UVM driver communication to sequencer

UVM
,
1

Hi

I am having a doubt in the driver communicating the response back to sequencer through the seq_item_port.item_done (rsp) but how does this rsp is implemented in sequence body task,can anybody explain with one example?

I have checked the Cookbook Driver/Sequence API but things are not clear
.
Thanks
Taahir

2

In reply to syed taahir ahmed:

Hi
I am having a doubt in the driver communicating the response back to sequencer through the seq_item_port.item_done (rsp) but how does this rsp is implemented in sequence body task,can anybody explain with one example?
I have checked the Cookbook Driver/Sequence API but things are not clear
.
Thanks
Taahir

Can anybody explain how set_item_done(rsp) is implemented in Sequence?

3

In reply to syed taahir ahmed:

  1. Use seq_item_port.put(rsp) in driver after the item done, and use get_response(rsp) in sequence after finish item.

  2. or if you are assigning $cast(req,rsp) rsp handle to req handle, then without using get/put method, u will get automatically req handle (replica of rsp object) in sequence after finish item.

Regards,
Deepak

4

In reply to Deepak Ameta:

In reply to syed taahir ahmed:

  1. Use seq_item_port.put(rsp) in driver after the item done, and use get_response(rsp) in sequence after finish item.
  2. or if you are assigning $cast(req,rsp) rsp handle to req handle, then without using get/put method, u will get automatically req handle (replica of rsp object) in sequence after finish item.
    Regards,
    Deepak

Hi Deepak,

Thanks.
I m pasting pseudo code ,please me if iam wrong

task run_phase(uvm_phase);
…
//Driver Code
seq_item_port.get_next_item(seq_item);
task drive(…);
seq_item_port.item_done();
seq_item_port.put(rsp);

endtask

//Sequence Code

task body();

//…creating the sequence_item

start_item(tx);
assert(tx.randomize());
finsih_item(tx);

get_response(rsp);

endtask