Measurement-computing TempBook rev.3.0 Uživatelský manuál Strana 124
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Hodnocené. / 5. Na základě hodnocení zákazníků
10-28
Enhanced
API Programming Models (TempBook) TempBook User’s Manual
Summary Guide of Selected Enhanced API Functions
The following table organizes the enhanced API functions by type and includes a brief description.
Simple One-Step Routines
For single gain, consecutive channel, foreground transfers, use the following functions:
Foreground Operation Single Scan Multiple Scans
Single Channel
daqAdcRd daqAdcRdN
Consecutive Multiple Channels
daqAdcRdScan daqAdcRdScanN
Complex A/D Scan Group Configuration Routines
For non-consecutive channels, high-speed digital channels, multiple gain settings, or multiple polarity settings, use the SetScan
functions.
daqAdcSetScan
Set scan sequence using arrays of channel and gain values.
daqAdcSetMux
Set a contiguous scan sequence using single gain, polarity and channel flag values
Trigger Options
After the scan is set, the trigger needs to be set. The two triggering modes are one-shot or continuous.
•
In one-shot mode, a trigger is required to start each A/D scan.
•
A single trigger starts the scans, and the pacer clock determines the rate between scans.
Note
: If the trigger source is analog, a trigger level is also required.
daqAdcSetTrig
Configure the trigger event using source, level, rising and channel values.
daqAdcCalcTrig
Using the selected trigger voltage, trigger direction, channel gain, and reference voltage, return the
analog trigger source and value which can be used with
daqAdcSetTrig
.
If a software trigger is selected, the start time of the scan depends on the application calling
daAdcSoftTrig
.
Multiple Scan Timing
If the acquisition is to have multiple scans and the trigger mode is one-shot, the pacer clock needs to be set with one of the
following functions:
daqAdcSetRate
Set/Get the specified frequency or period for the specified mode.
daqAdcSetFreq
Set the pacer clock to the given frequency.
A/D Acquisition
A/D acquisition settings are not active until the acquisition is armed.
daqAdcArm
Arm an A/D acquisition using the current configuration. If the trigger source was set to be immediate,
the acquisition will be triggered immediately.
daqAdcDisarm
Disarm the current acquisition if one is active. This command will disarm the current acquisition and
terminate any current A/D transfers.
daqAdcSetAcq
Define the mode of the acquisition and set the pre-trigger and post-trigger acquisition counts, if
applicable.
A/D Data Transfer
After the acquisition is started, the data needs to be transferred to the application buffer. Three routines are used:
daqAdcTransferSetBuffer
Configure a buffer for A/D transfer. Allows configuration of the buffer for block and single
reading update modes as well as linear and circular buffer definitions.
daqAdcTransferStart
Start a transfer from the Daq* device to the buffer specified in the
daqAdcTransferSetBuffer
command
daqAdcTransferStop
Stop a transfer from the Daq* device to the buffer specified in the
daqAdcTransferSetBuffer
command
To find out whether a background A/D transfer is complete or to stop transfers, use the following function:
daqAdcTransferGetStat
Return current A/D transfer status as well as a count representing the total number of transferred
scans or the number of scans available.
- User’s Manual 1
- TempBook/66-901 2
- How To Use This Manual 3
- Table of Contents 4
- 5 Programmer’s Guide 5
- 8 Thermocouple Measurement 5
- 6
- Introduction and Quick Start 7
- Available Accessories 8
- Specifications 8
- Quick Start 9
- Power Connection 10
- Software Installation 10
- Inspection 11
- TempBook Termination Card 12
- Analog Signal Connection 12
- Internal Configuration 13
- Hardware Installation 13
- Charging the Battery Modules 14
- Parallel Port Capabilities 15
- Resource Tests 17
- Performance Tests 17
- Connection Troubleshooting 18
- Calibration of TempBook 18
- Using TempView 19
- TempView Components 20
- Acquisition Configuration 21
- Counter/Timer Window 22
- Digital I/O Window 22
- TempView Menu Items 23
- Select Device 24
- Acquisition 24
- Using PostView 25
- PostView Toolbar Items 26
- 11-16-00 27
- The PostView Timebase 28
- Data File Accessibility 28
- Programmer's Guide 29
- Data Acquisition 30
- Program Flowchart 30
- Driver Options 31
- High-Level Analog Input 33
- Low-Level Analog Input 34
- High-Speed Digital Input 36
- Counter/Timer Functions 37
- Thermocouple Linearization 39
- Sample Programs 40
- General Purpose Digital I/O 43
- Counter Timer Functions 45
- Software Calibration 51
- Calibration Example 52
- Zero Compensation 53
- Zero Compensation Example 54
- Automatic Zero Compensation 55
- Thermocouple Measurement 57
- Single-Channel Measurement ( 59
- General Functions 62
- Thermocouple 93
- API Error Codes - C Languages 93
- API Error Codes - QuickBASIC 94
- Data Acquisition Environment 97
- Basic Models 98
- Enhanced 100
- TempBook User’s Manual 101
- 10-10 106
- 10-12 108
- 10-14 110
- Background Acquisition 112
- Finally, close the device: 113
- 10-18 114
- 10-20 116
- Double Buffering 117
- 10-22 118
- Direct-to-Disk Transfers 119
- 10-24 120
- 10-26 122
- Overview 125
- API Reference Tables 159
- Event-Handling Definitions 160
- ADC Miscellaneous Definitions 161
- TempBook Definitions 162
- General I/O Definitions 162
- Command Definitions 162
- API Error Codes 163
- Appendix 165
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