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Python API
This module communicates with CouchDB to fetch schematics, and generate SPICE netlists out of them.
Basic usage:
async with SchematicService("http://localhost:5984/offline") as service:
name = "top$top"
seq, docs = await service.get_all_schem_docs(name)
print(spice_netlist(name, docs))
The sequence number can later be used to efficiently update the netlist with update_schem.
For live updates, use live_schem_docs.
class StatusError(ClientError)Non-200 response
class SchematicService(AbstractAsyncContextManager)A context manager for getting schematics from a CoucdDB database
def __init__(url)Create a HTTP session with the given database URL
async def dbget(path, **kwargs)Do a GET request to the given database endpoint and query parameters
async def dbpost(path, json, **kwargs)Do a POST request to the given database endpoint, JSON data, and query parameters
async def dbstream(path, json, **kwargs)Stream data from the given database endpoint, JSON data, and query parameters
async def get_docs(name)Get all the documents with the specified schematic ID
async def get_all_schem_docs(name)Recursively get all the documents of the specified schematic and all the subcircuits inside it. And all the model definitions. Returns a sequence number and a dictionary of schematic ID: documents.
async def update_schem(seq, schem)Take a sequence number and dictionary as returned by get_all_schem_docs and update it.
async def live_schem_docs(name)A live stream of updated dictionaries, as returned by get_all_schem_docs
def netlist(docs, models)Turn a collection of documents as returned by get_docs into a netlist structure.
Returns a dictionary of device ID: {port: net}
Usage:
async with SchematicService("http://localhost:5984/offline") as service:
name = "top$top"
seq, docs = await service.get_all_schem_docs(name)
print(netlist(docs[name], models))
def spice_netlist(name, schem, extra="", corner='tt', temp=None, **params)Generate a spice netlist, taking a dictionary of schematic documents, and the name of the top level schematic. It is possible to pass extra SPICE code and specify the simulation corner.
This module handles communication with a simulation server. The underlying protocol is described in https://github.com/NyanCAD/SimServer/blob/main/Simulator.capnp
Basic usage of this module:
con = await connect("localhost", simulator=Xyce)
fs = loadFiles(con, "test.cir")
res = fs.commands.run(["V(*)", "I(*)"])
print(await readAll(res))
For streaming plots, have a look at holoviews.streams.Buffer and https://holoviews.org/user_guide/Streaming_Data.html.
async def connect(host, port=5923, simulator=Ngspice, autostart=True)Connect to a simulation server at the given host:port,
which should be a simulator such as Ngspice or Xyce.
If host is set to "localhost" and no server is running,
we will attempt to start one automatically,
unless autostart=False.
def loadFiles(sim, *names)Load the specified filenames into the simulation server. The first file is the entrypoint for the simulator. Returns a handle to run simulation commands on.
For in-memory data, directly call sim.loadFiles.
The data should be of the form [{"name": name, "contents": contents}]
For files already present on the simulator use sim.loadPath.
async def read(response, io=stdout)Read one chunk from a simulation command
async def stream(response,
streamdict,
newkey=lambda k: None,
io=stdout,
suffix="")Stream simulation data into a Buffer (DataFrame)
streamdict is a dictionary, where Buffers are added as needed.
This is done because some simulation commands have multiple results.
The newkey function is called when a new Buffer is added.
Additionally, a custom "file-like" object can be passed for logging, and a suffix can be passed that is appended to the dictionary key.
async def readAll(response, io=stdout, suffix="")Read all the simulation data from a simulation command.