counterporti.v

an up down counter in verilog

module counterPorti(ck,reset,ld,cen,up_dn,data,count_to,       //semnale de intrare
                    count,tercnt);                             //semnale de iesire

parameter width=4;
parameter adun=1;

input               ck,ld,reset,cen,up_dn;     //input signals
input  [width-1:0]  data,count_to; 

output [width-1:0]  count;                      //output signals
output              tercnt;


wire o1,o2,o3,o4;
wire o11,o22,o33,o44;

counterPart1 counterPart1_DUT4(.cen(cen),
                               .up_dn(up_dn),
                               .out(o4) 
                               );

counterPart1 counterPart1_DUT3(.cen(cen),
                               .up_dn(up_dn),
                               .out(o3) 
                               );

counterPart1 counterPart1_DUT2(.cen(cen),
                               .up_dn(up_dn),
                               .out(o2) 
                               );

counterPart1 #adun counterPart1_DUT1(.cen(cen),
                                     .up_dn(up_dn),
                                     .out(o1) 
                                     );

counterPart2 #width counterPart2_DUT(.in1(o1),
                                     .in2(o2),
                                     .in3(o3),
                                     .in4(o4),
                                     .count(count),
                                     .out1(o11),
                                     .out2(o22),
                                     .out3(o33),
                                     .out4(o44)
                                     );

counterPart3 #width counterPart3_DUT(.ck(ck),
                                     .ld(ld),
                                     .data(data),
                                     .count_to(count_to),
                                     .reset(reset),
                                     .in1(o11),
                                     .in2(o22),
                                     .in3(o33),
                                     .in4(o44),
                                     .count(count),
                                     .tercnt(tercnt)
                                     );

endmodule