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LAUNCHXL-F28069M: Problem with SCIA communication with activated interrupts and DCL PI controller included

Milad
Intellectual 285 points
Part Number: LAUNCHXL-F28069M

Hello guys,

   I've been working with a DCL in F28069M using a PI controller to regulate current on some coils. I was using J-tag window to adjust my variables and everything was going well till I tried to add the SCI feature to my project in order to make a GUI for my device using C#. 
I used SCIA interrupt features and I could send and receive a customized formatted string from my PC to my launchpad F28069M and everything went fine, I could check all the values in the debug window and I made sure my SCI connection/communication works perfectly fine!
But when I switched to real project, with activated SCIA interrupt, I can send and receive data but non of my GPIO's are working now !!! The coils are controlled through some GPIOs and I turn them on by selecting a specific GPIO pin which is activates the specific coil.
The GPIO pins I'm using are : 17-19-44-50-51-55. When I start the code the GPIO states remains on, which they must go low!(I think they remain pulled-up on input state) 

So what do you think is my problem?

when I activate this part of my code everything goes wrong:

 Regards

Milad

  • 0
    TI__Mastermind 27200 points

    Hello Milad,

    I'd start by checking your GPIO initialization. Set a break-point after the initialization part of your main code, but before the interrupts are enabled; then view the GPIOxMUX and GIOxDIR registers to ensure those I/O pins are properly configured as outputs. Also, check the muxing of your SCIA pins to ensure those are correct.

    There's nothing wrong with that code snippet, however I notice you have commented out the line which seems to enable the PIE module. ENPIE needs to be 1 or your SCI interrupts will not work. Please take a look at that too.

    Regards,

    Richard