题解 | #整数倍数据位宽转换8to16#

`timescale 1ns/1ns

module width_8to16(
	input 				   clk 		,   
	input 				   rst_n		,
	input				      valid_in	,
	input	   [7:0]		   data_in	,
 
 	output	reg			valid_out,
	output   reg [15:0]	data_out
);

	reg [1:0] cnt;
	always @(posedge clk or negedge rst_n) begin
		if(!rst_n) begin
			cnt <= 0;
		end
		else if(valid_in) begin
			if (cnt == 2) begin
				cnt <= 1;
			end
			else begin
				cnt <= cnt + 1'b1;
			end
		end
		else begin
			cnt <= cnt;
		end
	end

	always @(posedge clk or negedge rst_n) begin
		if(!rst_n) begin
			valid_out <= 0;
		end
		else if(valid_in && cnt == 1) begin
			valid_out <= 1;
		end
		else begin
			valid_out <= 0;
		end
	end

	reg [7:0] data_reg;
	always @(posedge clk or negedge rst_n) begin
		if(!rst_n) begin
			data_reg <= 0;
		end
		else if(valid_in) begin
			data_reg <= data_in;
		end
		else begin
			data_reg <= data_reg;
		end
	end

	always @(posedge clk or negedge rst_n) begin
		if(!rst_n) begin
			data_out <= 0;
		end
		else if(valid_in && cnt == 1) begin
			data_out <= {data_reg,data_in};
		end
		else begin
			data_out <= data_out;
		end
	end



endmodule