eldo_user

Specifying Simulation Output
Plotting, Printing and Probing
Plotting, Printing and Probing
This section describes the types of output files generated by Eldo when plotting, printing and
probing. It refers to the main three commands .PLOT, .PRINT, and .PROBE, even when
generically referring to plotting.
Files Created. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
Types of Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
Monitoring of Hierarchical Nodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
Using Wildcards for Plotting and Probing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310
Plotting, Printing and Probing States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313
Plotting Internal Pin Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314
Complex Modifiers and Initial Formatting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314
Compound Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
Plotting an Analog Signal as a Digital Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
X-Axis of Waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316
Tabular Listing Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317
Plotting Transmission Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317
Files Created
The quantities listed in a .PLOT command are written to binary output files (.wdb) for viewing
with the EZwave waveform viewer. Saved windows files .swd are created with a .wdb database
and contain information on specific graph windows such as size or position. By default, the
quantities listed in a .PLOT command are not written to the ASCII .chi output file. This avoids
creating huge .chi output files in the case of large simulations.
Eldo generates .wdb by default, however other formats can be generated. See “Output Files
Generated” on page 358.
When using .PRINT, simulation results are written to the .chi log file in ASCII format. When
using .PROBE, the set of signals to be monitored is specified in the same way, but results are
written to binary output files (.wdb) meaning the simulated results are available for postprocessing.
Binary storage saves significant disk space and is faster to read/write than ASCII.
.PROBE and .PLOT both dump waves to a database but .PLOT also adds some information for
“plot combinations,” which means the ability to group waves into graphs, use Smith charts, and
change wave representation (scattered, histogram, and so on).
Related Topics
Plotting, Printing and Probing
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Eldo® User's Manual, 15.3