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Wiki source code of PLDI'14 Artifact on SCCharts

Version 33.1 by cmot on 2014/03/13 13:54
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cmot 7.1 1 [[image:attach:title7.png]]
2
3 = Modeling SCCharts with KIELER =
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Reinhard von Hanxleden 28.1 5 This tutorial should guide you if you like to model SCCharts with KIELER and use the circuit based software synthesis path as explained in our [1] [[PLDI'14 submission>>url:http://rtsys.informatik.uni-kiel.de/%7Ebiblio/downloads/papers/pldi14-submitted.pdf||shape="rect"]]. We will show you how to
cmot 7.1 6
cmot 9.1 7 ~1. Download & Start KIELER,
cmot 7.1 8
9 2. Model an SCChart, and
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11 3. Generate C Code.
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cmot 30.1 13 We will use a simple example here in order to illustrate the process. Please refer to the SCCharts superpage for the [[project status>>doc:SCCharts]] and [[known limitations>>doc:SCCharts]]. If you are interested in the source code you can find instruction how to download and compile it here: [[Getting Started>>url:http://rtsys.informatik.uni-kiel.de/confluence/display/KIELER/Getting+Started||shape="rect"]].
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cmot 33.1 15 See a list of the evaluated examples at the end.
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cmot 8.1 17
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Reinhard von Hanxleden 28.1 19 [1] PLDI submission: [[http:~~/~~/rtsys.informatik.uni-kiel.de/~~~~biblio/downloads/papers/pldi14-submitted.pdf>>url:http://rtsys.informatik.uni-kiel.de/%7Ebiblio/downloads/papers/pldi14-submitted.pdf||shape="rect"]]
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cmot 24.1 21
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cmot 25.1 23 In addition to the step-by-step tutorial below we also captured a [[video >>url:http://rtsys.informatik.uni-kiel.de/~~kieler/files/pldi14/sccharts.swf||shape="rect"]]that shows each of the explained steps:
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cmot 25.1 25 [[~[~[image:attach:RTEmagicC_demo.png.png~]~]>>url:http://rtsys.informatik.uni-kiel.de/~~kieler/files/pldi14/sccharts.swf||shape="rect"]]
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cmot 25.1 27 Download location: [[http:~~/~~/rtsys.informatik.uni-kiel.de/~~~~kieler/files/pldi14/sccharts.swf>>url:http://rtsys.informatik.uni-kiel.de/~~kieler/files/pldi14/sccharts.swf||shape="rect"]]
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cmot 24.1 29 = 1. Download & Start KIELER =
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cmot 9.1 31 [[Download>>url:http://rtsys.informatik.uni-kiel.de/~~kieler/files/pldi14/||shape="rect"]] a suitable KIELER version for your operation system. The zip bundles are fully compiled and ready-to-run, they do not need any further installation process. Just save and extract them to/at the location of your choice and start the KIELER executable.
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cmot 8.1 33 [[~[~[image:attach:RTEmagicC_download.png.png~]~]>>url:http://rtsys.informatik.uni-kiel.de/~~kieler/files/pldi14/||shape="rect"]]
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cmot 25.1 35 Download location: [[http:~~/~~/rtsys.informatik.uni-kiel.de/~~~~kieler/files/pldi14/>>url:http://rtsys.informatik.uni-kiel.de/~~kieler/files/pldi14/||shape="rect"]]
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cmot 9.1 37 When you start the KIELER executable, you probably need to set a (new) workspace location of your choice. (Click on the images to enlarge them).
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39 [[image:attach:kieler1.png]]
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41 If you selected a new workspace location, you will see a welcome screen like this:
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43 [[image:attach:kieler02.png]]
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45 Dismiss this "Welcome" tab. After that you'll be all set and KIELER should look like this:
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47 [[image:attach:kieler03.png]]
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cmot 10.1 49 In order to prepare modeling, we must create a project. Right-click in the Project Explorer to do so.
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51 [[image:attach:kieler04.png]]
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53 Select a General Project and click on next, then enter a project name, e.g. pldi14 and click on finish:
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55 [[image:attach:kieler05.png]][[image:attach:kieler06.png]]
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57 Now KIELER should look like this:
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59 [[image:attach:kieler07.png]]
60
61 Now you can proceed in modeling an SCChart as explained below.
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cmot 24.1 63 = 2. Model an SCChart =
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cmot 11.1 65 Right-click on a project and create a (text) File:
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cmot 11.1 67 [[image:attach:kieler08.png]]
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69 Name it abo.sct:
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71 [[image:attach:kieler09.png]]
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cmot 23.1 73 SCT is a textual description language for SCCharts. Due to space limitations SCT is not documented in the PLDI paper, but examples can be found [[here>>doc:SCT - Textual Description Language for SCCharts]]. Also the code completion functionality of the textual editor for SCT is very helpful. It can be invoked by pressing <Ctrl> + <Space>. It will list all syntactically possible input according to the SCT/SCCharts meta model.
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cmot 12.1 75 The textual SCCharts Xtext based editor (for *.sct files) will automatically be opened:
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77 [[image:attach:kieler10.png]]
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79 Now start modeling an SCChart. For example copy & paste the following sct code of abo, the hello world of SCCharts:
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81 {{code title="abo.sct"}}
cmot 13.1 82 @VHLayout
cmot 12.1 83 scchart ABO {
84 input output bool A;
85 input output bool B;
86 output bool O1;
87 output bool O2;
88 region:
89
90 initial state Init
91 --> WaitAB immediate with / O1 = false; O2 = false;
92 state WaitAB {
93 region HandleA:
94 initial state WaitA
95 --> DoneA immediate with A / B = true; O1 = true;
96 final state DoneA;
97 region HandleB:
98 initial state WaitB
99 --> DoneB with B / O1 = true;
100 final state DoneB;
101 }
102 >-> GotAB with / O1 = false; O2 = true;
103 state GotAB;
104 }
105 {{/code}}
106
cmot 13.1 107 As you save (Ctrl+S), KIELER will automatically draw the graphical SCChart diagram in a new KLigD view:
108
109 [[image:attach:kieler11.png]]
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111 You may want to re-arrange views. Just drag the KLighD view to the right side:
112
113 [[image:attach:kieler12.png]]
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cmot 14.1 115 You will now see how to generate a C tick function.
cmot 12.1 116
cmot 24.1 117 = 3. Generate C Code =
cmot 7.1 118
cmot 14.1 119 You can do several transformations on SCCharts (*.sct files). Just right click the file you want to transform in the project explorer and select the Transform SCChart sub menu. As abo is already a Core SCCart you do not need the core transformations. Click the All Normalize Transformations, this will do the Split Trigger and Effects and the Surface and Depth transformations together (in this order).
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121 [[image:attach:kieler13.png]]
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123 After performing a transformation the transformed SCChart will open (together with it's KLighD diagram visualization):
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125 [[image:attach:kieler14.png]]
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cmot 18.1 127 Now generate the Sequentially Constructive Graph (SCG) from the normalized form. You do this also in the context menu of the Project Explorer by selecting the *.normalized.sct and choosing Generate SCG. When selecting the abo.normalized.scg file the SCG diagram will be automatically synthesized (you may also want to re-arrange the KLigD view by dragging in to the right side again).
cmot 15.1 128
cmot 18.1 129 [[image:attach:kieler15.png]][[image:attach:kieler16.png]]
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cmot 18.1 133 You can now populate the SCG automatically with dependency data. Choose Transform SCG -> SCG with Dependency Data from the context menu (left side). This will result in the following SCG (right side).
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cmot 18.1 135 [[image:attach:kieler17.png]][[image:attach:kieler18.png]]
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cmot 18.1 139 Now populate the SCG with basic block information (left side). The SCG with calculated basic blocks will look like this (right side).
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cmot 18.1 141 [[image:attach:kieler19.png]][[image:attach:kieler20.png]]
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cmot 18.1 145 The next step in compilation is the (more fine grained) calculate of scheduling blocks (left side). The populated SCG with scheduling information looks like this (right side).
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cmot 18.1 147 [[image:attach:kieler21.png]][[image:attach:kieler22.png]]
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cmot 18.1 151 The SCG is now ready to be sequentialized. A primitive scheduler currently is included in KIELER but more elaborate ones are already in the pipe line (left side). The sequentialized SCG looks like this (right side).
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cmot 18.1 153 [[image:attach:kieler23.png]][[image:attach:kieler24.png]]
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cmot 18.1 157 From here its only a short hop to C code. Transform the sequentialized SCG into an S Tick Function (left side). When opening the S file (abo.normalized.seq.s) this already is very c like code (right side).
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cmot 18.1 159 [[image:attach:kieler25.png]][[image:attach:kieler26.png]]
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cmot 18.1 161
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cmot 17.1 163 Selecting Generate SC will produce a C file:
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165 [[image:attach:kieler27.png]][[image:attach:kieler28.png]]
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cmot 15.1 167
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cmot 31.1 169 = 4. Evaluated Examples =
cmot 16.1 170
cmot 31.1 171 In the following, you find the examples used for evaluation. Be advised that there currently is no tool integrated evaluation possible. Please refer to the SCCharts superpage for the [[project status>>doc:SCCharts]] and [[known limitations>>doc:SCCharts]].
172
173 |=(((
174 Example
175 )))|=(((
cmot 16.1 176
cmot 31.1 177 )))|=(((
178 SCChart  (Graphical)
179 )))|=(% colspan="1" %)(% colspan="1" %)
180 (((
181 SCChart (Textual SCT)
182 )))
183 |(% colspan="1" %)(% colspan="1" %)
184 (((
cmot 32.1 185 = shifter3 =
cmot 31.1 186 )))|(% colspan="1" %)(% colspan="1" %)
187 (((
188
189 )))|(% colspan="1" %)(% colspan="1" %)
190 (((
cmot 32.1 191 [[image:attach:shifter3.png]]
cmot 31.1 192 )))|(% colspan="1" %)(% colspan="1" %)
193 (((
cmot 32.1 194 {{code title="shifter3.sct"}}
cmot 31.1 195 scchart shifter3 {
196 input signal int I = 1;
197 signal int S0;
198 signal int S1;
199 output signal int O;
200 region R1:
201 initial state I2
202 --> I2 with pre(S0) / S1(pre(val(S0)));
203 region R0:
204 initial state I1
205 --> I1 with pre(I) / S0(pre(val(I)));
206 region R2:
207 initial state I3
208 --> I3 with pre(S1) / O(pre(val(S1)));
209 }
210 {{/code}}
211 )))
212 |(((
cmot 32.1 213 = reincarnation =
cmot 31.1 214 )))|(((
215
216 )))|(((
cmot 32.1 217 [[image:attach:reincarnation.png]]
cmot 31.1 218 )))|(% colspan="1" %)(% colspan="1" %)
219 (((
cmot 32.1 220 {{code title="reincarnation.sct"}}
cmot 31.1 221 scchart reincarnation {
222 input signal A;
223 output signal gotS;
224 region R0:
225 initial state Reincarnation {
226 signal S;
227 region R0:
228 initial state I
229 --> C1 immediate;
230 state p;
231 final state r;
232 state q
233 --> r with A / S;
234 state C1
235 --> p immediate with S / gotS
236 --> q immediate;
237 }
238 >-> Reincarnation;
239 }
240 {{/code}}
241 )))
242 |(((
cmot 32.1 243 = cabin =
cmot 31.1 244 )))|(((
245
246 )))|(((
cmot 32.1 247 [[image:attach:cabin.png]]
cmot 31.1 248 )))|(% colspan="1" %)(% colspan="1" %)
249 (((
cmot 32.1 250 {{code title="cabin.sct"}}
cmot 31.1 251 scchart Cabin {
252 input signal Stop;
253 input signal CabinStopped;
254 input signal DoorIsOpen;
255 input signal DoorOpen;
256 input signal DoorSensor;
257 input signal DoorIsClosed;
258 input signal DoorClose;
259 input signal TimerExpired;
260 output signal StartOK;
261 output signal OpenDoorMotorOff;
262 output signal OpenDoorMotorOn;
263 output signal StartTimer;
264 output signal CloseDoorMotorOn;
265 output signal CloseDoorMotorOff;
266 region R0:
267 initial state I
268 --> Open immediate with / OpenDoorMotorOn;
269 state Open
270 --> S0 with DoorIsOpen / OpenDoorMotorOff;
271 state S0 {
272 region R0:
273 initial state Initial
274 --> S0 immediate with / StartTimer;
275 state S0
276 --> S1 with TimerExpired | DoorClose / CloseDoorMotorOn;
277 state S1
278 --> S2 with DoorIsClosed / StartOK;
279 final state S2;
280 }
281 o-> I with DoorOpen | DoorSensor / CloseDoorMotorOff
282 >-> S1 with / CloseDoorMotorOff;
283 state S1
284 --> S2 with Stop;
285 state S2
286 --> I with CabinStopped;
287 }
288 {{/code}}
289 )))
290 |(((
cmot 32.1 291 = reactor control =
cmot 31.1 292 )))|(((
293
294 )))|(((
cmot 32.1 295 [[image:attach:reactor-control.png]]
cmot 31.1 296 )))|(% colspan="1" %)(% colspan="1" %)
297 (((
cmot 32.1 298 {{code title="reactor-control.sct"}}
cmot 31.1 299 scchart Module_ReactorControl {
300 output signal PullOutRods;
301 output signal PushInRods;
302 input signal Start;
303 input signal OverHeated;
304 input signal CooledDown;
305 signal unsafe;
306 region main:
307 initial state init0 "I"
308 --> ParallelStatementList40state immediate;
309 state ParallelStatementList40state {
310 region R0:
311 initial state init1 "I"
312 --> Await43state immediate;
313 state Await43state {
314 region R0:
315 initial state init2 "I"
316 --> S18 immediate;
317 state S18 "18"
318 --> S23 with Start / PullOutRods;
319 state S23 "23";
320 }
321 o-> Await43state with unsafe;
322 region R1:
323 initial state init3 "I"
324 --> S94 immediate;
325 state S94 "94"
326 --> S134 immediate with unsafe / PushInRods;
327 state S134 "134"
328 --> S94 with !unsafe;
329 region R2:
330 initial state init4 "I"
331 --> S193 immediate;
332 state S193 "193"
333 --> Sustain68state immediate with OverHeated;
334 state Sustain68state {
335 region R0:
336 initial state init5 "I"
337 --> S227 immediate with / unsafe;
338 state S227 "227"
339 --> S227 with / unsafe;
340 }
341 o-> S193 with CooledDown;
342 };
343 }
344 {{/code}}
345 )))