Can I use .o files of compiled c files and use that to compile SV files for DPI

SystemVerilog
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6

In reply to dave_59:

Hi Dave,

Thanks for your reply. I understood the concept and now able to do what I want.

But I faced few difficulties in calling SystemVerilog tasks from C functions to insert delay.

I am receiving Fatal error as below
Fatal: (vsim-3743) DPI task ‘import_task’ returned non-zero value indicating disable when thread was not disabled.

If I comment printf(" C: After calling export function\n"); of C_file.c then it works.
I am unable to execute the remaining lines of C function after calling SV task.

Below is the code that I am trying to run.

//C_file.c

extern int export_task(int *t);
int import_task(int *t)
{ 
  printf("C : Before calling export\n");
  export_task(t);
  printf(" C: After calling export function\n"); 
}

//SV_file.sv

program main; 
export "DPI-C" task export_task; 
import "DPI-C" context task import_task(output int t); 

int a;
task export_task(output int t); 
  $display("SV: Entered the export function . wait for some time : %0d ",$time); 
  #100 t = $stime;
  $display("SV: After waiting %0d",$time);
endtask 

initial 
begin 
  $display("SV: Before calling import function %0d",$time); 
  import_task(a);
  $display("SV: After calling import function A=%0d Time=%0d",a,$time); 
end 
endprogram

//Run commands

vlib work
vlog SV_file.sv C_file.c
vsim -c main -do "run -all; exit"