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how to use verilog PLI communicate with c by ncverilog compiler

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u24c02

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I would like to communicate c with verilog. I find the Verilog PLI can solve my problem. I read this website to learn

https://www.asic-world.com/verilog/pli1.html#How_it_Works*

But I still can't work even a printf function. I use ncverilog for verilog compiler. What I done is below. I can't have a successful compile for this. It says that it can't find the function. Can anyone tell me how to solve my problem. thanks =)

Code Verilog - [expand]
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C code: hello.c
 
#include<stdio.h> void hello(){ printf("HELLO"); }
 
make library:
 
gcc hello.c -fPIC -shared -o hello.so
 
verilog code: test.v
 
module test(); initial begin $hello; $10 $finish; end endmodule
 
verilog command:
 
ncverilog test.v +access+r -v hello.so




Update

I've got an error.
One of the error is
hello_vpi.c :
"vpi_user.h No such file or directory"
hello_vpi.c 12 :
error 's_vpi_systf_data'undeclared(first use in this function) ....

What should I for solving?
 
Last edited by a moderator:

It is a standard file included in ncverilog installation. Please include that path with -I option and it'll take care of this error.

bests.
Has
https://amzn.to/2tP6lBi
 

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