Extern "C" in C and C++

SystemVerilog
,
2

In reply to uvmbee:


 Here is a sample code :

module hello_kitty;
  
   export "DPI-C" task random_data;
 
   import "DPI-C" context task read_from_c();
  
  task read();
    read_from_c();
  endtask
  
  task random_data(output int rdata,int wdata);
    rdata = $urandom_range(0,20);
    wdata = $urandom_range(0,10);
    $display ("Randomized rdata = %d and wdata = %d",rdata,wdata);
  endtask
  
  
endmodule :hello_kitty


module test;
  hello_kitty h1();
  
  initial repeat(10)
	begin
	   h1.read;
  	    // this works too - no wrapper needed
           #500; // read every 
	end
  
endmodule


#include "stdio.h"
#include "svdpi.h"


extern int random_data(int*, int*);

int read_from_c(void)
{
  int hi;
  int hello;
  int x;
  x = random_data(&hi,&hello);
  printf ("rdata = %d, wdata = %d \n",hi,hello);
  return 0;
  
  
}