BIDIRECTIONAL PORT

[JAWALE SHANTANU JAGANNATH 13MVD0070]

module inout1(avdd1,dvdd1,check2,check3,check5);

input avdd1;

input check2;

output reg check3,check5;

output reg dvdd1;

wire ch;

wire ch1;

inout12 i1(avdd1,ch,ch1,check2,check5);

always@(*)

begin

dvdd1=ch;

check3=ch1;

end

endmodule

/*

module inout12(avdd,dvdd,check2,check3);

inout avdd,dvdd;

inout check2;

inout check3;

`ifdef check1_output

assign check2 = check3 ? 1 : 0;

`endif

//assign check4 = 1'b1;

/*

always@(*)

begin

 check4=1'b1;

end

*/

`ifdef avdd_as_input

assign dvdd=avdd;

`endif

`ifdef avdd_as_output

assign avdd=dvdd;

`endif // avdd_as_output

endmodule

TESTBENCH

module inout_tb();

reg avdd1;

reg check2;

wire check3;

wire dvdd1;

inout1 l1(.avdd1(avdd1),.dvdd1(dvdd1),.check2(check2),.check3(check3));

initial

begin

 avdd1=1'b1;

  #2 avdd1=1'b0;

  #4 check2 = 1'b1;

  #300;

  #2 avdd1=1'b1;

  #100 avdd1=1'b0;

#3000 $finish;

end

endmodule

In above program QUESTIONS

1)we can declare inout as reg ?

2)inner module inout while at top if we connect to output /reg  is shows error 

 Expression connected to an 'inout' port must be collapsible.

thats is why i connect through wire and then to output but i want to connect directly to output is there any way we can do changes in inout12.v inner module so that inout pin at top directly we can connect to putput