def set_resistance(r):
"""
Sets the resistance of this resistor to be the string |r|, after
appropriately modifying it.
"""
if not r:
self.board.display_message('No resistance entered', ERROR)
return
try:
old_r = self.get_resistance()
new_r = resistance_to_string(resistance_from_string(r))
do = lambda: _set_resistance(new_r)
undo = lambda: _set_resistance(old_r)
do()
self.board.set_changed(True, Action(do, undo, 'set_resistance'))
except Exception as e:
self.board.display_message(e.message, ERROR)
def draw_on(self, canvas, offset=(0, 0)):
ox, oy = offset
w, h = self.width, self.height
self._resistor_zig_zags = draw_resistor_zig_zags(canvas, ox, oy, w, h)
self.parts |= self._resistor_zig_zags
text = resistance_to_string(resistance_from_string(self.init_resistance))
if w > h: # horizontal
self.resistor_text = canvas.create_text(ox + w / 2,
oy - RESISTOR_TEXT_PADDING, text=text, font=FONT)
else: # vertical
self.resistor_text = canvas.create_text(ox + w + RESISTOR_TEXT_PADDING +
8, oy + h / 2, text=text, font=FONT)
self.parts.add(self.resistor_text)
def get_resistance():
"""
Returns the string representing this resistor's resistance.
"""
return canvas.itemcget(self.resistor_text, 'text')
self.get_resistance = get_resistance
def _set_resistance(r):
canvas.itemconfig(self.resistor_text, text=r)
self.init_resistance = r
def set_resistance(r):
"""
Sets the resistance of this resistor to be the string |r|, after
appropriately modifying it.
"""
if not r:
self.board.display_message('No resistance entered', ERROR)
return
try:
old_r = self.get_resistance()
new_r = resistance_to_string(resistance_from_string(r))
do = lambda: _set_resistance(new_r)
undo = lambda: _set_resistance(old_r)
do()
self.board.set_changed(True, Action(do, undo, 'set_resistance'))
except Exception as e:
self.board.display_message(e.message, ERROR)
self.set_resistance = set_resistance
def run_analysis(board, analyze, solve_circuit=False,
ensure_pwr_gnd_nodes=False, no_shorts=False, ensure_signal_files=False):
"""
Extracts a Circuit object from what is drawn on the given |board| and calls
the given function |analyze| on it. The funtion |analyze| should take as
arguments the circuit, as well as the plotters that are collected.
"""
# remove current message on board, if any
board.remove_message()
# components in the circuit
circuit_components = []
# analysis plotters
plotters = []
# probe labels
probe_plus, probe_minus = None, None
# constants for motors, motor_pots, and photosensors
# we use this state to be able to identify robot head groups
head_connector_group_ids = set()
n_motor_plus = defaultdict(str)
n_motor_minus = defaultdict(str)
i_motor = defaultdict(str)
motor_label = defaultdict(str)
n_motor_pot_top = defaultdict(str)
n_motor_pot_middle = defaultdict(str)
n_motor_pot_bottom = defaultdict(str)
i_motor_pot_top_middle = defaultdict(str)
i_motor_pot_middle_bottom = defaultdict(str)
motor_pot_label = defaultdict(str)
n_photo_left = defaultdict(str)
n_photo_common = defaultdict(str)
n_photo_right = defaultdict(str)
i_photo_left_common = defaultdict(str)
i_photo_common_right = defaultdict(str)
photo_lamp_angle_signal = defaultdict(str)
photo_lamp_distance_signal = defaultdict(str)
photo_label = defaultdict(str)
# constants for robot power and robot analog inputs and outputs
robot_connector_group_ids = set()
robot_pwr = defaultdict(str)
robot_gnd = defaultdict(str)
robot_power_label = defaultdict(str)
robot_ai1 = defaultdict(lambda: (None, None))
robot_ai2 = defaultdict(lambda: (None, None))
robot_ai3 = defaultdict(lambda: (None, None))
robot_ai4 = defaultdict(lambda: (None, None))
robot_ao = defaultdict(lambda: (None, None))
# first identify all power and ground nodes and use the same name for all
# power nodes, as well as the same name for all ground nodes
power_nodes, ground_nodes = set(), set()
for drawable in board.get_drawables():
# wires attached to this component
nodes = [wire.label for wire in drawable.wires()]
# power component
if isinstance(drawable, Power_Drawable):
for node in nodes:
power_nodes.add(node)
# ground component
elif isinstance(drawable, Ground_Drawable):
for node in nodes:
ground_nodes.add(node)
# robot connector component
elif isinstance(drawable, Robot_Power_Drawable):
for node in [wire.label for wire in drawable.pwr.wires()]:
power_nodes.add(node)
for node in [wire.label for wire in drawable.gnd.wires()]:
ground_nodes.add(node)
robot_connector_group_ids.add(drawable.group_id)
robot_pwr[drawable.group_id] = POWER
robot_gnd[drawable.group_id] = GROUND
robot_power_label[drawable.group_id] = drawable.label
# ensure that there is at least one power component
if ensure_pwr_gnd_nodes and not power_nodes:
board.display_message('No power nodes', ERROR)
return
# ensure that there is at least one ground component
if ensure_pwr_gnd_nodes and not ground_nodes:
board.display_message('No ground nodes', ERROR)
return
# ensure that power nodes and ground nodes are disjoint (no short circuit)
if no_shorts and power_nodes.intersection(ground_nodes):
board.display_message('Short circuit', ERROR)
return
# add voltage source to circuit
circuit_components.append(Voltage_Source(POWER, GROUND, current_name(
board, POWER, GROUND), POWER_VOLTS))
def maybe_rename_node(node):
"""
If this |node| is a power node or a ground node, this method returns the
appropriate unique name, otherwise the original name is returned.
"""
if node in power_nodes:
return POWER
elif node in ground_nodes:
return GROUND
return node
for drawable in board.get_drawables():
# wires attached to this component
nodes = [wire.label for wire in drawable.wires()]
# probe plus component
if isinstance(drawable, Probe_Plus_Drawable):
if nodes:
probe_plus = maybe_rename_node(nodes[0])
circuit_components.append(Probe('+', probe_plus))
# probe minus component
elif isinstance(drawable, Probe_Minus_Drawable):
if nodes:
probe_minus = maybe_rename_node(nodes[0])
circuit_components.append(Probe('-', probe_minus))
# resistor component
elif isinstance(drawable, Resistor_Drawable):
connector_it = iter(drawable.connectors)
pin_1_nodes = [wire.label for wire in connector_it.next().wires()]
pin_2_nodes = [wire.label for wire in connector_it.next().wires()]
# get its resistance
try:
c1, c2, e = resistance_from_string(drawable.get_resistance())
r = (c1 * 10 + c2) * 10 ** e
except:
board.display_message('Could not obtain resistance constant', ERROR)
return
n1 = maybe_rename_node(pin_1_nodes[0]) if pin_1_nodes else None
n2 = maybe_rename_node(pin_2_nodes[0]) if pin_2_nodes else None
resistor = Resistor(n1, n2, current_name(drawable, n1, n2), r)
resistor.label = drawable.label
circuit_components.append(resistor)
# op amp component
elif isinstance(drawable, Op_Amp_Drawable):
plus_nodes = [wire.label for wire in drawable.plus_port.wires()]
minus_nodes = [wire.label for wire in drawable.minus_port.wires()]
out_nodes = [wire.label for wire in drawable.out_port.wires()]
na1 = maybe_rename_node(plus_nodes[0]) if plus_nodes else None
na2 = maybe_rename_node(minus_nodes[0]) if minus_nodes else None
nb1 = maybe_rename_node(out_nodes[0]) if out_nodes else None
nb2 = GROUND
op_amp = Op_Amp(na1, na2, current_name(drawable, na1, na2), nb1, nb2,
current_name(drawable, nb1, nb2), jfet=drawable.jfet)
op_amp.label = drawable.label
circuit_components.append(op_amp)
# pot component
elif isinstance(drawable, Pot_Drawable):
if ensure_signal_files and not drawable.signal_file:
board.display_message('No signal file loaded for Pot', ERROR)
return
pot_variables = {'pot_r': None, 'pot_signal': None}
if drawable.signal_file:
execfile(drawable.signal_file, pot_variables)
if ensure_signal_files and not (pot_variables['pot_r'] and
pot_variables['pot_signal']):
board.display_message('Invalid Pot signal file', ERROR)
return
top_nodes = [wire.label for wire in drawable.top_connector.wires()]
middle_nodes = [wire.label for wire in drawable.middle_connector.wires()]
bottom_nodes = [wire.label for wire in drawable.bottom_connector.wires()]
n_top = maybe_rename_node(top_nodes[0]) if top_nodes else None
n_middle = maybe_rename_node(middle_nodes[0]) if middle_nodes else None
n_bottom = maybe_rename_node(bottom_nodes[0]) if bottom_nodes else None
pot = Signalled_Pot(n_top, n_middle, n_bottom, current_name(drawable,
n_top, n_middle), current_name(drawable, n_middle, n_bottom),
pot_variables['pot_r'], pot_variables['pot_signal'])
pot.label = drawable.label
circuit_components.append(pot)
plotters.append(Signalled_Pot_Plotter(pot))
# motor component
elif isinstance(drawable, Motor_Drawable):
plus_nodes = [wire.label for wire in drawable.plus.wires()]
minus_nodes = [wire.label for wire in drawable.minus.wires()]
plus_node = maybe_rename_node(plus_nodes[0]) if plus_nodes else None
minus_node = maybe_rename_node(minus_nodes[0]) if minus_nodes else None
i = current_name(drawable, n_motor_plus, n_motor_minus)
if not drawable.group_id:
motor = Motor(plus_node, minus_node, i)
motor.label = drawable.label
circuit_components.append(motor)
plotters.append(Motor_Plotter(motor))
else:
head_connector_group_ids.add(drawable.group_id)
n_motor_plus[drawable.group_id] = plus_node
n_motor_minus[drawable.group_id] = minus_node
i_motor[drawable.group_id] = i
motor_label[drawable.group_id] = drawable.label
# motor pot component
elif isinstance(drawable, Motor_Pot_Drawable):
pot_top_nodes = [wire.label for wire in drawable.top.wires()]
pot_middle_nodes = [wire.label for wire in drawable.middle.wires()]
pot_bottom_nodes = [wire.label for wire in drawable.bottom.wires()]
head_connector_group_ids.add(drawable.group_id)
n_motor_pot_top[drawable.group_id] = (maybe_rename_node(pot_top_nodes[0])
if pot_top_nodes else None)
n_motor_pot_middle[drawable.group_id] = maybe_rename_node(
pot_middle_nodes[0]) if pot_middle_nodes else None
n_motor_pot_bottom[drawable.group_id] = maybe_rename_node(
pot_bottom_nodes[0]) if pot_bottom_nodes else None
i_motor_pot_top_middle[drawable.group_id] = current_name(drawable,
n_motor_pot_top, n_motor_pot_middle)
i_motor_pot_middle_bottom[drawable.group_id] = current_name(drawable,
n_motor_pot_middle, n_motor_pot_bottom)
motor_pot_label[drawable.group_id] = drawable.label
# photosensor component
elif isinstance(drawable, Photosensors_Drawable):
if ensure_signal_files and not drawable.signal_file:
board.display_message('No signal file loaded for Photosensors', ERROR)
return
lamp_signals = {'lamp_angle_signal': None, 'lamp_distance_signal': None}
if drawable.signal_file:
execfile(drawable.signal_file, lamp_signals)
photo_lamp_angle_signal[drawable.group_id] = lamp_signals[
'lamp_angle_signal']
photo_lamp_distance_signal[drawable.group_id] = lamp_signals[
'lamp_distance_signal']
photo_left_nodes = [wire.label for wire in drawable.left.wires()]
photo_common_nodes = [wire.label for wire in drawable.common.wires()]
photo_right_nodes = [wire.label for wire in drawable.right.wires()]
head_connector_group_ids.add(drawable.group_id)
n_photo_left[drawable.group_id] = (maybe_rename_node(photo_left_nodes[0])
if photo_left_nodes else None)
n_photo_common[drawable.group_id] = maybe_rename_node(
photo_common_nodes[0]) if photo_common_nodes else None
n_photo_right[drawable.group_id] = maybe_rename_node(
photo_right_nodes[0]) if photo_right_nodes else None
i_photo_left_common[drawable.group_id] = current_name(drawable,
n_photo_left, n_photo_common)
i_photo_common_right[drawable.group_id] = current_name(drawable,
n_photo_common, n_photo_right)
photo_label[drawable.group_id] = drawable.label
# motor analog i/o component
elif isinstance(drawable, Robot_IO_Drawable):
node = maybe_rename_node(nodes[0]) if nodes else None
robot_connector_group_ids.add(drawable.group_id)
if drawable.name == 'Ai1':
robot_ai1[drawable.group_id] = (node, drawable.label)
elif drawable.name == 'Ai2':
robot_ai2[drawable.group_id] = (node, drawable.label)
elif drawable.name == 'Ai3':
robot_ai3[drawable.group_id] = (node, drawable.label)
elif drawable.name == 'Ai4':
robot_ai4[drawable.group_id] = (node, drawable.label)
elif drawable.name == 'Ao':
robot_ao[drawable.group_id] = (node, drawable.label)
# collect robot head pieces together
for group_id in head_connector_group_ids:
head_connector = Head_Connector(n_motor_pot_top[group_id],
n_motor_pot_middle[group_id], n_motor_pot_bottom[group_id],
i_motor_pot_top_middle[group_id], i_motor_pot_middle_bottom[group_id],
n_photo_left[group_id], n_photo_common[group_id], n_photo_right[
group_id], i_photo_left_common[group_id], i_photo_common_right[
group_id], n_motor_plus[group_id], n_motor_minus[group_id], i_motor[
group_id], photo_lamp_angle_signal[group_id],
photo_lamp_distance_signal[group_id])
head_connector.motor_label = motor_label[group_id]
head_connector.motor_pot_label = motor_pot_label[group_id]
head_connector.photo_label = photo_label[group_id]
circuit_components.append(head_connector)
plotters.append(Head_Plotter(head_connector))
# collect robot connector pieces together
for group_id in robot_connector_group_ids:
ai1_node, ai1_label = robot_ai1[group_id]
ai2_node, ai2_label = robot_ai2[group_id]
ai3_node, ai3_label = robot_ai3[group_id]
ai4_node, ai4_label = robot_ai4[group_id]
ao_node, ao_label = robot_ao[group_id]
robot_connector = Robot_Connector(robot_pwr[group_id], robot_gnd[group_id],
ai1_node, ai2_node, ai3_node, ai4_node, ao_node)
robot_connector.label = ','.join(filter(bool, [robot_power_label[group_id],
ai1_label, ai2_label, ai3_label, ai4_label, ao_label]))
circuit_components.append(robot_connector)
# if both probes are given, display probe voltage difference graph
if probe_plus and probe_minus:
plotters.append(Probe_Plotter(probe_plus, probe_minus))
# create and analyze circuit
circuit = Circuit(circuit_components, GROUND, solve_circuit)
board.relabel_wires(maybe_rename_node)
return analyze(circuit, plotters)