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testbench with error at the end.v
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testbench with error at the end.v
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module TestBench;
reg clk, on, rst;
reg [2:0] in_sel; //persist, load, reset
//reg [7:0] previous;
reg [6:0] out_sel; //which operation to do, comes out of the last mux
reg [7:0] num1, num2;
wire [7:0] out, final1, final2; //output value
wire [1:0] currState, nextState;
main myMain(clk, on, in_sel, num1, num2, final1, final2, out_sel, out, currState, nextState);
initial begin
clk = 1; #10 clk = 0;
$display(" Num1 Num2 Operation Current State Output Next State");
$display("-------------------------------------------------------------------------------------------------------------------------------------------------");
forever
begin
#10 clk = 0;
#10 clk = 1;
#20
casex ({out_sel, currState, nextState})
11'b10000000000 : $display(" %b (%d)| %b (%d)| %b(Mult)| %b(Off) | %b (%d)| %b(Off)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b10000000001 : $display(" %b (%d)| %b (%d)| %b(Mult)| %b(Off) | %b (%d)| %b(Ready)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b10000000100 : $display(" %b (%d)| %b (%d)| %b(Mult)| %b(Ready) | %b (%d)| %b(Off)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b10000000110 : $display(" %b (%d)| %b (%d)| %b(Mult)| %b(Ready) | %b (%d)| %b(Running)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b10000001010 : $display(" %b (%d)| %b (%d)| %b(Mult)| %b(Running) | %b (%d)| %b(Running)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b10000001011 : $display(" %b (%d)| %b (%d)| %b(Mult)| %b(Running) | %b (%d)| %b(Running w/ error)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b10000001101 : $display(" %b (%d)| %b (%d)| %b(Mult)| %b(Running w/ error)| %b (%d)| %b(Ready)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
//end mult, start sub
11'b01000000000 : $display(" %b (%d)| %b (%d)| %b(Sub) | %b(Off) | %b (%d)| %b(Off)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b01000000001 : $display(" %b (%d)| %b (%d)| %b(Sub) | %b(Off) | %b (%d)| %b(Ready)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b01000000100 : $display(" %b (%d)| %b (%d)| %b(Sub) | %b(Ready) | %b (%d)| %b(Off)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b01000000110 : $display(" %b (%d)| %b (%d)| %b(Sub) | %b(Ready) | %b (%d)| %b(Running)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b01000001010 : $display(" %b (%d)| %b (%d)| %b(Sub) | %b(Running) | %b (%d)| %b(Running)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b01000001011 : $display(" %b (%d)| %b (%d)| %b(Sub) | %b(Running) | %b (%d)| %b(Running w/ error)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b01000001101 : $display(" %b (%d)| %b (%d)| %b(Sub) | %b(Running w/ error)| %b (%d)| %b(Ready)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
//end sub start add
11'b00100000000 : $display(" %b (%d)| %b (%d)| %b(Add) | %b(Off) | %b (%d)| %b(Off)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00100000001 : $display(" %b (%d)| %b (%d)| %b(Add) | %b(Off) | %b (%d)| %b(Ready)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00100000100 : $display(" %b (%d)| %b (%d)| %b(Add) | %b(Ready) | %b (%d)| %b(Off)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00100000110 : $display(" %b (%d)| %b (%d)| %b(Add) | %b(Ready) | %b (%d)| %b(Running)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00100001010 : $display(" %b (%d)| %b (%d)| %b(Add) | %b(Running) | %b (%d)| %b(Running)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00100001011 : $display(" %b (%d)| %b (%d)| %b(Add) | %b(Running) | %b (%d)| %b(Running w/ error)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00100001101 : $display(" %b (%d)| %b (%d)| %b(Add) | %b(Running w/ error)| %b (%d)| %b(Ready)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
//end add, start NOT
11'b00010000000 : $display(" %b (%d)| %b (%d)| %b(NOT) | %b(Off) | %b (%d)| %b(Off)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00010000001 : $display(" %b (%d)| %b (%d)| %b(NOT) | %b(Off) | %b (%d)| %b(Ready)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00010000100 : $display(" %b (%d)| %b (%d)| %b(NOT) | %b(Ready) | %b (%d)| %b(Off)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00010000110 : $display(" %b (%d)| %b (%d)| %b(NOT) | %b(Ready) | %b (%d)| %b(Running)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00010001010 : $display(" %b (%d)| %b (%d)| %b(NOT) | %b(Running) | %b (%d)| %b(Running)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00010001011 : $display(" %b (%d)| %b (%d)| %b(NOT) | %b(Running) | %b (%d)| %b(Running w/ error)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00010001101 : $display(" %b (%d)| %b (%d)| %b(NOT) | %b(Running w/ error)| %b (%d)| %b(Ready)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
//end NOT, start XOR
11'b00001000000 : $display(" %b (%d)| %b (%d)| %b(XOR) | %b(Off) | %b (%d)| %b(Off)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00001000001 : $display(" %b (%d)| %b (%d)| %b(XOR) | %b(Off) | %b (%d)| %b(Ready)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00001000100 : $display(" %b (%d)| %b (%d)| %b(XOR) | %b(Ready) | %b (%d)| %b(Off)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00001000110 : $display(" %b (%d)| %b (%d)| %b(XOR) | %b(Ready) | %b (%d)| %b(Running)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00001001010 : $display(" %b (%d)| %b (%d)| %b(XOR) | %b(Running) | %b (%d)| %b(Running)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00001001011 : $display(" %b (%d)| %b (%d)| %b(XOR) | %b(Running) | %b (%d)| %b(Running w/ error)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00001001101 : $display(" %b (%d)| %b (%d)| %b(XOR) | %b(Running w/ error)| %b (%d)| %b(Ready)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
//end XOR, start OR
11'b00000100000 : $display(" %b (%d)| %b (%d)| %b(OR) | %b(Off) | %b (%d)| %b(Off)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00000100001 : $display(" %b (%d)| %b (%d)| %b(OR) | %b(Off) | %b (%d)| %b(Ready)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00000100100 : $display(" %b (%d)| %b (%d)| %b(OR) | %b(Ready) | %b (%d)| %b(Off)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00000100110 : $display(" %b (%d)| %b (%d)| %b(OR) | %b(Ready) | %b (%d)| %b(Running)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00000101010 : $display(" %b (%d)| %b (%d)| %b(OR) | %b(Running) | %b (%d)| %b(Running)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00000101011 : $display(" %b (%d)| %b (%d)| %b(OR) | %b(Running) | %b (%d)| %b(Running w/ error)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00000101101 : $display(" %b (%d)| %b (%d)| %b(OR) | %b(Running w/ error)| %b (%d)| %b(Ready)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
//end OR, start AND
11'b00000010000 : $display(" %b (%d)| %b (%d)| %b(AND) | %b(Off) | %b (%d)| %b(Off)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00000010001 : $display(" %b (%d)| %b (%d)| %b(AND) | %b(Off) | %b (%d)| %b(Ready)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00000010100 : $display(" %b (%d)| %b (%d)| %b(AND) | %b(Ready) | %b (%d)| %b(Off)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00000010110 : $display(" %b (%d)| %b (%d)| %b(AND) | %b(Ready) | %b (%d)| %b(Running)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00000011010 : $display(" %b (%d)| %b (%d)| %b(AND) | %b(Running) | %b (%d)| %b(Running)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00000011011 : $display(" %b (%d)| %b (%d)| %b(AND) | %b(Running) | %b (%d)| %b(Running w/ error)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
11'b00000011101 : $display(" %b (%d)| %b (%d)| %b(AND) | %b(Running w/ error)| %b (%d)| %b(Ready)",final1, final1, final2, final2, out_sel, currState, out, out, nextState);
endcase
end
end
initial begin //reset is part of in_selector
#20
/*rst=0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00000001; num2 = 8'b00000010; out_sel = 7'b1000000; //1 x 2
#20
#20;
/*rst =0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00000011; num2 = 8'b00000010; out_sel = 7'b1000000; //3 x 2
#20;
/* #20;
/*rst =0*/
// on = 1'b1; in_sel = 3'b010; num1 = 8'b01010111; num2 = 8'b00011010; out_sel = 7'b1000000; //overflow
// #20;
#20;
on = 1'b1; in_sel = 3'b010; num1 = 8'b00000001; num2 = 8'b00000011; out_sel = 7'b1000000; //1 x 3
#20;
#20;
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00000010; num2 = 8'b00000100; out_sel = 7'b1000000; //2 x 4
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00000010; num2 = 8'b00000100; out_sel = 7'b0100000; //2 - 4
#20
#20
/*rst = 1;*/
on = 1'b1; in_sel = 3'b100; num1 = 8'b00000010; num2 = 8'b00000100; out_sel = 7'b0100000; //2 - 4 but reset is on
#20
#20;
/*rst =0*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b11010111; num2 = 8'b01011010; out_sel = 7'b1000000; //overflow
#20;
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00000100; num2 = 8'b00001000; out_sel = 7'b0010000; //4 + 8
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00000100; num2 = 8'b00001000; out_sel = 7'b1000000; //4 * 8
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00001001; num2 = 8'b00001010; out_sel = 7'b0010000; //9 + 10
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b11000001; num2 = 8'b10000110; out_sel = 7'b0100000; //193 - 134
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00110010; num2 = 8'b00011001; out_sel = 7'b0010000; // 50 + 25
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00110010; num2 = 8'b00011001; out_sel = 7'b0001000; // 50 NOT 25
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b10000001; num2 = 8'b00000011; out_sel = 7'b0001000; // 129 NOT 3 = NOT 129 = 126
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00110010; num2 = 8'b00011001; out_sel = 7'b0000100; // 50 XOR 25
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00110010; num2 = 8'b00011001; out_sel = 7'b0000010; // 50 OR 25
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00110010; num2 = 8'b00011001; out_sel = 7'b0000001; // 50 AND 25
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00011110; num2 = 8'b00011110; out_sel = 7'b0000001; // 30 AND 30
#20
#20
/*rst = 1;*/
on = 1'b1; in_sel = 3'b100; num1 = 8'b00011110; num2 = 8'b10000000; out_sel = 7'b0010000; // 30 XOR 128 but reset is on
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b11100000; num2 = 8'b01111111; out_sel = 7'b0100000; // 224 - 127
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b01111000; num2 = 8'b00000001; out_sel = 7'b0000001; // 120 AND 1
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00001000; num2 = 8'b00001010; out_sel = 7'b0000100; // 8 XOR 10
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00001100; num2 = 8'b00000111; out_sel = 7'b0000001; // 12 AND 7
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00001011; num2 = 8'b00001010; out_sel = 7'b0000010; // 11 OR 10
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00011110; num2 = 8'b00000010; out_sel = 7'b0000001; // 30 AND 2
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00011110; num2 = 8'b00000010; out_sel = 7'b1000000; // 30 * 2
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b11010111; num2 = 8'b00001001; out_sel = 7'b0001000; // 215 NOT 9 = NOT 215
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00111100; num2 = 8'b00111100; out_sel = 7'b0010000; // 60 + 60
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00011011; num2 = 8'b00000000; out_sel = 7'b0000010; // 27 OR 0
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00001101; num2 = 8'b00000111; out_sel = 7'b0100000; // 13 - 7
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00101111; num2 = 8'b01110011; out_sel = 7'b0000010; // 47 OR 115
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b01111000; num2 = 8'b01111000; out_sel = 7'b0000100; // 120 XOR 120
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b01101110; num2 = 8'b00001010; out_sel = 7'b0010000; // 110 + 10
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b10000000; num2 = 8'b01100100; out_sel = 7'b0100000; // 128 - 100
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b11111110; num2 = 8'b00001010; out_sel = 7'b0001000; // 254 NOT 10
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00001011; num2 = 8'b00000011; out_sel = 7'b1000000; // 11 * 3
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b01111000; num2 = 8'b00000111; out_sel = 7'b0000100; // 144 XOR 7
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b11100110; num2 = 8'b10010001; out_sel = 7'b0000100; // 230 XOR 145
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b01110111; num2 = 8'b00010011; out_sel = 7'b0000001; // 119 AND 19
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b01000001; num2 = 8'b00001000; out_sel = 7'b0000100; // 65 XOR 8
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b11000111; num2 = 8'b01100100; out_sel = 7'b0100000; // 199 - 100
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b100; num1 = 8'b11110111; num2 = 8'b01100100; out_sel = 7'b0100000; // 247 - 100 but reset is on
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b10000010; num2 = 8'b00001010; out_sel = 7'b0000001; // 130 AND 10
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00001110; num2 = 8'b01111000; out_sel = 7'b0000100; // 14 XOR 120
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b11011101; num2 = 8'b01100100; out_sel = 7'b0000001; // 221 AND 100
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00010110; num2 = 8'b01100100; out_sel = 7'b0000010; // 22 OR 100
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00010110; num2 = 8'b01100100; out_sel = 7'b0000001; // 22 AND 100
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00010110; num2 = 8'b01100100; out_sel = 7'b0000100; // 22 XOR 100
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b10101111; num2 = 8'b00001000; out_sel = 7'b0001000; // 175 NOT 8
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b11000101; num2 = 8'b01011001; out_sel = 7'b0100000; // 197 - 89
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b10111011; num2 = 8'b01100011; out_sel = 7'b0001000; // 187 NOT 99
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00011011; num2 = 8'b00001110; out_sel = 7'b0010000; // 27 + 14
#20
//52 outputs
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b11111010; num2 = 8'b10010110; out_sel = 7'b0000100; // 250 XOR 150
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b01001000; num2 = 8'b00001101; out_sel = 7'b0000001; // 72 AND 13
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00000100; num2 = 8'b00001000; out_sel = 7'b1000000; // 4 * 8
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b10010001; num2 = 8'b11111010; out_sel = 7'b0001000; // 145 NOT 250
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b01000001; num2 = 8'b00100011; out_sel = 7'b0100000; // 65 - 35
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00110101; num2 = 8'b00001100; out_sel = 7'b0000100; // 53 XOR 12
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b10111110; num2 = 8'b01010111; out_sel = 7'b0000001; // 197 AND 87
#20
#20
/*rst = 0;*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b00101011; num2 = 8'b00101001; out_sel = 7'b0000010; // 43 OR 41
#20
#20
#20;
/*rst =0*/
on = 1'b1; in_sel = 3'b010; num1 = 8'b01010111; num2 = 8'b00011010; out_sel = 7'b1000000; //overflow
#20;
//61 outputs
#20
#20 //ending time
$stop;
end
initial begin
#3000
$finish;
end
endmodule