Randomize packet as well as interface signals

UVM
1

Hi,

My task is to randomize two different types of packets

Say Packet xyz,
Packet abc

and at the same time, I need to randomize the interface signals(valid, enable, data).
and need to drive these packets on one of the interface signals “data”.
What is the way to do this?

2

In reply to shankar_logic:

Never you randomize interface signals!
But you might have data fields reflecting the Control Signals in you sequence item/Transaction.
Regarding the data packets is it really differnt types og data packets or is it only different d packets of the same type?

3

Hi,

This problem got sorted out.

But, the problem is if I have different types of packets, how can i randomize it using single sequence.

For example, three sequence item class
Packet tx1
Packet tx2
Packet tx3

Now when i have to randomize them in the sequence i use the following statement

class seq extends uvm_sequence#(seq_item)
endclass

4

In reply to shankar_logic:
It is still unclear to me what is packet? Is this one class or is it 3 different classes?
Maybe you can use only 1 class with different data fields inside. And you are using different data fields for certain seq_items.

5

These are 3 different classes for packets

6

In reply to shankar_logic:

What di you mean with different?. Do they have a different structure or different data fields or do they use only different values for the data fields?

7

In reply to shankar_logic:

What di you mean with different?. Do they have a different structure or different data fields or do they use only different values for the data fields?