Strategy to monitor single signals

UVM
, ,
2

In reply to mago1991:

this is actually a good point. Generally speaking interrupts are managed using some EN register which are the cleared by HW. irrespective of this they are all clocked operation anyway. One solution could be:


  if(register.enable.value == '1) begin
    $display("interrupt enalble waiting for being served")
    fork
      begin: intwait
        served = 0;
    	wait(register.enable.value == 0); // Do not use empty function here
        served = 1;
      end
      begin: timeout
        // your timeout based on clk
        served = 0;
      end
    join_any
    
    // Exit
    if(!served) disable intwait;
    else 		disable timeout;
  end

Frankly in this solution you should carefully set up the timeout to a reasonable value.

alternatively an interrupt signal has a positive and negative edge so you could use:



wait(your_signal == 1);
$display("interrupt enable");
wait(your_signal == 0);
$display("Interrupt served");

or again simply use the:

  always @(posedge interrupt) begin
    @(negedge interrupt )
    // ...

a task into an interface will be useful as well. Regards