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发表于 2011-1-30 21:24:01
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事到如今搞不知道sram既要写入数据，又要读出数据到屏上连续显示。
论坛上发的其他的TFT的控制器的代码无从下手看起。看了几个，看不懂。
T6963C控制器图形液晶模块VHDL控制代码-T6963C Graphic LCD module controller VHDL control code
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library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
entity LCD is
generic(divide_to_100k:integer:=500);
Port ( clk,rst : in STD_LOGIC;
s0_a,s1_a,s2_a,s3_a,s4_a,s5_a,s6_a: out std_logic;
c1,c2: out STD_LOGIC;
wr : out STD_LOGIC;
rd : out STD_LOGIC;
cd : out STD_LOGIC;
lcd_rst : out STD_LOGIC;
lcd_data : out STD_LOGIC_VECTOR (7 downto 0));
end LCD;
architecture Behavioral of LCD is
signal clk_100k:std_logic;
type state is (s0,s1,s2,s3,s4,s5,s6,s7,s8,s9,s10,s11,s12,s13,s14,s15);
signal current_s:state;
--type state_s is (s0_0,s1_1,s2_2);
--signal current_s_s:state_s;
type instruction_code is array(0 to 12)of std_logic_vector(7 downto 0);
constant c_code:instruction_code:=(x"00",x"00",x"40",x"1e",x"00",x"41",x"80",x"94",x"07",x"00",x"24",x"b0",x"b2");
--c_t_starting_add --c_t_width --c_t_on --c_add_p c_auto_w_off
--c_or_mode c_auto_w_on
type data_buffer is array(0 to 14)of std_logic_vector(7 downto 0);
constant data_buf:data_buffer:=(x"57",x"57",x"57",x"0E", x"13",x"11",x"15",x"59",
x"44",x"44",x"5A",x"0E", x"43",x"4F",x"4D");
begin
c1<='1';
c2<='1';
process(clk)
variable cnt:integer range 0 to divide_to_100k;
begin
if rising_edge(clk) then
cnt:=cnt+1;
if cnt=divide_to_100k then
cnt:=0;
end if;
if cnt<divide_to_100k/2 then
clk_100k<='0';
else
clk_100k<='1';
end if;
end if;
end process;
process(clk_100k)-------------clk_100k
variable cnt1:integer range 0 to 500000; --cnt1 for loop
variable cnt1_1:integer range 0 to 1000; --cnt1_1 for writing operation
variable code_cnt:integer range 0 to 13; --cnt1_2 array of code
variable data_cnt:integer range 0 to 480;
begin
if rising_edge(clk_100k) then
if rst='1' then
current_s<=s0;
cnt1:=0;
cnt1_1:=0;
code_cnt:=0;
data_cnt:=0;
lcd_rst<='0';
s0_a<='0';
s1_a<='0';
s2_a<='0';
s3_a<='0';
s4_a<='0';
s5_a<='0';
s6_a<='0';
else
case current_s is
when s0=>
wr<='1';
rd<='1';
cnt1:=cnt1+1;
if cnt1<250000 then
lcd_rst<='0';
elsif cnt1<500000 then--500
lcd_rst<='1';
elsif cnt1=500000 then--500 --delay for lcd_initial
lcd_rst<='1';
cnt1:=0;
current_s<=s1;
end if;
s0_a<='0';
s1_a<='1';
s2_a<='1';
s3_a<='1';
s4_a<='1';
s5_a<='1';
s6_a<='1';
when s1=>
if cnt1<2 then --control amount of c_code
if cnt1_1<1*3 then
cd<='0';
elsif cnt1_1<2*3 then
lcd_data<=c_code(code_cnt);
if cnt1_1=(2*3-1) then
code_cnt:=code_cnt+1;
end if;
elsif cnt1_1<3*3 then
wr<='0';
elsif cnt1_1<4*3 then
wr<='1';
-----------------------------writing a parameter
elsif cnt1_1<5*3 then
cd<='0';
elsif cnt1_1<6*3 then
lcd_data<=c_code(code_cnt);
if cnt1_1=6*3-1 then
code_cnt:=code_cnt+1;
end if;
elsif cnt1_1<7*3 then
wr<='0';
elsif cnt1_1<8*3 then
wr<='1';
-----------------------------writing a parameter
elsif cnt1_1<9*3 then
cd<='1';
elsif cnt1_1<10*3 then
lcd_data<=c_code(code_cnt);
if cnt1_1=10*3-1 then
code_cnt:=code_cnt+1;
end if;
elsif cnt1_1<11*3 then
wr<='0';
elsif cnt1_1<12*3 then
wr<='1';
end if;
end if;
-----------------------------writing a code
cnt1_1:=cnt1_1+1;
if cnt1_1=100 then
cnt1_1:=0;
cnt1:=cnt1+1;
if cnt1=2 then
current_s<=s2;
cnt1:=0;
end if;
end if;
s0_a<='1';
s1_a<='0';
s2_a<='1';
s3_a<='1';
s4_a<='1';
s5_a<='1';
s6_a<='1';
when s2=>
if cnt1<2 then --control amount of c_code
if cnt1_1<1*3 then
cd<='1';
elsif cnt1_1<2*3 then
lcd_data<=c_code(code_cnt);
if cnt1_1=2*3-1 then
code_cnt:=code_cnt+1;
end if;
elsif cnt1_1<3*3 then
wr<='0';
elsif cnt1_1<4*3 then
wr<='1';
end if;
end if;
-----------------------------writing a code
cnt1_1:=cnt1_1+1;
if cnt1_1=100 then
cnt1_1:=0;
cnt1:=cnt1+1;
if cnt1=2 then
current_s<=s3;
cnt1:=0;
end if;
end if;
s0_a<='1';
s1_a<='1';
s2_a<='0';
s3_a<='1';
s4_a<='1';
s5_a<='1';
s6_a<='1';
when s3=>-------------------------set add_p and auto_write
if cnt1_1<1*3 then
cd<='0';
elsif cnt1_1<2*3 then
lcd_data<=c_code(8);
elsif cnt1_1<3*3 then
wr<='0';
elsif cnt1_1<4*3 then
wr<='1';
-----------------------------writing a parameter
elsif cnt1_1<5*3 then
cd<='0';
elsif cnt1_1<6*3 then
lcd_data<=c_code(9);
elsif cnt1_1<7*3 then
wr<='0';
elsif cnt1_1<8*3 then
wr<='1';
-----------------------------writing a parameter
elsif cnt1_1<9*3 then
cd<='1';
elsif cnt1_1<10*3 then
lcd_data<=c_code(10);
elsif cnt1_1<11*3 then
wr<='0';
elsif cnt1_1<12*3 then
wr<='1';
end if;
-----------------------------writing a code
cnt1_1:=cnt1_1+1;
if cnt1_1=100 then
cnt1_1:=0;
current_s<=s4;
end if;
s0_a<='1';
s1_a<='1';
s2_a<='1';
s3_a<='0';
s4_a<='1';
s5_a<='1';
s6_a<='1';
when s4=>
if cnt1_1<1*3 then
cd<='1';
elsif cnt1_1<2*3 then
lcd_data<=c_code(11);
elsif cnt1_1<5*3 then
wr<='0';
elsif cnt1_1<6*3 then
wr<='1';
end if;
-----------------------------writing a code
cnt1_1:=cnt1_1+1;
if cnt1_1=100 then
cnt1_1:=0;
current_s<=s5;
data_cnt:=0;
end if;
s0_a<='1';
s1_a<='1';
s2_a<='1';
s3_a<='1';
s4_a<='0';
s5_a<='1';
s6_a<='1';
when s5=>
if cnt1_1<1*3 then
cd<='0';
elsif cnt1_1<2*3 then
lcd_data<=x"37";
data_cnt:=data_cnt+1;
elsif cnt1_1<3*3 then
wr<='0';
elsif cnt1_1<4*3 then
wr<='1';
end if;
-----------------------------writing a data
cnt1_1:=cnt1_1+1;
if cnt1_1=100 then
cnt1_1:=0;
if data_cnt=480 then
current_s<=s6;
data_cnt:=0;
end if;
end if;
s0_a<='1';
s1_a<='1';
s2_a<='1';
s3_a<='1';
s4_a<='1';
s5_a<='0';
s6_a<='1';
when s6=>
if cnt1_1<1*3 then
cd<='1';
elsif cnt1_1<2*3 then
lcd_data<=c_code(12);
elsif cnt1_1<3*3 then
wr<='0';
elsif cnt1_1<4*3 then
wr<='1';
end if;
-----------------------------writing a code
cnt1_1:=cnt1_1+1;
if cnt1_1=100 then
cnt1_1:=0;----------------------------------------------------------
current_s<=s7;--------------------------------------------------------
end if;
s0_a<='1';
s1_a<='1';
s2_a<='1';
s3_a<='1';
s4_a<='1';
s5_a<='1';
s6_a<='0';
when s7=>-------------------------set add_p and auto_write
if cnt1_1=0 then
cd<='0';
elsif cnt1_1=1 then
lcd_data<=x"00";
elsif cnt1_1=2 then
wr<='0';
elsif cnt1_1=3 then
wr<='1';
-----------------------------writing a parameter
elsif cnt1_1=4 then
cd<='0';
elsif cnt1_1=5 then
lcd_data<=x"00";
elsif cnt1_1=6 then
wr<='0';
elsif cnt1_1=7 then
wr<='1';
-----------------------------writing a parameter
elsif cnt1_1=8 then
cd<='1';
elsif cnt1_1=9 then
lcd_data<=c_code(10);
elsif cnt1_1=10 then
wr<='0';
elsif cnt1_1=11 then
wr<='1';
end if;
-----------------------------writing a code
cnt1_1:=cnt1_1+1;
if cnt1_1=100 then
cnt1_1:=0;
current_s<=s8;
end if;
s0_a<='1';
s1_a<='1';
s2_a<='1';
s3_a<='0';
s4_a<='1';
s5_a<='1';
s6_a<='1';
when s8=>
if cnt1_1=0 then
cd<='1';
elsif cnt1_1=1 then
lcd_data<=c_code(11);
elsif cnt1_1=2 then
wr<='0';
elsif cnt1_1=3 then
wr<='1';
end if;
-----------------------------writing a code
cnt1_1:=cnt1_1+1;
if cnt1_1=100 then
cnt1_1:=0;
current_s<=s9;
data_cnt:=0;
end if;
s0_a<='1';
s1_a<='1';
s2_a<='1';
s3_a<='1';
s4_a<='0';
s5_a<='1';
s6_a<='1';
when s9=>
if cnt1_1=0 then
cd<='0';
elsif cnt1_1=1 then
lcd_data<=x"00";
data_cnt:=data_cnt+1;
elsif cnt1_1=2 then
wr<='0';
elsif cnt1_1=3 then
wr<='1';
end if;
-----------------------------writing a data
cnt1_1:=cnt1_1+1;
if cnt1_1=100 then
cnt1_1:=0;
if data_cnt=480 then
current_s<=s10;
data_cnt:=0;
end if;
end if;
s0_a<='1';
s1_a<='1';
s2_a<='1';
s3_a<='1';
s4_a<='1';
s5_a<='0';
s6_a<='1';
when s10=>
if cnt1_1=0 then
cd<='1';
elsif cnt1_1=1 then
lcd_data<=c_code(12);
elsif cnt1_1=2 then
wr<='0';
elsif cnt1_1=3 then
wr<='1';
end if;
-----------------------------writing a code
cnt1_1:=cnt1_1+1;
if cnt1_1=100 then
cnt1_1:=0;----------------------------------------------------------
current_s<=s11;--------------------------------------------------------
end if;
s0_a<='1';
s1_a<='1';
s2_a<='1';
s3_a<='1';
s4_a<='1';
s5_a<='1';
s6_a<='0';
when s11=>-------------------------set add_p and auto_write
if cnt1_1=0 then
cd<='0';
elsif cnt1_1=1 then
lcd_data<=c_code(8);
elsif cnt1_1=2 then
wr<='0';
elsif cnt1_1=3 then
wr<='1';
-----------------------------writing a parameter
elsif cnt1_1=4 then
cd<='0';
elsif cnt1_1=5 then
lcd_data<=c_code(9);
elsif cnt1_1=6 then
wr<='0';
elsif cnt1_1=7 then
wr<='1';
-----------------------------writing a parameter
elsif cnt1_1=8 then
cd<='1';
elsif cnt1_1=9 then
lcd_data<=c_code(10);
elsif cnt1_1=10 then
wr<='0';
elsif cnt1_1=11 then
wr<='1';
end if;
-----------------------------writing a code
cnt1_1:=cnt1_1+1;
if cnt1_1=100 then
cnt1_1:=0;
current_s<=s12;
end if;
s0_a<='1';
s1_a<='1';
s2_a<='1';
s3_a<='0';
s4_a<='1';
s5_a<='1';
s6_a<='1';
when s12=>
if cnt1_1=0 then
cd<='1';
elsif cnt1_1=1 then
lcd_data<=c_code(11);
elsif cnt1_1=2 then
wr<='0';
elsif cnt1_1=3 then
wr<='1';
end if;
-----------------------------writing a code
cnt1_1:=cnt1_1+1;
if cnt1_1=100 then
cnt1_1:=0;
current_s<=s13;
data_cnt:=0;
end if;
s0_a<='1';
s1_a<='1';
s2_a<='1';
s3_a<='1';
s4_a<='0';
s5_a<='1';
s6_a<='1';
when s13=>
if cnt1_1=0 then
cd<='0';
elsif cnt1_1=1 then
lcd_data<=data_buf(data_cnt);
data_cnt:=data_cnt+1;
elsif cnt1_1=2 then
wr<='0';
elsif cnt1_1=3 then
wr<='1';
end if;
-----------------------------writing a data
cnt1_1:=cnt1_1+1;
if cnt1_1=100 then
cnt1_1:=0;
if data_cnt=15 then
current_s<=s14;
data_cnt:=0;
end if;
end if;
s0_a<='1';
s1_a<='1';
s2_a<='1';
s3_a<='1';
s4_a<='1';
s5_a<='0';
s6_a<='1';
when s14=>
if cnt1_1=0 then
cd<='1';
elsif cnt1_1=1 then
lcd_data<=c_code(12);
elsif cnt1_1=2 then
wr<='0';
elsif cnt1_1=3 then
wr<='1';
end if;
-----------------------------writing a code
cnt1_1:=cnt1_1+1;
if cnt1_1=100 then
cnt1_1:=0;----------------------------------------------------------
current_s<=s15;--------------------------------------------------------
end if;
s0_a<='1';
s1_a<='1';
s2_a<='1';
s3_a<='1';
s4_a<='1';
s5_a<='1';
s6_a<='0';
when s15=>
null;
when others=>
current_s<=s0;
end case;
end if;
end if;
end process;
end Behavioral; |
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发表于 2011-1-20 15:35:24
发表于 2011-4-5 02:09:07
