-
Notifications
You must be signed in to change notification settings - Fork 0
/
router_top_tb.v
163 lines (163 loc) · 2.79 KB
/
router_top_tb.v
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
module router_top_tb();
reg clk, resetn, read_enb_0, read_enb_1, read_enb_2, packet_valid;
reg [7:0]data_in;
wire [7:0]data_out_0, data_out_1, data_out_2;
wire vld_out_0, vld_out_1, vld_out_2, err, busy;
integer i;
parameter
cycle=10;
router_top DUT(.clock(clk), .resetn(resetn),.read_enb_0(read_enb_0),.read_enb_1(read_enb_1),.read_enb_2(read_enb_2),.pkt_valid(packet_valid),.data_in(data_in),.data_out_0(data_out_0),.data_out_1(data_out_1),.data_out_2(data_out_2),.vld_out_0(vld_out_0),.vld_out_1(vld_out_1),.vld_out_2(vld_out_2),.err(err),.busy(busy) );
//clock generation
initial
begin clk = 1;
forever #5 clk = ~clk;
end
task reset;
begin
@(negedge clk)
resetn=1'b0;
@(negedge clk)
resetn=1'b1;
end
endtask
task initialize;
begin
resetn = 1'b1;
{read_enb_0, read_enb_1, read_enb_2, packet_valid}=0;
end
endtask
task pktm_gen_5;
reg [7:0]header, payload_data, parity;
reg [8:0]payloadlen;
begin parity=0;
wait(!busy)
begin @(negedge clk);
payloadlen=5;
packet_valid=1'b1;
header={payloadlen,2'b10};
data_in=header;
parity=parity^data_in;
end
@(negedge clk);
for(i=0;i<payloadlen;i=i+1)
begin
wait(!busy)
begin
@(negedge clk);
payload_data={$random}%256;
data_in=payload_data;
parity=parity^data_in;
end
end
wait(!busy)
begin
@(negedge clk);
packet_valid=0;
data_in=parity;
end
repeat(2)
@(negedge clk);
read_enb_2=1'b1;
wait(DUT.FIFO_2.empty)
@(negedge clk)
read_enb_2=0;
end
endtask
task pktm_gen_14;
reg [7:0]header, payload_data, parity;
reg [8:0]payloadlen;
begin
parity=0;
wait(!busy)
begin
@(negedge clk);
payloadlen=14;
packet_valid=1'b1;
header={payloadlen,2'b01};
data_in=header;
parity=parity^data_in;
end
@(negedge clk);
for(i=0;i<payloadlen;i=i+1)
begin
wait(!busy)
begin
@(negedge clk);
payload_data={$random}%256;
data_in=payload_data;
parity=parity^data_in;
end
end
wait(!busy)
begin
@(negedge clk);
packet_valid=0;
data_in=parity;
end
repeat(2)
@(negedge clk);
read_enb_1=1'b1;
wait(DUT.FIFO_1.empty)
@(negedge clk)
read_enb_1=0;
end
endtask
task pktm_gen_16;
reg [7:0]header, payload_data, parity;
reg [8:0]payloadlen;
begin
parity=0;
wait(!busy)
begin
@(negedge clk);
payloadlen=16;
packet_valid=1'b1;
header={payloadlen,2'b00};
data_in=header;
parity=parity^data_in;
end
@(negedge clk);
for(i=0;i<payloadlen;i=i+1)
begin
wait(!busy)
begin
@(negedge clk);
payload_data={$random}%256;
data_in=payload_data;
parity=parity^data_in;
end
end
wait(!busy)
begin
@(negedge clk);
packet_valid=0;
data_in=parity;
end
repeat(2)
@(negedge clk);
read_enb_0=1'b1;
wait(DUT.FIFO_0.empty)
@(negedge clk)
read_enb_0=0;
end
endtask
initial
begin
initialize;
reset;
#10;
pktm_gen_5;
#100;
reset;
pktm_gen_14;
#100;
pktm_gen_16;
#700;
$finish;
end
initial
begin
$dumpfile("router_top_tb.vcd");
$dumpvars;
end
endmodule