Measurement-computing Data Acquisition Systems rev.10.4 Manuel d'utilisateur Page 118
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
daqAdcTransferSetBuffer
Also See: daqAdcTransferStart, daqAdcTransferStop,
daqAdcTransferGetStat, daqAdcSetAcq,
daqAdcTransferBufData
Format
daqAdcTransferSetBuffer(handle, buf, scanCount, transferMask)
Purpose
daqAdcTransferSetBuffer configures transfer buffers for acquired data, and can also be used to
configure the specified user- or driver-allocated buffers for subsequent acquisition transfers.
Parameter Summary
Parameter Type Description
handle DaqHandleT
Handle to the device for which an ADC transfer is to be
performed
buf PDWORD
Pointer to the buffer for which the acquired data is to be
placed
scanCount DWORD
The total length of the buffer (in scans)
transferMask DWORD
Configures the buffer transfer mode
Parameter Values
handle: obtained from the daqOpen function
buf: must be a valid pointer to memory whose size is at least:
(scanCount) * scan size * 2 (the sample size, normally 2 bytes)
scanCount: valid values for buffer length are 1 to 4,294,967,295 scans, however, memory limitaions apply
transferMask: see table below
Parameter Type Definitions
transferMask
Definition Description
DatmCycleOn
Defines the buffer as a circular buffer
DatmCycleOff
Defines the buffer as a linear buffer
DatmUpdateSingle
Defines the update mode as single sample
DatmUpdateBlock
Defines the update mode as block update
DatmDriverBuf
Causes the driver to allocate the acquisition transfer buffer as a circular buffer
DatmUserBuf
Specifies a user-allocated and managed acquisition transfer buffer
DatmIgnoreOverruns
Ignores buffer overruns. Upon a buffer wrap, no error will be returned.
Returns
DerrNoError No error
4.2-62 Daq API Command Reference 988594 Programmer’s Manual
- *372195A-01* 1
- How to use this Manual 3
- 908494 Programmer’s Manual 4
- Table of Contents 5
- Introduction 1 7
- Language Support 8
- Driver Installation 9
- 908494 Programmer’s Manual 10
- Data Acquisition Environment 11
- Signal Environment 12
- 988594 Programmer’s Manual 14
- For x% = 0 To 3 30
- 0, 0, x%, bitVal&) 30
- Next x% 30
- Zero Compensation 33
- Linear Conversion 35
- End Sub 36
- Using Multiple Devices 3 37
- Internal Clock Method 40
- Master Clock Method 41
- External Clock Method 43
- Overview 45
- 938395 Programmer’s Manual 46
- Mask and Flag Definitions 50
- 961 962 963 ... 999 59
- 941 942 ... 958 959 960 59
- Raw Data Formats 81
- Setting the Scan Rate 89
- Scan Rate Mode 89
- Scan Rate State 90
- Actual Scan Rate 90
- 94
- DBK16-Read Offset Trimpot 95
- DBK43-Read Offset Trimpot 96
- Typical flags Settings 100
- Settings 101
- Prototypes 102
- Program References 102
- Function Usage 104
- Visual BASIC 105
- Returns 114
- Data Transfer Progress 115
- Example Acquisition States 116
- DazcNone 124
- DazcAutoZero 124
- Parameter Type Description 129
- Definition Description 129
- Purpose 131
- Offset value to apply 142
- Parameter Values 144
- parameters 148
- Parameter Summary 150
- Parameter Type Definitions 150
- Moving Averages 160
- Definition Description 165
- Using Thermocouples (T/Cs) 172
- T/C Gains Settings 173
- Daq/2000 Series devices* 174
- Setting the Output Mode 184
- Buffer Management 201
- DAC0 DAC1 DAC2 DAC3 P3 DO 202
- DAC0 DAC2 P3 DO 202
- Note 1: 206
- Offset for header in bytes 208
- Update Cycle Data Blocks 211
- Update/Sample Data Format 212
- Output From File Operation 212
- DaqBoard/2000c Series 219
- Setting the DAC Value 227
- 908794 Programmer’s Manual 232
- (continued) 249
- DdiProtocolInfo 251
- DdiExtFeatures 251
- Local I/O 262
- Expansion I/O 262
- Local I/O 266
- 957193 Programmer’s Manual 280
- (for 14 sample settings 282
- 2, 4, 8, 16, 32, 64 282
- 128, etc. up to 16384) 282
- Option Value (optionValue) 284
- Counter Mode 285
- 908594 Programmer’s Manual 286
- Set the Excitation Source 289
- DmotWbk14ExcSrcApply 289
- Sets the Dac Offset 290
- Use DC coupling when 290
- Example: 291
- DcovWbk17Mode_Period 295
- DcovWbk17Mode_Pulsewidth 296
- DcovWbk17Mode_Timing 296
- DcovWbk17Mode_Encoder 296
- Setting the Trigger Level 306
- API Error Codes - daqError 319
- A2 - 162 331
- Programmer’s Manual 332
- Appendix A A 333
- 988294 Programmer’s Manual 334
- 939198 Programmer’s Manual 336
- Custom OEM Installation C 337
- WIN 9x/Me WIN NT/2000/XP 338
- WIN 9x/Me and 338
- WIN NT/2000/XP 338
- Installation Locations: 339
- 958293 Programmer’s Manual 340
- 938295 Programmer’s Manual 342
- Format 347
- Time-of-Day Configuration 356
- Glossary 359
- 986896 Programmer’s Manual 360
- 986896 Glossary G-3 361
- 986896 Glossary G-5 363
- 986896 Glossary G-7 365
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