Checking pulse with variable frequency in CRO using piccolo f28069

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

Submitted by ATHIESH on Fri, 03/28/2014 - 09:39 

I got an answer for creating a pulse with variable frequency from VisSim guys.I am getting the corresponding output in VisSim. But, when i am using target interface block to check the output in CRO. I am unable to check the same output in CRO [pulse with variable frequency, while changing the frequency in VisSim debug diagram ]. Which port (either GPIO or DAC) is used in debug diagram?

Find the attached files.Please let me know the faults.

Thanking you

Athieshkumar T NIT warangal

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 Sat, 03/29/2014 - 04:44.

    The plot shows exactly the right output for us. Here is what we see (all we did was change your slider to a sin). The diagram is attached.
    What do you mean by 'CRO'?

    <?xml version="1.0" encoding="UTF-8"?>sin-pulse-rate.png

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

    Submitted by ATHIESH on Sun, 03/30/2014 - 10:50.

    First of all thanks for replying. I can also get the same output, while checking in scope (plot inside VisSim) But, I need to check the same thing in cathode ray oscilloscope. For this whether I have to use GPIO or DAC or ePWM pins in piccolo f28069.

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

    Submitted by Anders89 on Sun, 03/30/2014 - 21:04.

    You can look at PWM or GPIO. There is no DAC on the chip. Your diagram is sending the output to GPIO31 but not PWM, so you will only see output on GPIO31. If you have a controlCARD, then you will notice that the LED blinks as GPIO31 is tied to one of the LEDs.
    As your frequencies are quite low (~1-10Hz) you will need to use a very slow time base.

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

    Submitted by Vijayalakshmiv on Fri, 05/02/2014 - 16:14.

    I tried to run the same vsm file attached here and got an error stating ' TI driver error 151 ' do we have to install additional drivers..? we are using the trial version.

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

    Submitted by ATHIESH on Fri, 05/02/2014 - 21:40.

    Hi,

    If you are using piccolo f28069 usb controlstick, once you inserted the controlstick it automatically start installing the drivers if not, go to device manager by right clicking 'My computer' and scan for hardware changes. If anything shows in yellow color, then right click and update it.

    First plug in the usb controlstick, open the vissim file and run the file.

    This will rectify your problem. if not mail me

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