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Subversion Repositories wb_lcd

[/] [wb_lcd/] [trunk/] [myhdl/] [wb_lcd_workspace_ramless/] [workspace/] [lcd_display/] [src/] [wb_lcd.vhd] - Blame information for rev 2

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-- File: wb_lcd.vhd
-- Generated by MyHDL 0.6
-- Date: Mon Apr 20 03:13:35 2009
 
 
package pck_wb_lcd is
 
    type t_enum_t_TxState_2 is (
    tx_high_setup,
    tx_high_hold,
    tx_oneus,
    tx_low_setup,
    tx_low_hold,
    tx_fortyus,
    tx_done
);
    type t_enum_t_State_1 is (
    display_init,
    init_fifteenms,
    init_one,
    init_two,
    init_three,
    init_four,
    init_five,
    init_six,
    init_seven,
    init_eight,
    display_function_set,
    display_entry_set,
    display_set_display,
    display_clr_display,
    display_pause_setup,
    display_pause,
    display_done,
    display_set_addr,
    display_char_write
);
 
end package pck_wb_lcd;
 
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use std.textio.all;
 
use work.pck_myhdl_06.all;
 
use work.pck_wb_lcd.all;
 
entity wb_lcd is
    port (
        wb_clk_i: in std_logic;
        wb_rst_i: in std_logic;
        wb_dat_i: in unsigned(31 downto 0);
        wb_dat_o: out unsigned(31 downto 0);
        wb_adr_i: in unsigned(31 downto 0);
        wb_sel_i: in unsigned(3 downto 0);
        wb_we_i: in std_logic;
        wb_cyc_i: in std_logic;
        wb_stb_i: in std_logic;
        wb_ack_o: out std_logic;
        SF_D: out unsigned(3 downto 0);
        LCD_E: out std_logic;
        LCD_RS: out std_logic;
        LCD_RW: out std_logic
    );
end entity wb_lcd;
 
architecture MyHDL of wb_lcd is
 
signal busy: std_logic;
signal lcd_we: std_logic;
signal mylcd_tx_init: std_logic;
signal mylcd_delay_load: std_logic;
signal mylcd_tx_done: std_logic;
signal mylcd_SF_D1: unsigned(3 downto 0);
signal mylcd_SF_D0: unsigned(3 downto 0);
signal mylcd_LCD_E1: std_logic;
signal mylcd_LCD_E0: std_logic;
signal mylcd_delay_done: std_logic;
signal mylcd_tx_byte: unsigned(7 downto 0);
signal mylcd_wr_addr: unsigned(6 downto 0);
signal mylcd_output_selector: std_logic;
signal mylcd_state: t_enum_t_State_1;
signal mylcd_tx_delay_value: unsigned(19 downto 0);
signal mylcd_main_delay_value: unsigned(19 downto 0);
signal mylcd_tx_delay_load: std_logic;
signal mylcd_delay_value: unsigned(19 downto 0);
signal mylcd_wr_dat: unsigned(6 downto 0);
signal mylcd_main_delay_load: std_logic;
signal mylcd_tx_state: t_enum_t_TxState_2;
signal mylcd_counter_counter: unsigned(20 downto 0);
 
begin
 
 
WB_LCD_WISHBONE_LOGIC: process (busy, wb_we_i, wb_stb_i, wb_cyc_i, wb_adr_i) is
begin
    wb_ack_o <= (wb_cyc_i and wb_stb_i);
 
    lcd_we <= (wb_cyc_i and wb_stb_i and wb_we_i and to_std_logic(wb_adr_i /= 128));
    if to_boolean(busy) then
        wb_dat_o <= "00000000000000000000000000000001";
    else
        wb_dat_o <= "00000000000000000000000000000000";
    end if;
end process WB_LCD_WISHBONE_LOGIC;
 
 
mylcd_output_selector <= ((mylcd_state = display_init) or (mylcd_state = init_fifteenms) or (mylcd_state = init_one) or (mylcd_state = init_two) or (mylcd_state = init_three) or (mylcd_state = init_four) or (mylcd_state = init_five) or (mylcd_state = init_six) or (mylcd_state = init_seven) or (mylcd_state = init_eight));
 
WB_LCD_MYLCD_CONUNTER_SHARING_VALUE: process (mylcd_main_delay_value, mylcd_tx_delay_load, mylcd_tx_delay_value) is
begin
    if to_boolean(mylcd_tx_delay_load) then
        mylcd_delay_value <= mylcd_tx_delay_value;
    else
        mylcd_delay_value <= mylcd_main_delay_value;
    end if;
end process WB_LCD_MYLCD_CONUNTER_SHARING_VALUE;
 
WB_LCD_MYLCD_DISPLAYFSM: process (wb_clk_i, wb_rst_i) is
begin
    if (wb_rst_i = '1') then
        mylcd_state <= display_init;
        mylcd_main_delay_load <= '0';
        mylcd_main_delay_value <= "00000000000000000000";
        mylcd_SF_D1 <= "0000";
        mylcd_LCD_E1 <= '0';
        mylcd_tx_byte <= "00000000";
    elsif rising_edge(wb_clk_i) then
        mylcd_main_delay_load <= '0';
 
        mylcd_main_delay_value <= "00000000000000000000";
 
        case mylcd_state is
            when display_init =>
                mylcd_tx_byte <= "00000000";
                mylcd_state <= init_fifteenms;
                mylcd_main_delay_load <= '1';
                mylcd_main_delay_value <= "10110111000110110000";
            when init_fifteenms =>
                mylcd_main_delay_load <= '0';
                if to_boolean(mylcd_delay_done) then
                    mylcd_state <= init_one;
 
                    mylcd_main_delay_load <= '1';
                    mylcd_main_delay_value <= "00000000000000001011";
                end if;
            when init_one =>
                mylcd_main_delay_load <= '0';
                mylcd_SF_D1 <= "0011";
                mylcd_LCD_E1 <= '1';
                if to_boolean(mylcd_delay_done) then
                    mylcd_state <= init_two;
 
                    mylcd_main_delay_load <= '1';
                    mylcd_main_delay_value <= "00110010000011001000";
                end if;
            when init_two =>
                mylcd_main_delay_load <= '0';
                mylcd_LCD_E1 <= '0';
                if to_boolean(mylcd_delay_done) then
                    mylcd_state <= init_three;
 
                    mylcd_main_delay_load <= '1';
                    mylcd_main_delay_value <= "00000000000000001011";
                end if;
            when init_three =>
                mylcd_main_delay_load <= '0';
                mylcd_SF_D1 <= "0011";
                mylcd_LCD_E1 <= '1';
                if to_boolean(mylcd_delay_done) then
                    mylcd_state <= init_four;
 
                    mylcd_main_delay_load <= '1';
                    mylcd_main_delay_value <= "00000001001110001000";
                end if;
            when init_four =>
                mylcd_main_delay_load <= '0';
                mylcd_LCD_E1 <= '0';
                if to_boolean(mylcd_delay_done) then
                    mylcd_state <= init_five;
 
                    mylcd_main_delay_load <= '1';
                    mylcd_main_delay_value <= "00000000000000001011";
                end if;
            when init_five =>
                mylcd_main_delay_load <= '0';
                mylcd_SF_D1 <= "0011";
                mylcd_LCD_E1 <= '1';
                if to_boolean(mylcd_delay_done) then
                    mylcd_state <= init_six;
 
                    mylcd_main_delay_load <= '1';
                    mylcd_main_delay_value <= "00000000011111010000";
                end if;
            when init_six =>
                mylcd_main_delay_load <= '0';
                mylcd_LCD_E1 <= '0';
                if to_boolean(mylcd_delay_done) then
                    mylcd_state <= init_seven;
 
                    mylcd_main_delay_load <= '1';
                    mylcd_main_delay_value <= "00000000000000001011";
                end if;
            when init_seven =>
                mylcd_main_delay_load <= '0';
                mylcd_SF_D1 <= "0010";
                mylcd_LCD_E1 <= '1';
                if to_boolean(mylcd_delay_done) then
                    mylcd_state <= init_eight;
 
                    mylcd_main_delay_load <= '1';
                    mylcd_main_delay_value <= "00000000011111010000";
                end if;
            when init_eight =>
                mylcd_main_delay_load <= '0';
                mylcd_LCD_E1 <= '0';
                if to_boolean(mylcd_delay_done) then
                    mylcd_state <= display_function_set;
 
                end if;
            when display_function_set =>
                mylcd_tx_byte <= "00101000";
                if to_boolean(mylcd_tx_done) then
                    mylcd_state <= display_entry_set;
                end if;
            when display_entry_set =>
                mylcd_tx_byte <= "00000110";
                if to_boolean(mylcd_tx_done) then
                    mylcd_state <= display_set_display;
                end if;
            when display_set_display =>
                mylcd_tx_byte <= "00001100";
                if to_boolean(mylcd_tx_done) then
                    mylcd_state <= display_clr_display;
                end if;
            when display_clr_display =>
                mylcd_tx_byte <= "00000001";
                if to_boolean(mylcd_tx_done) then
                    mylcd_state <= display_pause;
                    mylcd_main_delay_load <= '1';
                    mylcd_main_delay_value <= "00010100000001010000";
                end if;
            when display_pause_setup =>
                mylcd_state <= display_pause;
            when display_pause =>
                mylcd_tx_byte <= "00000000";
                if to_boolean(mylcd_delay_done) then
                    mylcd_state <= display_done;
 
                end if;
            when display_done =>
                mylcd_tx_byte <= "00000000";
                if to_boolean(lcd_we) then
                    mylcd_state <= display_set_addr;
                    mylcd_wr_addr <= resize(wb_adr_i, 7);
                    mylcd_wr_dat <= resize(wb_dat_i, 7);
                else
                    mylcd_state <= display_done;
                end if;
            when display_set_addr =>
                mylcd_tx_byte <= ("10000000" or mylcd_wr_addr);
                if to_boolean(mylcd_tx_done) then
                    mylcd_state <= display_char_write;
                end if;
            when display_char_write =>
                mylcd_tx_byte <= resize(mylcd_wr_dat, 8);
                if to_boolean(mylcd_tx_done) then
                    mylcd_state <= display_done;
 
                end if;
        end case;
    end if;
end process WB_LCD_MYLCD_DISPLAYFSM;
 
WB_LCD_MYLCD_TXFSM: process (wb_clk_i, wb_rst_i) is
begin
    if (wb_rst_i = '1') then
        mylcd_tx_state <= tx_done;
        mylcd_SF_D0 <= "0000";
        mylcd_LCD_E0 <= '0';
    elsif rising_edge(wb_clk_i) then
        mylcd_tx_delay_load <= '0';
 
        mylcd_tx_delay_value <= "00000000000000000000";
 
        case mylcd_tx_state is
            when tx_high_setup =>
                mylcd_LCD_E0 <= '0';
                mylcd_SF_D0 <= mylcd_tx_byte(8-1 downto 4);
                mylcd_tx_delay_load <= '0';
                if to_boolean(mylcd_delay_done) then
                    mylcd_tx_state <= tx_high_hold;
                    mylcd_tx_delay_load <= '1';
                    mylcd_tx_delay_value <= "00000000000000001100";
                end if;
            when tx_high_hold =>
                mylcd_LCD_E0 <= '1';
                mylcd_SF_D0 <= mylcd_tx_byte(8-1 downto 4);
                mylcd_tx_delay_load <= '0';
                if to_boolean(mylcd_delay_done) then
                    mylcd_tx_state <= tx_oneus;
                    mylcd_tx_delay_load <= '1';
                    mylcd_tx_delay_value <= "00000000000000110010";
                end if;
            when tx_oneus =>
                mylcd_LCD_E0 <= '0';
                mylcd_tx_delay_load <= '0';
                if to_boolean(mylcd_delay_done) then
                    mylcd_tx_state <= tx_low_setup;
                    mylcd_tx_delay_load <= '1';
                    mylcd_tx_delay_value <= "00000000000000000010";
                end if;
            when tx_low_setup =>
                mylcd_LCD_E0 <= '0';
                mylcd_SF_D0 <= mylcd_tx_byte(4-1 downto 0);
                mylcd_tx_delay_load <= '0';
                if to_boolean(mylcd_delay_done) then
                    mylcd_tx_state <= tx_low_hold;
                    mylcd_tx_delay_load <= '1';
                    mylcd_tx_delay_value <= "00000000000000001100";
                end if;
            when tx_low_hold =>
                mylcd_LCD_E0 <= '1';
                mylcd_SF_D0 <= mylcd_tx_byte(4-1 downto 0);
                mylcd_tx_delay_load <= '0';
                if to_boolean(mylcd_delay_done) then
                    mylcd_tx_state <= tx_fortyus;
                    mylcd_tx_delay_load <= '1';
                    mylcd_tx_delay_value <= "00000000011111010000";
                end if;
            when tx_fortyus =>
                mylcd_LCD_E0 <= '0';
                mylcd_tx_delay_load <= '0';
                if to_boolean(mylcd_delay_done) then
                    mylcd_tx_state <= tx_done;
                    mylcd_tx_done <= '1';
                end if;
            when tx_done =>
                mylcd_LCD_E0 <= '0';
                mylcd_tx_done <= '0';
                mylcd_tx_delay_load <= '0';
                if to_boolean(mylcd_tx_init) then
                    mylcd_tx_state <= tx_high_setup;
                    mylcd_tx_delay_load <= '1';
                    mylcd_tx_delay_value <= "00000000000000000010";
                end if;
        end case;
    end if;
end process WB_LCD_MYLCD_TXFSM;
 
 
mylcd_delay_load <= to_std_logic(to_boolean(mylcd_tx_delay_load) or to_boolean(mylcd_main_delay_load));
 
 
busy <= to_std_logic(mylcd_state /= display_done);
LCD_RW <= '0';
 
WB_LCD_MYLCD_OUTPUT_TX_OR_INIT_MUX: process (mylcd_SF_D1, mylcd_SF_D0, mylcd_LCD_E1, mylcd_LCD_E0, mylcd_output_selector) is
begin
    if to_boolean(mylcd_output_selector) then
        SF_D <= mylcd_SF_D1;
        LCD_E <= mylcd_LCD_E1;
    else
        SF_D <= mylcd_SF_D0;
        LCD_E <= mylcd_LCD_E0;
    end if;
end process WB_LCD_MYLCD_OUTPUT_TX_OR_INIT_MUX;
 
 
mylcd_tx_init <= ((not mylcd_tx_done) and ((mylcd_state = display_function_set) or (mylcd_state = display_entry_set) or (mylcd_state = display_set_display) or (mylcd_state = display_clr_display) or (mylcd_state = display_set_addr) or (mylcd_state = display_char_write)));
LCD_RS <= (not ((mylcd_state = display_function_set) or (mylcd_state = display_entry_set) or (mylcd_state = display_set_display) or (mylcd_state = display_clr_display) or (mylcd_state = display_set_addr)));
 
 
mylcd_delay_done <= to_std_logic(mylcd_counter_counter = 0);
 
WB_LCD_MYLCD_COUNTER_COUNTDOWN_LOGIC: process (wb_clk_i) is
begin
    if rising_edge(wb_clk_i) then
        if to_boolean(mylcd_delay_load) then
            mylcd_counter_counter <= resize(mylcd_delay_value, 21);
        else
            mylcd_counter_counter <= (mylcd_counter_counter - 1);
        end if;
    end if;
end process WB_LCD_MYLCD_COUNTER_COUNTDOWN_LOGIC;
 
end architecture MyHDL;

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Subversion Repositories wb_lcd

[/] [wb_lcd/] [trunk/] [myhdl/] [wb_lcd_workspace_ramless/] [workspace/] [lcd_display/] [src/] [wb_lcd.vhd] - Blame information for rev 2

Line No.	Rev	Author	Line
1	2	jvillar	`-- File: wb_lcd.vhd`
2			`-- Generated by MyHDL 0.6`
3			`-- Date: Mon Apr 20 03:13:35 2009`
4
5
6			`package pck_wb_lcd is`
7
8			`type t_enum_t_TxState_2 is (`
9			`tx_high_setup,`
10			`tx_high_hold,`
11			`tx_oneus,`
12			`tx_low_setup,`
13			`tx_low_hold,`
14			`tx_fortyus,`
15			`tx_done`
16			`);`
17			`type t_enum_t_State_1 is (`
18			`display_init,`
19			`init_fifteenms,`
20			`init_one,`
21			`init_two,`
22			`init_three,`
23			`init_four,`
24			`init_five,`
25			`init_six,`
26			`init_seven,`
27			`init_eight,`
28			`display_function_set,`
29			`display_entry_set,`
30			`display_set_display,`
31			`display_clr_display,`
32			`display_pause_setup,`
33			`display_pause,`
34			`display_done,`
35			`display_set_addr,`
36			`display_char_write`
37			`);`
38
39			`end package pck_wb_lcd;`
40
41			`library IEEE;`
42			`use IEEE.std_logic_1164.all;`
43			`use IEEE.numeric_std.all;`
44			`use std.textio.all;`
45
46			`use work.pck_myhdl_06.all;`
47
48			`use work.pck_wb_lcd.all;`
49
50			`entity wb_lcd is`
51			`port (`
52			`wb_clk_i: in std_logic;`
53			`wb_rst_i: in std_logic;`
54			`wb_dat_i: in unsigned(31 downto 0);`
55			`wb_dat_o: out unsigned(31 downto 0);`
56			`wb_adr_i: in unsigned(31 downto 0);`
57			`wb_sel_i: in unsigned(3 downto 0);`
58			`wb_we_i: in std_logic;`
59			`wb_cyc_i: in std_logic;`
60			`wb_stb_i: in std_logic;`
61			`wb_ack_o: out std_logic;`
62			`SF_D: out unsigned(3 downto 0);`
63			`LCD_E: out std_logic;`
64			`LCD_RS: out std_logic;`
65			`LCD_RW: out std_logic`
66			`);`
67			`end entity wb_lcd;`
68
69			`architecture MyHDL of wb_lcd is`
70
71			`signal busy: std_logic;`
72			`signal lcd_we: std_logic;`
73			`signal mylcd_tx_init: std_logic;`
74			`signal mylcd_delay_load: std_logic;`
75			`signal mylcd_tx_done: std_logic;`
76			`signal mylcd_SF_D1: unsigned(3 downto 0);`
77			`signal mylcd_SF_D0: unsigned(3 downto 0);`
78			`signal mylcd_LCD_E1: std_logic;`
79			`signal mylcd_LCD_E0: std_logic;`
80			`signal mylcd_delay_done: std_logic;`
81			`signal mylcd_tx_byte: unsigned(7 downto 0);`
82			`signal mylcd_wr_addr: unsigned(6 downto 0);`
83			`signal mylcd_output_selector: std_logic;`
84			`signal mylcd_state: t_enum_t_State_1;`
85			`signal mylcd_tx_delay_value: unsigned(19 downto 0);`
86			`signal mylcd_main_delay_value: unsigned(19 downto 0);`
87			`signal mylcd_tx_delay_load: std_logic;`
88			`signal mylcd_delay_value: unsigned(19 downto 0);`
89			`signal mylcd_wr_dat: unsigned(6 downto 0);`
90			`signal mylcd_main_delay_load: std_logic;`
91			`signal mylcd_tx_state: t_enum_t_TxState_2;`
92			`signal mylcd_counter_counter: unsigned(20 downto 0);`
93
94			`begin`
95
96
97			`WB_LCD_WISHBONE_LOGIC: process (busy, wb_we_i, wb_stb_i, wb_cyc_i, wb_adr_i) is`
98			`begin`
99			`wb_ack_o <= (wb_cyc_i and wb_stb_i);`
100
101			`lcd_we <= (wb_cyc_i and wb_stb_i and wb_we_i and to_std_logic(wb_adr_i /= 128));`
102			`if to_boolean(busy) then`
103			`wb_dat_o <= "00000000000000000000000000000001";`
104			`else`
105			`wb_dat_o <= "00000000000000000000000000000000";`
106			`end if;`
107			`end process WB_LCD_WISHBONE_LOGIC;`
108
109
110			`mylcd_output_selector <= ((mylcd_state = display_init) or (mylcd_state = init_fifteenms) or (mylcd_state = init_one) or (mylcd_state = init_two) or (mylcd_state = init_three) or (mylcd_state = init_four) or (mylcd_state = init_five) or (mylcd_state = init_six) or (mylcd_state = init_seven) or (mylcd_state = init_eight));`
111
112			`WB_LCD_MYLCD_CONUNTER_SHARING_VALUE: process (mylcd_main_delay_value, mylcd_tx_delay_load, mylcd_tx_delay_value) is`
113			`begin`
114			`if to_boolean(mylcd_tx_delay_load) then`
115			`mylcd_delay_value <= mylcd_tx_delay_value;`
116			`else`
117			`mylcd_delay_value <= mylcd_main_delay_value;`
118			`end if;`
119			`end process WB_LCD_MYLCD_CONUNTER_SHARING_VALUE;`
120
121			`WB_LCD_MYLCD_DISPLAYFSM: process (wb_clk_i, wb_rst_i) is`
122			`begin`
123			`if (wb_rst_i = '1') then`
124			`mylcd_state <= display_init;`
125			`mylcd_main_delay_load <= '0';`
126			`mylcd_main_delay_value <= "00000000000000000000";`
127			`mylcd_SF_D1 <= "0000";`
128			`mylcd_LCD_E1 <= '0';`
129			`mylcd_tx_byte <= "00000000";`
130			`elsif rising_edge(wb_clk_i) then`
131			`mylcd_main_delay_load <= '0';`
132
133			`mylcd_main_delay_value <= "00000000000000000000";`
134
135			`case mylcd_state is`
136			`when display_init =>`
137			`mylcd_tx_byte <= "00000000";`
138			`mylcd_state <= init_fifteenms;`
139			`mylcd_main_delay_load <= '1';`
140			`mylcd_main_delay_value <= "10110111000110110000";`
141			`when init_fifteenms =>`
142			`mylcd_main_delay_load <= '0';`
143			`if to_boolean(mylcd_delay_done) then`
144			`mylcd_state <= init_one;`
145
146			`mylcd_main_delay_load <= '1';`
147			`mylcd_main_delay_value <= "00000000000000001011";`
148			`end if;`
149			`when init_one =>`
150			`mylcd_main_delay_load <= '0';`
151			`mylcd_SF_D1 <= "0011";`
152			`mylcd_LCD_E1 <= '1';`
153			`if to_boolean(mylcd_delay_done) then`
154			`mylcd_state <= init_two;`
155
156			`mylcd_main_delay_load <= '1';`
157			`mylcd_main_delay_value <= "00110010000011001000";`
158			`end if;`
159			`when init_two =>`
160			`mylcd_main_delay_load <= '0';`
161			`mylcd_LCD_E1 <= '0';`
162			`if to_boolean(mylcd_delay_done) then`
163			`mylcd_state <= init_three;`
164
165			`mylcd_main_delay_load <= '1';`
166			`mylcd_main_delay_value <= "00000000000000001011";`
167			`end if;`
168			`when init_three =>`
169			`mylcd_main_delay_load <= '0';`
170			`mylcd_SF_D1 <= "0011";`
171			`mylcd_LCD_E1 <= '1';`
172			`if to_boolean(mylcd_delay_done) then`
173			`mylcd_state <= init_four;`
174
175			`mylcd_main_delay_load <= '1';`
176			`mylcd_main_delay_value <= "00000001001110001000";`
177			`end if;`
178			`when init_four =>`
179			`mylcd_main_delay_load <= '0';`
180			`mylcd_LCD_E1 <= '0';`
181			`if to_boolean(mylcd_delay_done) then`
182			`mylcd_state <= init_five;`
183
184			`mylcd_main_delay_load <= '1';`
185			`mylcd_main_delay_value <= "00000000000000001011";`
186			`end if;`
187			`when init_five =>`
188			`mylcd_main_delay_load <= '0';`
189			`mylcd_SF_D1 <= "0011";`
190			`mylcd_LCD_E1 <= '1';`
191			`if to_boolean(mylcd_delay_done) then`
192			`mylcd_state <= init_six;`
193
194			`mylcd_main_delay_load <= '1';`
195			`mylcd_main_delay_value <= "00000000011111010000";`
196			`end if;`
197			`when init_six =>`
198			`mylcd_main_delay_load <= '0';`
199			`mylcd_LCD_E1 <= '0';`
200			`if to_boolean(mylcd_delay_done) then`
201			`mylcd_state <= init_seven;`
202
203			`mylcd_main_delay_load <= '1';`
204			`mylcd_main_delay_value <= "00000000000000001011";`
205			`end if;`
206			`when init_seven =>`
207			`mylcd_main_delay_load <= '0';`
208			`mylcd_SF_D1 <= "0010";`
209			`mylcd_LCD_E1 <= '1';`
210			`if to_boolean(mylcd_delay_done) then`
211			`mylcd_state <= init_eight;`
212
213			`mylcd_main_delay_load <= '1';`
214			`mylcd_main_delay_value <= "00000000011111010000";`
215			`end if;`
216			`when init_eight =>`
217			`mylcd_main_delay_load <= '0';`
218			`mylcd_LCD_E1 <= '0';`
219			`if to_boolean(mylcd_delay_done) then`
220			`mylcd_state <= display_function_set;`
221
222			`end if;`
223			`when display_function_set =>`
224			`mylcd_tx_byte <= "00101000";`
225			`if to_boolean(mylcd_tx_done) then`
226			`mylcd_state <= display_entry_set;`
227			`end if;`
228			`when display_entry_set =>`
229			`mylcd_tx_byte <= "00000110";`
230			`if to_boolean(mylcd_tx_done) then`
231			`mylcd_state <= display_set_display;`
232			`end if;`
233			`when display_set_display =>`
234			`mylcd_tx_byte <= "00001100";`
235			`if to_boolean(mylcd_tx_done) then`
236			`mylcd_state <= display_clr_display;`
237			`end if;`
238			`when display_clr_display =>`
239			`mylcd_tx_byte <= "00000001";`
240			`if to_boolean(mylcd_tx_done) then`
241			`mylcd_state <= display_pause;`
242			`mylcd_main_delay_load <= '1';`
243			`mylcd_main_delay_value <= "00010100000001010000";`
244			`end if;`
245			`when display_pause_setup =>`
246			`mylcd_state <= display_pause;`
247			`when display_pause =>`
248			`mylcd_tx_byte <= "00000000";`
249			`if to_boolean(mylcd_delay_done) then`
250			`mylcd_state <= display_done;`
251
252			`end if;`
253			`when display_done =>`
254			`mylcd_tx_byte <= "00000000";`
255			`if to_boolean(lcd_we) then`
256			`mylcd_state <= display_set_addr;`
257			`mylcd_wr_addr <= resize(wb_adr_i, 7);`
258			`mylcd_wr_dat <= resize(wb_dat_i, 7);`
259			`else`
260			`mylcd_state <= display_done;`
261			`end if;`
262			`when display_set_addr =>`
263			`mylcd_tx_byte <= ("10000000" or mylcd_wr_addr);`
264			`if to_boolean(mylcd_tx_done) then`
265			`mylcd_state <= display_char_write;`
266			`end if;`
267			`when display_char_write =>`
268			`mylcd_tx_byte <= resize(mylcd_wr_dat, 8);`
269			`if to_boolean(mylcd_tx_done) then`
270			`mylcd_state <= display_done;`
271
272			`end if;`
273			`end case;`
274			`end if;`
275			`end process WB_LCD_MYLCD_DISPLAYFSM;`
276
277			`WB_LCD_MYLCD_TXFSM: process (wb_clk_i, wb_rst_i) is`
278			`begin`
279			`if (wb_rst_i = '1') then`
280			`mylcd_tx_state <= tx_done;`
281			`mylcd_SF_D0 <= "0000";`
282			`mylcd_LCD_E0 <= '0';`
283			`elsif rising_edge(wb_clk_i) then`
284			`mylcd_tx_delay_load <= '0';`
285
286			`mylcd_tx_delay_value <= "00000000000000000000";`
287
288			`case mylcd_tx_state is`
289			`when tx_high_setup =>`
290			`mylcd_LCD_E0 <= '0';`
291			`mylcd_SF_D0 <= mylcd_tx_byte(8-1 downto 4);`
292			`mylcd_tx_delay_load <= '0';`
293			`if to_boolean(mylcd_delay_done) then`
294			`mylcd_tx_state <= tx_high_hold;`
295			`mylcd_tx_delay_load <= '1';`
296			`mylcd_tx_delay_value <= "00000000000000001100";`
297			`end if;`
298			`when tx_high_hold =>`
299			`mylcd_LCD_E0 <= '1';`
300			`mylcd_SF_D0 <= mylcd_tx_byte(8-1 downto 4);`
301			`mylcd_tx_delay_load <= '0';`
302			`if to_boolean(mylcd_delay_done) then`
303			`mylcd_tx_state <= tx_oneus;`
304			`mylcd_tx_delay_load <= '1';`
305			`mylcd_tx_delay_value <= "00000000000000110010";`
306			`end if;`
307			`when tx_oneus =>`
308			`mylcd_LCD_E0 <= '0';`
309			`mylcd_tx_delay_load <= '0';`
310			`if to_boolean(mylcd_delay_done) then`
311			`mylcd_tx_state <= tx_low_setup;`
312			`mylcd_tx_delay_load <= '1';`
313			`mylcd_tx_delay_value <= "00000000000000000010";`
314			`end if;`
315			`when tx_low_setup =>`
316			`mylcd_LCD_E0 <= '0';`
317			`mylcd_SF_D0 <= mylcd_tx_byte(4-1 downto 0);`
318			`mylcd_tx_delay_load <= '0';`
319			`if to_boolean(mylcd_delay_done) then`
320			`mylcd_tx_state <= tx_low_hold;`
321			`mylcd_tx_delay_load <= '1';`
322			`mylcd_tx_delay_value <= "00000000000000001100";`
323			`end if;`
324			`when tx_low_hold =>`
325			`mylcd_LCD_E0 <= '1';`
326			`mylcd_SF_D0 <= mylcd_tx_byte(4-1 downto 0);`
327			`mylcd_tx_delay_load <= '0';`
328			`if to_boolean(mylcd_delay_done) then`
329			`mylcd_tx_state <= tx_fortyus;`
330			`mylcd_tx_delay_load <= '1';`
331			`mylcd_tx_delay_value <= "00000000011111010000";`
332			`end if;`
333			`when tx_fortyus =>`
334			`mylcd_LCD_E0 <= '0';`
335			`mylcd_tx_delay_load <= '0';`
336			`if to_boolean(mylcd_delay_done) then`
337			`mylcd_tx_state <= tx_done;`
338			`mylcd_tx_done <= '1';`
339			`end if;`
340			`when tx_done =>`
341			`mylcd_LCD_E0 <= '0';`
342			`mylcd_tx_done <= '0';`
343			`mylcd_tx_delay_load <= '0';`
344			`if to_boolean(mylcd_tx_init) then`
345			`mylcd_tx_state <= tx_high_setup;`
346			`mylcd_tx_delay_load <= '1';`
347			`mylcd_tx_delay_value <= "00000000000000000010";`
348			`end if;`
349			`end case;`
350			`end if;`
351			`end process WB_LCD_MYLCD_TXFSM;`
352
353
354			`mylcd_delay_load <= to_std_logic(to_boolean(mylcd_tx_delay_load) or to_boolean(mylcd_main_delay_load));`
355
356
357			`busy <= to_std_logic(mylcd_state /= display_done);`
358			`LCD_RW <= '0';`
359
360			`WB_LCD_MYLCD_OUTPUT_TX_OR_INIT_MUX: process (mylcd_SF_D1, mylcd_SF_D0, mylcd_LCD_E1, mylcd_LCD_E0, mylcd_output_selector) is`
361			`begin`
362			`if to_boolean(mylcd_output_selector) then`
363			`SF_D <= mylcd_SF_D1;`
364			`LCD_E <= mylcd_LCD_E1;`
365			`else`
366			`SF_D <= mylcd_SF_D0;`
367			`LCD_E <= mylcd_LCD_E0;`
368			`end if;`
369			`end process WB_LCD_MYLCD_OUTPUT_TX_OR_INIT_MUX;`
370
371
372			`mylcd_tx_init <= ((not mylcd_tx_done) and ((mylcd_state = display_function_set) or (mylcd_state = display_entry_set) or (mylcd_state = display_set_display) or (mylcd_state = display_clr_display) or (mylcd_state = display_set_addr) or (mylcd_state = display_char_write)));`
373			`LCD_RS <= (not ((mylcd_state = display_function_set) or (mylcd_state = display_entry_set) or (mylcd_state = display_set_display) or (mylcd_state = display_clr_display) or (mylcd_state = display_set_addr)));`
374
375
376			`mylcd_delay_done <= to_std_logic(mylcd_counter_counter = 0);`
377
378			`WB_LCD_MYLCD_COUNTER_COUNTDOWN_LOGIC: process (wb_clk_i) is`
379			`begin`
380			`if rising_edge(wb_clk_i) then`
381			`if to_boolean(mylcd_delay_load) then`
382			`mylcd_counter_counter <= resize(mylcd_delay_value, 21);`
383			`else`
384			`mylcd_counter_counter <= (mylcd_counter_counter - 1);`
385			`end if;`
386			`end if;`
387			`end process WB_LCD_MYLCD_COUNTER_COUNTDOWN_LOGIC;`
388
389			`end architecture MyHDL;`