Delaying the start of scoreboard

UVM
1

I am trying to make APB VIP.
However I am stuck at scoreboard-
The idea is to delay the scoreboard start until the monitor has sent all the transactions (5 writes, 5 reads) to Scoreboard.
I tried the Delay method in run phase and it’s working fine but I want something which can be true for every test.
Is there a way to check the last transaction in sequence or monitor and then trigger an event from there to start the scoreboard ?
Thanks,
SR

MONITOR:

task run_phase(uvm_phase phase);
	apb_transaction apb_tx_mon;
 
forever begin
	apb_tx_mon = apb_transaction::type_id::create("apb_tx_mon", this);
 
	@(posedge apb_vin.clk)
	begin
 
		if (apb_vin.penable)
 
		begin
			apb_tx_mon.paddr 	= apb_vin.paddr;
			apb_tx_mon.pwdata	= apb_vin.pwdata;
			apb_tx_mon.pwrite	= apb_vin.pwrite;
			if (!apb_vin.pwrite) begin
		#1;	apb_tx_mon.prdata	= apb_vin.prdata;
 
		end
			`uvm_info("MONITOR", "CALLING WRITE METHOD", UVM_MEDIUM);
			apb_mon_ap.write(apb_tx_mon);
 
	end
	end
end

SCOREBOARD:

task run();
#420;
	int i;
	i= sb_fifo.used();
 
	while(sb_fifo.used() != 0) 
begin
	`uvm_info("SCOREBOARD", $sformatf("fifo size: %0d ", sb_fifo.used()), UVM_MEDIUM);	
	sb_fifo.get(apb_tx);
  
	//`uvm_info("SCOREBOARD_PRINT", $sformatf("paddr=%0d, prdata=%0d, pwdata=%0d, pwrite=%0d", apb_tx.paddr, apb_tx.prdata, apb_tx.pwdata, apb_tx.pwrite), UVM_MEDIUM);
		if (!apb_tx.pwrite)
		begin
 
		`uvm_info("SCOREBOARD", $sformatf("pwrite= %0d", apb_tx.pwrite ), UVM_MEDIUM);
		compare(apb_tx);
 
		end
		else 
			write_box.put(apb_tx);
	end[.](https://verificationacademy.com)
 
endtask
2

In reply to mrlee:

You should never have to delay the start of your scoreboard. The get() method of the uvm_tlm_analysis_fifo is blocking, so your scoreboard should block until it receives an item in the appropriate fifos.

3

In reply to cgales:

In addition what Chuck is saying. Your monitor might publish transactions which are not relevant, i. e. extracted when no useful response is available.
Make your monitor sending out only useful responses.