X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=src%2Fgen_pkg.vhd;h=f8a2963d90405aea55fe3bd4271915482288685a;hb=a1b9896ecd59e16ef6c28bc6990eadd6e0c515c8;hp=f2f48712d7bac1efb3b2603c91cadabd5e3d071f;hpb=f6b73bf4a050a6186bac25abf1cd173cd00c7e4f;p=hwmod.git

diff --git a/src/gen_pkg.vhd b/src/gen_pkg.vhd
index f2f4871..f8a2963 100644
--- a/src/gen_pkg.vhd
+++ b/src/gen_pkg.vhd
@@ -1,4 +1,149 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+use work.math_pkg.all;
+
 package gen_pkg is
-	type alu_ops is (NOP, SUB, ADD, MUL, DIV, DONE);
+	subtype alu_ops is std_logic_vector(2 downto 0);
+	constant ALU_NOP : alu_ops := "000";
+	constant ALU_SUB : alu_ops := "001";
+	constant ALU_ADD : alu_ops := "010";
+	constant ALU_MUL : alu_ops := "011";
+	constant ALU_DIV : alu_ops := "100";
+	constant ALU_DONE : alu_ops := "101";
+
+	constant CBITS : integer := 32;
+	subtype csigned is signed((CBITS-1) downto 0);
+	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
+	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;
+
+	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;