- 1 answer5,168 views
I’m trying to write an assertion to “Verify that the TMS output changes on the falling edge of TCK.” Is this possible? It sounds simple, but I’m running into a few issues.
The most obvious solution in my mind was to just see if it is $stable:Last Activity 1 week 4 days ago by rexjohn4u
- 1 answer55 views
We have a SV module that I need to port over to OVM. What is a good resource for that? The module basically takes two interfaces and copies data from one to the other based on a config.Last Activity 1 month 1 day ago by dave_59
- 1 answer97 views
3 packets are coming to score board, 1 and 2 packets came properly, but last packet comes with delay of 10, then how to detect this delay in scoreboard without using assertion VIP and waveform viewer. How to implement it in scoreboard?Last Activity 1 month 3 weeks ago by manoj_k86
- 1 solution87 views
Is it possible to randomize the time delay in order to create random sequences? What I mean is for example,
sig_value = 1'b1;
sig_value = 1_b0;
Can someone shed light on how to do this? Thank you in advance.Last Activity 1 month 3 weeks ago by Tudor Timi
- 1 solution6,393 views
I heard that cadence has a RGM package available for ovm. Is there any where I can find more info about it? Will it be integrated into UVM?
How do you compare the RAL and RGM in terms of re-usability, tool support, basic concepts, sim performance, and pros and cons?
RichardLast Activity 1 month 3 weeks ago by hctseng
- 1 answer3,952 views
I'm implementing reset test, which generally contains loop with two threads, one generate typical flow sequences and the other wait random time, push a reset to the environment. and so on...
my environment support reset, means scorboards, sequencers and all the other components know how to reset themselves on reset time.
The problem is, some of my flow sequences contains raise and drop objections, and it seems that the sequencer stop_sequences() kill thus sequences but doesn't drop their objections, cause my test to stuck at the end.
is there any recommended method to handle this issue?
NadavLast Activity 1 month 3 weeks ago by dave_59
- 0 answers60 views
I was trying to set some delay before the simulation actually stops (when we call `ovm_fatal).
Below is the code which I was trying. But the problem with this code is the call back is function not a task, so I cannot add delay in that. How can this be done?
class my_object extends ovm_report_object;
virtual function bit report_fatal_hook( string id, string message, int verbosity, string filename, int line);
$display("My callback hook");
class my_test extends ovm_test;
function new (string name="my_test", ovm_component parent=null);
obj = my_object::type_id::create("my_object");
endfunction : new2 months 2 weeks ago - No activity yet
- 1 answer75 views
Compilation error : An abstract (virtual) class cannot be instantiated. and Package common_ovm_pkg could not be bound.
I have not set the OVM_HOME. i.e. echo $OVM_HOME gives OVM_HOME: Undefined variable.
When I am running a test, I am getting the below errors:Last Activity 2 months 3 weeks ago by dave_59
- 0 answers80 views
i am using the code below trying to avoid blocking the sequencer, using "item_done" just tight after the "get_next_item".
my sequence using get_response to compare the actual_data to expected data.
on the time i'm doing the item_done - i get an comparison error since the reurned item got a random data and not the actual data is should have at the end.( when (put,rsp,xact_id) is done).
also , when the code reaches : get_response(rsp, req.get_transaction_id()) i got the following message : Dropping response for sequence %0d, sequence not found. Probable cause: sequence exited or has been killed
how can i solve it?
the code :
my code is :
endtask : run2 months 4 weeks ago - No activity yet
- 1 answer95 views
In the OVM source code for `ovm_field_array_object, `M_OVM_FIELD_ARRAY_OBJ_PACK macro is being called.
Under this macro (M_OVM_FIELD_ARRAY_OBJ_PACK) definition, for OVM_UNPACK case:Last Activity 3 months 13 hours ago by dave_59
- 0 answers76 views
In my project i have 2 agents.I am transmitting both agents expected data from driver to Score board using analysis port.And in between driver and score board i want to put input monitor and my doubts are
How to implement input monitor in ovm environment?
Is it possible to take single monitor to both agents?
and in which block it will create and connect?
With out input monitor can i transfer expected data from driver to score board instead off input monitor to score board?3 months 3 days ago - No activity yet
- 0 answers72 views
What is the significance of
function new(string n="test" ovm_component p=null);
Does it mean object of ovm_component is null or handle to parent is null??
What super.new(n,p) will execute(i'm not sure whether it is a right word to use)?3 months 4 days ago - No activity yet
- 0 answers78 views
I came across the following statements while learning OVM regarding "create" method:
class my_component extends base_component;
driver = my_driver::type_id::create("driver",this);
And the explanation was :: "The
type_id::create()method is a type-specific static method that returns an instance of the
desired type (in this case, my_driver) from the factory. The arguments to create()are the
same as the standard constructor arguments, a string name and a parent component.The
use of the factory allows the developer to derive a new class extended from my_driver and
cause the factory to return the extended type in place of my_driver. Thus, the parent
component can use the new type without modifying the parent class."3 months 4 days ago - No activity yet
- 4 answers6,134 views
I am working on AXI 1.0 now and truing to develop AXI OVC. I used `ovm_sequence_item for generating sequences for APB protocol.But for AXI one of my college told me use `ovm_transaction instead of `ovm_sequence_item. what shall i use `ovm_sequence_item or `ovm_transation to generate the sequences.
what is the difference between them.
how does the below code works,how are they different from one another????
where the difference comes????
Please guide me
class master_transfer extends `ovm_transaction;
rand [31:0] waddr;
rand [31:0] wdata;
rand [3:0] wsize;
rand [31:0] wlength;
class master_transfer extends `ovm_sequence_item;
rand [31:0] waddr;
rand [31:0] wdata;
rand [3:0] wsize;
rand [31:0] wlength;
endclassLast Activity 5 months 1 week ago by dave_59
- 0 answers117 views
1.I had a coverage file with parameter.It gets some transaction via Analysis port form Monitor .But when .write(ocppkt) is called , write function is not exectued .
2.Same file worked without parameters.
class coverage_cc #(int inst_num=0 ) extends ovm_component ;
`ovm_analysis_imp_ocp_mon#(ocp_trans,coverage_cc #(inst_num)) ocp2cc;
function void build();
ocp2cc =new ("ocp2cc",this);
function void write_ocp_mon(input ocp_tran t1)
//NOT ENTERING in this function
endfucntion4 months 3 days ago - No activity yet
- 1 answer161 views
recently, i saw there was one written style as the title shown.
this command line was written in a sequence.
i don't know what p_sequencer here is used for ? is it just because sequence is an object but a component and does not contain get_config_object ? if so, if we use p_sequencer, where could we get the object from ?Last Activity 4 months 4 days ago by gordon
- 8 answers5,724 views
I see that OVM-2.0.2 release comes with a nice Natural Docs generated html document. I wish to document my OVM-2.0.2 based environment similarly and want to know about the relevant filters etc. used with Natural Docs for System Verilog code documentation.
Presently I use doxygen with the System Verilog filter but I suppose that still has minor issues with it.Last Activity 4 months 1 week ago by The Incorruptible