Home Specman / e Useful OVM-e Snippets

Search

Useful OVM-e Snippets PDF Print E-mail
User Rating: / 10
PoorBest 
Thursday, 24 December 2009 16:41

How to activate Specman Profiler? How to get rid of automatic vr_ad coverage? Let's find out.

 

How to activate Specman Profiler?

extend sys {
setup() is also {
specman("set profile");
};
};

 

 

How to get rid of automatic vr_ad coverage?

extend sys {
setup() is also {
set_cover("vr_ad_reg", FALSE);
};
};

 

 

How to continue simulation regardless of DUT errors?

extend sys {
setup() is also {
set_check( "...", ERROR_CONTINUE );
// set_check( "...", IGNORE );  -- use this to disable DUT errors completely
};
};

 

 

How to instantiate a logger?

extend your_unit {
logger: message_logger is instance;
keep soft logger.verbosity == MEDIUM;
keep soft logger.tags == {NORMAL};
short_name(): string is {
result = append("YOUR_UNIT_NAME"); // can also be a dedicated evc_name
};
// Constrain the output coloring for better visibility
short_name_style(): vt_style is {
result = BLUE;
};
};

 

 

How to generate a random list of numbers?

gen_random_list_of_numbers(num_of_items: uint, max_val: uint): list of uint is {
assert num_of_items <= max_val + 1;
var next_item: uint;
for i from 1 to num_of_items {
gen next_item keeping {
it <= max_val;
it not in result;
};
result.add(next_item);
};
result = result.sort(it);
};



How to implement register side affect with vr_ad?

extend MY_REG vr_ad_reg {
post_access(direction : vr_ad_rw_t) is {
if direction == WRITE then { // or READ
// get pointer to the enclosing reg file
var rgf := get_parents()[0].as_a(REG_FILE_TYPE vr_ad_reg_file);
// side affect
if bit0 == 1 then {
rgf.another_register.another_bit = 1;
};
};
};
};

 

 

How to control generation of Boolean variables elegantly?

gen_true_or_false(true_prob: uint): bool is {
assert that true_prob <= 100;
gen result keeping {
soft it == select {
true_prob      : TRUE;
(100-true_prob): FALSE;
};
};
};

 

 

How to declare a sequence?

sequence my_prefix_seq_s using
item = my_prefix_frame_s,
created_kind   = my_prefix_seq_kind_t,
created_driver = my_prefix_driver_u,
sequence_type  = my_prefix_any_sequence_s,  // optional
sequence_driver_type = my_prefix_any_sequence_driver_u; // optional

 

 

How to use method ports?

struct packet {
just_a_number: uint;
};
// define a method type
 method_type packet_method_t (p: packet);
// add an output port
unit tx_u {
broadcast_packet: out method_port of packet_method_t is instance;
send_packet_to_port() is {
broadcast_packet$(pkt);
};
};
// add an input port
unit rx_u {
receive_packet: in method_port of packet_method_t is instance;

 receive_packet(p :packet)  is {
message(LOW,"packet received");
print p using hex;
};
};
//make a one-to-many connection
extend sys {
tx: tx_u is instance;
rx_list[2] : list of rx_u is instance;

 connect_ports() is also {
for each in rx_list {
do_bind(tx.broadcast_packet, it.receive_packet);
};
};
};
 

 

 
More articles :

» The Miracle Of Verification

Is verification really a miracle and verifiers have ceased to be engineers? Not too long ago I wrote an about some common myths in Verification. Today I would like to talk about a bigger myth which I like to call the "Verification Miracle Myth"....

» Get Hooked

Changing an existing eVC for new project requirements is a grueling task. It’s really painful for any eVC developer to witness his creation being torn apart by an end user, but a little prudence from the developer can result into longevity of eVC....

» Future Trends In HR

The industry is going through some tough times, no doubt about it. We’ve seen layoffs worldwide, projects being cancelled or put off for better times. How is this going to affect the way companies manage their human resources? Joining us today for...

» EndMaker: Make Your SystemVerilog Code Look Professional (Free Utility)

This is a cool little utility that will make your SystemVerilog look much more professional. It simply adds an end-of-method identifier (label) to every task or function so that every endfunction turns into endfunction : function_name (with the...

» Get Organized Even On Windows

Here’s a cool (and free) application that can make your life a bit more organized if you tend to have many open windows.

Comments  

 
0 #1 2011-05-26 17:14
in e 9.2 - it is better to use the connect() pseudo method to connect method ports - thus solve the "star topology" issues
Quote
 

Add comment


Security code
Refresh

Copyright © 2019 Think Verification - Tips & Insights on ASIC Verification. All Rights Reserved.
Joomla! is Free Software released under the GNU/GPL License.