I am implementing a 2:1 MUX using AND, OR, NOT, etc with fault handling but there is a problem in the code, I haven't done this complex code earlier. I wanted to make a module through which I can see the change in output when I inject a fault to any node. I didn't find the error so can anyone help me.
I have attached the code and Screenshot of the output run in the command prompt.
module Inverter (in, out, fault);
input in, fault;
output out;
assign out = fault ? in : ~in;
endmodule
module LShapedWire(in, out, fault);
input in, fault;
output out;
assign out = fault ? ~in : in;
endmodule
module Fanout(in, out1, out2, fault1 fault2);
input in, fault1,fault2;
output out1, out2;
assign out1 = fault1 ? ~in : in;
assign out2 = fault2 ? ~in : in;
endmodule
module And (input1 , input2 , out2, fault)
input input1, input2, fault;
output out2 , out1;
assign out1 = input1 & input2;
assign out2 = fault ? ~out1 : out1;
endmodule
module Or (input1 , input2 , out2, fault)
input input1,input2 ,fault;
output out1, out2;
assign out1 = input1 | input2;
assign out2 = fault ? ~out1 : out1;
endmodule
module mux:
reg A , B , Sel;
reg faultLS1 , faultLS2;
reg faultAND1 , faultAND2;
reg faultINV1;
reg faultOR1;
reg fault1FO1, fault2FO1;
wire outAND1 , outAND2;
wire outLS1 , outLS2;
wire outINV1;
wire outOR1;
wire out1FO1 , out2FO1;
initial
begin
A=0;B=0;Sel=0;
faultLS1 = 0; faultLS2 = 0;
faultAND1 = 0; faultAND2 = 0;
faultINV1 = 0;
faultOR1 = 0;
fault1FO1 = 0; fault2FO1 = 0;
#10 B=0;Sel=1;
#10 B=1;Sel=0;
#10 Sel=1;
#10 A=1;B=0;Sel=0;
#10 B=0;Sel=1;
#10 B=1;Sel=0;
#10 Sel=1;
end
Fanout FO1(Sel, out1FO1 , out2FO1 , fault1FO1, fault2FO1);
LShapedWire LS1(out1FO1, outLS1, faultLS1);
And AND1(A , outLS1 , outAND1 , faultAND1);
Inverter INV1(out2FO1 , outINV1 , faultINV1);
And AND2(outINV1, B , outAND2, faultAND2);
LShapedWire LS2( outAND2 , outLS2 , faultLS2);
Or OR1(outAND1 , outLS2 ,outOR1 , faultOR1);
initial
begin
$monitor($time,,,,,Sel,,A,,B,,,,,,outOR1);
end
endmodule
