UVM scoreboard to check with c/c++ golden model via uvm analysis port

1.systemverilog DPI interface to interconnect the c/c++ part and systemverilog part

2.uvm analysis port to valid event channel

// golden cehck via uvm analysis port
// ps : the port should be connected to it's callback module. that uvm can collected.
// ex: item_port.connect( analysis_export );

uvm_analysis_port item_port

// DPI import ... for our golen model
import "DPI" void *yuv2rgb(int unsigned y, int unsigned u, int unsigned v);  
// yub2rgb(void* trx); using ptr is a more friendly interface....
import "DPI" void *rgb2yuv(int unsigned r, int unsigned g, int unsigned b); 

// callback func called from callable func/module
task callback(sample_trx trx);

  assert(trx!=null);
  if (trx.type == YUV2RGB)
    dpi_c_yuv2rgb(trx);
  else
    dpi_c_rgb2yuv(trx);

endtask

void dpi_c_yuv2rgb(sample_trx trx);
                                                                                                                                                                                    
  assert(trx!=null);
  c_rst = yuv2rgb(trx.y, trx.u, trx.v)
  assert( c_rst.r == trx.r &
          c_rst.g == trx.g &
          c_rst.b == trx.b);
endtask