verilog - Simulation of Modelsim launching from Quartus doesn't work properly -


this test bench

`timescale 1 ps/ 1 ps  module sum_fix_vlg_tst();  reg select; reg [7:-8] valor_a; reg [7:-8] valor_b;   // wires                                                wire [8:-8]  result_fx;  sum_fix i1 (  .result_fx(result_fx), .select(select), .valor_a(valor_a), .valor_b(valor_b)  );  initial                                                 $monitor ("valor_a = %b, valor_b = %b, result_fx = %b", valor_a,  valor_b,result_fx);  initial begin                                                   #10 select = 1; valor_a = 32'b0000000011111111; valor_b = 32'b0000000011111111;  #20  valor_a = 32'b1111111111111111; valor_b = 32'b1111111111111111;  #30  valor_a = 32'b1001100111001000; valor_b = 32'b0001111000111101;  end                                                      endmodule

and uut

`timescale 1 ps/ 1 ps module sum_fix (valor_a,valor_b,result_fx,select);  input [7:-8] valor_a,valor_b; output reg [8:-8] result_fx; input select;   always@ (valor_a or valor_b) begin  if (select==1) result_fx = valor_a + valor_b; else     result_fx = valor_a - valor_b; end  endmodule

compiled in quartus well. launch modelsim this: tools > rtl simulation. launch modelsim gives me lot of zzzzzzzzzzzzz in input , xxxxxxxxxxxxxx in output without in wave.

i want i'm not sure if added testbench correctly project. i'm beginer. did was: assignments > settings > compile test: click test benches > new, looked file , add, , ok. i'm not sure correct way, because looks complex. please on this.

also, comment initiate test bench writter template in quartus, ended changing file, final result code above.

so, tried code on edaplayrgound (http://www.edaplayground.com/x/cyc), , looks fine me. (you give run yourself, if you'd like).

you're seeing x's because @ time 0, haven't specified values of inputs (since delay 10 timesteps before assigning anything). consider either removing first #10, or putting assignments before it.

(x = unknown value; z = high impedance, means neither 1 nor 0 input).

as setting in quartus, way did correct.


Comments

Post a Comment

Popular posts from this blog

javascript - jQuery: Add class depending on URL in the best way -

i have html progress meter: <div class="col-md-3" style="margin-left: -20px;"> <div class="progress-pos active" id="progess-1"> <div class="progress-pos-inner"> login </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-2"> <div class="progress-pos-inner"> scan items </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-3"> <div class="progress-pos-inner"> confirm address </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-4"> <div class="progress-pos-in
Read more

caching - How to check if a url path exists in the service worker cache -

i need check if particular url path exists in service worker cache. example, suppose url is: /myserviceworker/service?a=110&b=70 this url exists in cache, there many of them different values of , b. now, suppose want refresh of these urls, how can that? i want know how access key values service worker cache. if know key, plan follows: var url = new url(key); if(url.pathname === "\/myserviceworker/service") refetch key but not sure how cache key , in format is. mean, string or url? cache api has match() method returns promise resolving in response object if match or undefined if no match exists. second parameter object can specify ignoresearch not take account url parameters. the ignoresearch option supported firefox ( chrome status here ). in other hand, retrieve cache entries, can use keys() method.
Read more

Redirect to a HTTPS version using .htaccess -

i need modify .htaccess file redirect urls https version without "www". http://example.com --> https://example.com http://www.example.com --> https://example.com https://www.example.com --> https://example.com this how .htaccess file looks like: rewriteengine on rewritecond %{request_filename} !-d rewritecond %{request_filename} !-f rewriterule ^(.*)$ redirect.php?id=$1&page=$2 [qsa,l] what modifications need make .htaccess in order forward https without "www"? it depends on doing current code. looks file called redirect trying display php page seo friendly url. think might confusing people. anyway, need , force https without www, need 1 more rule above. also second rule needs two capture groups in rewriterule test string because wanting 2 different values using $1 , $2 references. rewriteengine on #rediect www non www and/or http https --- combinations. rewritecond %{http_host} !^example\.com [nc,or] rewritecond %{https} !^
Read more