|
|
------------------------------------------------------------------------------
|
|
|
-- This file is a part of the LPP VHDL IP LIBRARY
|
|
|
-- Copyright (C) 2009 - 2010, Laboratory of Plasmas Physic - CNRS
|
|
|
--
|
|
|
-- This program is free software; you can redistribute it and/or modify
|
|
|
-- it under the terms of the GNU General Public License as published by
|
|
|
-- the Free Software Foundation; either version 3 of the License, or
|
|
|
-- (at your option) any later version.
|
|
|
--
|
|
|
-- This program is distributed in the hope that it will be useful,
|
|
|
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
-- GNU General Public License for more details.
|
|
|
--
|
|
|
-- You should have received a copy of the GNU General Public License
|
|
|
-- along with this program; if not, write to the Free Software
|
|
|
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
-------------------------------------------------------------------------------
|
|
|
-- Author : Alexis Jeandet
|
|
|
-- Mail : alexis.jeandet@lpp.polytechnique.fr
|
|
|
-------------------------------------------------------------------------------
|
|
|
library IEEE;
|
|
|
use IEEE.STD_LOGIC_1164.ALL;
|
|
|
use IEEE.NUMERIC_STD.ALL;
|
|
|
|
|
|
library lpp;
|
|
|
use lpp.amba_lcd_16x2_ctrlr.all;
|
|
|
use lpp.LCD_16x2_CFG.all;
|
|
|
|
|
|
|
|
|
entity LCD_16x2_ENGINE is
|
|
|
generic(OSC_freqKHz : integer := 50000);
|
|
|
Port ( clk : in STD_LOGIC;
|
|
|
reset : in STD_LOGIC;
|
|
|
DATA : in FRM_Buff_Space;
|
|
|
CMD : in std_logic_vector(10 downto 0);
|
|
|
Exec : in std_logic;
|
|
|
Ready : out std_logic;
|
|
|
LCD_CTRL : out LCD_DRVR_CTRL_BUSS
|
|
|
);
|
|
|
end LCD_16x2_ENGINE;
|
|
|
|
|
|
architecture ar_LCD_16x2_ENGINE of LCD_16x2_ENGINE is
|
|
|
|
|
|
constant ConfigTbl : LCD_CFG_Tbl :=(ClearDSPLY,FunctionSet,DSPL_CTRL,SetEntryMode,RetHome);
|
|
|
|
|
|
|
|
|
|
|
|
signal SYNCH : LCD_DRVR_SYNCH_BUSS;
|
|
|
signal DRIVER_CMD : LCD_DRVR_CMD_BUSS;
|
|
|
signal FRAME_CLK : std_logic;
|
|
|
|
|
|
signal FRAME_CLK_reg : std_logic;
|
|
|
signal RefreshFlag : std_logic;
|
|
|
signal CMD_Flag : std_logic;
|
|
|
signal Exec_Reg : std_logic;
|
|
|
|
|
|
type state_t is (INIT0,INIT1,INIT2,IDLE,Refresh,Refresh0,Refresh1,ReturnHome,GoLine2,GoLine2_0,ExecCMD0,ExecCMD1);
|
|
|
signal state : state_t;
|
|
|
signal i : integer range 0 to lcd_space_size := 0;
|
|
|
|
|
|
|
|
|
|
|
|
begin
|
|
|
|
|
|
Driver0 : LCD_16x2_DRIVER
|
|
|
generic map(OSC_freqKHz)
|
|
|
Port map(reset,clk,LCD_CTRL,SYNCH,DRIVER_CMD);
|
|
|
|
|
|
FRAME_CLK_GEN0 : FRAME_CLK_GEN
|
|
|
generic map(OSC_freqKHz)
|
|
|
Port map( clk,reset,FRAME_CLK);
|
|
|
|
|
|
|
|
|
|
|
|
process(reset,clk)
|
|
|
begin
|
|
|
if reset = '0' then
|
|
|
state <= INIT0;
|
|
|
Ready <= '0';
|
|
|
RefreshFlag <= '0';
|
|
|
i <= 0;
|
|
|
elsif clk'event and clk ='1' then
|
|
|
FRAME_CLK_reg <= FRAME_CLK;
|
|
|
Exec_Reg <= Exec;
|
|
|
|
|
|
if FRAME_CLK_reg = '0' and FRAME_CLK = '1' then
|
|
|
RefreshFlag <= '1';
|
|
|
elsif state = Refresh or state = Refresh0 or state = Refresh1 then
|
|
|
RefreshFlag <= '0';
|
|
|
end if;
|
|
|
|
|
|
if Exec_Reg = '0' and Exec = '1' then
|
|
|
CMD_Flag <= '1';
|
|
|
elsif state = ExecCMD0 or state = ExecCMD1 then
|
|
|
CMD_Flag <= '0';
|
|
|
end if;
|
|
|
|
|
|
case state is
|
|
|
when INIT0 =>
|
|
|
if SYNCH.DRVR_READY = '1' then
|
|
|
DRIVER_CMD.Exec <= '1';
|
|
|
DRIVER_CMD.Duration <= Duration_20ms;
|
|
|
DRIVER_CMD.CMD_Data <= '0';
|
|
|
DRIVER_CMD.Word <= ConfigTbl(i);
|
|
|
i <= i + 1;
|
|
|
state <= INIT1;
|
|
|
else
|
|
|
DRIVER_CMD.Exec <= '0';
|
|
|
end if;
|
|
|
when INIT1 =>
|
|
|
state <= INIT2;
|
|
|
DRIVER_CMD.Exec <= '0';
|
|
|
when INIT2 =>
|
|
|
if SYNCH.DRVR_READY = '1' then
|
|
|
if i = 5 then
|
|
|
state <= Idle;
|
|
|
else
|
|
|
state <= INIT0;
|
|
|
end if;
|
|
|
end if;
|
|
|
when Idle=>
|
|
|
DRIVER_CMD.Exec <= '0';
|
|
|
if RefreshFlag = '1' then
|
|
|
Ready <= '0';
|
|
|
state <= Refresh;
|
|
|
elsif CMD_Flag = '1' then
|
|
|
Ready <= '0';
|
|
|
state <= ExecCMD0;
|
|
|
else
|
|
|
Ready <= '1';
|
|
|
end if;
|
|
|
i <= 0;
|
|
|
when Refresh=>
|
|
|
if SYNCH.DRVR_READY = '1' then
|
|
|
DRIVER_CMD.Exec <= '1';
|
|
|
DRIVER_CMD.Duration <= Duration_100us;
|
|
|
DRIVER_CMD.CMD_Data <= '1';
|
|
|
DRIVER_CMD.Word <= DATA(i);
|
|
|
state <= Refresh0;
|
|
|
else
|
|
|
DRIVER_CMD.Exec <= '0';
|
|
|
end if;
|
|
|
when Refresh0=>
|
|
|
i <= i + 1;
|
|
|
state <= Refresh1;
|
|
|
DRIVER_CMD.Exec <= '0';
|
|
|
when Refresh1=>
|
|
|
if SYNCH.DRVR_READY = '1' then
|
|
|
if i = lcd_space_size then
|
|
|
-- state <= ReturnHome;
|
|
|
state <= Idle;
|
|
|
-- elsif i = 16 then
|
|
|
-- state <= GoLine2;
|
|
|
else
|
|
|
state <= Refresh;
|
|
|
end if;
|
|
|
end if;
|
|
|
|
|
|
when ExecCMD0=>
|
|
|
if SYNCH.DRVR_READY = '1' then
|
|
|
DRIVER_CMD.Exec <= '1';
|
|
|
DRIVER_CMD.Duration <= CMD(9 downto 8);
|
|
|
DRIVER_CMD.CMD_Data <= '0';
|
|
|
DRIVER_CMD.Word <= CMD(7 downto 0);
|
|
|
state <= ExecCMD1;
|
|
|
else
|
|
|
DRIVER_CMD.Exec <= '0';
|
|
|
end if;
|
|
|
|
|
|
when ExecCMD1=>
|
|
|
state <= Idle;
|
|
|
DRIVER_CMD.Exec <= '0';
|
|
|
|
|
|
when GoLine2=>
|
|
|
if SYNCH.DRVR_READY = '1' then
|
|
|
DRIVER_CMD.Exec <= '1';
|
|
|
DRIVER_CMD.Duration <= Duration_4ms;
|
|
|
DRIVER_CMD.CMD_Data <= '0';
|
|
|
DRIVER_CMD.Word <= X"C0";
|
|
|
state <= GoLine2_0;
|
|
|
else
|
|
|
DRIVER_CMD.Exec <= '0';
|
|
|
end if;
|
|
|
when GoLine2_0=>
|
|
|
state <= Refresh;
|
|
|
DRIVER_CMD.Exec <= '0';
|
|
|
when ReturnHome=>
|
|
|
if SYNCH.DRVR_READY = '1' then
|
|
|
DRIVER_CMD.Exec <= '1';
|
|
|
DRIVER_CMD.Duration <= Duration_4ms;
|
|
|
DRIVER_CMD.CMD_Data <= '0';
|
|
|
DRIVER_CMD.Word <= RetHome;
|
|
|
state <= Idle;
|
|
|
else
|
|
|
DRIVER_CMD.Exec <= '0';
|
|
|
end if;
|
|
|
end case;
|
|
|
end if;
|
|
|
end process;
|
|
|
|
|
|
|
|
|
end ar_LCD_16x2_ENGINE;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
