Hi,
I wanted to implement the master sequence in the loopback manner. The data from the 2-3 monitor goes to the master sequence and state machines, then the state machine changes the state and pass that information to the virtual sequence. Then virtual sequence drives the next pair of sequences. Can we send the data back and forth in the loopback manner in the master sequences? Thanks.
In reply to bijalthakkar:
Yes, it’s possible to implement a loopback mechanism in your UVM testbench where data is sent back and forth between the master sequences and the virtual sequence. This loopback mechanism can be used for various purposes such as implementing closed-loop verification scenarios or handling responses based on the data received.
Here is a high-level overview of how you might structure your testbench to achieve this:
Master Sequences:
Create master sequences that generate specific sequences based on the current state or conditions observed during the simulation.
Implement a mechanism in the master sequence to capture relevant information from the DUT (Device Under Test) or monitors.
State Machine:
Implement a state machine that processes the captured information from the master sequences and updates its internal state accordingly.
Define different states in the state machine to represent various scenarios or conditions.
Virtual Sequence:
Create a virtual sequence that interacts with the state machine and drives the next set of master sequences based on the current state.
The virtual sequence receives information from the state machine and uses it to make decisions about which master sequences to activate.
Loopback Mechanism:
Implement a mechanism to send information back from the virtual sequence to the master sequences.
This could involve updating certain variables or flags that influence the behavior of the master sequences.
Execution Flow:
The simulation begins with the virtual sequence driving the initial set of master sequences.
The master sequences capture information during their execution and pass it to the state machine.
The state machine processes the information, updates its state, and informs the virtual sequence.
The virtual sequence decides on the next set of master sequences based on the current state and continues the loop.
Remember that the exact implementation details will depend on the specific requirements of your testbench and the interactions between the different components. You may use events, queues, or other synchronization mechanisms to ensure proper communication between the sequences and state machine.
Always ensure that your loopback mechanism is well-synchronized and doesn’t lead to race conditions or other synchronization issues. Additionally, make sure to model realistic scenarios in your master sequences and handle corner cases appropriately to achieve comprehensive verification.
rahulvala@gmail.com
Freelancer/verification engineer
https://www.linkedin.com/in/rahulvala/
In reply to Rahulvala:
Thanks Rahul for your response.
As virtual sequence is object and state machines are as components so how between them the communication will be done back and forth.
Thanks.
In reply to bijalthakkar:
Please read the Cliff Cummins reactive Agent concept and it will be simple and straightforward.
Thanks!