National Instruments AT-MIO-64F-5, User Manual

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Programming Chapter 5
AT-MIO-64F-5 User Manual 5-8 © National Instruments Corporation
START
Program multiple analog
input channels, gains,
modes, and ranges
Program the
sample-interval
counter
Program the
sample counter
Clear the A/D
circuitry
Enable a scanning
data acquisition
operation
END
Apply a trigger
Service the data
acquisition operation
Figure 5-4. Continuous Scanning Data Acquisition Programming
Setting the SCANEN bit in conjunction with the DAQEN bit in Command Register 1 enables
scanning during multiple A/D conversions. The SCANEN bit must be set regardless of the type
of scanning used (continuous or interval); otherwise, only a single channel is scanned.
Interval Channel-Scanning Data Acquisition
Follow the programming steps listed in Figure 5-5 to program scanned multiple A/D conversions
with a scan interval (pseudosimultaneous) for posttrigger and pretrigger modes, as well as
internal and external timing. The instructions in the blocks of the following flow chart are
enumerated in the
Data Acquisition Programming Functions section later in this chapter.