MATLAB EMBEDDED IDE LINK 4 - FOR USE WITH TEXAS INSTRUMENTS CODE COMPOSER STUDIO Guida Utente Pagina 125
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Schedulers and Timing
Three Odd-Rate Tasks with Preemption and Sub-Rate 1 Task
Overruns
In this three task scenario, the B as e-R ate preempts Sub-Rate 1 w hich is
overrunning.
• The overrunning subrate causes Sub-Rate 1 to execute every 4ms instead
of 2ms.
• Every other fourth execution of Sub-Rate 2 does not occur.
• Instead of executing at t=0, 3, 6, 9, 12, 15, 18,…, Sub-Rate 2 executes at
t=0, 3, 9, 12, 15, 21, and so on.
• The t=6 and t=18 instances do not occur.
3-35
- Embedded IDE Link™ 1
- User’s Guide 1
- 508-647-7000 (Phone) 2
- 508-647-7001 (Fax) 2
- The MathWorks, Inc 2
- 3 Apple Hill Drive 2
- Natick, MA 01760-2098 2
- Revision History 3
- Project Generator 6
- Exporting 8
- Functions — Alphabetical List 9
- Blocks — Alphabetical List 10
- Parameters 10
- Supported Hardware 11
- Reported Limitations and Tips 11
- Contents 12
- Getting Started 13
- Product Overview 14
- Automation Interface 15
- 1 Getting Started 16
- Verification 17
- Configuration Information 18
- Configuration I nformation 21
- 2 Automation Interface 24
- 1 Select your processor 25
- Selecting Your Processor 29
- 2 Automa tion Interface 38
- Getting Started with RTDX 43
- Functions From the RTDX Class 45
- Getting Star ted with RTDX™ 47
- Creating the ticcs Objects 49
- Constructing ticcs Objects 68
- Constructing ticc s Objects 69
- To Add a Ty 83
- MATLAB Types in 87
- Struct, Enum, Union Types 87
- Introducing Project Generator 92
- 3 Project Generator 100
- About the CCSLinkLib Blockset 101
- Schedulers and Timing 102
- Timer setup 107
- Using Asynchronous Scheduling 109
- Sub-Rate1 Tasks Overrun 123
- Overruns 125
- Project Generator Tutorial 129
- Build Process 143
- Custom Storage 143
- Report Opt 143
- Optimization Pane Parameters 145
- Embedded IDE Lin 147
- Project Options 149
- Diagnostic Option 153
- When You Generate Code 157
- Interface 163
- C89/C90 ANSI 163
- C89/C90 ANSI library 163
- C89/C90 ANSI target function 165
- Embedded IDE Link CC options 165
- How Model Reference Works 167
- Other Block Limitations 169
- Verification 173
- What Is Verification? 174
- Using Processor in the Loop 175
- 4 Verification 176
- Using Proc essor in the Loop 177
- Generic PIL Issues 179
- Profiling 179
- Real-Time Execution Profiling 183
- System Stack Profiling 191
- Profiling System Stack Use 193
- Exporting Filter 195
- Coefficients from FDATool 195
- About FDATool 196
- Studio Projects 198
- Selecting the Ex 199
- Choosing the Exp 200
- IDE Editor 203
- C header file 204
- .h) file that 206
- Coefficients to 209
- Processor Memor y 209
- - Increasing the filter order 210
- Processor 211
- 2 Start FDATool 212
- Write directly to memory 213
- Function Reference 217
- 6 Function Reference 218
- Functions — Alphabetical 223
- See Also build, new, remove 225
- Syntax animate(cc) 231
- See Also halt, restart, run 231
- Syntax build(cc,timeout) 232
- RTDX channels : 0 235
- Syntax ccsboardinfo 236
- See Also info, ticcs 241
- See Also dir, load, open 243
- Syntax clear(cc) 244
- 'channel') 245
- Using clos 246
- See Also disable, open 247
- , readmsg, write, writemsg 249
- Syntax datatypemanager(cc) 250
- Data Type Manager 252
- Add Typedef Dialog Box 255
- First Example 260
- Second Example 261
- Third Example 262
- See Also address, insert, run 267
- Syntax dir(cc) 268
- See Also cd, open 268
- See Also close, enable, open 270
- Syntax display(cc) 271
- See Also get 272
- 3 Channels must be open 273
- See Also enable, open 276
- Syntax halt(cc,timeout) 279
- , isrunning, run 280
- Syntax info = info(cc) 281
- See Also ticcs, dec2hex, get 283
- 'type') 284
- 'type',timeout) 284
- See Also address, remove, run 287
- 'datatype',count) 290
- 'datatype') 290
- Syntax b=isrtdxcapable(cc) 294
- Syntax isrunning(cc) 295
- Syntax isvisible(cc) 297
- See Also info, visible 298
- Syntax list(ff,varname) 303
- See Also info 312
- 'filename',timeout) 313
- 'filename') 313
- See Also cd, dir, open 314
- See Also cd, dir, load 322
- 4 Stop the running program 330
- Using Profiling 331
- See Also ticcs 335
- is 31 decimal on the page 337
- is 10 decimal on the page 337
- is 18 decimal on memory 337
- Working with Negative Values 339
- See Also readmsg, writemsg 344
- Examples cc = ticcs; 347
- , readmat, writemsg 348
- See Also read, regread, write 356
- Syntax s = reload(cc,timeout) 357
- See Also cd, load, open 358
- Purpose Reset processor 360
- Syntax reset(cc,timeout) 360
- Syntax restart(cc,timeout) 361
- See Also halt, isrunning, run 362
- , isrunning, restart 366
- See Also add, cd, close, open 368
- Syntax s = symbol(cc) 369
- See Also load, run 370
- Syntax cc = ticcs 371
- Support Coemulation and OMAP 376
- , ccsboardinfo, set 378
- Syntax visible(cc,state) 379
- See Also isvisible, load 380
- is 31 decimal on the 382
- is 10 decimal on the 382
- is 18 decimal 382
- Writing Negative Values 384
- See Also read, symbol 385
- Block Reference 389
- C281x DSP Chip S 390
- Target Prefere 391
- 8 Block Reference 392
- Vectorized Output 394
- C281x Hardware Interrupt 400
- Hardware Interrupt 406
- Idle Task 409
- Memory Allocate 412
- Memory Copy 418
- Memor y Copy 419
- Targ et Preferences 437
- Tar get Preferences 438
- Embedded IDE Link CC 511
- Configuration Parameters 511
- Embedded IDE Link CC Pane 512
- Export IDE link h 515
- See Also 516
- IDE link handle n 517
- Profile real-time execution 518
- Profile by 520
- Settings 522
- Dependencies 522
- Command-Line Information 522
- Recommended Settings 522
- Project options 526
- Compiler option 528
- Linker options s 530
- System stack siz 532
- Build action 533
- Call_custom_function 538
- PIL block action 539
- Dependency 540
- Maximum time all 541
- Maximum time to c 543
- Source file replacement 545
- A Supported Hardware 548
- OMAP Coemulatio 553
- Custom Hardwar 553
- Reported Limitations and 557
- Without Correct GEL Files 559
- Issues Using USB 560
- C6416 DSK and C67 560
- Size Greater Then 1 561
- Halt a Program 563
- File Not Found 564
- Code Composer Studio 565
- Find a Board 566
- % in single format 568
- Using Mapped Dri 570
- Archive_library 3-78 571
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