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Table of Contents
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National Instruments Corporation ix AT-MIO-16X User Manual
Chapter 5
Programming
Register Programming Considerations...........................................................5-1
Resource Allocation Considerations ..............................................................5-1
Initializing the AT-MIO-16X.........................................................................5-2
Initializing the Am9513A ................................................................5-3
Programming the Analog Input Circuitry.......................................................5-5
Single Conversions Using the SCONVERT or
EXTCONV* Signal ......................................................................5-5
Generating a Single Conversion.....................................................................5-6
Reading a Single Conversion Result..............................................................5-7
Programming Single-Channel Data Acquisition Sequence............................5-7
Programming Data Acquisition Sequences with Channel Scanning..............5-10
Continuous Channel Scanning Data Acquisition.............................5-10
Interval-Channel Scanning Data Acquisition.................................................5-12
Data Acquisition Programming Functions ...................................................................5-14
Clearing the Analog Input Circuitry...............................................................5-14
Programming Single-Analog Input Channel Configurations.........................5-15
Programming Multiple-Analog Input Channel Configurations .....................5-15
Programming the Sample-Interval Counter....................................................5-16
Programming the Sample Counter(s).............................................................5-17
Sample Counts 2 through 65,536.....................................................5-18
Sample Counts Greater than 65,536 ................................................5-18
Programming the Scan-Interval Counter........................................................5-20
Applying a Trigger .........................................................................................5-21
Servicing the Data Acquisition Operation......................................................5-22
Resetting the Hardware after a Data Acquisition Operation..........................5-22
Resetting a Single Am9513A Counter/Timer..................................5-23
Programming the Analog Output Circuitry....................................................5-25
Cyclic Waveform Generation.........................................................................5-26
Programmed Cycle Waveform Generation ....................................................5-28
Pulsed Cyclic Waveform Generation.............................................................5-30
Waveform Generation Programming Functions ............................................5-32
Clearing the Analog Output Circuitry..............................................5-32
Selecting the Internal Update Counter.............................................5-32
Programming the Update-Interval Counter....................................................5-32
Programming the Waveform Cycle Counter..................................................5-34
Programming the Waveform Cycle Interval Counter ....................................5-34
Servicing Update Requests ..............................................................5-35
Programming the Digital I/O Circuitry.........................................................................5-36
Programming the Am9513A Counter/Timer................................................................5-37
RTSI Bus Trigger Line Programming Considerations .................................................5-37