NOTE: All delay calculation related parts have been moved to ToyDelay
Voltage: Vname N+ N- value/pwl(t v t v ...)
Current: Iname N+ N- value/pwl(t v t v ...)
Resistor: Rname N+ N- value
Capacitor: Cname N+ N- value
Inductor: Lname N+ N- value
VCVS: Ename N+ N- NC+ NC- Value
VCCS: Gname N+ N- NC+ NC- Value
CCVS: Hname N+ N- NC+ NC- Value
CCCS: Fname N+ N- NC+ NC- Value
.tran [name] tstep tstop: Specifies simulation time step and total simulation time. The name is useful when you would like to run the simulation on the same circuit with different options. name part is optional.
.option [name] method=euler: Specifies the method used to perform numerical integration. Valid methods are euler (backward Euler), gear2 (Gear2 or BDF2) and trap (trapezoidal method).
.pz [name] V(OUT) I(IN): Perform pole-zero analysis, and calculate pole-residual values for specified output node, and driver admittance at IN node. (The driver admittance part is still under development.)
.option [name] pzorder=N will be added, where the N means at most N pairs of poles and zeros will be calculated and used to approximate the output waveform.
.debug [module] 1: Enable debug output. This command now supports enable debug information for specified modules only, if module is omitted, debug information for all modules are enabled. Valid module names are all for enabling all modules, root for root solver, sim for transient simulation, circuit for circuit building, pz for pole-zero analysis.
.plot tran [width=xx height=xx canvas=xxx] [name.]V(NodeName) [name.]I(DeviceName): Generate a simple ASCII plot in terminal for easier debugging. If width and height directives are not given, the tool will use current terminal size for plot width and height. Multiple simulation results can be plotted in a single chart by specifying a canvas name. Currently at most 4 plots can be drawn in one canvas. Now the command can plot data from different analysis data into one canvas, specified with name. prefix. (This command is not supported in PZ analysis.)
.measure tran[.name] variable_name trig V(node)/I(device)=trigger_value TD=xx targ V(node)/I(device)=target_value: Measure the event time between trigger value happend and target value happend. (This command is not supported in PZ analysis.)
git clone --recurse-submodules and make should be sufficient. The executable is generated under current code directory and named "trans".
To run, just give the executable the spice deck you want to simulate.
./trans circuit/rc.cir gives the exponential curve of a capacitor being charged, as well as an example for .measure commands.
./trans circuit/lc.cir produces a oscillation curve of an LC circuit.
./trans circuit/xtalk.cir gives an example of the voltage curve of a capacitor with an aggressor toggling beside it, as well as the canvas-ed .plot command.
./trans circuit/network.cir gives an example of simulation of a larger RC network.
The output tr0 format still cannot be recognized by waveform viewer tools, not sure where the problem is.