X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=src%2Ftextmode_vga%2Ftextmode_vga_pkg.vhd;fp=src%2Ftextmode_vga%2Ftextmode_vga_pkg.vhd;h=7646bad0fd74e9d55a0b40949b1d3928fd9a0efa;hb=c277013ff527af6b7951add2934084bb5e4e3a25;hp=0000000000000000000000000000000000000000;hpb=38ff39be4ca9a16fe08b3652ce616d150b3e139c;p=hwmod.git

diff --git a/src/textmode_vga/textmode_vga_pkg.vhd b/src/textmode_vga/textmode_vga_pkg.vhd
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+-------------------------------------------------------------------------
+--
+-- Filename: textmode_vga_pkg.vhd
+-- =========
+--
+-- Short Description:
+-- ==================
+--   Global declaration needed by the VGA interface.
+--   This package contains the declaration of the VGA timing values,
+--   the VGA dimensions and the supported commands.
+--
+-------------------------------------------------------------------------
+
+library ieee;
+use ieee.std_logic_1164.all;
+use work.textmode_vga_platform_dependent_pkg.all;
+--
+-- 640x480x60Hz
+--
+--     >=144           <784
+--   >=33 ---------------
+--        |             |
+--        |             |
+--        |             |
+--   <513 ---------------
+--
+-- PixelClock: 25,175 MHz
+--
+-- HSync   96
+-- BackP   48
+-- Data   640
+-- FrontP  16
+--        ---
+--        800
+--
+-- Vsync    2
+-- BackP   31
+-- Data   480
+-- FrontP  11
+--        ---
+--        524
+--
+
+package textmode_vga_pkg is
+  constant COLOR_SIZE : integer := 8;
+  constant CHAR_SIZE : integer := 8;
+
+  constant COLOR_BLACK : std_logic_vector(3 * COLOR_SIZE - 1 downto 0) := (others => '0');
+  constant COLOR_WHITE : std_logic_vector(3 * COLOR_SIZE - 1 downto 0) := (others => '1');
+
+  constant PIXEL_WIDTH : integer := 640;
+  constant PIXEL_HEIGHT : integer := 480;
+  constant HSYNC_CYCLES : integer := 96;
+  constant HBACK_CYCLES : integer := 48;
+  constant HFRONT_CYCLES : integer := 16;
+  constant VSYNC_LINES : integer := 2;
+  constant VBACK_LINES : integer := 31;
+  constant VFRONT_LINES : integer := 11;
+
+  subtype COLOR_RANGE is natural range COLOR_SIZE + CHAR_SIZE - 1 downto CHAR_SIZE;
+  subtype VGA_MEMORY_RANGE is natural range COLOR_SIZE + CHAR_SIZE - 1 downto 0;
+  
+  constant COMMAND_SIZE : integer := 8;
+  constant COMMAND_NOP : std_logic_vector(COMMAND_SIZE - 1 downto 0) := x"00";
+  constant COMMAND_SET_CHAR : std_logic_vector(COMMAND_SIZE - 1 downto 0) := x"01";
+  constant COMMAND_SET_BACKGROUND : std_logic_vector(COMMAND_SIZE - 1 downto 0) := x"02";
+  constant COMMAND_SET_CURSOR_STATE : std_logic_vector(COMMAND_SIZE - 1 downto 0) := x"03";
+  constant COMMAND_SET_CURSOR_COLOR : std_logic_vector(COMMAND_SIZE - 1 downto 0) := x"04";
+  constant COMMAND_SET_CURSOR_COLUMN : std_logic_vector(COMMAND_SIZE - 1 downto 0) := x"05";
+  constant COMMAND_SET_CURSOR_LINE : std_logic_vector(COMMAND_SIZE - 1 downto 0) := x"06";
+  
+  constant CHAR_NEW_LINE : std_logic_vector(CHAR_SIZE - 1 downto 0) := x"0A";
+  constant CHAR_CARRIAGE_RETURN : std_logic_vector(CHAR_SIZE - 1 downto 0) := x"0D";
+  constant CHAR_NULL : std_logic_vector(CHAR_SIZE - 1 downto 0) := x"00";
+  
+  type CURSOR_STATE_TYPE is (CURSOR_OFF, CURSOR_ON, CURSOR_BLINK);
+  constant CURSOR_BLINK_INTERVAL_MS : integer := 500;
+end package textmode_vga_pkg;