eldo_user

Eldo Conversion Utilities
Utility to Convert VCD to Test Vectors
Utility to Convert VCD to Test Vectors
A standalone utility vcd2tv can be used to convert VCD (Value Change Dump) stimuli into test
vectors. It is a simple format converter, and can be used independently for any simulator.
Output is in the test vector format. This utility can also be used to convert EVCD (extended
VCD) files. Note when converting from EVCD format: inout statements are converted to input
statements.
Usage
vcd2tv -i vcd_input_file [-io io_input_file] [-o tv_output_file]
[-hier] [-end_time conversion_end_time] [-case]
Arguments
• -i vcd_input_file
Input filename. Name of the VCD file to convert.
• -io output_file
Input/output filename. Name of the file containing the I/O definition (input or output).
• -o tv_output_file
Output filename. Name of the test vector file (.tv) to generate.
• -hier
When specified hierarchical node names are also converted. If not specified, only the top
level is converted.
• -end_time conversion_end_time
Conversion time limit (if not specified conversion is done until the end of the VCD file).
• -case
Enables the case sensitive treatment of signal names.
If this is not enabled, and the utility detects two signals with the same name except for the
case, a warning will be generated suggesting to enable case-sensitivity with the -case
argument. For example:
*** Warning:the following signals are merged because their names
differ only by the case. Please use -case option to enable case
sensitivity.
CLK
clk
Description
The ADiT Fast-SPICE simulator supports VCD directly because it internally converts it to test
vector format, transparently using the vcd2tv converter. Eldo is not able to read VCD, which is
why this utility is useful. It can be used for any simulator which can read test vectors but not
VCD.
Eldo® User's Manual, 15.3 1471