/*********************************************************************************

 * Company                    :

 * Engineer                    : 空气微凉

 *

 * Create Date                : 00:00:00 22/03/2013

 * Design Name                :

 * Module Name                :

 * Project Name                :

 * Target Devices            :

 * Tool versions                :

 * Description                :

 *                                   http://www.cnblogs.com/kongqiweiliang/

 * Dependencies                :

 *                                Avalon_MM_Slave_IP

 * Revision                    :

 * Revision                    : 0.01 - File Created

 * Additional Comments        :

 ********************************************************************************/

 `timescale 1ns/1ps

 `define    UD  #

 /*******************************************************************************/

 module Avalon_MM_Slave_KEY_LED

 (

     //clock input

     input                                         icsi_clk            ,//

     input                                         ireset_n             ,//

     //Avalon_MM_Slave interface

     input                                         iavs_chipselect        ,//片选信号

     input                                        iavs_address        ,//地址,译码后确定寄存器offset

     input                                         iavs_write            ,//写使能信号

     input                            [:]         iavs_writedata        ,//32位写数据值

     input                                         iavs_read            ,//读时能信号

     output  reg                        [:]         oavs_readdata        ,//32位读数据值

     input                            [ :]        iavs_byteenable        ,//字节使能信号

     //hardware interface(Conduit End)

     input                            [:]        iavs_export_KEY        ,//

     output  reg                        [:]        oavs_export_LEDR     //

 );

 //-------------------------------------------------------------------------------

 //

 reg  [:]  oavs_export_LEDR_N;

 always@(posedge icsi_clk or negedge ireset_n)begin

     if(!ireset_n)

         oavs_export_LEDR <= 'h0;

     else

         oavs_export_LEDR <= oavs_export_LEDR_N;

 end

 always@(*)begin

     if(iavs_chipselect && iavs_write && (iavs_address == 'h0))

         oavs_export_LEDR_N = iavs_writedata[:];

     else

         oavs_export_LEDR_N = oavs_export_LEDR;

 end

 //

 reg  [:]  oavs_readdata_N;

 always@(posedge icsi_clk or negedge ireset_n)begin

     if(!ireset_n)

         oavs_readdata <= 'h0;

     else

         oavs_readdata <= oavs_readdata_N;

 end

 always@(*)begin

     if(iavs_chipselect && iavs_read && (iavs_address == 'h1))

         oavs_readdata_N = iavs_export_KEY;

     else

         oavs_readdata_N = oavs_readdata;

 end

 //-------------------------------------------------------------------------------

 endmodule 

 /*********************************************************************************

 * Company                   :

 * Engineer                  : 空气微凉

 *

 * Create Date               : 00:00:00 22/03/2013

 * Design Name               :

 * Module Name               :

 * Project Name              :

 * Target Devices            :

 * Tool versions             :

 * Description               :

 *

 * Dependencies              :

 *

 * Revision                  :

 * Revision                  : 0.01 - File Created

 * Additional Comments       :

 ********************************************************************************/

 #include <stdio.h>

 #include <string.h>

 #include "system.h"

 #include "altera_avalon_pio_regs.h"

 #include "alt_types.h"

 #include "unistd.h"

 #define  LED(data)      IOWR(KEY_LED_BASE, 0, data)

 #define  KEY            IORD(KEY_LED_BASE, 1) 

 unsigned int i;

 int main(void)

 {

     while()

     {

         i = KEY;

         LED(i);

     }

 }