Technical data

FLI and PLI tracing

ModelSim EE/PLUS Reference Manual VHDL Foreign Language Interface and Verilog PLI

489

Replayin

a Verilo

PLI session

To replay the C files, compile

mti_top_<tag>.c

as appropriate for the platform

you are working on, as for any PLI code, and set the Veriuser line in your

modelsim.ini

file to point to the appropriate resulting object file.

Since the foreign interface tracing is preliminary, there may be cases in which you

need to hand edit some C files to compile or run properly. An example is when

you have a design with more than one PLI object file. In that case, the original run

will make multiple calls to init_usertfs() functions. For replay, everything is

combined into one object file, so only one call will be made. If you merge the

separate cases in the top level routine (in

mti_top_<tag>.c

), all the initializations

will be done properly in one init_usertfs() callback.

Invoke

vsim

(p91) on the original design with the option:

-trace_foreign 16

Sometimes it is useful to create a trace of the replay in order to debug problems

with the replay itself. To do that, use one of the following:

-trace_foreign 17

-trace_foreign 18

-trace_foreign 19

The actions of the original PLI function will be replayed as a result.