function ascii2sc (x : hbyte) return hbyte;
function valid_char (x : hbyte) return boolean;
+ function zeile2char(i : std_logic_vector; stelle : natural) return hbyte;
-- http://www.marjorie.de/ps2/scancode-set2.htm
constant SC_KP_0 : hbyte := x"70";
end case;
return y;
end function;
+
+ function zeile2char(i : std_logic_vector; stelle : natural) return hbyte is
+ subtype zeilnum is string(1 to 2);
+ type zeilnum_arr is array (natural range 0 to 49) of zeilnum;
+ constant zn : zeilnum_arr := (
+ 0 => "00", 1 => "01", 2 => "02", 3 => "03", 4 => "04",
+ 5 => "05", 6 => "06", 7 => "07", 8 => "08", 9 => "09",
+ 10 => "10", 11 => "11", 12 => "12", 13 => "13", 14 => "14",
+ 15 => "15", 16 => "16", 17 => "17", 18 => "18", 19 => "19",
+ 20 => "20", 21 => "21", 22 => "22", 23 => "23", 24 => "24",
+ 25 => "25", 26 => "26", 27 => "27", 28 => "28", 29 => "29",
+ 30 => "30", 31 => "31", 32 => "32", 33 => "33", 34 => "34",
+ 35 => "35", 36 => "36", 37 => "37", 38 => "38", 39 => "39",
+ 40 => "40", 41 => "41", 42 => "42", 43 => "43", 44 => "44",
+ 45 => "45", 46 => "46", 47 => "47", 48 => "48", 49 => "49",
+ others => "xy");
+ variable t : signed(hzeile'length downto 0);
+ begin
+ t := signed('0' & i);
+ t := t / 2;
+ return hbyte(to_unsigned(character'pos(zn(to_integer(t))(stelle)),8));
+ end;
end package body gen_pkg;