• State Resolved
  • Locked Locked
  • Replies 6 replies
  • Subscribers 100 subscribers
  • Views 7211 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

Beaglebone GPIO interrupt example

Yovi Oktofianus
Prodigy 85 points

Hi,

I'm able to runs examples provided by Starterware for AM335x on my Beaglebone,and right now trying to use interrupt on GPIO pins. I'm able to configure the mux for the input pins that I'm using but it still not generating the interrupt.

Can anyone help me with sample code to activate/use interrupt on GPIO pins?

Regards,

Yovi

  • 0
    TI__Genius 17370 points

    Hi Yovi,

              For Beaglebone we dont have any sample code to demonstrate GPIO as input, but we have code for Output.

              If you can explain which GPIO you are using on beaglebone and how are you generating the interrupt (external GPIO trigger), we will be able to check this.

    Regards

    Baskaran

  • 0 in reply to Baskaran Chidambaram
    Prodigy 85 points

    Hi Baskaran,

    Yeah, I check all sample code for BeagleBone as well as sample for EVM board and I couldn't find any code that give me example regarding activating interrupt on GPIO.

    As of now I'm able to use GPIO1_7  (Pin #4 on P8 expansion header of beaglebone), I can read the value correctly which I think proved that my PINMUX setting is correct.

    Unfortunately I'm still not able to use this pin to trigger interrupt. My initial plan is just put a button to simulate the interrupt. If you have sample code on how to use any GPIO pin as interrupt source it should be helpful, cause I guess my problem is on the process to configure interrupt for GPIO.

    Regards,

    Yovi

  • 0 in reply to Yovi Oktofianus
    TI__Genius 17370 points

    Yovi,

          Before i check the GPIO1_7 for Beaglebone i want to share the GPIO0_2 configuration i did for AM335x EVM to generate interrupts. Attaching the code snippet here for your reference. Please check if this helps. Also i hope you are configuring the interrupt controller properly (are you able to get any other interrupts?).

    #define GPIO_WAKE_INSTANCE         (SOC_GPIO_0_REGS)
    #define GPIO_WAKE_PIN_NUM         (2)

        /* Enabling the GPIO module. */
        GPIOModuleEnable(GPIO_WAKE_INSTANCE);
        
        /* Perform a module reset of the GPIO module. */
        GPIOModuleReset(GPIO_WAKE_INSTANCE);
        
        /* Set the specified pin as an Input pin. */
        GPIODirModeSet(GPIO_WAKE_INSTANCE,
                       GPIO_WAKE_PIN_NUM,
                       GPIO_DIR_INPUT);
                       
        GPIOIntTypeSet(GPIO_WAKE_INSTANCE,
                        GPIO_WAKE_PIN_NUM,
                        GPIO_INT_TYPE_BOTH_EDGE);
                        
        HWREG(GPIO_WAKE_INSTANCE + 0x34) = 0x4;
        HWREG(GPIO_WAKE_INSTANCE + 0x38) = 0x4;
        
        HWREG(GPIO_WAKE_INSTANCE + 0x44) = 0x4;

    Regards

    Baskaran

  • 0 in reply to Baskaran Chidambaram
    Prodigy 85 points

    Hi Baskaran,

    Thanks for the snippet  it help, now I'm able to capture interrupt on GPIO pins.

     

    Regards,

     

    Yovi

  • 0 in reply to Yovi Oktofianus
    Prodigy 140 points

    Hi,

    Can u guys please provide the code snippet for initialization of interrupt controller for the GPIO0[2] pin at the rising edge to the pin.

    That will be very helpful.

    Thanks

  • 0 in reply to Kamal Negi1
    Prodigy 110 points

    Snippet provided above just add below line and delete that respective line from that code.

    GPIOIntTypeSet(GPIO_INSTANCE_ADDRESS,GPIO_INSTANCE_PIN_A,GPIO_INT_TYPE_RISE_EDGE);