Sharing multiple sequence items on a common driver in UVM

[omahesh]

Hi,

I've multiple sequence items and I'm trying to share a common driver for all sequence items.

Usually in UVM; I have the following driver model;

class common_driver extends uvm_driver#(abc_seq_item);

.............

endclass

Like the above model, I want to share multiple sequence_items in a common driver.

Another thing to remember is; If i run one testcase then only one corresponding sequence_item should be driven by the driver.

If it possible please suggest me the ways to implement it?

regards,

Mahesh.

[whiteriver]

One way is to create a base sequence item and then create extensions of it:

class base_packet extends uvm_sequence_item;

class specific_packet extends base_packet;

then the driver uses the base class, even if the sequence is running with the specific_class:

class this_driver extends uvm_driver #(base_packet);

class sequence_one extends uvm_sequence#(base_packet);

class sequence_two extends uvm_sequence#(specific_packet);