MATLAB EMBEDDED IDE LINK 4 - FOR USE WITH TEXAS INSTRUMENTS CODE COMPOSER STUDIO Guía de usuario Pagina 107
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Schedulers and Timing
• Generated code that incorporates DSP /B IO S real-time operating sy stem
(RTOS)
• Generated code that does not include DSP/BIOS RTOS
Note In timer-based models, the timer counts through one full
base-sample-time before it creates an interrupt. When Simulink software
finally execute the model, it is for time 0.
The following figure shows the relationship between model startup and
execution. Execution starts where your model executes the first interrupt,
offset to the right of t=0 from the beginning of the time line. Before the first
interrupt, the simulation goes through the timer set up period and one base
rate period.
t=0.0
Base rate task
execution time
Timer setup
period
Base rate
period
Base rate
period
Base rate
period
Timer-based scheduling does not provide enough fl exibility for some systems.
Systems for control and communications m ust respond to asynchronous
events in real time. Such systems may need to handle a variety of hardware
interruptsinanasynchronous,oraperiodic ,fashion.
3-17
- 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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