?? int_div.v.bak
字號:
module int_div(clk_in,clk_out);
input clk_in;
output clk_out;
reg[div_width-1:0] counter1;
reg[div_width-1:0] counter2;
reg[div_width-1:0] counter3;
reg clk_temp1;
reg clk_temp2;
reg clk_temp3;
parameter diver=24000000;
parameter div_width=25;
assign clk_out=(diver%2==0)? clk_temp1:(clk_temp2|clk_temp3);
always@(posedge clk_in)
begin
if(counter1==diver-1)
counter1<=0;
else
begin
counter1<=counter1+1'b1;
end
end
always@(posedge clk_in)
begin
if(counter1<=(diver/2)-1)
clk_temp1<=1'b1;
else
clk_temp1<=1'b0;
end
always@(posedge clk_in)
begin
if(counter2==diver-1)
counter2<=0;
else
counter2<=counter2+1'b1;
end
always@(posedge clk_in)
begin
if(counter2<(diver-1)/2)
clk_temp2<=1'b1;
else
clk_temp2<=1'b0;
end
always@(negedge clk_in)
begin
if(counter3==diver-1)
counter3<=0;
else
counter3<=counter3+1'b1;
end
always@(negedge clk_in)
begin
if(counter3<(diver-1)/2)
clk_temp3<=1'b1;
else
clk_temp3<=1'b0;
end
endmodule
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