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EK-TM4C129EXL: How can I set up and configure new GPIO as interrupts in S2E examples?

jean Mugiraneza
Prodigy 50 points
Part Number: EK-TM4C129EXL
Other Parts Discussed in Thread: EK-TM4C1294XL

Hi, 

How can I set up and configure new GPIO as interrupts?

I am new to EK-TM4C129EXL board but trying to use it for serial to Ethernet application.

Based on ENET_S2E, i would like to add set up new GPIO PK4,PK5 and PK6 as interrupt for additional functionality.

In which "ene_s2e" directory/files should I amend the modifications and configurations? is there any simple code I can refer to?

Kind regards,

Jean

  • 0
    TI__Guru**** 191486 points

    Hi,

      There is a GPIO interrupt example at C:\ti\TivaWare_C_Series-2.2.0.295\examples\boards\ek-tm4c1294xl\interrupts. You can reference this example. In this example, GC0, GL1 and GB3 pins are used to generate interrupts. You can adapt to PK4, PK5 and PK6. The code is quite simple, you can add the interrupt code in the main() if you want. 

  • 0 in reply to Charles Tsai
    Prodigy 50 points

    Thank you Charles, the examples did give an insight of setting the GPIO. However, the reference set interrupts as outputs. I forgot to mention that I want to set GPIO as input for external signals. PK4 and PK5 as external PU and PK6 as external PD.

    is there any reference on GPIO as external PD interrupts?

    Kind regards,

    Jean

  • +1 in reply to jean Mugiraneza
    TI__Guru**** 191486 points

    Hi,

      Below is an example code for PP0 and PP1 to generate interrupts based on falling edge inputs.

    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOP);
    while(!SysCtlPeripheralReady(SYSCTL_PERIPH_GPIOP))
    {
    }
    GPIOPinTypeGPIOInput(GPIO_PORTP_BASE, GPIO_PIN_0 | GPIO_PIN_1);
    GPIOPadConfigSet(GPIO_PORTP_BASE, GPIO_PIN_0 | GPIO_PIN_1, GPIO_STRENGTH_4MA, GPIO_PIN_TYPE_STD_WPU);
    GPIOIntTypeSet(GPIO_PORTP_BASE, GPIO_PIN_0 | GPIO_PIN_1, GPIO_FALLING_EDGE);


    GPIOIntRegisterPin(GPIO_PORTP_BASE, GPIO_PIN_0, UserButton1ISR);
    GPIOIntRegisterPin(GPIO_PORTP_BASE, GPIO_PIN_1, UserButton2ISR);

    GPIOIntEnable(GPIO_PORTP_BASE, GPIO_INT_PIN_0 | GPIO_INT_PIN_1);

    IntEnable(INT_GPIOP0);
    IntEnable(INT_GPIOP1);
    IntMasterEnable();

  • 0 in reply to Charles Tsai
    Prodigy 50 points

    Hi Charles,

    Thank you so much.

    That solved my problems.

    Kind regards,

    Jean