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Getting GPIO status in TMS320F28027

Mahesh Kodakkattil
Intellectual 460 points

Hi,

 I am using below instruction to get the status of the GPIO_Number_3. I am not getting the status of 1 when I the input is high and 0 when the GPIO input is low. Please support me.

if(GPIO_getData(myGpio, GPIO_Number_3) == 1)

                     {

                   Setting();

                     }

                   else if (GPIO_getData(myGpio, GPIO_Number_3) == 0)

                     {

                     Monitoring();

                     }

Regards,

Mahesh K.R.

  • 0
    Guru 192875 points

    Hi Mahesh,

    There seems to be issue with the GPIO initialization. Have you initialized GPIO3 as input?

    Can you please attach your code for scrutiny?

    Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    Intellectual 460 points

    Hi Gautam,

      Please see below.

    void InitGPIO()

    {

     

             GPIO_setMode(myGpio, GPIO_Number_0, GPIO_0_Mode_EPWM1A);

             GPIO_setMode(myGpio, GPIO_Number_1, GPIO_1_Mode_EPWM1B);

             GPIO_setMode(myGpio, GPIO_Number_2, GPIO_2_Mode_EPWM2A);

     

                         GPIO_setMode(myGpio, GPIO_Number_3, GPIO_3_Mode_GeneralPurpose);

                         GPIO_setMode(myGpio, GPIO_Number_28, GPIO_0_Mode_GeneralPurpose);

                         GPIO_setMode(myGpio, GPIO_Number_29, GPIO_0_Mode_GeneralPurpose);

                         GPIO_setMode(myGpio, GPIO_Number_4, GPIO_0_Mode_GeneralPurpose);

                         GPIO_setMode(myGpio, GPIO_Number_5, GPIO_0_Mode_GeneralPurpose);

                         GPIO_setMode(myGpio, GPIO_Number_6, GPIO_0_Mode_GeneralPurpose);

                         GPIO_setMode(myGpio, GPIO_Number_7, GPIO_0_Mode_GeneralPurpose);

                         GPIO_setMode(myGpio, GPIO_Number_12, GPIO_0_Mode_GeneralPurpose);

                         GPIO_setMode(myGpio, GPIO_Number_19, GPIO_0_Mode_GeneralPurpose);

                         GPIO_setMode(myGpio, GPIO_Number_34, GPIO_0_Mode_GeneralPurpose);

                         GPIO_setMode(myGpio, GPIO_Number_18, GPIO_0_Mode_GeneralPurpose);

     

     

     

             GPIO_setPullUp(myGpio, GPIO_Number_0, GPIO_PullUp_Disable);

             GPIO_setPullUp(myGpio, GPIO_Number_1, GPIO_PullUp_Disable);

             GPIO_setPullUp(myGpio, GPIO_Number_2, GPIO_PullUp_Disable);

     

                   GPIO_setDirection(myGpio, GPIO_Number_3, GPIO_Direction_Input);

                GPIO_setDirection(myGpio, GPIO_Number_28, GPIO_Direction_Output);

                GPIO_setDirection(myGpio, GPIO_Number_29, GPIO_Direction_Output);

                GPIO_setDirection(myGpio, GPIO_Number_4, GPIO_Direction_Output);

                GPIO_setDirection(myGpio, GPIO_Number_5, GPIO_Direction_Output);

                GPIO_setDirection(myGpio, GPIO_Number_6, GPIO_Direction_Output);

                GPIO_setDirection(myGpio, GPIO_Number_7, GPIO_Direction_Output);

                GPIO_setDirection(myGpio, GPIO_Number_12, GPIO_Direction_Output);

                GPIO_setDirection(myGpio, GPIO_Number_19, GPIO_Direction_Output);

                GPIO_setDirection(myGpio, GPIO_Number_34, GPIO_Direction_Output);

                GPIO_setDirection(myGpio, GPIO_Number_18, GPIO_Direction_Output);

     

     

     

                GPIO_setLow(myGpio, GPIO_Number_28);

                GPIO_setLow(myGpio, GPIO_Number_29);

                GPIO_setLow(myGpio, GPIO_Number_4);

                GPIO_setLow(myGpio, GPIO_Number_5);

                GPIO_setLow(myGpio, GPIO_Number_6);

                GPIO_setLow(myGpio, GPIO_Number_7);

                GPIO_setLow(myGpio, GPIO_Number_12);

                GPIO_setLow(myGpio, GPIO_Number_19);

                GPIO_setLow(myGpio, GPIO_Number_34);

                GPIO_setLow(myGpio, GPIO_Number_18);

     

    }

    I want to know the syntax and usage of the GPIO_getdata given below is correct or not. 

    if(GPIO_getData(myGpio, GPIO_Number_3) == 1)

                         {

                       Setting();

                         }

                       else if (GPIO_getData(myGpio, GPIO_Number_3) == 0)

                         {

                         Monitoring();

                         }

    Regards,

    Mahesh K.R.

     

     

     

  • 0 in reply to Mahesh Kodakkattil
    Guru 192875 points

    Hi,

    For a button press this is how the scanning is done:

      while(GPIO_getData(myGpio, GPIO_Number_12) != 1)

    The way you've implemented seems to be fine.

    Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    Intellectual 460 points

    Hi Gautam,

      Thanks for that. Let me try and see the result. I will come back to you tomorrow.

    Regards,

    Mahesh K.R.

  • 0 in reply to Gautam Iyer
    Intellectual 460 points

    Hi Gautam,

        The issue was the reverse logic in the switch not the code. It is working now. Thank you very much for the support.

    Regards,

    Mahesh K.R.

  • 0 in reply to Mahesh Kodakkattil
    Guru 192875 points

    Gr8 to know and Congrats!

    Cheers,

    Gautam