keyboard_avalon_interface.v

周立功公司的SOPC源代码

/****************************************Copyright (c)**************************************************
**                               Guangzou ZLG-MCU Development Co.,LTD.
**                                      graduate school
**                                 http://www.zlgmcu.com
**
**--------------File Info-------------------------------------------------------------------------------
** File name:			keyboard_avalon_interface.v
** Last modified Date:	2006-04-14
** Last Version:		1.0
** Descriptions:		keyboard logic
**------------------------------------------------------------------------------------------------------
** Created by:			RuiWenBin
** Created date:		2006-04-14
** Version:				1.0
** Descriptions:		
**
**------------------------------------------------------------------------------------------------------
** Modified by:			
** Modified date:		
** Version:				
** Descriptions:		
**
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/

module keyboard_avalon_interface(
	//Avalon Signals
	clock,
	reset_n,
	chip_select,
	address,
	write,
	write_data,
	read,
	read_data,
	interrupt,
	
	//keyboard Output Signals
	ps2_clk,
	ps2_data

 );

		//Avalon_Slave_pled Avalon I/O
		input 			clock;		 	//System clock - tied to all blocks
		input 			reset_n;		//System reset - tied to all blocks
		input 			chip_select;	//Avalon Chip select
		input  			address;	    //Avalon Address bus 
		input 			write;			//Avalon Write signal
		input [31:0]	write_data;		//Avalon Write data bus
		input 			read;		    //Avalon Read signal
			
		output [31:0]	read_data;		//Avalon Read data bus
		output 			interrupt;		//System interrupt
		
		//Avalon_Slave_keyboard Exported I/O
		inout			ps2_clk;
		inout			ps2_data;
					
		wire			rx_extended;
		wire			rx_released;
		wire			rx_shift_key_on;
		wire[7:0]		rx_scan_code;	
		wire[7:0]		rx_ascii;
		wire			rx_data_ready;
		wire			tx_write_ack;
		wire			tx_error_no_keyboard_ack;
		wire[7:0]		tx_data;
		wire			tx_write;
		wire			rx_read;
		wire			reset;
		wire			ps2_clk_in;
		wire			ps2_clk_out;
		wire			ps2_clk_dir;
		wire			ps2_data_in;
		wire			ps2_data_out;
		wire			ps2_data_dir;


assign ps2_clk = (ps2_clk_dir) ? ps2_clk_out : 1'bz;
assign ps2_data = (ps2_data_dir) ? ps2_data_out : 1'bz;
assign ps2_clk_in = ps2_clk;
assign ps2_data_in = ps2_data;
		
//keyboard Instance
ps2_keyboard_interface u1(
	    .clock(clock ),
	    //********************
	    .rx_read(rx_read),
	    .reset(reset),
		.tx_write(tx_write),
		.tx_data(tx_data),
		.rx_extended(rx_extended),
		.rx_released(rx_released),
		.rx_shift_key_on(rx_shift_key_on),
		.rx_scan_code(rx_scan_code),
		.rx_ascii(rx_ascii),
		.rx_data_ready(rx_data_ready),
		.tx_write_ack(tx_write_ack),
		.tx_error_no_keyboard_ack(tx_error_no_keyboard_ack),
		//********************
		.ps2_clk_in(ps2_clk_in),
		.ps2_clk_out(ps2_clk_out),
		.ps2_clk_dir(ps2_clk_dir),
		.ps2_data_in(ps2_data_in),
		.ps2_data_out(ps2_data_out),
		.ps2_data_dir(ps2_data_dir)
		);

//Register File instance
keyboard_register_file u2(	
		.clock(clock),
		.reset_n(reset_n),
		.chip_select(chip_select),
		.address(address),
		.write(write),
		.write_data(write_data),
		.read(read),
		.read_data(read_data),
		.interrupt(interrupt),
		//********************
	    .rx_read(rx_read),
	    .reset(reset),
		.tx_write(tx_write),
		.tx_data(tx_data),
		.rx_extended(rx_extended),
		.rx_released(rx_released),
		.rx_shift_key_on(rx_shift_key_on),
		.rx_scan_code(rx_scan_code),
		.rx_ascii(rx_ascii),
		.rx_data_ready(rx_data_ready),
		.tx_write_ack(tx_write_ack),
		.tx_error_no_keyboard_ack(tx_error_no_keyboard_ack)
		);

endmodule