| Line 95... |
Line 95... |
Clock : in std_logic;
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Clock : in std_logic;
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Reset : in std_logic;
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Reset : in std_logic;
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--
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--
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uSec_Tick : in std_logic;
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uSec_Tick : in std_logic;
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--
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--
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Bus_Address : in ADDRESS_TYPE;
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Open8_Bus : in OPEN8_BUS_TYPE;
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Wr_Enable : in std_logic;
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Wr_Data : in DATA_TYPE;
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Rd_Enable : in std_logic;
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Rd_Data : out DATA_TYPE;
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Rd_Data : out DATA_TYPE;
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Interrupt : out std_logic;
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Interrupt : out std_logic;
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--
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--
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LCD_E : out std_logic;
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LCD_E : out std_logic;
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LCD_RW : out std_logic;
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LCD_RW : out std_logic;
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| Line 115... |
Line 112... |
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architecture behave of o8_hd44780_4b is
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architecture behave of o8_hd44780_4b is
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constant User_Addr : std_logic_vector(15 downto 2)
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constant User_Addr : std_logic_vector(15 downto 2)
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:= Address(15 downto 2);
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:= Address(15 downto 2);
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alias Comp_Addr is Bus_Address(15 downto 2);
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alias Comp_Addr is Open8_Bus.Address(15 downto 2);
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signal Addr_Match : std_logic := '0';
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signal Addr_Match : std_logic := '0';
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alias Reg_Addr is Bus_Address(1 downto 0);
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alias Reg_Addr is Open8_Bus.Address(1 downto 0);
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signal Reg_Addr_q : std_logic_vector(1 downto 0) := (others => '0');
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signal Reg_Addr_q : std_logic_vector(1 downto 0) := (others => '0');
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signal Wr_En : std_logic := '0';
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signal Wr_En : std_logic := '0';
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signal Wr_Data_q : DATA_TYPE := x"00";
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signal Wr_Data_q : DATA_TYPE := x"00";
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signal Rd_En : std_logic := '0';
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signal Rd_En : std_logic := '0';
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| Line 212... |
Line 209... |
LCD_Contrast <= Default_Contrast;
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LCD_Contrast <= Default_Contrast;
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LCD_Bright <= Default_Brightness;
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LCD_Bright <= Default_Brightness;
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elsif( rising_edge( Clock ) )then
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elsif( rising_edge( Clock ) )then
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Reg_Addr_q <= Reg_Addr;
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Reg_Addr_q <= Reg_Addr;
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Wr_Data_q <= Wr_Data;
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Wr_Data_q <= Open8_Bus.Wr_Data;
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Wr_En <= Addr_Match and Wr_Enable;
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Wr_En <= Addr_Match and Open8_Bus.Wr_En;
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Reg_Valid <= '0';
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Reg_Valid <= '0';
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if( Wr_En = '1' )then
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if( Wr_En = '1' )then
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case( Reg_Addr_q )is
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case( Reg_Addr_q )is
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| Line 232... |
Line 229... |
when others => null;
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when others => null;
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end case;
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end case;
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end if;
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end if;
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Rd_Data <= OPEN8_NULLBUS;
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Rd_Data <= OPEN8_NULLBUS;
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Rd_En <= Addr_Match and Rd_Enable;
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Rd_En <= Addr_Match and Open8_Bus.Rd_En;
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if( Rd_En = '1' )then
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if( Rd_En = '1' )then
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case( Reg_Addr_q )is
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case( Reg_Addr_q )is
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when "00" | "01" =>
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when "00" | "01" =>
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Rd_Data(7) <= Tx_Ready;
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Rd_Data(7) <= Tx_Ready;
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when "10" =>
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when "10" =>
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