy(routing[3]))
pcb.add_via(coord=coord, size=size, drill=drill, net=net)
def __init__(self, coord, layer_pair, size, drill, board=None):
self._via = pcbnew.VIA(board and board.native_obj)
self._via.SetViaType(via_type)
self._via.SetWidth(int(size * units.DEFAULT_UNIT_IUS))
coord_point = Point.build_from(coord)
self._via.SetEnd(coord_point.native_obj)
self._via.SetStart(coord_point.native_obj)
if board:
self._via.SetLayerPair(board.get_layer(layer_pair[0]), board.get_layer(layer_pair[1]))
else:
self._via.SetLayerPair(layer.get_std_layer(layer_pair[0]), layer.get_std_layer(layer_pair[1]))
self._via.SetDrill(int(drill * units.DEFAULT_UNIT_IUS))
def compile(self):
print 'Adding components'
r1 = Resistor('VDD', 'V1')
r2 = Resistor('V1', 'V2')
r3 = Resistor('V2', 'V3')
r4 = Resistor('V3', 'GND')
self.pcb.add(r1, r2, r3, r4)
width = 20.0
height = 20.0
print 'Defining the board edge'
self.pcb.edge = [
Point(0, 0),
Point(width, 0),
Point(width, height),
Point(0, height),
Point(0, 0)
]
print 'Compiling PCB'
self.pcb.compile(json_file=self.json_fname)
def inst_ldo(self):
# Barrel jack for 7-12V supply
jack_pos = Point(-75, self.top - 475, 'mils')
jack = BarrelJack('PWRIN', 'GND', position=jack_pos, mode='UL')
diode = Diode('PWRIN', 'VIN')
self.pcb.add(jack, diode)
# 5.0V LDO
ldo_5v0 = LDO_5v0(vin='VIN', gnd='GND', vout='VCC')
self.pcb.add(ldo_5v0)
self.add_dcap(ldo_5v0.get_pin('IN'))
self.add_dcap(ldo_5v0.get_pin('IN'), value=47e-6)
self.add_dcap(ldo_5v0.get_pin('OUT'))
self.add_dcap(ldo_5v0.get_pin('OUT'), value=47e-6)
def __init__(self, coord, layer_pair, diameter, drill, board=None):
self._obj = pcbnew.VIA(board and board.native_obj)
self.diameter = diameter
coord_point = Point.build_from(coord)
self._obj.SetEnd(coord_point.native_obj)
self._obj.SetStart(coord_point.native_obj)
if board:
self._obj.SetLayerPair(board.get_layer(layer_pair[0]),
board.get_layer(layer_pair[1]))
else:
self._obj.SetLayerPair(layer.get_std_layer(layer_pair[0]),
layer.get_std_layer(layer_pair[1]))
self.drill = drill
def __init__(self, coord, layer_pair, size, drill, board=None):
self._via = pcbnew.VIA(board and board.native_obj)
self._via.SetWidth(int(size * units.DEFAULT_UNIT_IUS))
coord_point = Point.build_from(coord)
self._via.SetEnd(coord_point.native_obj)
self._via.SetStart(coord_point.native_obj)
if board:
self._via.SetLayerPair(board.get_layer(layer_pair[0]),
board.get_layer(layer_pair[1]))
else:
self._via.SetLayerPair(layer.get_std_layer(layer_pair[0]),
layer.get_std_layer(layer_pair[1]))
self._via.SetDrill(int(drill * units.DEFAULT_UNIT_IUS))
def inst_usb(self):
# USB B connector
usb_pos = Point(-250, self.top - 1725, 'mils')
usb = UsbConnB(vdd='XUSB',
dm='D-',
dp='D+',
gnd='GND',
shield='GND',
position=usb_pos,
rotation=pi,
mode='UL')
self.pcb.add(usb)
# Polyfuse to protect computer from shorts on the Freeduino board
self.pcb.add(PTC('XUSB', 'USBVCC'))
# USB bypass cap
self.pcb.add(Capacitor('USBVCC', 'GND'))
# Power header
self.pcb.add(Header('USBVCC', '+5V', 'VCC', type='male'))
def center(self):
return Point.wrap(self._obj.GetCenter())
def center(self):
"""Via center"""
return Point.wrap(self._obj.GetCenter())
def main():
# load command-line arguments
parser = argparse.ArgumentParser()
parser.add_argument('--json')
parser.add_argument('--pcb')
parser.add_argument('--fill_top', default='GND')
parser.add_argument('--fill_bot', default='GND')
parser.add_argument('--bufx', type=float, default=0.5)
parser.add_argument('--bufy', type=float, default=0.5)
args = parser.parse_args()
# read board placement from SMT-PCB
with open(args.json, 'r') as f:
json_dict = json.load(f)
# get the board edge
board_edge = json_dict['board_edge']
board_ul = Point(*BoardTools.get_board_ul(board_edge))
# compute board center
cx, cy = BoardTools.get_board_center(board_edge)
edge = []
for idx, (x, y) in enumerate(board_edge):
if x < cx:
px = x - args.bufx
else:
px = x + args.bufx
if y < cy:
py = y - args.bufy
else:
py = y + args.bufy
board_edge[idx] = (px, py)
# write board edge back
with open(args.json, 'w') as f:
json.dump(json_dict, f, indent=2, sort_keys=True)
# create the new board edge
edge = [Point(x, y) + board_ul for x, y in board_edge]
# create zone outline for copper pours
minx = min([p.x for p in edge])
maxx = max([p.x for p in edge])
miny = min([p.y for p in edge])
maxy = max([p.y for p in edge])
ul = Point(minx, miny)
ur = Point(maxx, miny)
lr = Point(maxx, maxy)
ll = Point(minx, maxy)
outline = [ul, ur, lr, ll]
# write changes to board
pcb = Board.load(args.pcb)
# write edge
pcb.clearLayer('Edge.Cuts')
pcb.add_polyline(edge, layer='Edge.Cuts')
# write zones
#clearance = max(args.bufx, args.bufy)
#pcb.add_zone(outline, args.fill_top, 'F.Cu', clearance)
#pcb.add_zone(outline, args.fill_bot, 'B.Cu', clearance)
pcb.save()
def end(self):
return Point.wrap(self._obj.GetEnd())
def start(self, value):
self._obj.SetStart(Point.native_from(value))
def inst_headers(self):
# Digital 10-pin header
header_pos = Point(1640, self.top - 2000, 'mils')
header_rot = 3.0 * pi / 2.0
self.pcb.add(
Header(
'IO8',
'IO9',
'IO10',
'IO11',
'IO12',
'IO13',
'GND',
'AREF',
'AD4',
'AD5',
type='female',
position=header_pos,
rotation=header_rot,
mode='PIN1'))
# Digital 8-pin header
header_pos = Point(2500, self.top - 2000, 'mils')
header_rot = 3.0 * pi / 2.0
self.pcb.add(
Header(
'IO0',
'IO1',
'IO2',
'IO3',
'IO4',
'IO5',
'IO6',
'IO7',
type='female',
position=header_pos,
rotation=header_rot,
mode='PIN1'))
# Analog 6-pin header
header_pos = Point(2000, self.top - 100, 'mils')
header_rot = pi / 2.0
self.pcb.add(
Header(
'AD0',
'AD1',
'AD2',
'AD3',
'AD4',
'AD5',
type='female',
position=header_pos,
rotation=header_rot,
mode='PIN1'))
# Power header
header_pos = Point(1100, self.top - 100, 'mils')
header_rot = pi / 2.0
self.pcb.add(
Header(
None,
'+5V',
'RESET',
'+3V3',
'+5V',
'GND',
'GND',
'VIN',
type='female',
position=header_pos,
rotation=header_rot,
mode='PIN1'))
def position(self):
return Point.wrap(self._obj.GetPosition())
def end(self, value):
self._obj.SetArcEnd(Point.native_from(value))
def center(self, value):
self._obj.SetCenter(Point.native_from(value))
def position(self, value):
self._obj.SetPosition(Point.native_from(value))
def position(self, value):
self._obj.SetPosition(Point.native_from(value))
def position(self):
return Point.wrap(self._obj.GetPosition())
def __init__(self, width, start, end, layer='F.Cu', board=None):
self._obj = pcbnew.TRACK(board and board.native_obj)
self._obj.SetWidth(int(width * units.DEFAULT_UNIT_IUS))
self.layer = layer
self._obj.SetStart(Point.native_from(start))
self._obj.SetEnd(Point.native_from(end))
def start(self):
return Point.wrap(self._obj.GetStart())
def define_edge(self):
# create list of points representing the board edge
points = [(0, 0), (0, 2100), (2540, 2100), (2600, 2040), (2600, 1590),
(2700, 1490), (2700, 200), (2600, 100), (2600, 0), (0, 0)]
points = [Point(x, self.top - y, 'mils') for x, y in points]
self.pcb.edge = points
def inst_mounting_holes(self):
coords = [(600, 2000), (550, 100), (2600, 1400), (2600, 300)]
for coord in coords:
hole_pos = Point(coord[0], self.top - coord[1], 'mils')
hole = MountingHole(position=hole_pos, mode='CENTER')
self.pcb.add(hole)