Using DPI C++ with modelsim

meir · Apr 7, 2013

I'm trying to call a c++ function from SV code using DPI.
I'm running ModelSim under windows and am using MinGW g++ compiler.
compiling C++ code with:

Code:

 g++ -shared -Bsymbolic -o import.dll import.cpp

(from windows cmd line)
from modelsim running:

Code:

vsim -sv_lib import work.tb

result :

# Loading .\import.dll
# ** Error: (vsim-3193) Load of ".\import.dll" failed: DLL dependent library not found.

What am I doing wrong ?

dave_59 · Apr 8, 2013

Which version of Modelsim and Windows are you using? are they both 32-bit or 64-bit?

meir · Apr 9, 2013

windows 7 32 bit, modelsim ALTERA STARTER EDITION 10.1b

I have tried to link to .dll file also for c file with a simple void print_hello() function.
If I compile with :

Code:

vlog tb.sv import.c

and run:

Code:

 vsim work.tb

than "hello" is printed in the transcript window
BUT if import.dll is created and I run:

Code:

vsim work.tb -sv_lib import

then it seems that the simulator "finds" the function in .dll but I don't get any printout in the transcript window.

Appended
If veriuser.h included and (PLI ?) function of io_printf() used insted of printf() the string is printed in the transcript window.
Is this the correct solution ?

Using DPI C++ with modelsim

meir

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dave_59

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meir

meir

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Using DPI C++ with modelsim

meir

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