Measurement-computing Data Acquisition Systems rev.10.4 Manuel d'utilisateur Page 81
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
daqAdcSetDataFormat
Also See: daqAdcSetMux, daqAdcSetClockSource, daqAdcSetTrig, daqAdcRdN
Format
daqAdcSetDataFormat(handle, rawFormat, postProcFormat)
Purpose
daqAdcSetDataFormat sets the format for both the raw and post-acquisition data returned by the
acquisition transfer functions.
Parameter Summary
Parameter Type Description
handle DaqHandleT
The handle to the device for which to set
the data format
rawFormat DaqAdcRawDataFormatT
Specifies the raw data format
postProcFormat DaqAdcPostProcDataFormatT
Parameter value specifying the data
formats available
Parameter Values
handle: obtained from the daqOpen function
rawFormat: see table below
postProcFormat: see table below
Parameter Type Definitions
rawFormat-(DaqAdcRawDataFormatT)
Definition Description
DardfNative
Data format follows the native-data format of the device it originated from.
DardfPacked
Raw acquisition values are compressed, using empty bits in native format (WaveBook/512 only)
postProcFormat-(DaqAdcPostProcFormatT)
Definition Description
DappdfRaw
Post-acquisition data follows the rawFormat parameter --this is the default setting.
DappdfTenthsDegC
Data format is in tenths of a degree Celsius
Returns
DerrNoError No error
Function Usage
Raw Data Formats
The rawFormat parameter indicates how the raw data format will be presented. Normally, the raw-data
format represents the data from the A/D converter. The default value for this parameter is DardfNative
where the raw-data format follows the native-data format of the A/D for the particular device. The parameter
can also be set to DardfPacked, which compresses raw A/D values in order to make full use of all unused
bits in any native format that leaves unused bits in the byte-aligned count value. For instance, a 12-bit raw
A/D value (which would normally be represented in a 16-bit word, 2-byte count value) will be compressed so
that 4 12-bit A/D raw counts can be represented in 3 16-bit word count values. Currently, only the
WaveBook/512 supports this packed format (used with the generic functions of the form
daqAdcTransfer…).
Programmer’s Manual 908594 Daq API Command Reference 4.2-25
- *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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