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VirtualBench: Master SPI With the DIO

by: Community Team
‎03-10-2015 06:17 AM
Last Edited by: Member migration-bot ‎11-13-2023 08:10 PM

Products and Environment

This section reflects the products and operating system used to create the example.

To download NI software, including the products shown below, visit ni.com/downloads.

    Hardware

  • VirtualBench All-in-One Instrument

Code and Documents

Attachment

Description

Overview
This example automates the digital input output (DIO) channels to master SPI commands and performs a read.


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Steps to Run Program

    1. Download the example program on the right under downloads.
    2. In LabVIEW software, open the program by going to File » Open… and navigating to the file.
    3. Connect the VirtualBench device.
    4. Select the correct VirtualBench bus channel from the pull-down menu of the VirtualBench Bus Channel control. Set the clock rate, clock polarity, clock phase, and chip select polarity; specify the data to write
    5. Click the Run button to write and read data.
    6. The data acquired will display in the Results indicator.

 

Program Explained

 


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    • Initialize Session
      • The VirtualBench bus channel is passed into the SPI Initialize VI to initialize a new session on the SPI engine for the device.
      • A Boolean true constant is also passed into the VI to reset the device to default values.
    • Configure Instrument
      • Instrument and error information are passed into the SPI Configure Bus VI along with the clock rate, clock polarity, clock phase, and chip select polarity.
    • Perform Operation
      • Instrument and error information are passed to the SPI Write Read VI.
      • The data to write is also passed into the VI, and then the VI performs a write followed by a read.
      • The VI then outputs the data read to the indicator on the front panel.
    • Close Session
      • The instrument and error information are passed to the SPI Close VI. This closes the session and deallocates any resources for the next time a session is created with the instrument.
    • Handle Errors
      • Finally, the error information is passed into the Simple Error Handler VI. If an error has occurred, a dialog box will open to notify the user.

 

Additional Resources

 

VirtualBench Examples

Example code from the Example Code Exchange in the NI Community is licensed with the MIT license.

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