| 1 |
17 |
sumanta.chaudhuri |
library ieee;
|
| 2 |
|
|
use ieee.std_logic_1164.all;
|
| 3 |
|
|
--use ieee.numeric_bit.all;
|
| 4 |
|
|
use ieee.std_logic_arith.all;
|
| 5 |
|
|
|
| 6 |
|
|
|
| 7 |
|
|
|
| 8 |
|
|
entity safe_test is
|
| 9 |
|
|
generic(INPUT_LENGTH:integer:=6;OUTPUT_LENGTH:integer:=6);
|
| 10 |
|
|
port(
|
| 11 |
|
|
clk:in std_ulogic;
|
| 12 |
|
|
rst:in std_ulogic;
|
| 13 |
|
|
--Config Signals
|
| 14 |
|
|
init_out:out std_ulogic;
|
| 15 |
|
|
config_mode_out:out std_ulogic;
|
| 16 |
|
|
config_out0:out std_ulogic;
|
| 17 |
|
|
config_out1:out std_ulogic;
|
| 18 |
|
|
config_ack_in:in std_ulogic;
|
| 19 |
|
|
--DE2 Control SIgnals
|
| 20 |
|
|
msg_out:out std_ulogic_vector(2 downto 0);
|
| 21 |
|
|
Ack_count_out:out std_logic_vector(31 downto 0);
|
| 22 |
|
|
cmd:in std_ulogic_vector(4 downto 0);
|
| 23 |
|
|
--SRAM
|
| 24 |
|
|
SRAM_DATA_OUT: OUT std_logic_vector(15 downto 0);
|
| 25 |
|
|
SRAM_DATA: in std_logic_vector(15 downto 0);
|
| 26 |
|
|
SRAM_ADDR: out std_logic_vector(23 downto 0);
|
| 27 |
|
|
SRAM_WEN: out std_logic;
|
| 28 |
|
|
SRAM_OEN: out std_logic;
|
| 29 |
|
|
--SDRAM
|
| 30 |
|
|
SDRAM_DATA: out std_logic_vector(15 downto 0);
|
| 31 |
|
|
SDRAM_ADDR: out std_logic_vector(23 downto 0);
|
| 32 |
|
|
SDRAM_WEN: out std_logic;
|
| 33 |
|
|
SDRAM_OEN: out std_logic;
|
| 34 |
|
|
--Result Vectors
|
| 35 |
|
|
INPUT_ASYNC_0: in std_ulogic_vector(INPUT_LENGTH-1 downto 0);
|
| 36 |
|
|
INPUT_ASYNC_1: in std_ulogic_vector(INPUT_LENGTH-1 downto 0);
|
| 37 |
|
|
INPUT_ASYNC_ACKOUT: out std_ulogic_vector(INPUT_LENGTH-1 downto 0);
|
| 38 |
|
|
--Test Vectors
|
| 39 |
|
|
OUTPUT_ASYNC_0: out std_ulogic_vector(OUTPUT_LENGTH-1 downto 0);
|
| 40 |
|
|
OUTPUT_ASYNC_1: out std_ulogic_vector(OUTPUT_LENGTH-1 downto 0);
|
| 41 |
|
|
OUTPUT_ASYNC_ACKIN: in std_ulogic_vector(OUTPUT_LENGTH-1 downto 0);
|
| 42 |
|
|
|
| 43 |
|
|
--Trigger for oscilloscope
|
| 44 |
|
|
trigger: out std_ulogic
|
| 45 |
|
|
|
| 46 |
|
|
);
|
| 47 |
|
|
end entity safe_test;
|
| 48 |
|
|
|
| 49 |
|
|
|
| 50 |
|
|
architecture machine_a_etat of safe_test is
|
| 51 |
|
|
component S_TO_AS_CONFIG is
|
| 52 |
|
|
generic (BEGIN_ADDR:integer:=0;END_ADDR:integer:=0;LENGTH:integer:=16);
|
| 53 |
|
|
port(
|
| 54 |
|
|
clk:in std_ulogic;
|
| 55 |
|
|
rst:in std_ulogic;
|
| 56 |
|
|
|
| 57 |
|
|
SRAM_DATA_OUT: out std_logic_vector(15 downto 0);
|
| 58 |
|
|
SRAM_DATA: in std_logic_vector(15 downto 0);
|
| 59 |
|
|
SRAM_ADDR: out std_logic_vector(23 downto 0);
|
| 60 |
|
|
SRAM_WEN: out std_logic;
|
| 61 |
|
|
SRAM_OEN: out std_logic;
|
| 62 |
|
|
|
| 63 |
|
|
AS_OUT0: out std_ulogic;
|
| 64 |
|
|
AS_OUT1: out std_ulogic;
|
| 65 |
|
|
ACK_IN: in std_ulogic;
|
| 66 |
|
|
|
| 67 |
|
|
config_enable: in std_ulogic; -- Command from the state_machine up there
|
| 68 |
|
|
ACK_COUNT_OUT: out std_logic_vector(31 downto 0)
|
| 69 |
|
|
);
|
| 70 |
|
|
end component S_TO_AS_CONFIG;
|
| 71 |
|
|
|
| 72 |
|
|
component AS_TO_S_VECTOR is
|
| 73 |
|
|
generic (BEGIN_ADDR:integer:=0;END_ADDR:integer:=0;LENGTH:integer:=16);
|
| 74 |
|
|
port(
|
| 75 |
|
|
clk:in std_ulogic;
|
| 76 |
|
|
rst:in std_ulogic;
|
| 77 |
|
|
|
| 78 |
|
|
SRAM_DATA: out std_logic_vector(15 downto 0);
|
| 79 |
|
|
SRAM_ADDR: out std_logic_vector(23 downto 0);
|
| 80 |
|
|
SRAM_WEN: out std_logic;
|
| 81 |
|
|
SRAM_OEN: out std_logic;
|
| 82 |
|
|
|
| 83 |
|
|
I_ASYNC_0: in std_ulogic_vector(LENGTH-1 downto 0);
|
| 84 |
|
|
I_ASYNC_1: in std_ulogic_vector(LENGTH-1 downto 0);
|
| 85 |
|
|
I_ASYNC_ACK_OUT: out std_ulogic_vector(LENGTH-1 downto 0);
|
| 86 |
|
|
|
| 87 |
|
|
vector_enable: in std_ulogic; -- Command from the state_machine up there
|
| 88 |
|
|
ACK_COUNT_OUT: out std_logic_vector(31 downto 0)
|
| 89 |
|
|
);
|
| 90 |
|
|
end component AS_TO_S_VECTOR;
|
| 91 |
|
|
|
| 92 |
|
|
component S_TO_AS_VECTOR is
|
| 93 |
|
|
generic (BEGIN_ADDR:integer:=0;END_ADDR:integer:=0;LENGTH:integer:=16);
|
| 94 |
|
|
port(
|
| 95 |
|
|
clk:in std_ulogic;
|
| 96 |
|
|
rst:in std_ulogic;
|
| 97 |
|
|
trigger:out std_ulogic;
|
| 98 |
|
|
|
| 99 |
|
|
SRAM_DATA: in std_logic_vector(15 downto 0);
|
| 100 |
|
|
SRAM_ADDR: out std_logic_vector(23 downto 0);
|
| 101 |
|
|
SRAM_WEN: out std_logic;
|
| 102 |
|
|
SRAM_OEN: out std_logic;
|
| 103 |
|
|
|
| 104 |
|
|
O_ASYNC_0: out std_ulogic_vector(LENGTH-1 downto 0);
|
| 105 |
|
|
O_ASYNC_1: out std_ulogic_vector(LENGTH-1 downto 0);
|
| 106 |
|
|
O_ASYNC_ACK_IN: in std_ulogic_vector(LENGTH-1 downto 0);
|
| 107 |
|
|
|
| 108 |
|
|
vector_enable: in std_ulogic; -- Command from the state_machine up there
|
| 109 |
|
|
ACK_COUNT_OUT: out std_logic_vector(31 downto 0)
|
| 110 |
|
|
);
|
| 111 |
|
|
end component S_TO_AS_VECTOR;
|
| 112 |
|
|
|
| 113 |
|
|
--type STATE_TYPE is(IDLE,INIT,CONFIG,RUNNING);
|
| 114 |
|
|
--signal state,next_state:STATE_TYPE;
|
| 115 |
|
|
signal msg_out_int:std_ulogic_vector(2 downto 0);
|
| 116 |
|
|
signal count:integer range 0 to integer'high;
|
| 117 |
|
|
signal count_in,count_out:std_logic_vector(31 downto 0);
|
| 118 |
|
|
signal config_enable,run_enable,safe_rst:std_ulogic;
|
| 119 |
|
|
signal SRAM_DATA_TEST,SRAM_DATA_CONFIG:std_logic_vector(15 downto 0);
|
| 120 |
|
|
signal SRAM_ADDR_TEST,SRAM_ADDR_CONFIG:std_logic_vector(23 downto 0);
|
| 121 |
|
|
signal SRAM_WEN_CONFIG,SRAM_WEN_TEST,SRAM_OEN_CONFIG,SRAM_OEN_TEST:std_logic;
|
| 122 |
|
|
signal trig_count:integer range 0 to integer'high;
|
| 123 |
|
|
begin
|
| 124 |
|
|
msg_out<=msg_out_int;
|
| 125 |
|
|
TRANSLATE: S_TO_AS_CONFIG
|
| 126 |
|
|
generic map(BEGIN_ADDR=>0,END_ADDR=>293,LENGTH=>1)
|
| 127 |
|
|
port map(
|
| 128 |
|
|
clk=>clk,
|
| 129 |
|
|
rst=>rst,
|
| 130 |
|
|
|
| 131 |
|
|
SRAM_DATA_OUT=>SRAM_DATA_OUT,
|
| 132 |
|
|
SRAM_DATA=>SRAM_DATA,
|
| 133 |
|
|
SRAM_ADDR=>SRAM_ADDR_CONFIG,
|
| 134 |
|
|
SRAM_WEN=>SRAM_WEN_CONFIG,
|
| 135 |
|
|
SRAM_OEN=>SRAM_OEN_CONFIG,
|
| 136 |
|
|
|
| 137 |
|
|
AS_OUT0=>config_out0,
|
| 138 |
|
|
AS_OUT1=>config_out1,
|
| 139 |
|
|
ACK_IN=>config_ack_in,
|
| 140 |
|
|
|
| 141 |
|
|
config_enable=>config_enable,
|
| 142 |
|
|
ACK_COUNT_OUT=>Ack_count_out);
|
| 143 |
|
|
|
| 144 |
|
|
|
| 145 |
|
|
TRANSLATE_S_TO_AS:S_TO_AS_VECTOR
|
| 146 |
|
|
generic map(BEGIN_ADDR=>4096,END_ADDR=>4159,LENGTH=>OUTPUT_LENGTH)
|
| 147 |
|
|
port map(
|
| 148 |
|
|
clk=>clk,
|
| 149 |
|
|
rst=>safe_rst,
|
| 150 |
|
|
trigger=>trigger,
|
| 151 |
|
|
|
| 152 |
|
|
SRAM_DATA=>SRAM_DATA,
|
| 153 |
|
|
SRAM_ADDR=>SRAM_ADDR_TEST,
|
| 154 |
|
|
SRAM_WEN=>SRAM_WEN_TEST,
|
| 155 |
|
|
SRAM_OEN=>SRAM_OEN_TEST,
|
| 156 |
|
|
|
| 157 |
|
|
O_ASYNC_0=>OUTPUT_ASYNC_0,
|
| 158 |
|
|
O_ASYNC_1=>OUTPUT_ASYNC_1,
|
| 159 |
|
|
O_ASYNC_ACK_IN=>OUTPUT_ASYNC_ACKIN,
|
| 160 |
|
|
|
| 161 |
|
|
vector_enable=>run_enable,
|
| 162 |
|
|
ACK_COUNT_OUT=>count_out
|
| 163 |
|
|
);
|
| 164 |
|
|
TRANSLATE_AS_TO_S:AS_TO_S_VECTOR
|
| 165 |
|
|
generic map(BEGIN_ADDR=>0,END_ADDR=>63,LENGTH=>INPUT_LENGTH)
|
| 166 |
|
|
port map(
|
| 167 |
|
|
clk=>clk,
|
| 168 |
|
|
rst=>safe_rst,
|
| 169 |
|
|
|
| 170 |
|
|
SRAM_DATA=>SDRAM_DATA,
|
| 171 |
|
|
SRAM_ADDR=>SDRAM_ADDR,
|
| 172 |
|
|
SRAM_WEN=>SDRAM_WEN,
|
| 173 |
|
|
SRAM_OEN=>SDRAM_OEN,
|
| 174 |
|
|
|
| 175 |
|
|
I_ASYNC_0=>INPUT_ASYNC_0,
|
| 176 |
|
|
I_ASYNC_1=>INPUT_ASYNC_1,
|
| 177 |
|
|
I_ASYNC_ACK_OUT=>INPUT_ASYNC_ACKOUT,
|
| 178 |
|
|
|
| 179 |
|
|
vector_enable=>run_enable,
|
| 180 |
|
|
ACK_COUNT_OUT=>count_in
|
| 181 |
|
|
);
|
| 182 |
|
|
p1:process(cmd,SRAM_ADDR_CONFIG,SRAM_WEN_CONFIG,SRAM_OEN_CONFIG,SRAM_ADDR_TEST,SRAM_WEN_TEST,SRAM_OEN_TEST)
|
| 183 |
|
|
begin
|
| 184 |
|
|
-- if(rst='0') then
|
| 185 |
|
|
-- --state<=IDLE;
|
| 186 |
|
|
-- msg_out_int<="111";
|
| 187 |
|
|
-- init_out<='0';
|
| 188 |
|
|
-- config_mode_out<='0';
|
| 189 |
|
|
-- config_enable<='0';
|
| 190 |
|
|
-- I_OL7_JP2_53<='0';
|
| 191 |
|
|
-- elsif rising_edge(clk) then
|
| 192 |
|
|
-- state<=next_state;
|
| 193 |
|
|
case cmd is
|
| 194 |
|
|
when "00000"=>--IDLE
|
| 195 |
|
|
msg_out_int<="111";
|
| 196 |
|
|
init_out<='0';
|
| 197 |
|
|
config_mode_out<='0';
|
| 198 |
|
|
config_enable<='0';
|
| 199 |
|
|
run_enable<='0';
|
| 200 |
|
|
SRAM_ADDR<=SRAM_ADDR_CONFIG;
|
| 201 |
|
|
SRAM_WEN<=SRAM_WEN_CONFIG;
|
| 202 |
|
|
SRAM_OEN<=SRAM_OEN_CONFIG;
|
| 203 |
|
|
safe_rst<='0';
|
| 204 |
|
|
|
| 205 |
|
|
when "00001"=>--CONNECTED
|
| 206 |
|
|
msg_out_int<="000";
|
| 207 |
|
|
init_out<='0';
|
| 208 |
|
|
config_mode_out<='0';
|
| 209 |
|
|
config_enable<='0';
|
| 210 |
|
|
run_enable<='0';
|
| 211 |
|
|
SRAM_ADDR<=SRAM_ADDR_CONFIG;
|
| 212 |
|
|
SRAM_WEN<=SRAM_WEN_CONFIG;
|
| 213 |
|
|
SRAM_OEN<=SRAM_OEN_CONFIG;
|
| 214 |
|
|
safe_rst<='0';
|
| 215 |
|
|
|
| 216 |
|
|
when "00011"=>--INIT
|
| 217 |
|
|
msg_out_int<="001";
|
| 218 |
|
|
init_out<='0';
|
| 219 |
|
|
config_mode_out<='0';
|
| 220 |
|
|
config_enable<='0';
|
| 221 |
|
|
run_enable<='0';
|
| 222 |
|
|
SRAM_ADDR<=SRAM_ADDR_CONFIG;
|
| 223 |
|
|
SRAM_WEN<=SRAM_WEN_CONFIG;
|
| 224 |
|
|
SRAM_OEN<=SRAM_OEN_CONFIG;
|
| 225 |
|
|
safe_rst<='0';
|
| 226 |
|
|
|
| 227 |
|
|
when "00101"=>--CONFIG
|
| 228 |
|
|
msg_out_int<="010";
|
| 229 |
|
|
init_out<='1';
|
| 230 |
|
|
config_mode_out<='0';
|
| 231 |
|
|
config_enable<='1';
|
| 232 |
|
|
run_enable<='0';
|
| 233 |
|
|
SRAM_ADDR<=SRAM_ADDR_CONFIG;
|
| 234 |
|
|
SRAM_WEN<=SRAM_WEN_CONFIG;
|
| 235 |
|
|
SRAM_OEN<=SRAM_OEN_CONFIG;
|
| 236 |
|
|
safe_rst<='0';
|
| 237 |
|
|
|
| 238 |
|
|
when "10001"=>--SAFE_RESET,Only I/Os there is no reset for safe!!
|
| 239 |
|
|
msg_out_int<="011";
|
| 240 |
|
|
init_out<='1';
|
| 241 |
|
|
config_mode_out<='1';
|
| 242 |
|
|
config_enable<='1';
|
| 243 |
|
|
run_enable<='0';
|
| 244 |
|
|
SRAM_ADDR<=SRAM_ADDR_TEST;
|
| 245 |
|
|
SRAM_WEN<=SRAM_WEN_TEST;
|
| 246 |
|
|
SRAM_OEN<=SRAM_OEN_TEST;
|
| 247 |
|
|
safe_rst<='0';
|
| 248 |
|
|
when "01001"=>--RUNNING
|
| 249 |
|
|
msg_out_int<="011";
|
| 250 |
|
|
init_out<='1';
|
| 251 |
|
|
config_mode_out<='1';
|
| 252 |
|
|
config_enable<='1';
|
| 253 |
|
|
run_enable<='1';
|
| 254 |
|
|
SRAM_ADDR<=SRAM_ADDR_TEST;
|
| 255 |
|
|
SRAM_WEN<=SRAM_WEN_TEST;
|
| 256 |
|
|
SRAM_OEN<=SRAM_OEN_TEST;
|
| 257 |
|
|
safe_rst<='1';
|
| 258 |
|
|
|
| 259 |
|
|
when others=>
|
| 260 |
|
|
msg_out_int<= "111";
|
| 261 |
|
|
init_out<='1';
|
| 262 |
|
|
config_mode_out<='0';
|
| 263 |
|
|
config_enable<='0';
|
| 264 |
|
|
run_enable<='0';
|
| 265 |
|
|
SRAM_ADDR<=SRAM_ADDR_CONFIG;
|
| 266 |
|
|
SRAM_WEN<=SRAM_WEN_CONFIG;
|
| 267 |
|
|
SRAM_OEN<=SRAM_OEN_CONFIG;
|
| 268 |
|
|
safe_rst<='0';
|
| 269 |
|
|
end case;
|
| 270 |
|
|
-- end if;
|
| 271 |
|
|
end process;
|
| 272 |
|
|
|
| 273 |
|
|
-- p2:process(state,init_config,config_mode)
|
| 274 |
|
|
-- begin
|
| 275 |
|
|
-- case state is
|
| 276 |
|
|
--
|
| 277 |
|
|
-- when IDLE=>
|
| 278 |
|
|
-- if(init_config='0') then
|
| 279 |
|
|
-- next_state<=INIT;
|
| 280 |
|
|
-- else
|
| 281 |
|
|
-- next_state<=IDLE;
|
| 282 |
|
|
-- end if;
|
| 283 |
|
|
---- when CONNECT=>
|
| 284 |
|
|
----
|
| 285 |
|
|
---- if(init_config='0') then
|
| 286 |
|
|
---- next_state<= INIT;
|
| 287 |
|
|
---- else
|
| 288 |
|
|
---- next_state<= CONNECT;
|
| 289 |
|
|
---- end if;
|
| 290 |
|
|
--
|
| 291 |
|
|
-- when INIT=>
|
| 292 |
|
|
-- if(config_mode='1') then
|
| 293 |
|
|
-- next_state<=CONFIG;
|
| 294 |
|
|
-- else
|
| 295 |
|
|
-- next_state<=INIT;
|
| 296 |
|
|
-- end if;
|
| 297 |
|
|
--
|
| 298 |
|
|
-- when CONFIG=>
|
| 299 |
|
|
-- -- if(init_config='0') then
|
| 300 |
|
|
-- -- next_state<=INIT;
|
| 301 |
|
|
-- if(config_mode='0') then
|
| 302 |
|
|
-- next_state<=RUNNING;
|
| 303 |
|
|
-- elsif(config_mode='1') then
|
| 304 |
|
|
-- next_state<=CONFIG;
|
| 305 |
|
|
-- end if;
|
| 306 |
|
|
--
|
| 307 |
|
|
-- when RUNNING=>
|
| 308 |
|
|
-- --if(init_config='0') then
|
| 309 |
|
|
-- -- next_state<=INIT;
|
| 310 |
|
|
-- if(config_mode='1') then
|
| 311 |
|
|
-- next_state<=CONFIG;
|
| 312 |
|
|
-- elsif(config_mode='0') then
|
| 313 |
|
|
-- next_state<=RUNNING;
|
| 314 |
|
|
-- end if;
|
| 315 |
|
|
--
|
| 316 |
|
|
-- when others=>
|
| 317 |
|
|
-- next_state<=state;
|
| 318 |
|
|
-- end case;
|
| 319 |
|
|
-- end process;
|
| 320 |
|
|
|
| 321 |
|
|
-- p3:process(state)
|
| 322 |
|
|
-- begin
|
| 323 |
|
|
-- case state is
|
| 324 |
|
|
-- when IDLE=>
|
| 325 |
|
|
-- msg_out_int<="111";
|
| 326 |
|
|
-- init_out<='0';
|
| 327 |
|
|
-- config_mode_out<='0';
|
| 328 |
|
|
-- config_enable<='0';
|
| 329 |
|
|
-- I_OL7_JP2_53<='0';
|
| 330 |
|
|
--
|
| 331 |
|
|
-- when CONNECT=>
|
| 332 |
|
|
-- msg_out_int<="000";
|
| 333 |
|
|
-- init_out<='0';
|
| 334 |
|
|
-- config_mode_out<='0';
|
| 335 |
|
|
-- config_enable<='0';
|
| 336 |
|
|
-- I_OL7_JP2_53<='0';
|
| 337 |
|
|
--
|
| 338 |
|
|
-- when INIT=>
|
| 339 |
|
|
-- msg_out_int<="001";
|
| 340 |
|
|
-- init_out<='0';
|
| 341 |
|
|
-- config_mode_out<='0';
|
| 342 |
|
|
-- config_enable<='0';
|
| 343 |
|
|
-- I_OL7_JP2_53<='0';
|
| 344 |
|
|
--
|
| 345 |
|
|
-- when CONFIG=>
|
| 346 |
|
|
-- msg_out_int<="010";
|
| 347 |
|
|
-- init_out<='1';
|
| 348 |
|
|
-- config_mode_out<='0';
|
| 349 |
|
|
-- config_enable<='1';
|
| 350 |
|
|
-- I_OL7_JP2_53<='0';
|
| 351 |
|
|
--
|
| 352 |
|
|
-- when RUNNING=>
|
| 353 |
|
|
-- msg_out_int<="011";
|
| 354 |
|
|
-- init_out<='1';
|
| 355 |
|
|
-- config_mode_out<='1';
|
| 356 |
|
|
-- config_enable<='0';
|
| 357 |
|
|
-- I_OL7_JP2_53<='1';
|
| 358 |
|
|
--
|
| 359 |
|
|
-- when others=>
|
| 360 |
|
|
-- msg_out_int<= "111";
|
| 361 |
|
|
-- init_out<='1';
|
| 362 |
|
|
-- config_mode_out<='0';
|
| 363 |
|
|
-- config_enable<='0';
|
| 364 |
|
|
-- I_OL7_JP2_53<='0';
|
| 365 |
|
|
-- end case;
|
| 366 |
|
|
-- end process;
|
| 367 |
|
|
-- --Main State Machine------------------------------------
|
| 368 |
|
|
--p_trigger:process(clk,rst)
|
| 369 |
|
|
-- begin
|
| 370 |
|
|
-- if(rst='0') then
|
| 371 |
|
|
-- trig_count<=0;
|
| 372 |
|
|
-- trigger<='0';
|
| 373 |
|
|
-- elsif rising_edge(clk) then
|
| 374 |
|
|
-- trig_count<=trig_count+1;
|
| 375 |
|
|
-- if(trig_count=1024) then
|
| 376 |
|
|
-- trigger<='1';
|
| 377 |
|
|
-- elsif(trig_count=2048) then
|
| 378 |
|
|
-- trig_count<=0;
|
| 379 |
|
|
-- trigger<='0';
|
| 380 |
|
|
-- end if;
|
| 381 |
|
|
-- end if;
|
| 382 |
|
|
-- end process;
|
| 383 |
|
|
--trigger<=clk;
|
| 384 |
|
|
end architecture machine_a_etat;
|