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//////////////////////////////////////////////////////////////////////
////                                                              ////
////  ps2_io_ctrl.v                                               ////
////                                                              ////
////  This file is part of the "ps2" project                      ////
////  http://www.opencores.org/cores/ps2/                         ////
////                                                              ////
////  Author(s):                                                  ////
////      - mihad@opencores.org                                   ////
////      - Miha Dolenc                                           ////
////                                                              ////
////  All additional information is avaliable in the README.txt   ////
////  file.                                                       ////
////                                                              ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
////                                                              ////
//// Copyright (C) 2000 Miha Dolenc, mihad@opencores.org          ////
////                                                              ////
//// This source file may be used and distributed without         ////
//// restriction provided that this copyright statement is not    ////
//// removed from the file and that any derivative work contains  ////
//// the original copyright notice and the associated disclaimer. ////
////                                                              ////
//// This source file is free software; you can redistribute it   ////
//// and/or modify it under the terms of the GNU Lesser General   ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any   ////
//// later version.                                               ////
////                                                              ////
//// This source is distributed in the hope that it will be       ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
//// PURPOSE.  See the GNU Lesser General Public License for more ////
//// details.                                                     ////
////                                                              ////
//// You should have received a copy of the GNU Lesser General    ////
//// Public License along with this source; if not, download it   ////
//// from http://www.opencores.org/lgpl.shtml                     ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
//
// CVS Revision History
//
// $Log: not supported by cvs2svn $
// Revision 1.1.1.1  2002/02/18 16:16:56  mihad
// Initial project import - working
//
//
 
// synopsys translate_off
`include "timescale.v"
// synopsys translate_on
 
module ps2_io_ctrl
(
    clk_i,
    rst_i,
    ps2_ctrl_kbd_clk_en_i_,
    ps2_ctrl_kbd_data_en_i_,
    ps2_kbd_clk_pad_i,
    ps2_kbd_clk_pad_oe_o,
    ps2_kbd_data_pad_oe_o,
    inhibit_kbd_if_i,
    ps2_ctrl_kbd_clk_o
);
 
input clk_i,
      rst_i,
      ps2_ctrl_kbd_clk_en_i_,
      ps2_ctrl_kbd_data_en_i_,
      ps2_kbd_clk_pad_i,
      inhibit_kbd_if_i ;
 
output ps2_kbd_clk_pad_oe_o,
       ps2_kbd_data_pad_oe_o,
       ps2_ctrl_kbd_clk_o ;
 
reg    ps2_kbd_clk_pad_oe_o,
       ps2_kbd_data_pad_oe_o ;
 
always@(posedge clk_i or posedge rst_i)
begin
    if ( rst_i )
    begin
        ps2_kbd_clk_pad_oe_o  <= #1 1'b0 ;
        ps2_kbd_data_pad_oe_o <= #1 1'b0 ;
    end
    else
    begin
        ps2_kbd_clk_pad_oe_o  <= #1 !ps2_ctrl_kbd_clk_en_i_ || inhibit_kbd_if_i ;
        ps2_kbd_data_pad_oe_o <= #1 !ps2_ctrl_kbd_data_en_i_ ;
    end
end
 
reg inhibit_kbd_if_previous ;
always@(posedge clk_i or posedge rst_i)
begin
    if ( rst_i )
        inhibit_kbd_if_previous <= #1 1'b1 ;
    else
        inhibit_kbd_if_previous <= #1 inhibit_kbd_if_i ;
end
 
assign ps2_ctrl_kbd_clk_o = ps2_kbd_clk_pad_i || ps2_kbd_clk_pad_oe_o && inhibit_kbd_if_previous ;
endmodule // ps2_io_ctrl

Line No.	Rev	Author	Line
1	746	lampret	`//////////////////////////////////////////////////////////////////////`
2			`//// ////`
3			`//// ps2_io_ctrl.v ////`
4			`//// ////`
5			`//// This file is part of the "ps2" project ////`
6			`//// http://www.opencores.org/cores/ps2/ ////`
7			`//// ////`
8			`//// Author(s): ////`
9			`//// - mihad@opencores.org ////`
10			`//// - Miha Dolenc ////`
11			`//// ////`
12			`//// All additional information is avaliable in the README.txt ////`
13			`//// file. ////`
14			`//// ////`
15			`//// ////`
16			`//////////////////////////////////////////////////////////////////////`
17			`//// ////`
18			`//// Copyright (C) 2000 Miha Dolenc, mihad@opencores.org ////`
19			`//// ////`
20			`//// This source file may be used and distributed without ////`
21			`//// restriction provided that this copyright statement is not ////`
22			`//// removed from the file and that any derivative work contains ////`
23			`//// the original copyright notice and the associated disclaimer. ////`
24			`//// ////`
25			`//// This source file is free software; you can redistribute it ////`
26			`//// and/or modify it under the terms of the GNU Lesser General ////`
27			`//// Public License as published by the Free Software Foundation; ////`
28			`//// either version 2.1 of the License, or (at your option) any ////`
29			`//// later version. ////`
30			`//// ////`
31			`//// This source is distributed in the hope that it will be ////`
32			`//// useful, but WITHOUT ANY WARRANTY; without even the implied ////`
33			`//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////`
34			`//// PURPOSE. See the GNU Lesser General Public License for more ////`
35			`//// details. ////`
36			`//// ////`
37			`//// You should have received a copy of the GNU Lesser General ////`
38			`//// Public License along with this source; if not, download it ////`
39			`//// from http://www.opencores.org/lgpl.shtml ////`
40			`//// ////`
41			`//////////////////////////////////////////////////////////////////////`
42			`//`
43			`// CVS Revision History`
44			`//`
45			`// $Log: not supported by cvs2svn $`
46			`// Revision 1.1.1.1 2002/02/18 16:16:56 mihad`
47			`// Initial project import - working`
48			`//`
49			`//`
50
51			`// synopsys translate_off`
52			`include "timescale.v"
53			`// synopsys translate_on`
54
55			`module ps2_io_ctrl`
56			`(`
57			`clk_i,`
58			`rst_i,`
59			`ps2_ctrl_kbd_clk_en_i_,`
60			`ps2_ctrl_kbd_data_en_i_,`
61			`ps2_kbd_clk_pad_i,`
62			`ps2_kbd_clk_pad_oe_o,`
63			`ps2_kbd_data_pad_oe_o,`
64			`inhibit_kbd_if_i,`
65			`ps2_ctrl_kbd_clk_o`
66			`);`
67
68			`input clk_i,`
69			`rst_i,`
70			`ps2_ctrl_kbd_clk_en_i_,`
71			`ps2_ctrl_kbd_data_en_i_,`
72			`ps2_kbd_clk_pad_i,`
73			`inhibit_kbd_if_i ;`
74
75			`output ps2_kbd_clk_pad_oe_o,`
76			`ps2_kbd_data_pad_oe_o,`
77			`ps2_ctrl_kbd_clk_o ;`
78
79			`reg ps2_kbd_clk_pad_oe_o,`
80			`ps2_kbd_data_pad_oe_o ;`
81
82			`always@(posedge clk_i or posedge rst_i)`
83			`begin`
84			`if ( rst_i )`
85			`begin`
86			`ps2_kbd_clk_pad_oe_o <= #1 1'b0 ;`
87			`ps2_kbd_data_pad_oe_o <= #1 1'b0 ;`
88			`end`
89			`else`
90			`begin`
91			`ps2_kbd_clk_pad_oe_o <= #1 !ps2_ctrl_kbd_clk_en_i_ \|\| inhibit_kbd_if_i ;`
92			`ps2_kbd_data_pad_oe_o <= #1 !ps2_ctrl_kbd_data_en_i_ ;`
93			`end`
94			`end`
95
96			`reg inhibit_kbd_if_previous ;`
97			`always@(posedge clk_i or posedge rst_i)`
98			`begin`
99			`if ( rst_i )`
100			`inhibit_kbd_if_previous <= #1 1'b1 ;`
101			`else`
102			`inhibit_kbd_if_previous <= #1 inhibit_kbd_if_i ;`
103			`end`
104
105			`assign ps2_ctrl_kbd_clk_o = ps2_kbd_clk_pad_i \|\| ps2_kbd_clk_pad_oe_o && inhibit_kbd_if_previous ;`
106			`endmodule // ps2_io_ctrl`

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[/] [or1k/] [tags/] [first/] [orp/] [orp_soc/] [rtl/] [verilog/] [ps2.old/] [ps2_io_ctrl.v] - Blame information for rev 1765