URL https://opencores.org/ocsvn/qaz_libs/qaz_libs/trunk

Subversion Repositories qaz_libs

[/] [qaz_libs/] [trunk/] [BFM/] [src/] [clock/] [tb_programmable_clk.v] - Blame information for rev 49

Line No.	Rev	Author	Line
1	34	qaztronic	`// --------------------------------------------------------------------`
2			`//`
3			`// --------------------------------------------------------------------`
4
5			`timescale 10ps/1ps
6
7
8			`module`
9			`tb_programmable_clk`
10			`(`
11			`output reg clock`
12			`);`
13
14
15			`// --------------------------------------------------------------------`
16			`//`
17			`integer clk_duty_cycle = 50;`
18
19			`task set_clk_duty_cycle;`
20			`input integer duty_cycle;`
21			`begin`
22
23			`clk_duty_cycle = duty_cycle;`
24
25			`end`
26			`endtask`
27
28
29			`// --------------------------------------------------------------------`
30			`//`
31			`integer clk_period = 1515;`
32
33			`task set_clk_period;`
34			`input integer period;`
35			`begin`
36
37			`clk_period = period;`
38
39			`end`
40			`endtask`
41
42
43			`// --------------------------------------------------------------------`
44			`//`
45			`initial`
46			`clock <= 1'b1;`
47
48			`always`
49			`if(clk_duty_cycle == 50)`
50			`#(clk_period/2) clock <= ~clock;`
51			`else`
52			`if(clock)`
53			`#(clk_period * (clk_duty_cycle/100)) clock <= ~clock;`
54			`else`
55			`#(clk_period * ( (100 - clk_duty_cycle)/100 ) ) clock <= ~clock;`
56
57
58			`endmodule`
59