pointers in sequence items

The sequencer and BFM only communicate through the get_next_item() task, so I don't think you can have a pointer in one that references the other. However, give more details of what you're wanting to accomplish and perhaps someone could comment on how to achieve that.

 Tim

Hello Tim, 

Actually, what I need to do is to keep track of some constraint ranges that alter during the simulation. This "simulation feedback" information need not reside in the bfm i suppose -  it could be a part of the agent or env. To this end, I am trying to find when a pointer in a generated item can be initialized.

thanks and regards

 kabb

 Hi kabb,

Sorry for the later response, but I didn't see your question answered yet.

You could use the driver to get the information out of the agent or monitor. Let's assume the driver has a pointer to the agent and the agent (or even its monitor) has ports to the required signals, you can do the following in the body() of your sequence:

body()@driver.clock is {

do item keeping {

.min_range == driver.agent.lower_bound$;

.max_range == driver.agent.upper_bound$;

};

};

If this brings timing problems (with regards to the changes of your constraints) and you really need to have direct access to HDL values at a later stages, you're doomed to (well, it's not that bad, but I'm a big fan of ports ;)) tick access. Fortunately, since you have the ports available already, you can easily give the location in the simulator to the sequence item, so it can access the HDL values whenever deemed necessary:

body()@driver.clock is {

do item keeping {

.min_range_location_string == driver.agent.lower_bound.full_hdl_path();

.max_range_location_string == driver.agent.upper_bound.full_hdl_path();

};

};

I hope this helps you a bit forward.

Good luck,

Hilmar