library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
+use work.math_pkg.all;
package gen_pkg is
subtype alu_ops is std_logic_vector(2 downto 0);
constant CBITS : integer := 32;
subtype csigned is signed((CBITS-1) downto 0);
- --TODO: bei CBITS-1 gibts einen overflow :/
- subtype cinteger is integer range -(2**(CBITS-2)) to ((2**(CBITS-2))-1);
- function find_msb(a : csigned) return natural;
- procedure icwait(signal clk_i : IN std_logic; cycles: Natural);
+ subtype divinteger is unsigned(4 downto 0);
+ -- integer ist 32bit (31bit + sign)
+ subtype cinteger is integer;
+
+
+ constant HSPALTE_MAX : integer := 71;
+ subtype hspalte is std_logic_vector(6 downto 0);
+
+ constant HZEILE_MAX : integer := 100;
+ subtype hzeile is std_logic_vector(6 downto 0);
+
+ -- 50 zeilen * 71 zeichen * 2 (berechnung + ergebnis) = 7100 bytes
+ constant H_RAM_SIZE : integer := HZEILE_MAX * HSPALTE_MAX;
+ constant H_RAM_WIDTH : integer := log2c(H_RAM_SIZE);
+
+ subtype hbyte is std_logic_vector(7 downto 0);
+ subtype hstring is string(1 to HSPALTE_MAX+1);
+ subtype hstr_int is integer range 0 to HSPALTE_MAX+1;
+
+ procedure icwait(signal clk_i : IN std_logic; cycles: natural);
+
+ 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";
+ constant SC_KP_1 : hbyte := x"69";
+ constant SC_KP_2 : hbyte := x"72";
+ constant SC_KP_3 : hbyte := x"7a";
+ constant SC_KP_4 : hbyte := x"6b";
+ constant SC_KP_5 : hbyte := x"73";
+ constant SC_KP_6 : hbyte := x"74";
+ constant SC_KP_7 : hbyte := x"6c";
+ constant SC_KP_8 : hbyte := x"75";
+ constant SC_KP_9 : hbyte := x"7d";
+
+ constant SC_0 : hbyte := x"45";
+ constant SC_1 : hbyte := x"16";
+ constant SC_2 : hbyte := x"1e";
+ constant SC_3 : hbyte := x"26";
+ constant SC_4 : hbyte := x"25";
+ constant SC_5 : hbyte := x"2e";
+ constant SC_6 : hbyte := x"36";
+ constant SC_7 : hbyte := x"3d";
+ constant SC_8 : hbyte := x"3e";
+ constant SC_9 : hbyte := x"46";
+
+ constant SC_KP_PLUS : hbyte := x"79";
+ constant SC_KP_MINUS : hbyte := x"7b";
+ constant SC_KP_MUL : hbyte := x"7c";
+ constant SC_KP_DIV : hbyte := x"4a"; -- inkl. 0xe0!
+
+ -- fuer deutsches layout, alle anderen zeichen sind unguenstig belegt
+ constant SC_PLUS : hbyte := x"5b";
+
+ constant SC_ENTER : hbyte := x"5a";
+ constant SC_BKSP : hbyte := x"66";
+ constant SC_SPACE : hbyte := x"29";
end package gen_pkg;
package body gen_pkg is
- function find_msb(a : csigned) return natural is
- variable r : natural := 0;
- begin
- for i in (CBITS-1) downto 0 loop
- exit when a(i) = '1';
- r := r+1;
- end loop;
- return (CBITS - r);
- end function find_msb;
-
procedure icwait(signal clk_i : IN std_logic; cycles: Natural) is
begin
for i in 1 to cycles loop
wait until clk_i= '0' and clk_i'event;
end loop;
end;
-end package body gen_pkg;
+ function ascii2sc (x : hbyte) return hbyte is
+ variable y : hbyte;
+ begin
+ case x is
+ when x"30" => y := SC_KP_0;
+ when x"31" => y := SC_KP_1;
+ when x"32" => y := SC_KP_2;
+ when x"33" => y := SC_KP_3;
+ when x"34" => y := SC_KP_4;
+ when x"35" => y := SC_KP_5;
+ when x"36" => y := SC_KP_6;
+ when x"37" => y := SC_KP_7;
+ when x"38" => y := SC_KP_8;
+ when x"39" => y := SC_KP_9;
+ when x"2b" => y := SC_KP_PLUS;
+ when x"2d" => y := SC_KP_MINUS;
+ when x"2a" => y := SC_KP_MUL;
+ when x"2f" => y := SC_KP_DIV;
+ when x"20" => y := SC_SPACE;
+ when x"1c" => y := SC_ENTER;
+ when x"0e" => y := SC_BKSP;
+ when others => y := x"41";
+ end case;
+ return y;
+ end function;
+
+ function valid_char (x : hbyte) return boolean is
+ variable y : boolean;
+ begin
+ case x is
+ when SC_KP_0 | SC_KP_1 | SC_KP_2 | SC_KP_3 |
+ SC_KP_4 | SC_KP_5 | SC_KP_6 | SC_KP_7 |
+ SC_KP_8 | SC_KP_9 | SC_KP_PLUS |
+ SC_KP_MINUS | SC_KP_MUL |
+ SC_KP_DIV | SC_SPACE |
+ SC_BKSP | SC_ENTER =>
+ y := true;
+ when others => y := false;
+ 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;
projects / hwmod.git / blobdiff