verilog数字系统设计教程-夏宇闻编著-课后习题答案-考试重点.docx

-CAL-FENGHAI.NetworkInformationTechnologyCompany.2020YEAR

-CAL-FENGHAI.NetworkInformationTechnologyCompany.2020YEAR

verilog数字系统设计教程-夏宇闻编著-课后习题答案-考试重点

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练习21/2分频，相位相反

练习3

利用10MB的时钟设计一个单周期形状的周期波形。设计框图要求使用Visio画图设计代码

modulezhouqiwave(reset,F10M,a);

inputreset,F10M;

outputa;

rega;

reg[15:0]b;

always@(resetorposedgeF10M)

if(!reset)

begin

a=0;

b=0;

end

elsebegin

if(b==199)

begin

a=~a;

b=b+1;

end

elsebegin

if(b==299)

begin

a=~a;

b=b+1;

end

if(b==499)

begin

a=0;

b=b+1;

end

elseb=b+1;

end

endendmodule

仿真代码`

timescale10ns/10ns

modulezhouqiwave_tb;

regF10M,reset;

wirea;

always#5F10M=~F10M;

initial

begin

reset=0;

F10M=0;

#5reset=1;

#6000$stop;

end

zhouqiwavem(.reset(reset),.F10M(F10M),.a(a));

endmodule