图像处理：生成3×3的窗口

生成3×3的窗口

module Shift_RAM_3X3(
	//global signals
	input 					clk,						
	input 					rst_n,							
	//Image data prepred to be processd
	input					per_frame_vsync,	//Prepared Image data vsync valid signal
	input					per_frame_href,		//Prepared Image data href vaild  signal
	input					per_frame_clken,	//Prepared Image data output/capture enable clock
	input			[7:0]	per_img_Y,			//Prepared Image brightness input
	
	//Image data has been processd
	output					matrix_frame_vsync,	//Prepared Image data vsync valid signal
	output					matrix_frame_href,	//Prepared Image data href vaild  signal
	output					matrix_frame_clken,	//Prepared Image data output/capture enable clock	
		
	output 	reg 	[7:0]	matrix_p11,						
	output 	reg		[7:0]	matrix_p12,						
	output 	reg		[7:0]	matrix_p13,			//3X3 Matrix output
	output 	reg		[7:0]	matrix_p21,						
	output 	reg		[7:0]	matrix_p22,						
	output 	reg		[7:0]	matrix_p23,						
	output 	reg		[7:0]	matrix_p31,						
	output 	reg		[7:0]	matrix_p32,						
	output 	reg		[7:0]	matrix_p33					
    );
	
	//----------------------------------------------
	//consume 1clk
	wire 	[7:0] 	row1_data;//frame data of the 1th row
	wire 	[7:0]	row2_data;//frame data of the 2th row
	reg 	[7:0] 	row3_data;//frame data of the 3th row

// ====================================================================================================	
// 得到一个3×n的矩阵
// ====================================================================================================
	
// 将正在输入的Y值给data_3，data_3一直在最上面那一行
	always @(posedge clk or negedge rst_n)begin
		if(!rst_n)
			row3_data