decode.v

可以对输入时钟任意分频(整数或小数),带Quartus II 完整项目文件.

/*
--------------------------------------------------------------------
File Name : decode.v
Programmer(s) : woailiushui [e-mail]
Commany : IOEMCT OF TJU
Created : 2006/05/09
Description :  The program for frequency divide, distribute the odde and fraction.
   vel : The input parameter of coefficient 
         High 8 bit is the integer, low 1 bit denote fraction
Modified History :
	Modified :
	Programmer :
	Description :
--------------------------------------------------------------------
*/
 
module decode
(
	clk, reset, vel, odde, fraction, clr, coef_i
);

	input clk;
	input reset;
	input [8:0] vel;
	output odde;
	output fraction;
	output clr;
	output [7:0] coef_i;

	//1 odd   0 even
	assign odde = (vel[1] == 1'b1)?1'b1:1'b0;   

    //1 fraction  0 no fraction
	assign fraction = (vel[0] == 1'b1)?1'b1:1'b0;   

	assign coef_i = vel[8:1];

	assign clr = (~reset)?1'b0:1'b1;

endmodule