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
| module lab1(sw,hex0,hex1,hex2,hex3,hex4,hex5,hex6,hex7);
input[17:0] sw;
output[6:0] hex0,hex1,hex2,hex3,hex4,hex5,hex6,hex7;
reg[4:0] h7,h6,h5,h4,h3,h2,h1,h0;
reg[15:0] o1,o2,s;
reg[17:0] sw0;
always@(*)
begin
if(sw[3:0]>9) sw0[3:0]=9;
else sw0[3:0]=sw[3:0];
if(sw[7:4]>9) sw0[7:4]=9;
else sw0[7:4]=sw[7:4];
if(sw[11:8]>9) sw0[11:8]=9;
else sw0[11:8]=sw[11:8];
if(sw[15:12]>9) sw0[15:12]=9;
else sw0[15:12]=sw[15:12];
if(sw[17:16]==0)
begin
h7=16;
h6=16;
h5=16;
h0=sw[15:0]%10;
h1=sw[15:0]/10%10;
h2=sw[15:0]/100%10;
h3=sw[15:0]/1000%10;
h4=sw[15:0]/10000;
show(h0,hex0);
show(h1,hex1);
show(h2,hex2);
show(h3,hex3);
show(h4,hex4);
end
else if(sw[17:16]==1)
begin
o1=sw0[15:12]*10+sw0[11:8];
o2=sw0[7:4]*10+sw0[3:0];
s=o1+o2;
h7=sw0[15:12];
h6=sw0[11:8];
h5=sw0[7:4];
h0=s%10;
h1=s/10%10;
h2=s/100;
h3=16;
h4=sw0[3:0];
show(h0,hex0);
show(h1,hex1);
show(h2,hex2);
show(h3,hex3);
show(h4,hex4);
show(h5,hex5);
show(h6,hex6);
show(h7,hex7);
end
else if(sw[17:16]==2)
begin
o1=sw0[15:12]*10+sw0[11:8];
o2=sw0[7:4]*10+sw0[3:0];
s=o1*o2;
h7=sw0[15:12];
h6=sw0[11:8];
h5=sw0[7:4];
h0=s%10;
h1=s/10%10;
h2=s/100%10;
h3=s/1000%10;
h4=sw0[3:0];
show(h0,hex0);
show(h1,hex1);
show(h2,hex2);
show(h3,hex3);
show(h4,hex4);
show(h5,hex5);
show(h6,hex6);
show(h7,hex7);
end
else if(sw[17:16]==3)
begin
o1=sw0[15:12]*10+sw0[11:8];
o2=sw0[7:4]*10+sw0[3:0];
if(o1>=o2)
begin
s=o1-o2;
h7=sw0[15:12];
h6=sw0[11:8];
h5=sw0[7:4];
h0=s%10;
h1=s/10%10;
h2=s/100%10;
h3=16;
h4=sw0[3:0];
show(h0,hex0);
show(h1,hex1);
show(h2,hex2);
show(h3,hex3);
show(h4,hex4);
show(h5,hex5);
show(h6,hex6);
show(h7,hex7);
end
else
begin
s=o2-o1;
h7=sw0[15:12];
h6=sw0[11:8];
h5=sw0[7:4];
h0=s%10;
h1=s/10%10;
h2=s/100%10;
h3=10;
h4=sw0[3:0];
show(h0,hex0);
show(h1,hex1);
show(h2,hex2);
show(h3,hex3);
show(h4,hex4);
show(h5,hex5);
show(h6,hex6);
show(h7,hex7);
end
end
end
task show;
input reg[3:0] decc;
output reg[6:0] out;
if(decc==0) out=7'b1000000;
else if(decc==1) out=7'b1111001;
else if(decc==2) out=7'b0100100;
else if(decc==3) out=7'b0110000;
else if(decc==4) out=7'b0011001;
else if(decc==5) out=7'b0010010;
else if(decc==6) out=7'b0000010;
else if(decc==7) out=7'b1111000;
else if(decc==8) out=7'b0000000;
else if(decc==9) out=7'b0011000;
else if(decc==10)out=7'b0111111;
else out=7'b1111111;
endtask
endmodule
|
