About Using F2812 SPI

Altair Forum User
Altair Forum User
Altair Employee
edited November 2020 in Community Q&A

Submitted by squek on Wed, 06/01/2011 - 21:30 

 

Hi, I am very new to Vissim ECD. I have no prior on programming MCU using VISSIM ECD. I am currently using VISSIM ECD version 8. I have been trying to use the SPI blocks for F2812 MCU. I follow the following procedures to create my model.

Configure MCU CONFIG.

Configure SPI CONFIG.

Write 1 using SPI WRITE

The program compile and run nicely. Although I set the program to run continously, I can't see the SPICLK showing up on my oscilloscope. Just wondering what have I done wrong? Please also refer to the attached file.

Thank you.

Unable to find an attachment - read this blog

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited June 2016

    Submitted by Anders89 on Thu, 06/02/2011 - 04:37.

    Note that the SPI CLK only runs while the 16 bits of data is transmitted. Your diagram is set to sample at 100 Hz. This means that you are getting a brief 1 MHz burst of 16 bits followed by a long time of dead air. This can be hard to see on a scope. Try bumping your sampling rate up to 10-100KHz and you should see some SPI activity.

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