extracting data from uvm_do_with macro

[assafgedalia]

Hello,

 

let's say i have a sequence, in this sequence i'm reading data using the uvm_do_with macro.

an example would be a read transaction in an APB agent.

 

how do i extract the data from it?

 

PARTIAL CODE:

 

    virtual task  body();

        apb_item#(AW, DW) it;

 

        case(op_kind)

            `APB_READ: begin

                `uvm_do_with(it,

                    {

                    it.address == tr_address;

                    it.rw          == op_kind;

                    }

                );// `uvm_do_with

            end

 

        endcase

 

    endtask: body

 

Thx,

Assaf

 

[tudor.timi]

For a read transfer, it's your driver's job to fill the data field (I'm assuming you have one) of the item with the value present on the PRDATA bus. This way you know that once your item is finished (i.e. you return from `uvm_do_*(...)) you rely on the contents of it.data. I don't really see why you need the case statement in there, though.

[assafgedalia]

Thanks for the answer.

 

i'm using a VIP that is `protected so i don't have access to the driver.

all i can do is create a sequence and "feed" it to the driver, inside the sequence i use the code i attached in my previous post.

(the case is there because there is also a write option which i omitted)

 

isn't the transaction deleted at the end of the uvm_do_with? otherwise can i use something like this:

 

 

class sequence;

int data;

virtual task  body();

        apb_item#(AW, DW) it;

        `uvm_do_with(it,

             {

             it.address == tr_address;

             it.rw          == op_kind;

             }

        );// `uvm_do_with

        this.data = it.data;

    endtask: body

endclass

 

and then read it from the higher hierarchy the creates the sequence and "feeds" it to the driver?

 

Thx,

Assaf

[tudor.timi]

The item doesn't get deleted after the call to `uvm_do. If the VIP updates data, then your code should work.

[assafgedalia]

ok thanks