数码管的动态显示（四）

1.原理

2.代码

2.1 seg_595_dynamic.v

module seg_595_dynamic(
	input wire				sys_clk			,
	input wire      		sys_rst_n		,
	input wire[19:0]		data			,
	input wire[5:0]			point			,
	input wire 				sign			,
	input wire 				seg_en			,

	output	wire 			ds				,
	output wire 			oe				,
	output wire 			shcp			,
	output wire 			stcp		
);


wire [15:0]  sel;
wire [7:0]	 seg;

seg_dynamic seg_dynamic_inst(
	.sys_clk	(sys_clk	)	,
	.sys_rst_n	(sys_rst_n	),
	.data		(data		),
	.point		(point		),
	.sign		(sign		),
	.seg_en		(seg_en		),
	
	.seg		(seg		)	,
	.sel 		(sel 		)	
);


hc595_ctrl hc595_ctrl_inst(
	.sys_clk	(sys_clk	)	,
	.sys_rst_n	(sys_rst_n	),
	.sel		(sel		)	,
	.seg		(seg		)	,
	             
	.ds			(ds			),
	.shcp		(shcp		),
	.stcp		(stcp		),
	.oe		    (oe		   )
);

endmodule

2.2 top_seg_595.v

module top_seg_595(
	input wire 		sys_clk		,
	input wire 		sys_rst_n	,
	
	output wire 	ds			,
	output wire 	oe			,
	output wire 	shcp		,
	output wire 	stcp
);

wire [19:0] data;
wire [5:0] point;
wire sign;
wire seg_en;

data_gen#(
	.CNT_MAX (23'd4999_999),
	.DATA_MAX (20'd999_999)
)
data_gen_inst
(
	.sys_clk	(sys_clk	)	,
	.sys_rst_n	(sys_rst_n	),
	             
	.data		(data		),
	.point		(point		),
	.sign		(sign		),
	.seg_en     (seg_en    )
);


seg_595_dynamic seg_595_dynamic_inst(
	.sys_clk		(sys_clk	)	,
	.sys_rst_n		(sys_rst_n	),
	.data			(data		),
	.point			(point		),
	.sign			(sign		),
	.seg_en			(seg_en		),
				  
	.ds				(ds			),
	.oe				(oe			),
	.shcp			(shcp		),
	.stcp		   ( stcp		)
);


endmodule

2.3 tb_top_seg_595.v

`timescale 1ns/1ns
module tb_top_seg_595();

reg sys_clk;
reg sys_rst_n;
wire ds	  ;
wire oe	  ;
wire shcp  ;
wire stcp  ;

initial 
	begin
		sys_clk=1'b1;
		sys_rst_n<=1'b0;
		#20
		sys_rst_n<=1'b1;
	end
	
always #10 sys_clk=~sys_clk;
	
defparam top_seg_595_inst.data_gen_inst.CNT_MAX=23'd49;
defparam top_seg_595_inst.seg_595_dynamic_inst.seg_dynamic_inst.CNT_MAX=16'd19;



top_seg_595 top_seg_595_inst(
	.sys_clk	(sys_clk	)	,
	.sys_rst_n	(sys_rst_n	),
	             
	.ds			(ds			),
	.oe			(oe			),
	.shcp		(shcp		),
	.stcp       (stcp      )
);	
endmodule

ds信号一致