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fpgasystem-verilogmodelsim

Systemverilog Generate mailboxes

How can i generate many mailboxes, for example with generate endgenerate and the how to i put data to one for them.

I tried doing 

generate 
for (genvar i=0; i<10; i++) begin
     mailbox test = new();
end
endgenerate

and it creates 10 mailboxes but then i didn't know how to put data to one of them i would imagine something like 

test[4].put(input);

but it doesnt work

any ideas??

Solution

  • Whenever you a generate-for loop, you need to name the block, and it is the block name that get expanded into numbered blocks. generate 

    for (genvar I=0; I<10; i++) begin : block_A
     mailbox test;
end : block_a
endgenerate

    Then you can reference block_a[0].test, block_a[1].test, .etc.

    But you probably do not want to use a generate block for this as you will not allowed to use a variable to index into the block since the block is not a regular array.

    You can simply declare a regular carry of mailboxes. 

    mailbox #(int) test[10];

initial begin
     foreach(mailbox[ii]) mailbox[ii] = new;

    I also recommend that you parameterize your mailbox by the type of message you will bet putting into it.