-- History
d_new_eingabe : in std_logic;
d_new_result : in std_logic;
+ d_new_bs : in std_logic;
d_zeile : out hzeile;
d_spalte : out hspalte;
d_get : out std_logic;
end entity display;
architecture beh of display is
- type DISPLAY_STATE is (SIDLE, S_NEW_RESULT, S_NEW_INPUT, S_COUNTUP, S_GETCH,
- S_CR1, S_NL1, S_PUTCH1, S_PUTCH2, S_WAIT, S_NOP1);
+ type DISPLAY_STATE is (S_INIT, SIDLE, S_NEW_BS, S_BACK, S_BLANK, S_NEW_RESULT,
+ S_ZEILEUP, S_NEW_INPUT, S_COUNTUP, S_GETCH, S_CR1, S_NL1, S_PUTCH1,
+ S_PUTCH2, S_WAIT, S_NOP1, S_READ_RESULT_0, S_READ_RESULT_1,
+ S_READ_RESULT_2, S_PS1_0, S_PS1_1, S_PS1_2, S_PS1_3, S_PS1_4,
+ S_PS1_5);
+ type DISPLAY_ISTATE is (IS_BACK_2_BLANK, IS_BLANK_2_BACK,
+ IS_NL1_2_ZEILEUP, IS_RESULT2_2_CR1, IS_CR1_2_NL1, IS_NL1_2_RESULT0,
+ IS_RESULT0_2_RESULT1, IS_RESULT1_2_RESULT2, IS_ZEILEUP_2_PS10,
+ IS_PS10_2_PS11, IS_PS11_2_PS12, IS_PS12_2_PS13, IS_PS13_2_PS14,
+ IS_PS14_2_PS15, IS_RANDOM_2_IDLE, IS_OTHER_2_NL1);
+
signal state_int, state_next : DISPLAY_STATE;
+ signal istate_next, istate_int : DISPLAY_ISTATE;
signal d_zeile_int, d_zeile_next : hzeile;
signal d_spalte_int, d_spalte_next : hspalte;
signal d_get_int, d_get_next : std_logic;
signal command_int, command_next : std_logic_vector(7 downto 0);
signal command_data_int, command_data_next : std_logic_vector(31 downto 0);
- signal istate_next, istate_int : signed(2 downto 0);
begin
d_zeile <= d_zeile_int;
d_spalte <= d_spalte_int;
begin
if sys_res_n = '0' then
-- internal
- state_int <= SIDLE;
- istate_int <= (others => '0');
+ state_int <= S_INIT;
+ istate_int <= IS_RANDOM_2_IDLE;
-- out
d_zeile_int <= (others => '0');
d_spalte_int <= (others => '0');
end process;
-- next state
- process(state_int, d_new_result, d_new_eingabe, d_done, free, d_spalte_int,
- d_char, istate_int)
+ process(state_int, d_new_result, d_new_eingabe, d_new_bs, d_done, free,
+ d_spalte_int, d_char, istate_int)
begin
state_next <= state_int;
istate_next <= istate_int;
case state_int is
+ when S_INIT =>
+ state_next <= S_PS1_0;
+
+ when S_PS1_0 =>
+ istate_next <= IS_PS10_2_PS11;
+ state_next <= S_WAIT;
+ when S_PS1_1 =>
+ istate_next <= IS_PS11_2_PS12;
+ state_next <= S_WAIT;
+ when S_PS1_2 =>
+ istate_next <= IS_PS12_2_PS13;
+ state_next <= S_WAIT;
+ when S_PS1_3 =>
+ istate_next <= IS_PS13_2_PS14;
+ state_next <= S_WAIT;
+ when S_PS1_4 =>
+ istate_next <= IS_PS14_2_PS15;
+ state_next <= S_WAIT;
+ when S_PS1_5 =>
+ istate_next <= IS_RANDOM_2_IDLE;
+ state_next <= S_WAIT;
+
when SIDLE =>
- istate_next <= b"111"; -- default: immer wieder ins SIDLE;
- if d_new_eingabe = '1' then
+ istate_next <= IS_RANDOM_2_IDLE;
+ if d_new_bs = '1' then
+ state_next <= S_NEW_BS;
+ elsif d_new_eingabe = '1' then
state_next <= S_NEW_INPUT;
end if;
if d_new_result = '1' then
state_next <= S_NEW_RESULT;
end if;
+
when S_NEW_RESULT =>
- state_next <= S_CR1;
+ state_next <= S_ZEILEUP;
when S_NEW_INPUT =>
state_next <= S_COUNTUP;
+
+ when S_NEW_BS =>
+ state_next <= S_BACK;
+ when S_BACK =>
+ if free = '0' then
+ state_next <= S_WAIT;
+ case istate_int is
+ when IS_RANDOM_2_IDLE => istate_next <= IS_BACK_2_BLANK;
+ when others => istate_next <= IS_RANDOM_2_IDLE;
+ end case;
+ end if;
+ when S_BLANK =>
+ if free = '0' then
+ state_next <= S_WAIT;
+ istate_next <= IS_BLANK_2_BACK;
+ end if;
+
+ when S_ZEILEUP =>
+ case istate_int is
+ when IS_NL1_2_ZEILEUP =>
+ state_next <= S_WAIT;
+ istate_next <= IS_ZEILEUP_2_PS10;
+ when others => state_next <= S_CR1;
+ end case;
+
when S_CR1 =>
if free = '0' then
state_next <= S_WAIT;
- istate_next <= b"000"; -- => danach S_NL1
+ case istate_int is
+ when IS_RESULT2_2_CR1 => istate_next <= IS_OTHER_2_NL1;
+ when others => istate_next <= IS_CR1_2_NL1;
+ end case;
end if;
when S_NL1 =>
if free = '0' then
state_next <= S_WAIT;
- istate_next <= b"111"; -- => wieder nach SIDLE
+ case istate_int is
+ when IS_OTHER_2_NL1 => istate_next <= IS_NL1_2_ZEILEUP;
+ when others => istate_next <= IS_NL1_2_RESULT0;
+ end case;
+ end if;
+
+ when S_READ_RESULT_0 =>
+ istate_next <= IS_RESULT0_2_RESULT1;
+ state_next <= S_WAIT;
+ when S_READ_RESULT_1 =>
+ istate_next <= IS_RESULT1_2_RESULT2;
+ state_next <= S_WAIT;
+ when S_READ_RESULT_2 =>
+ if unsigned(d_spalte_int) /= HSPALTE_MAX-1 then
+ state_next <= S_COUNTUP;
+ istate_next <= IS_RESULT1_2_RESULT2;
+ else
+ state_next <= S_WAIT;
+ istate_next <= IS_RESULT2_2_CR1;
end if;
+
when S_COUNTUP =>
state_next <= S_GETCH;
when S_GETCH =>
when S_PUTCH1 =>
state_next <= S_PUTCH2;
when S_PUTCH2 =>
- if free = '0' or (free = '1' and d_char = x"00") then
+ if free = '0' then
state_next <= S_WAIT;
end if;
when S_WAIT =>
when S_NOP1 =>
if free = '1' then
case istate_int is
- when b"000" => state_next <= S_NL1;
- when others => state_next <= SIDLE;
+ when IS_CR1_2_NL1 => state_next <= S_NL1;
+ when IS_BACK_2_BLANK => state_next <= S_BLANK;
+ when IS_BLANK_2_BACK => state_next <= S_BACK;
+ when IS_NL1_2_ZEILEUP => state_next <= S_ZEILEUP;
+ when IS_RESULT2_2_CR1 => state_next <= S_CR1;
+ when IS_OTHER_2_NL1 => state_next <= S_NL1;
+
+ when IS_NL1_2_RESULT0 => state_next <= S_READ_RESULT_0;
+ when IS_RESULT0_2_RESULT1 => state_next <= S_READ_RESULT_1;
+ when IS_RESULT1_2_RESULT2 => state_next <= S_READ_RESULT_2;
+
+ when IS_ZEILEUP_2_PS10 => state_next <= S_PS1_0;
+ when IS_PS10_2_PS11 => state_next <= S_PS1_1;
+ when IS_PS11_2_PS12 => state_next <= S_PS1_2;
+ when IS_PS12_2_PS13 => state_next <= S_PS1_3;
+ when IS_PS13_2_PS14 => state_next <= S_PS1_4;
+ when IS_PS14_2_PS15 => state_next <= S_PS1_5;
+ when IS_RANDOM_2_IDLE => state_next <= SIDLE;
end case;
end if;
end case;
command_data_next <= command_data_int;
case state_int is
- when SIDLE =>
- null;
- when S_NEW_INPUT =>
- null;
- when S_NEW_RESULT =>
+ when S_INIT => null;
+
+ when S_PS1_0 =>
+ command_next <= COMMAND_SET_CHAR;
+ command_data_next <= x"0000ff" & x"28"; -- '('
+ when S_PS1_1 =>
+ command_next <= COMMAND_SET_CHAR;
+ command_data_next <= x"00ff00" & zeile2char(d_zeile_int,1); -- 'x'
+ when S_PS1_2 =>
+ command_next <= COMMAND_SET_CHAR;
+ command_data_next <= x"00ff00" & zeile2char(d_zeile_int,2); -- 'y'
+ when S_PS1_3 =>
+ command_next <= COMMAND_SET_CHAR;
+ command_data_next <= x"0000ff" & x"29"; -- ')'
+ when S_PS1_4 =>
+ command_next <= COMMAND_SET_CHAR;
+ command_data_next <= x"00ffff" & x"24"; -- '$'
+ when S_PS1_5 =>
+ command_next <= COMMAND_SET_CHAR;
+ command_data_next <= x"ffffff" & x"20"; -- ' '
+
+ when SIDLE => null;
+ when S_NEW_RESULT => null;
+ when S_NEW_INPUT => null;
+
+ when S_NEW_BS =>
+ -- underflow check schon im history modul
+ d_spalte_next <= std_logic_vector(unsigned(d_spalte_int) - 1);
+ when S_BACK =>
+ -- einen schritt zurueck, +6 wegen $PS1
+ command_next <= COMMAND_SET_CURSOR_COLUMN;
+ command_data_next <= x"ffffff" & '0' & std_logic_vector(unsigned(d_spalte_int) + 6);
+ when S_BLANK =>
+ command_next <= COMMAND_SET_CHAR;
+ command_data_next <= x"ffffff" & x"20"; -- white space
+
+ when S_ZEILEUP =>
d_spalte_next <= (others => '0');
case d_zeile_int is
- when "11111" => d_zeile_next <= "00000";
+ when
+ std_logic_vector(to_unsigned(HZEILE_MAX-1,d_zeile_int'length)) => d_zeile_next <= (others => '0');
when others => d_zeile_next <= std_logic_vector(unsigned(d_zeile_int) + 1);
end case;
+
when S_CR1 =>
command_next <= COMMAND_SET_CHAR;
command_data_next <= x"ffffff" & x"0d"; -- carrige return
when S_NL1 =>
command_next <= COMMAND_SET_CHAR;
command_data_next <= x"ffffff" & x"0a"; -- newline
+
+ when S_READ_RESULT_0 =>
+ command_next <= COMMAND_SET_CHAR;
+ command_data_next <= x"ff0000" & x"3e"; -- '>'
+ when S_READ_RESULT_1 =>
+ command_next <= COMMAND_SET_CHAR;
+ command_data_next <= x"ffffff" & x"20"; -- ' '
+ when S_READ_RESULT_2 => null;
+
when S_COUNTUP =>
d_get_next <= '1';
d_spalte_next <= std_logic_vector(unsigned(d_spalte_int) + 1);
when S_GETCH =>
d_get_next <= '1';
when S_PUTCH1 =>
- if d_char /= x"00" then
- command_next <= COMMAND_SET_CHAR;
+ command_next <= COMMAND_SET_CHAR;
+ if d_char = x"00" then
+ command_data_next <= x"ffffff" & x"20";
+ else
command_data_next <= x"ffffff" & std_logic_vector(d_char);
end if;
when S_PUTCH2 => null;
projects / hwmod.git / blobdiff