Source code for ihp.cells2.utils
import os
import gdsfactory as gf # to have gf.Component
import pya # KLayout Python API
from cni.dlo import PCellWrapper # to wrap the PyCell
from cni.tech import Tech # to get the technology
[docs]
def generate_gf_from_ihp(cell_name, cell_params, function_name) -> gf.Component:
# ----------------------------------------------------------------
# Step 1: Get the technology object
# ----------------------------------------------------------------
tech = Tech.get("SG13_dev") # Must match the name registered in SG13_Tech
# ----------------------------------------------------------------
# Step 2: Create a layout and a cell
# ----------------------------------------------------------------
layout = pya.Layout() # new empty layout
cell = layout.create_cell(cell_name) # new cell for your transistor
# ----------------------------------------------------------------
# Step 3: Wrap the PyCell
# ----------------------------------------------------------------
# PCellWrapper acts like the 'specs' object in KLayout
# It handles parameter declarations and calls defineParamSpecs internally
device = PCellWrapper(impl=function_name, tech=tech)
# Convert params into a list in the order of device.param_decls
param_values = [cell_params[p.name] for p in device.param_decls]
# ----------------------------------------------------------------
# Step 4: Produce the layout
# ----------------------------------------------------------------
device.produce(
layout=layout,
layers={}, # can pass layer map if needed
parameters=param_values,
cell=cell,
)
# ----------------------------------------------------------------
# Step 5: Bring to GDSFactory
# ----------------------------------------------------------------
layout.write("temp.gds")
print(f"{cell_name} PyCell placed successfully and GDS written.")
c = gf.read.import_gds(gdspath="temp.gds")
os.remove("temp.gds")
# ----------------------------------------------------------------
return c
def add_port_group(c: gf.component, ref, ports: list, prefix: str = ""):
"""
Add a group of ports from a reference component to a target component,
optionally renaming them with a prefix.
Parameters
----------
c : gf.Component
The component to which the ports will be added.
ref : gf.ComponentReference or similar
The referenced component from which ports are copied.
ports : list of str
A list of port names to copy from `ref` to `c`.
prefix : str, optional
A string to prepend to each added port's name, by default "".
Returns
-------
gf.Component
The updated component `c` with the copied ports added.
Notes
-----
- Each port in `ports` must exist in `ref.ports`.
- Port objects are not deep-copied; the function attaches the same
`ref.ports[p]` objects to `c` under new names.
"""
for p in ports:
c.add_port(name=prefix + p, port=ref.ports[p])
return c
def change_port_orientation(c: gf.component, ports, orientation: int):
"""
Change the orientation value of one or more ports in a component.
Parameters
----------
c : gf.Component
The component whose port orientations will be modified.
ports : iterable of str
Names of the ports in `c` whose orientation should be updated.
orientation : int
The new orientation angle (in degrees) to assign to each port.
Returns
-------
gf.Component
The updated component `c` with modified port orientations.
Notes
-----
- Each port name in `ports` must exist in `c.ports`.
- Orientation is typically one of {0, 90, 180, 270} in gdsfactory
conventions, but arbitrary integer angles are allowed.
"""
for p in ports:
c.ports[p].orientation = orientation
return c
