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code2ascii.vhd
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LIBRARY ieee ;
USE ieee.std_logic_1164.all ;
entity code2ascii is
port (
capital_en : in std_logic;
key_code : in std_logic_vector(15 downto 0);
key_ascii : out std_logic_vector(7 downto 0)
);
end code2ascii;
architecture tradution of code2ascii is
signal capsnkey : std_logic_vector (19 downto 0);
begin
capsnkey <= "000" & capital_en & key_code;
with capsnkey select
key_ascii <= -- a - z
x"61" when x"0001C",
x"62" when x"00032",
x"63" when x"00021",
x"64" when x"00023",
x"65" when x"00024",
x"66" when x"0002B",
x"67" when x"00034",
x"68" when x"00033",
x"69" when x"00043",
x"6A" when x"0003B",
x"6B" when x"00042",
x"6C" when x"0004B",
x"6D" when x"0003A",
x"6E" when x"00031",
x"6F" when x"00044",
x"70" when x"0004D",
x"71" when x"00015",
x"72" when x"0002D",
x"73" when x"0001B",
x"74" when x"0002C",
x"75" when x"0003C",
x"76" when x"0002A",
x"77" when x"0001D",
x"78" when x"00022",
x"79" when x"00035",
x"7A" when x"0001A",
-- 0 - 9 (teclado)
x"30" when x"00045",
x"31" when x"00016",
x"32" when x"0001E",
x"33" when x"00026",
x"34" when x"00025",
x"35" when x"0002E",
x"36" when x"00036",
x"37" when x"0003D",
x"38" when x"0003E",
x"39" when x"00046",
-- 0 - 9 (keypad)
x"30" when x"00070",
x"31" when x"00069",
x"32" when x"00072",
x"33" when x"0007A",
x"34" when x"0006B",
x"35" when x"00073",
x"36" when x"00074",
x"37" when x"0006C",
x"38" when x"00075",
x"39" when x"0007D",
-- A - Z (Capital)
x"41" when x"1001C",
x"42" when x"10032",
x"43" when x"10021",
x"44" when x"10023",
x"45" when x"10024",
x"46" when x"1002B",
x"47" when x"10034",
x"48" when x"10033",
x"49" when x"10043",
x"4A" when x"1003B",
x"4B" when x"10042",
x"4C" when x"1004B",
x"4D" when x"1003A",
x"4E" when x"10031",
x"4F" when x"10044",
x"50" when x"1004D",
x"51" when x"10015",
x"52" when x"1002D",
x"53" when x"1001B",
x"54" when x"1002C",
x"55" when x"1003C",
x"56" when x"1002A",
x"57" when x"1001D",
x"58" when x"10022",
x"59" when x"10035",
x"5A" when x"1001A",
-- 0 - 9 (teclada com Capital ativo)
x"30" when x"10045",--0
x"31" when x"10016",--1
x"32" when x"1001E",--2
x"33" when x"10026",--3
x"34" when x"10025",--4
x"35" when x"1002E",--5
x"36" when x"10036",--6
x"37" when x"1003D",--7
x"38" when x"1003E",--8
x"39" when x"10046",--9
-- 0 - 9 (keypad com Capital ativo)
x"30" when x"10070",--0
x"31" when x"10069",--1
x"32" when x"10072",--2
x"33" when x"1007A",--3
x"34" when x"1006B",--4
x"35" when x"10073",--5
x"36" when x"10074",--6
x"37" when x"1006C",--7
x"38" when x"10075",--8
x"39" when x"1007D",--9
-- tecla Enter
x"0D" when x"1005A", -- Com capital
x"0D" when x"0005A", -- Sem capital
x"0D" when x"1E05A", -- KP com capital
x"0D" when x"0E05A", -- KP sem capital
-- Arrows
--cima
x"0F" when x"1E075", -- Com capital
x"0F" when x"0E075", -- Sem capital
--esquerda
x"0A" when x"1E06B", -- com capital
x"0A" when x"0E06B", -- sem capital
--direita
x"0B" when x"1E074", -- Com capital
x"0B" when x"0E074", -- Sem capital
--baixo
x"0C" when x"1E072", -- com capital
x"0C" when x"0E072", -- sem capital
x"00" when others;
end tradution;