freq2_2.v.bak

奇数分频:2.2倍分频,其他任意奇数倍的分频可扩展得到.

module	freq2_2(//input
				clk,
				//output
				freq2_2
				);
				
input			clk;
output	reg		freq2_2;

reg		[2:0]	count,freq;

always@(posedge clk)
begin
	count<=count+3'd1;
	if(freq<=3)				//4 times
		begin
			if(count==1)
				begin
				count<=0;	//freq/2
				freq2_2<=1;
				freq<=freq+3'd1;
				end
			else
				freq2_2<=0;
		end
	else if(freq==4)		//1 time
		begin
			if(count==3)	//freq/3
				begin
				count<=0;
				freq2_2<=1;
				freq<=0;
				end
			else
				freq2_2<=0;
		end
end

endmodule