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fread
length(A) might be less than the number of bytes requested if that
number of bytes are not currently available. It is zero if the operation
reaches the end of the file.
Examples Open the file dat a.dat in the target PC file system object fsys. Assign
the resulting file handle to a variable for reading.
h = fopen(fsys,'data.dat') or fsys.fopen('data.dat')
ans =
2883584
d = fread(h);
This reads the file data.dat and stores all of the contents of the file to
d. This content is in the xPC Target file format.
See Also xPC Target file object methods fclose, fopen,andfwrite.
MATLAB
fread function.
18-23
- 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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