end entity display;
architecture beh of display is
- type DISPLAY_STATE is (SIDLE, S_NEW_BS, S_BACK, S_BLANK, S_NEW_RESULT,
+ 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_INIT, S_PS1_0, S_PS1_1, S_PS1_2, S_PS1_3, S_PS1_4,
+ 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(4 downto 0);
begin
d_zeile <= d_zeile_int;
d_spalte <= d_spalte_int;
if sys_res_n = '0' then
-- internal
state_int <= S_INIT;
- istate_int <= (others => '0');
+ istate_int <= IS_RANDOM_2_IDLE;
-- out
d_zeile_int <= (others => '0');
d_spalte_int <= (others => '0');
state_next <= S_PS1_0;
when S_PS1_0 =>
- istate_next <= b"01001";
+ istate_next <= IS_PS10_2_PS11;
state_next <= S_WAIT;
when S_PS1_1 =>
- istate_next <= b"01010";
+ istate_next <= IS_PS11_2_PS12;
state_next <= S_WAIT;
when S_PS1_2 =>
- istate_next <= b"01011";
+ istate_next <= IS_PS12_2_PS13;
state_next <= S_WAIT;
when S_PS1_3 =>
- istate_next <= b"01100";
+ istate_next <= IS_PS13_2_PS14;
state_next <= S_WAIT;
when S_PS1_4 =>
- istate_next <= b"01101";
+ istate_next <= IS_PS14_2_PS15;
state_next <= S_WAIT;
when S_PS1_5 =>
- istate_next <= b"00111";
+ istate_next <= IS_RANDOM_2_IDLE;
state_next <= S_WAIT;
when SIDLE =>
- istate_next <= b"00111"; -- default: immer wieder ins SIDLE;
+ istate_next <= IS_RANDOM_2_IDLE;
if d_new_bs = '1' then
state_next <= S_NEW_BS;
elsif d_new_eingabe = '1' then
if free = '0' then
state_next <= S_WAIT;
case istate_int is
- when b"00111" => istate_next <= b"00001"; -- => danach S_BLANK und wieder hierher
- when others => istate_next <= b"00111"; -- => danach SIDLE
+ 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 <= b"00010"; -- => danach S_BACK
+ istate_next <= IS_BLANK_2_BACK;
end if;
when S_ZEILEUP =>
case istate_int is
- when b"00011" =>
+ when IS_NL1_2_ZEILEUP =>
state_next <= S_WAIT;
- istate_next <= b"01000"; -- => danach S_PS1
+ istate_next <= IS_ZEILEUP_2_PS10;
when others => state_next <= S_CR1;
end case;
if free = '0' then
state_next <= S_WAIT;
case istate_int is
- when b"00110" => istate_next <= b"00101"; -- => danach S_NL1, S_ZEILEUP, S_PS1, SIDLE
- when others => istate_next <= b"00000"; -- => danach S_NL1 und S_COUNTUP
+ 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;
case istate_int is
- when b"00101" => istate_next <= b"00011"; -- => danach S_ZEILEUP, PS1
- when others => istate_next <= b"10000"; -- => danach S_READ_RESULT_0
+ 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 <= b"10001";
+ istate_next <= IS_RESULT0_2_RESULT1;
state_next <= S_WAIT;
when S_READ_RESULT_1 =>
- istate_next <= b"10010";
+ istate_next <= IS_RESULT1_2_RESULT2;
state_next <= S_WAIT;
when S_READ_RESULT_2 =>
- if unsigned(d_spalte_int) /= 70 then
+ if unsigned(d_spalte_int) /= HSPALTE_MAX-1 then
state_next <= S_COUNTUP;
- istate_next <= b"10010"; -- => wieder nach S_READ_RESULT_2
+ istate_next <= IS_RESULT1_2_RESULT2;
else
state_next <= S_WAIT;
- istate_next <= b"00110"; -- => danach S_CR1 und d_spalte_next clearen und d_zeile_next inkrementieren
+ istate_next <= IS_RESULT2_2_CR1;
end if;
when S_COUNTUP =>
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"00000" => state_next <= S_NL1;
- when b"00001" => state_next <= S_BLANK;
- when b"00010" => state_next <= S_BACK;
- when b"00011" => state_next <= S_ZEILEUP;
- when b"00110" => state_next <= S_CR1;
- when b"00101" => state_next <= S_NL1;
+ 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 b"10000" => state_next <= S_READ_RESULT_0;
- when b"10001" => state_next <= S_READ_RESULT_1;
- when b"10010" => state_next <= S_READ_RESULT_2;
+ 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 b"01000" => state_next <= S_PS1_0;
- when b"01001" => state_next <= S_PS1_1;
- when b"01010" => state_next <= S_PS1_2;
- when b"01011" => state_next <= S_PS1_3;
- when b"01100" => state_next <= S_PS1_4;
- when b"01101" => state_next <= S_PS1_5;
- when others => state_next <= SIDLE;
+ 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;
-- out
process(state_int, d_zeile_int, d_spalte_int, d_get_int, command_int,
command_data_int, d_char)
- function zeile2char(i : std_logic_vector; stelle : natural) return hbyte is
- subtype zeilnum is string(1 to 2);
- type zeilnum_arr is array (natural range 0 to 49) of zeilnum;
- constant zn : zeilnum_arr := (
- 0 => "00", 1 => "01", 2 => "02", 3 => "03", 4 => "04",
- 5 => "05", 6 => "06", 7 => "07", 8 => "08", 9 => "09",
- 10 => "10", 11 => "11", 12 => "12", 13 => "13", 14 => "14",
- 15 => "15", 16 => "16", 17 => "17", 18 => "18", 19 => "19",
- 20 => "20", 21 => "21", 22 => "22", 23 => "23", 24 => "24",
- 25 => "25", 26 => "26", 27 => "27", 28 => "28", 29 => "29",
- 30 => "30", 31 => "31", 32 => "32", 33 => "33", 34 => "34",
- 35 => "35", 36 => "36", 37 => "37", 38 => "38", 39 => "39",
- 40 => "40", 41 => "41", 42 => "42", 43 => "43", 44 => "44",
- 45 => "45", 46 => "46", 47 => "47", 48 => "48", 49 => "49",
- others => "xy");
- variable t : signed(hzeile'length downto 0);
- begin
- t := signed('0' & i);
- t := t / 2;
- return hbyte(to_unsigned(character'pos(zn(to_integer(t))(stelle)),8));
- end;
begin
d_zeile_next <= d_zeile_int;
d_spalte_next <= d_spalte_int;
when S_ZEILEUP =>
d_spalte_next <= (others => '0');
case d_zeile_int is
- -- 49 * 2 + 1
- when "1100010" => d_zeile_next <= (others => '0');
+ 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_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;
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