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module testbench;
reg clk;
initial begin
// $dumpfile("testbench.vcd");
// $dumpvars(0, testbench);
#5 clk = 0;
repeat (10000) begin
#5 clk = 1;
#5 clk = 0;
end
$display("OKAY");
end
reg [2:0] dinA = 0;
wire doutB,doutB1,doutB2,doutB3,doutB4;
reg dff,ndff,adff,adffn,dffe = 0;
top uut (
.clk (clk ),
.a (dinA[0] ),
.pre (dinA[1] ),
.clr (dinA[2] ),
.b (doutB ),
.b1 (doutB1 ),
.b2 (doutB2 )
);
always @(posedge clk) begin
#3;
dinA <= dinA + 1;
end
always @( posedge clk, posedge dinA[1], posedge dinA[2] )
if ( dinA[2] )
dff <= 1'b0;
else if ( dinA[1] )
dff <= 1'b1;
else
dff <= dinA[0];
always @( negedge clk, negedge dinA[1], negedge dinA[2] )
if ( !dinA[2] )
ndff <= 1'b0;
else if ( !dinA[1] )
ndff <= 1'b1;
else
ndff <= dinA[0];
always @( posedge clk, posedge dinA[2] )
if ( dinA[2] )
adff <= 1'b0;
else
adff <= dinA[0];
always @( posedge clk, negedge dinA[2] )
if ( !dinA[2] )
adffn <= 1'b0;
else
adffn <= dinA[0];
always @( posedge clk )
if ( dinA[2] )
dffe <= dinA[0];
assert_dff dff_test(.clk(clk), .test(doutB), .pat(dff));
assert_dff ndff_test(.clk(clk), .test(doutB1), .pat(ndff));
assert_dff adff_test(.clk(clk), .test(doutB2), .pat(adff));
//assert_dff adffn_test(.clk(clk), .test(doutB3), .pat(adffn));
//assert_dff dffe_test(.clk(clk), .test(doutB4), .pat(dffe));
endmodule
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