Calling Sequneces from within a sequence

[abhishekyadav123]

Hi All UVM Geeks,

Guys I came across with a statement that says - "UVM sequences can call other sequences".

I think that simply means - Few simple sequences can be used to compose complex sequences.

Somehow, I m not able to find an example which can actually demonstrate this behavior.

Can some one explain how this can be done.

Regards,

Abhishek

[dave_59]

See

http://verificationacademy.com/uvm-ovm/Sequences/Virtual

and

http://www.mentor.com/products/fv/events/sequence-layering

[abhishekyadav123]

Thanks Dave,

Thanks for the quick reply.

I don't have access to the verification academy link.

Also the video link on sequence layering was not working for me either.

[uwes]

hi,

maybe its too simple :-) uvm_do* does items and sequences ...

/uwe

class simple_seq_do extends uvm_sequence #(simple_item);

 function new(string name="simple_seq_do");
   super.new(name);
 endfunction

 `uvm_object_utils(simple_seq_do)    

 virtual task body();
   `uvm_info(get_name(), $sformatf("In body() of %s", get_name()),1000)
   `uvm_do(req)
 endtask

endclass : simple_seq_do



class simple_seq_sub_seqs extends uvm_sequence #(simple_item);

 function new(string name="simple_seq_sub_seqs");
   super.new(name);
 endfunction

 `uvm_object_utils(simple_seq_sub_seqs)    

 simple_seq_do seq_do;

 virtual task body();
   `uvm_info(get_name(), $sformatf("In body() of %s", get_name()),1000)
   #100;
   `uvm_do(seq_do)
 endtask

endclass : simple_seq_sub_seqs

EDIT: uvm_sequence_utils are deprecated - changed to uvm_object_utils

Edited September 30, 2011 by uwes

[abhishekyadav123]

Thanks,

This is exactly what I was looking for.