• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 82 subscribers
  • Views 272 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Compiler/LAUNCHXL-F28379D: Reading ePWM pins

Lahiru Sandaruwan
Intellectual 270 points

Tool/software: TI C/C++ Compiler

Hi,

I want to read ePWM pins and take some decisions according to their state. ePWM outputs are working fine but it seems the comparison of ePWM signals are not performing. Following if the comparison component of the my code.

 if (GpioDataRegs.GPADAT.bit.GPIO11 == 1 && (GpioDataRegs.GPADAT.bit.GPIO8 == 0)  && (GpioDataRegs.GPADAT.bit.GPIO12 == 0))
 {

         GpioDataRegs.GPASET.bit.GPIO6 = 0x1; //Turn on IGBT 5 : pin 80
         GpioDataRegs.GPASET.bit.GPIO4 = 0x1; //Turn on IGBT 6 : pin 36  

 }

and I tried the following as well,

 if (GpioDataRegs.GPADAT.bit.GPIO11  && (!GpioDataRegs.GPADAT.bit.GPIO8)  && (!GpioDataRegs.GPADAT.bit.GPIO12))
 {

       GpioDataRegs.GPASET.bit.GPIO6 = 0x1; //Turn on IGBT 5 : pin 80
       GpioDataRegs.GPASET.bit.GPIO4 = 0x1; //Turn on IGBT 6 : pin 36  //Turn on T1 IGBTs

 }

Please correct me if I'm done anything wrong.

Thank You

Lahiru

  • 0
    TI__Expert 3720 points

    Hi,

    I don't see any issue with your comparison expression as such but still I would recommend putting negation (!) outside brackets as a good prctice i.e.

    if (GpioDataRegs.GPADAT.bit.GPIO11  && !(GpioDataRegs.GPADAT.bit.GPIO8)  && !(GpioDataRegs.GPADAT.bit.GPIO12))

    {

    }

    Now, are you sure that the following condition ever holds true i.e. at a time only GPIO11 is HIGH while the other two GPIOs are low, better to capture the three waveform using oscilloscope and check if the condition ever holds true.

    If my reply answers your question please click on "This resolved my issue" button located at the bottom of my post.

    Regards

    Himanshu