MATLAB XPC TARGET RELEASE NOTES Guía de usuario Pagina 288
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15 Frequently Asked Questions
• Ensure that you have properly configured the driver.
• Ensure that you are using the latest version of the software .
• Test the hardware using the available diagnostic software included with
the I/O board from the manufacturer.
• Try a different target PC to verify the behavior.
• Report the issue to the MathWorks Support at
http://www.mathworks.com/support/contact_us/index.html.
Can I View the Contents of the Target PC Display on
theHostPC?
From the host PC, you can view the target PC monito r with the MATLA B
xpctargetspy command. For example
xpctargetspy('TargetPC1')
The Real-Tim e xPC Targe t Spy window is displayed on the host PC monitor.
Why Do Attempts to Run My Model Cause CPU
Overload Messages on the Target PC?
A CPU overload is not an error in the software. This condition indicates that
theCPUwasunabletocompleteprocessingamodeltimestepbeforebeing
asked to restart.
This error might occur if you have
• Real CPU overloads — Those caused by model design and/or target PC
resources in u se . For e xample, a model is trying to do more than can be
done in the allocated time on the target PC. Possible reasons are:
- The target PC is too slow or the model sample time is too small (see
“Dealing with Small Model Sample Times” on page 15-23)
- Model is too complex (algorithmic complexity)
- I/O Latency, where each I/O channel used introduces latency into the
system. This might cause the executiontimetoexceedthemodeltime
step.
15-22
- 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
- Working wi 8
- Graphical User Interfaces 10
- Execution Modes 10
- Environment 11
- Vector CANape Support 11
- Frequently Asked Questions 12
- Function Reference 14
- Functions 15
- Configuration Parameters 15
- Contents 16
- Target and Scope O bjects 17
- Target Objects 18
- Scope Objects 19
- 1 Target and Scop e Objects 20
- • TriggerS lope 23
- See the scope object function 23
- Targets and Scopes in the 25
- MATLAB Interface 25
- Working with Tar get Objects 26
- Deleting Target Objects 27
- Displaying Tar g 28
- Working with Target Ob jects 29
- Working with Scope Objects 31
- Pretriggering (P<0) 41
- Posttriggering (P>0) 42
- Acquisition of Gap-Free Data 44
- Signals and Parameters 49
- Monitoring Signals 50
- Mo del Hierarchy node 55
- Creating Scopes 65
- Target Scopes 67
- Scope 1 67
- Scope 2, click the xPC Target 69
- Scope 2. (Note that 69
- Start the scop 73
- Scope 2, right-click Scope 75
- Software Triggering Scopes 77
- Copying Files to the Host PC 83
- TargetPC1 85
- Scope of Type File 99
- 3 Signals and Parameters 100
- Signal Tracing 101
- Signal Logging 105
- Hierarchy 115
- 7 Press the Enter key 117
- 800 and click OK 123
- Inlined Parameters 127
- 10 Click Apply ,thenclickOK 129
- 11 In th 129
- Signal Generator 131
- Booting from a DOS Device 135
- DOSLoader Mode 136
- Restrictions 137
- 4 Bo oting from a DOS Device 138
- Creating a DOS System Disk 140
- Embedded Option 141
- Introduction 142
- 5 Embedded Option 144
- Embedded Option Setup 147
- Stand-Alone Target Setup 148
- Updating Enviro 149
- Software Environment and 153
- Target PCs 154
- Explorer 155
- Settings 157
- 1MB, 4MB,or16 158
- Appearance 158
- 1 In the MATLAB window, type 159
- 2 In the MATLAB window, type 159
- Working with Target PC 165
- Environments 165
- Properties 167
- To check your changes, type 170
- Alternatively, you can type 171
- Using the Target PC 173
- Command-Line Interface 173
- Target PC 175
- Files and File Systems 181
- methods for both 184
- Using xpctar get.ftp Objects 185
- Using xpctarget.ftp Objects 187
- Using xpctar get.fs Objects 189
- Using xpctarget.fs Objects 191
- 10 Graphical User Interfaces 200
- From xPC Target Block 203
- Marking Block Parameters 205
- Marking Block Signals 207
- Interface 211
- Web Browser Interface 212
- Disconnect 213
- Using the Main Pa 217
- Changing WWW Properties 219
- 4 Click OK 222
- Introducing Execution Modes 224
- Interrupt M ode 225
- 12 Execution Modes 226
- Polling Mode 227
- Setting the Polling Mode 229
- -axpcCPUClockPoll=1200 231
- -axpcCPUClockPoll=0 231
- Target Application 233
- Within a Model 235
- Polling M o de 237
- Incorporating Fortran 239
- Code into the xPC Target 239
- Before You Start 240
- Prerequisites 241
- In This Example 243
- Compiling Fortran Files 245
- SimStruct) 246
- Vector CANape S upport 255
- Vector CANape 256
- - tg.start 257
- - tg.stop 257
- 14 Vector CANape 258
- Software 259
- Event Mode Data Acquisition 265
- Over view 268
- BIOS Settings 269
- Booting Issues 270
- - BOOTSECT.RTT 270
- - XPCTGB1.RTA 270
- Is the Target PC Halted? 271
- Communications 272
- 15 Frequently Asked Questions 274
- Communication Issues? 275
- - ReadFile Err or: 6 280
- - Reinstall the software 280
- 2 At the MATLAB prompt, type 281
- Troubleshooting Build Issues 285
- - States 293
- - Output 293
- - Final sta 293
- - Signal lo 293
- Partitions? 299
- 2^(n-1) 301
- Refer to the Documentation 303
- Target PC Command-Line 305
- Interface Reference 305
- Target PC Commands 306
- Scope Object Methods 308
- Software Environment 314
- Open xPC Target Explorer 315
- 17 Function Reference 316
- Target Application Objects 317
- File and File System Objects 320
- Add (env c olle ction object) 326
- Purpose Create scopes 327
- Syntax MATLAB command line 327
- Arguments 327
- ,targ et_PC_dir) 332
- Purpose Remove target obje ct 334
- ,file_ID) 339
- See Also set (env object) 362
- The target object methods 372
- The built-in MATLAB functions 372
- NumSamples 387
- Item (env collection object) 406
- Syntax file=readxpcfile(data) 414
- Purpose Reboot target PC 416
- Signals updated 422
- MaxModelSize 431
- See Also get (env object) 438
- CommunicationTimeOut 450
- 'Normal' 450
- OutputLog changes 450
- SampleTime 450
- NewValues: {[10] [100]} 454
- The scope object method 468
- See Also xpctarget.xpc 475
- Property 486
- , delete,andtarge tping 490
- Argument 493
- 19 Configuration Parameters 500
- Command-Line Information 503
- See Also 503
- Specify target PC name 505
- Dependencies 507
- Execution mode 509
- I/O board genera 511
- Allow tasks to ex 515
- Log Task Executi 517
- Include model hi 525
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