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[/] [z80soc/] [tags/] [z80soc05b/] [rtl/] [VHDL/] [PS2/] [ps2bkd.vhd] - Blame information for rev 33

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1 2 rrred 
library IEEE;
2 
use IEEE.std_logic_1164.all;
3 
 
4 
entity  ps2kbd is
5 
        PORT (
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                        keyboard_clk    : inout std_logic;
7 
                        keyboard_data   : inout std_logic;
8 
                        clock                   : in std_logic;
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                        reset                   : in std_logic;
10 
                        read                    : in std_logic;
11 
                        scan_ready              : out std_logic;
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                        ps2_ascii_code  : out std_logic_vector(7 downto 0));
13 
end ps2kbd;
14 
 
15 
architecture rtl of ps2kbd is
16 
 
17 6 rrred 
signal scan_code_sig            : std_logic_vector(7 downto 0);
18 
signal scode_shf_sig            : std_logic_vector(11 downto 0);
19 2 rrred 
 
20 
begin
21 
 
22 6 rrred 
scode_shf_sig <= "0000" & scan_code_sig;
23 
 
24 
ps2_ascii_decode : process(scode_shf_sig)
25 2 rrred 
begin
26 6 rrred 
  case scode_shf_sig is
27 
    when x"066" => ps2_ascii_code <= x"08";  -- Backspace ("backspace" key)
28 
    when x"00d" => ps2_ascii_code <= x"09";  -- Horizontal Tab
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    when x"05a" => ps2_ascii_code <= x"0d";  -- Carriage return ("enter" key)
30 
    when x"076" => ps2_ascii_code <= x"1b";  -- Escape ("esc" key)
31 
    when x"029" => ps2_ascii_code <= x"20";  -- Space
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    when x"116" => ps2_ascii_code <= x"21";  -- !
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    when x"152" => ps2_ascii_code <= x"22";  -- "
34 
    when x"126" => ps2_ascii_code <= x"23";  -- #
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    when x"125" => ps2_ascii_code <= x"24";  -- $
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    when x"12e" => ps2_ascii_code <= x"25";  --
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    when x"13d" => ps2_ascii_code <= x"26";  --
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    when x"052" => ps2_ascii_code <= x"27";  --
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    when x"146" => ps2_ascii_code <= x"28";  --
40 
    when x"145" => ps2_ascii_code <= x"29";  --
41 
    when x"13e" => ps2_ascii_code <= x"2a";  -- *
42 
    when x"155" => ps2_ascii_code <= x"2b";  -- +
43 
    when x"041" => ps2_ascii_code <= x"2c";  -- ,
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    when x"04e" => ps2_ascii_code <= x"2d";  -- -
45 
    when x"049" => ps2_ascii_code <= x"2e";  -- .
46 
    when x"04a" => ps2_ascii_code <= x"2f";  -- /
47 
    when x"045" => ps2_ascii_code <= x"30";  -- 0
48 
    when x"016" => ps2_ascii_code <= x"31";  -- 1
49 
    when x"01e" => ps2_ascii_code <= x"32";  -- 2
50 
    when x"026" => ps2_ascii_code <= x"33";  -- 3
51 
    when x"025" => ps2_ascii_code <= x"34";  -- 4
52 
    when x"02e" => ps2_ascii_code <= x"35";  -- 5
53 
    when x"036" => ps2_ascii_code <= x"36";  -- 6
54 
    when x"03d" => ps2_ascii_code <= x"37";  -- 7
55 
    when x"03e" => ps2_ascii_code <= x"38";  -- 8
56 
    when x"046" => ps2_ascii_code <= x"39";  -- 9
57 
    when x"14c" => ps2_ascii_code <= x"3a";  -- :
58 
    when x"04c" => ps2_ascii_code <= x"3b";  -- ;
59 
    when x"141" => ps2_ascii_code <= x"3c";  -- <
60 
    when x"055" => ps2_ascii_code <= x"3d";  -- =
61 
    when x"149" => ps2_ascii_code <= x"3e";  -- >
62 
    when x"14a" => ps2_ascii_code <= x"3f";  -- ?
63 
    when x"11e" => ps2_ascii_code <= x"40";  -- @
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    when x"01c" => ps2_ascii_code <= x"41";  -- A
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    when x"032" => ps2_ascii_code <= x"42";  -- B
66 
    when x"021" => ps2_ascii_code <= x"43";  -- C
67 
    when x"023" => ps2_ascii_code <= x"44";  -- D
68 
    when x"024" => ps2_ascii_code <= x"45";  -- E
69 
    when x"02b" => ps2_ascii_code <= x"46";  -- F
70 
    when x"034" => ps2_ascii_code <= x"47";  -- G
71 
    when x"033" => ps2_ascii_code <= x"48";  -- H
72 
    when x"043" => ps2_ascii_code <= x"49";  -- I
73 
    when x"03b" => ps2_ascii_code <= x"4a";  -- J
74 
    when x"042" => ps2_ascii_code <= x"4b";  -- K
75 
    when x"04b" => ps2_ascii_code <= x"4c";  -- L
76 
    when x"03a" => ps2_ascii_code <= x"4d";  -- M
77 
    when x"031" => ps2_ascii_code <= x"4e";  -- N
78 
    when x"044" => ps2_ascii_code <= x"4f";  -- O
79 
    when x"04d" => ps2_ascii_code <= x"50";  -- P
80 
    when x"015" => ps2_ascii_code <= x"51";  -- Q
81 
    when x"02d" => ps2_ascii_code <= x"52";  -- R
82 
    when x"01b" => ps2_ascii_code <= x"53";  -- S
83 
    when x"02c" => ps2_ascii_code <= x"54";  -- T
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    when x"03c" => ps2_ascii_code <= x"55";  -- U
85 
    when x"02a" => ps2_ascii_code <= x"56";  -- V
86 
    when x"01d" => ps2_ascii_code <= x"57";  -- W
87 
    when x"022" => ps2_ascii_code <= x"58";  -- X
88 
    when x"035" => ps2_ascii_code <= x"59";  -- Y
89 
    when x"01a" => ps2_ascii_code <= x"5a";  -- Z
90 
    when x"054" => ps2_ascii_code <= x"5b";  -- [
91 
    when x"05d" => ps2_ascii_code <= x"5c";  -- \
92 
    when x"05b" => ps2_ascii_code <= x"5d";  -- ]
93 
    when x"136" => ps2_ascii_code <= x"5e";  -- ^
94 
    when x"14e" => ps2_ascii_code <= x"5f";  -- _
95 
    when x"00e" => ps2_ascii_code <= x"60";  -- `
96 
    when x"11c" => ps2_ascii_code <= x"61";  -- a
97 
    when x"132" => ps2_ascii_code <= x"62";  -- b
98 
    when x"121" => ps2_ascii_code <= x"63";  -- c
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    when x"123" => ps2_ascii_code <= x"64";  -- d
100 
    when x"124" => ps2_ascii_code <= x"65";  -- e
101 
    when x"12b" => ps2_ascii_code <= x"66";  -- f
102 
    when x"134" => ps2_ascii_code <= x"67";  -- g
103 
    when x"133" => ps2_ascii_code <= x"68";  -- h
104 
    when x"143" => ps2_ascii_code <= x"69";  -- i
105 
    when x"13b" => ps2_ascii_code <= x"6a";  -- j
106 
    when x"142" => ps2_ascii_code <= x"6b";  -- k
107 
    when x"14b" => ps2_ascii_code <= x"6c";  -- l
108 
    when x"13a" => ps2_ascii_code <= x"6d";  -- m
109 
    when x"131" => ps2_ascii_code <= x"6e";  -- n
110 
    when x"144" => ps2_ascii_code <= x"6f";  -- o
111 
    when x"14d" => ps2_ascii_code <= x"70";  -- p
112 
    when x"115" => ps2_ascii_code <= x"71";  -- q
113 
    when x"12d" => ps2_ascii_code <= x"72";  -- r
114 
    when x"11b" => ps2_ascii_code <= x"73";  -- s
115 
    when x"12c" => ps2_ascii_code <= x"74";  -- t
116 
    when x"13c" => ps2_ascii_code <= x"75";  -- u
117 
    when x"12a" => ps2_ascii_code <= x"76";  -- v
118 
    when x"11d" => ps2_ascii_code <= x"77";  -- w
119 
    when x"122" => ps2_ascii_code <= x"78";  -- x
120 
    when x"135" => ps2_ascii_code <= x"79";  -- y
121 
    when x"11a" => ps2_ascii_code <= x"7a";  -- z
122 
    when x"154" => ps2_ascii_code <= x"7b";  -- {
123 
    when x"15d" => ps2_ascii_code <= x"7c";  -- |
124 
    when x"15b" => ps2_ascii_code <= x"7d";  -- }
125 
    when x"10e" => ps2_ascii_code <= x"7e";  -- ~
126 
    when x"071" => ps2_ascii_code <= x"7f";  -- (Delete OR DEL on numeric keypad)
127 
    when x"171" => ps2_ascii_code <= x"7f";  -- (Delete OR DEL on numeric keypad)
128 2 rrred 
    when others => ps2_ascii_code <= x"FF";  -- keys not mapped
129 
  end case;
130 
end process;
131 
 
132 
kbd_inst: work.keyboard port map (
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        keyboard_clk    => keyboard_clk,
134 
        keyboard_data   => keyboard_data,
135 
        clock                   => clock,
136 
        reset                   => reset,
137 
        read                    => read,
138 
        scan_ready              => scan_ready,
139 6 rrred 
        scan_code               => scan_code_sig
140 2 rrred 
);
141 
 
142 
end;
143 
 

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