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Changes for page Basic design

Last modified by nfl on 2025/01/30 12:05
From version 1.1
edited by nbw
on 2014/06/18 16:41
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To version 18.1
edited by sna
on 2014/08/13 03:55
Change comment: There is no comment for this version

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1 -XWiki.nbw
1 +XWiki.sna
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1 +
2 +
3 +{{toc/}}
4 +
1 1  We compose our railway controller from several train controllers, combined with controllers for mutual exclusion.
2 2  
3 3  == Mutual Exclusion ==
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4 4  
5 5  === Normal segments ===
6 6  
7 -For each block we generate one mutex controller, similar to the following pattern.
11 +**For each block** we generate one mutex controller, similar to the following pattern.
8 8  
9 9  [[image:attach:Mutex.png]]
10 10  
11 -For each controlled train one state and the corresponding transitions are added.
15 +**For each controlled train** one state and the corresponding transitions are added.
12 12  
13 -For a free track the *_perm variable is set to -1 and all tracks, apart from starting positions, are initialised with -1. For the starting positions the *_perm variables are set to the corresponding train number and the *_req variable for the train is set to true.
17 +A train **must** signal the wish to enter a segment by setting the variable **bool <segment>_req[trainNum] **to true.
18 +The right to enter a segement is given to the train by setting the variable **int <segment>_perm** to the train number.
19 +After leaving a segment the train **must** remove its request by setting <segment>_req[trainNum] to false again.
14 14  
15 -**A train must not enter a segment without holding the lock for the segment. No exceptions from this rule are allowed.**
21 +For a free track the *_perm variable is set to -1 and all tracks, apart from starting positions, are initialized with -1. For the starting positions the *_perm variables are set to the corresponding train number and the *_req variable for the train is set to true.
16 16  
23 +**A train must not enter a segment or alter the settings of a segment without holding the lock for the segment. No exceptions from this rule are allowed.**
24 +
17 17  === Kicking Horse Pass ===
18 18  
19 -To prevent collisions on the track, a special controller manages the right to enter the Kicking Horse Pass.
27 +To prevent collisions on the track, a special controller manages the rights to enter or leave the Kicking Horse Pass.
20 20  
21 21  [[image:attach:Mutex_KH.png]]
22 22  
23 -The controller splits the pass into two parts, left and right, corresponding to the track layout chart. [[(Simplified track layout)>>url:http://www.informatik.uni-kiel.de/~~railway/Downloads/kscheme.pdf||shape="rect"]]
31 +The controller splits the pass into two parts, //left// and //right//, corresponding to the track layout chart. [[(Simplified track layout)>>url:http://www.informatik.uni-kiel.de/~~railway/Downloads/kscheme.pdf||shape="rect"]]
24 24  
25 -We allow two trains in one direction
33 +Each part has two operational modes, //in// and //out//, being active when trains are allowed to either enter or leave the pass. When entering the pass the controller counts the entering trains and only lets two trains enter (one after the other). When leaving the pass the trains are removed from the counter, freeing space for the next train.
34 +
35 +== Train controller ==
36 +
37 +Each train controller is set in a separate region with a referenced state. This state has the following interface:
38 +
39 +
40 +\\\\\\\\
41 +
42 +{{{    input int *_perm;         # All permission variables (Tracks) input bool *_perm # KH permission variables   input int trainNum;    input bool cleanup; input bool debug; output bool *_req[]; # All request variables}}}
43 +
44 +The train controller is composed of several //Station-2-Station// controllers. These are combined to form a complete schedule. Additionally, the cleanup signal has to be watched to abort the schedule and return back to the initial position.
45 +
46 +=== Structure ===
47 +
48 +{{code linenumbers="true" language="sct"}}
49 +//
50 +// Structure of a train controller based on test case 2
51 +//
52 +scchart Test2 "Test of IC_JCT" {
53 +  // Set of request variables for all tracks for 11 trains
54 + bool IC_JCT_0_req[11], IC_LN_0_req[11], IC_LN_1_req[11], IC_LN_2_req[11];
55 + bool IC_LN_3_req[11], IC_LN_4_req[11], IC_LN_5_req[11], IC_ST_0_req[11];
56 + bool IC_ST_1_req[11], IC_ST_2_req[11], IC_ST_3_req[11], IC_ST_4_req[11];
57 + bool IO_LN_0_req[11], IO_LN_1_req[11], IO_LN_2_req[11], KH_LN_0_req[11];
58 + bool KH_LN_1_req[11], KH_LN_2_req[11], KH_LN_3_req[11], KH_LN_4_req[11];
59 + bool KH_LN_5_req[11], KH_LN_6_req[11], KH_LN_7_req[11], KH_LN_8_req[11];
60 + bool KH_ST_0_req[11], KH_ST_1_req[11], KH_ST_2_req[11], KH_ST_3_req[11];
61 + bool KH_ST_4_req[11], KH_ST_5_req[11], KH_ST_6_req[11], KIO_LN_0_req[11];
62 + bool KIO_LN_1_req[11], OC_JCT_0_req[11], OC_LN_0_req[11], OC_LN_1_req[11];
63 + bool OC_LN_2_req[11], OC_LN_3_req[11], OC_LN_4_req[11], OC_LN_5_req[11];
64 + bool OC_ST_0_req[11], OC_ST_1_req[11], OC_ST_2_req[11], OC_ST_3_req[11];
65 + bool OC_ST_4_req[11], OI_LN_0_req[11], OI_LN_1_req[11], OI_LN_2_req[11];
66 +
67 + // Set of permission variables for all tracks
68 +  bool req_in_R, req_out_R, req_in_L, req_out_L, perm_in_R, perm_out_R, perm_in_L, perm_out_L;
69 + int IC_JCT_0_perm, IC_LN_0_perm, IC_LN_1_perm, IC_LN_2_perm;
70 + int IC_LN_3_perm, IC_LN_4_perm, IC_LN_5_perm, IC_ST_0_perm;
71 + int IC_ST_1_perm, IC_ST_2_perm, IC_ST_3_perm, IC_ST_4_perm;
72 + int IO_LN_0_perm, IO_LN_1_perm, IO_LN_2_perm, KH_LN_0_perm;
73 + int KH_LN_1_perm, KH_LN_2_perm, KH_LN_3_perm, KH_LN_4_perm;
74 + int KH_LN_5_perm, KH_LN_6_perm, KH_LN_7_perm, KH_LN_8_perm;
75 + int KH_ST_0_perm, KH_ST_1_perm, KH_ST_2_perm, KH_ST_3_perm;
76 + int KH_ST_4_perm, KH_ST_5_perm, KH_ST_6_perm, KIO_LN_0_perm;
77 + int KIO_LN_1_perm, OC_JCT_0_perm, OC_LN_0_perm, OC_LN_1_perm;
78 + int OC_LN_2_perm, OC_LN_3_perm, OC_LN_4_perm, OC_LN_5_perm;
79 + int OC_ST_0_perm, OC_ST_1_perm, OC_ST_2_perm, OC_ST_3_perm;
80 + int OC_ST_4_perm, OI_LN_0_perm, OI_LN_1_perm, OI_LN_2_perm;
81 +
82 + // Debug flag for additional output
83 + bool debug = false;
84 + // Cleanup flag for halting the trains at home station tracks
85 +  bool cleanup = false;
86 +  // Variable, that gives the number of trains to C-Controller for stability check
87 + int trainCount;
88 +
89 + // Set of constants for binding to referenced SCCharts
90 + const int c_EINS = 1;
91 + const int c_ZWEI = 2;
92 + const int c_DREI = 3;
93 + const int c_VIER = 4;
94 + const int c_FUENF = 5;
95 +
96 + // State initializing the trains on corresponding tracks
97 + initial state init references initRailway11Trains
98 + --> run;
99 +
100 + // State handling the train schedules
101 + state run {
102 + // Regions handling the mutual exclusion on the track segments
103 + region Mutexes:
104 +  // State referenced to the MutexController for 11 Trains
105 + initial state Mutexes references mutexRailway11Trains;
106 +
107 + region KH_Mutexes:
108 +  // State referenced to additional MutexController for KH
109 + initial state KH_Mutexes references kh_mutex;
110 +
111 + // Regions that contain the schedules for individual trains
112 + //--------------------------------------------------------------------------------------
113 +
114 + // Region with schedule for train 4
115 + region Train4 :
116 +  // State with the schedule for train 4
117 + initial state train4 {
118 +
119 + // Annotation for replacing following constant in the hostcode of referenced SCChart
120 + @alterHostcode
121 + // Number of the train for identifying on track segments
122 + const int trainNum = 4;
123 +  // Variable specifying the track, where the train arrives at,
124 + // and for transmitting the track number to next Station-2-Station controller
125 + int arrivalTrack = 3;
126 +
127 + // Schedule of train 4: train drives only in the IC, should use station track 3
128 + // State Round referenced to ICIC Station-2-Station controller
129 + initial state Round references ICIC
130 + bind depTrack to arrivalTrack,
131 + destTrack to c_DREI,
132 + arrTrack to arrivalTrack
133 +  // Transition to checking state
134 + >-> Choice;
135 +
136 + // State for checking, when the train should halt and if the train is on corresponding track
137 + state Choice
138 + // Transition for driving additional circle, if cleanup = false or wrong track used
139 + --> Round with !cleanup | !(arrivalTrack == 3)
140 + // Transition to final state
141 + --> Done;
142 +
143 + final state Done;
144 + };
145 +
146 +
147 + // Region with schedule for train 5, identical to region above
148 +  region Train5 :
149 + initial state train5 {
150 +
151 + @alterHostcode
152 + const int trainNum = 5;
153 + int arrivalTrack = 2;
154 +
155 + initial state Round references ICIC
156 + bind depTrack to arrivalTrack,
157 + destTrack to c_ZWEI,
158 + arrTrack to arrivalTrack
159 + >-> Choice;
160 +
161 + state Choice
162 + --> Round with !cleanup | !(arrivalTrack == 2)
163 + --> Done;
164 +
165 + final state Done;
166 +
167 + };
168 +
169 +
170 + // Region with schedule for train 9, identical to region above
171 + region Train9 :
172 + initial state train9 {
173 +
174 + @alterHostcode
175 + const int trainNum = 9;
176 + int arrivalTrack = 1;
177 +
178 + initial state Round references ICIC
179 + bind depTrack to arrivalTrack,
180 + destTrack to c_EINS,
181 + arrTrack to arrivalTrack
182 + >-> Choice;
183 +
184 + state Choice
185 + --> Round with !cleanup | !(arrivalTrack == 1)
186 + --> Done;
187 +
188 + final state Done;
189 + };
190 +
191 +
192 + // Region with schedule for train 7
193 + region Train7 :
194 + initial state train7 {
195 +
196 + @alterHostcode
197 + const int trainNum = 7;
198 + int arrivalTrack = 1;
199 +
200 + // Schedule of train 7: train drives from OC-Station track 1 to IC-Station track 2 and back
201 + // arrivalTrack used for transmitting the number of station track where train arrived on
202 + // to next controller where the train starts on
203 + initial state OCtoIC references OCIC
204 + bind depTrack to arrivalTrack,
205 + destTrack to c_ZWEI,
206 + arrTrack to arrivalTrack
207 +  // Transition to next Station-2-Station controller
208 + >-> ICtoOC;
209 +
210 + state ICtoOC references ICOC
211 + bind depTrack to arrivalTrack,
212 + destTrack to c_EINS,
213 + arrTrack to arrivalTrack
214 +  // Transition to checking state because train at home station
215 + >-> Choice;
216 +
217 + // State for checking, when the train should halt and if the train is on corresponding track
218 + state Choice
219 + // Transition for driving additional circle, if cleanup = false or wrong track used
220 +  --> OCtoIC with !cleanup | !(arrivalTrack == 1)
221 + // Transition to final state
222 + --> Done;
223 +
224 + final state Done;
225 + };
226 + };
227 +}
228 +{{/code}}
229 +
230 +
231 +
232 +== Station-2-Station controller ==
233 +
234 +Each Station-2-Station controller realizes the movement from one of the stations (IC,OC,KH) to another station. All controllers using IC or OC parts have to respect the traveling directions. For the Kicking Horse Pass two separate controllers, forwards and backwards, are used.
235 +
236 +The controllers starting from Kicking Horse Pass Station make an assumption of the direction of the train. These are dependent on the directions of the inner or outer circle, e.g. the KHIC controller starts backwards because this is the only valid direction to travel this path. To drive a train from the Kicking Horse Station (facing forward) to the Inner Circle we have to combine the KHOC and OCIC controllers.
237 +
238 +[[image:attach:ICIC.png]]
239 +
240 +When arriving on a station the train controller **must** first call the function //void railArrival(int train, int station)//. This starts the waiting timer for the train.
241 +Next the train **must** wait for// int railDeparture(int train)// to return 1.
242 +After the waiting has finished the controller can reach a final state and pass the control back to the train controller.
243 +
244 +=== Structure  ===
245 +
246 +{{code linenumbers="true" language="sct"}}
247 +//
248 +// Structure of a Station-2-Station controller from Station * to Station *
249 +//
250 +scchart STST " * to * Controller " {
251 +
252 + // Set of permission variables for required tracks
253 + input int *_perm;
254 +
255 + // Set of request variables for required tracks for 11 trains
256 + output bool *_req[11];
257 +
258 + // Train number
259 + input int trainNum;
260 +
261 + // Number of the departure track in a station
262 + input int depTrack;
263 +
264 + // Number of the destination track in a station
265 + input int destTrack;
266 +
267 + // Cleanup flag for selecting the destination track
268 + input bool cleanup;
269 +
270 + // Debug flag for additional output
271 + input bool debug;
272 +
273 + // Arrival track
274 + output int arrTrack;
275 +
276 + // Variable with value for arrTrack for selecting correct station elements
277 + int i_arrOnTrack;
278 +
279 + // Handles departing from a station *
280 + initial state *_ST {
281 + // hostcode call for additional output when debug
282 + entry debug / 'println([trainNum][ST-ST] ... )';
283 +
284 + // State, which sets requests for needed tracks
285 + initial state waitForPerm {
286 + entry / *_ST_4_req[trainNum] = true;
287 + entry / *_LN_0_req[trainNum] = true;
288 + }
289 + // Transition is taken, if all permissions are received
290 + --> gotPerm with (*_ST_4_perm == trainNum) & (*_LN_0_perm == trainNum)
291 + // Transition is taken, if some (not all) permissions are received
292 + --> backOff with (*_ST_4_perm == trainNum) | (*_LN_0_perm == trainNum);
293 +
294 + // State for waiting an additional tick when not all permissions are received
295 + state backOff
296 + --> backOff1;
297 +
298 + // State, which releases the requests for needed tracks
299 + state backOff1 {
300 + entry / *_ST_4_req[trainNum] = false;
301 + entry / *_LN_0_req[trainNum] = false;
302 + }
303 + // Transition to repeat requesting permissions procedure
304 + --> waitForPerm;
305 +
306 + final state gotPerm;
307 + }
308 + // Transition to the departure state
309 + >-> Dep_*_ST;
310 +
311 + // State, which handles the departure of a train
312 + state Dep_*_ST {
313 + // Set of entry-Actions with hostcode calls to set tracks, points and signals according to depTrack
314 + entry / 'railPoint(*,STRAIGHT)';
315 + entry / 'railSignal(*_LN_0, FWD, RED)';
316 + entry / 'railTrack(*_LN_0,FWD,trainNum,NORMAL)';
317 + entry / 'railTrack(*_ST_4,FWD,trainNum,NORMAL)';
318 + entry depTrack == 1 / 'railSignal(*_ST_1, FWD, GREEN)';
319 + entry depTrack == 2 / 'railSignal(*_ST_2, FWD, GREEN)';
320 + entry depTrack == 3 / 'railSignal(*_ST_3, FWD, GREEN)';
321 + //...
322 + // Transition to next track segment, if contact is triggered
323 + } --> *_LN_0 with 'railContact(*_LN_0,0)';
324 +
325 +
326 +
327 + // ----------------------------------------------------------------------------------------------------------------
328 + // Set of track segment controlling states such as follows
329 + // ----------------------------------------------------------------------------------------------------------------
330 +
331 + // Transition to next track segment, if contact is triggered
332 + state *_LN_0 {
333 + // Hostcode calls for outputs
334 + entry / 'println("[trainNum][ST-ST] Entering *_LN_0")';
335 + entry debug / 'println("[trainNum][ST-ST] Requesting permission for *_LN_1")';
336 + // Entry-Actions with hostcode calls to set previous signal according to depTrack to RED
337 + entry depTrack == 1 / 'railSignal(*_ST_1, FWD, RED)';
338 + entry depTrack == 2 / 'railSignal(*_ST_2, FWD, RED)';
339 + entry depTrack == 3 / 'railSignal(*_ST_3, FWD, RED)';
340 + // Requesting the next track segment
341 + entry / *_LN_1_req[trainNum] = true;
342 +
343 + // Region for handling train driving
344 + region Travel:
345 + initial state Entry
346 + // Transition to continuing state, if permitted
347 + --> Continue with 'railContact(*_LN_0,0)' & (*_LN_1_perm == trainNum)
348 + // Transition to slowing down else
349 + --> Slowdown with 'railContact(*_LN_0,0)';
350 +
351 + // State for slowing down the train
352 + state Slowdown {
353 + entry debug / 'println("[trainNum][ST-ST] Slowing down on *_LN_0")';
354 + // Entry-Action with hostcode calls for slowing down the train
355 + entry / 'railTrack(*_LN_0,FWD,trainNum,CAUTION)';
356 + }
357 + // Transition to waiting state
358 + --> Waiting with 'railContact(*_LN_0,1)'
359 + // Transition to continuing state, if permitted
360 + --> Continue with *_LN_1_perm == trainNum;
361 +
362 + // State for train waiting on permission
363 + state Waiting {
364 + entry debug / 'println("[trainNum][ST-ST] Stopping on *_LN_0")';
365 + // Entry-Action with hostcode call for stopping the train
366 + entry / 'railTrackBrake(*_LN_0)';
367 + }
368 + --> Continue with *_LN_1_perm == trainNum;
369 +
370 + // State to continuing driving on the track
371 + final state Continue {
372 + entry debug / 'println("[trainNum][ST-ST] Continuing on *_LN_0")';
373 + // Entry-Actions with hostcode calls to set tracks and signals for driving
374 + entry / 'railSignal(*_LN_0,FWD,GREEN)';
375 + entry / 'railTrack(*_LN_0,FWD,trainNum,NORMAL)';
376 + entry / 'railTrack(*_LN_1,FWD,trainNum,NORMAL)';
377 + entry / 'railSignal(*_LN_1, FWD, RED)';
378 + };
379 +
380 + // Region for handling cleanup functionalities
381 + region Cleanup:
382 + initial state Entry
383 + // Transition to cleanup state
384 + --> cleanup with 'railContact(*_LN_0,0)';
385 +
386 + // State for cleaning up the previous track segments
387 + final state cleanup {
388 + entry debug / 'println("[trainNum][ST-ST] Entered *_LN_0 completely")';
389 + // Entry-Action with hostcode call to switching off the previous track
390 + entry / 'railTrackOff(*_ST_4)';
391 + // Entry-Action to release the previous track
392 + entry / *_ST_4_req[trainNum] = false;
393 + };
394 + // Transition to transitional state
395 + }>-> *_LN_0_*_LN_1;
396 +
397 + state *_LN_0_*_LN_1
398 + // Transition to next track segment, if contact is triggered
399 + --> *_LN_1 with 'railContact(*_LN_1,0)';
400 +
401 + // ----------------------------------------------------------------------------------------------------------------
402 +
403 +
404 +
405 + // State for entering a station
406 + state *_LN_5 {
407 + // Variable for checking all needed permissions
408 + int perm_all_next_segments = false;
409 + entry / 'println("[trainNum][ST-ST] Entering *_LN_5")';
410 + entry / 'railSignal(*_LN_4, FWD, RED)';
411 +
412 + // Region for handling train driving such as above,
413 + // only with perm_all_next_segments for permitting more than one track
414 + region Travel:
415 + initial state Entry
416 + --> Continue with 'railContact(*_LN_5,0)' & perm_all_next_segments
417 + --> Slowdown with 'railContact(*_LN_5,0)';
418 +
419 + state Slowdown {
420 + entry debug / 'println("[trainNum][ST-ST] Slowing down on *_LN_5")';
421 + entry / 'railTrack(*_LN_5,FWD,trainNum,CAUTION)';
422 + }
423 + --> Waiting with 'railContact(*_LN_5,1)'
424 + --> Continue with perm_all_next_segments;
425 +
426 + state Waiting {
427 + entry debug / 'println("[trainNum][ST-ST] Stopping on *_LN_5")';
428 + entry / 'railTrackBrake(*_LN_5)';
429 + }
430 + --> Continue with perm_all_next_segments;
431 +
432 + final state Continue {
433 + entry debug / 'println("[trainNum][ST-ST] Continuing on *_LN_5")';
434 + entry i_arrOnTrack == 1 / 'railTrack(*_ST_1,FWD,trainNum,NORMAL)';
435 + entry i_arrOnTrack == 2 / 'railTrack(*_ST_2,FWD,trainNum,NORMAL)';
436 + entry i_arrOnTrack == 3 / 'railTrack(*_ST_3,FWD,trainNum,NORMAL)';
437 + //...
438 + entry / arrTrack = i_arrOnTrack;
439 + };
440 +
441 + // Region for handling cleanup-functionalities such as above
442 + region Cleanup:
443 + initial state Entry
444 + --> cleanup with 'railContact(*_LN_5,0)';
445 +
446 + final state cleanup {
447 + entry debug / 'println("[trainNum][ST-ST] Entered *_LN_5 completely")';
448 + entry / 'railTrackOff(*_LN_4)';
449 + entry / *_LN_4_req[trainNum] = false;
450 + };
451 +
452 + // Region for handling permissions of all needed tracks
453 + region Permissions:
454 + // State for requesting all needed tracks according to destination track and cleanup-Flag
455 + initial state checking {
456 + entry / *_ST_0_req[trainNum] = true;
457 + entry destTrack == 1 | !cleanup / *_ST_1_req[trainNum] = true;
458 + entry destTrack == 2 | !cleanup / *_ST_2_req[trainNum] = true;
459 + entry destTrack == 3 | !cleanup / *_ST_3_req[trainNum] = true;
460 + }
461 + // Transitions for permitted tracks match wished tracks
462 + --> success with destTrack == 1 & *_ST_0_perm == trainNum & *_ST_1_perm == trainNum / i_arrOnTrack = 1
463 + --> success with destTrack == 2 & *_ST_0_perm == trainNum & *_ST_2_perm == trainNum / i_arrOnTrack = 2
464 + --> success with destTrack == 3 & *_ST_0_perm == trainNum & *_ST_3_perm == trainNum / i_arrOnTrack = 3
465 + // Transitions for permitted tracks don't match wished tracks
466 + --> success with *_ST_0_perm == trainNum & *_ST_1_perm == trainNum / i_arrOnTrack = 1
467 + --> success with *_ST_0_perm == trainNum & *_ST_2_perm == trainNum / i_arrOnTrack = 2
468 + --> success with *_ST_0_perm == trainNum & *_ST_3_perm == trainNum / i_arrOnTrack = 3
469 + // Transition for not all tracks permitted
470 + --> resolving with *_ST_0_perm == trainNum | *_ST_3_perm == trainNum | *_ST_2_perm == trainNum | *_ST_1_perm == trainNum;
471 +
472 + // State for waiting an additional tick
473 + state resolving
474 + --> resolving1;
475 +
476 + // State for releasing track requests
477 + state resolving1 {
478 + entry / *_ST_0_req[trainNum] = false;
479 + entry / *_ST_1_req[trainNum] = false;
480 + entry / *_ST_2_req[trainNum] = false;
481 + entry / *_ST_3_req[trainNum] = false;
482 + }
483 + // Transition for trying the requesting again
484 + --> checking;
485 +
486 + // State for waiting an additional tick
487 + state success
488 + --> success1;
489 +
490 + // State for releasing not used track requests
491 + final state success1 {
492 + entry !(i_arrOnTrack == 1) / *_ST_1_req[trainNum] = false;
493 + entry !(i_arrOnTrack == 2) / *_ST_2_req[trainNum] = false;
494 + entry !(i_arrOnTrack == 3) / *_ST_3_req[trainNum] = false;
495 + // Settting perm_all_next_segments to true
496 + entry / perm_all_next_segments = true;
497 + };
498 + // Transition to station entry states
499 + }>-> *_LN_5_*_ST;
500 +
501 + // State waiting for station entry
502 + state *_LN_5_*_ST
503 + --> Arr_*_ST with i_arrOnTrack == 1 & 'railContact(*_ST_1,0)'
504 +  --> Arr_*_ST with i_arrOnTrack == 2 & 'railContact(*_ST_2,0)'
505 + --> Arr_*_ST with i_arrOnTrack == 3 & 'railContact(*_ST_3,0)';
506 +
507 + // State for setting tracks, points and signals according to i_arrOnTrack
508 + // and releasing previous track request
509 + state Arr_*_ST {
510 + entry / 'railSignal(*_LN_5, FWD, RED)';
511 + entry / 'railTrackOff(*_LN_5)';
512 + entry / 'railTrack(*_ST_0,FWD,trainNum,SLOW)';
513 + entry i_arrOnTrack == 1 / 'railTrack(*_ST_1,FWD,trainNum,SLOW)';
514 + entry i_arrOnTrack == 2 / 'railTrack(*_ST_2,FWD,trainNum,SLOW)';
515 + entry i_arrOnTrack == 3 / 'railTrack(*_ST_3,FWD,trainNum,SLOW)';
516 + entry / *_LN_5_req[trainNum] = false;
517 +
518 + initial state SlowEntry
519 + --> Slow with i_arrOnTrack == 1 & 'railContact(*_ST_1,0)'
520 + --> Slow with i_arrOnTrack == 2 & 'railContact(*_ST_2,0)'
521 + --> Slow with i_arrOnTrack == 3 & 'railContact(*_ST_3,0)';
522 +
523 + // State for switching off previous track and releasing the request
524 + state Slow {
525 + entry / 'railTrackOff(*_ST_0)';
526 + entry / *_ST_0_req[trainNum] = false;
527 + }
528 + // Transitions to halt state, when train is at second contact of a track segment
529 + --> Halt with i_arrOnTrack == 1 & 'railContact(*_ST_1,1)'
530 + --> Halt with i_arrOnTrack == 2 & 'railContact(*_ST_2,1)'
531 + --> Halt with i_arrOnTrack == 3 & 'railContact(*_ST_3,1)';
532 +
533 +
534 + final state Halt {
535 + // Entry-Actions for braking the train on correct track
536 + entry i_arrOnTrack == 1 / 'railTrackBrake(*_ST_1)';
537 + entry i_arrOnTrack == 2 / 'railTrackBrake(*_ST_2)';
538 + entry i_arrOnTrack == 3 / 'railTrackBrake(*_ST_3)';
539 + // Entry-Actions for waiting for timer on correct track
540 + entry i_arrOnTrack == 1 / 'railArrival(trainNum, *_ST_1)';
541 + entry i_arrOnTrack == 2 / 'railArrival(trainNum, *_ST_2)';
542 + entry i_arrOnTrack == 3 / 'railArrival(trainNum, *_ST_3)';
543 + };
544 + }
545 + >-> done;
546 +
547 + state done
548 + // Transition to final state, if timer is ready
549 + --> reallyDone with 'railDeparture(trainNum)';
550 +
551 + final state reallyDone;
552 +}
553 +{{/code}}
Confluence.Code.ConfluencePageClass[0]
Id
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1 -9471007
1 +9471746
URL
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1 -https://rtsys.informatik.uni-kiel.de/confluence//wiki/spaces/SS14Railway/pages/9471007/Basic design
1 +https://rtsys.informatik.uni-kiel.de/confluence//wiki/spaces/SS14Railway/pages/9471746/Basic design