Linux Command Line Analog Input Finite Samples

The use of a custom command line function with arguments to do analog input for finite samples in Linux.

**The accompanying code represents a very specific use case for NI products. For more general examples, please refer to ni.com/examples, the LabVIEW Example Finder, or the NI driver help files that come with every NI driver.

This example demonstrates how to use a custom command and arguments to do analog input using DAQmx from the linux command line.  After the samples are acquired, they are displayed on the screen along with the number of samples and channels.  The example also includes a manual page for the command line analog input function.  Follow the directions in the README.txt in the RAR file for the file directory locations.  Below are the contents of the man page for the function ain.

AIN(8)                                                                  AIN(8)

NAME
       ain - finite analog input

SYNOPSIS
       ain [ device number ] [ channel ] [ range ] [ num samples ]

DESCRIPTION
       ain  will  acquire  a certain number of samples num samples from a data
       acquisition device device number on a specified  analog  input  channel
       channel

       These are the parameters:

       device number
              The  device  number  as  specified by DAQmx.  To get the list of
              devices with number run nilsdev which will give Dev# where #  is
              the device number

       channel
              The analog input channel to read the samples from.  You can also
              pass all to read from all analog input channels.

       range  The voltage range for the analog input channel(s) as in +-  (Ex:
              10).

       num samples
              The number of samples to acquire on the analog input channel

EXAMPLE
       ain 0 0 10 5

            Acquires  5  samples  from DAQ device Dev0 on analog input channel
       ai0 with voltage range of +- 10V

       ain 1 all 5 10

            Acquires 10 samples from DAQ device Dev1 on all analog input chan-
       nels with a voltage range of +- 5V

NOTE
       The range must be valid for the specified DAQ device

SEE ALSO
       aout(8), din(8), dout(8)

                                                                        AIN(8)

Requirements

Filename: analog_in.rar

Software Requirements

Language(s): C

Hardware Requirements

Hardware Group: Multifunction DAQ (MIO)
Driver: NI-DAQmx 8.0

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