pc-com: zeilennummer auch ausgeben

[hwmod.git] / src / gen_pkg.vhd

diff --git a/src/gen_pkg.vhd b/src/gen_pkg.vhd
index dfe664c1fb05b077a27ef2e4ae84de0cf9bb117c..f8a2963d90405aea55fe3bd4271915482288685a 100644 (file)
--- a/src/gen_pkg.vhd
+++ b/src/gen_pkg.vhd
@@ -37,6 +37,7 @@ package gen_pkg is
 
        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";
@@ -123,4 +124,26 @@ package body gen_pkg is
                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;