Interrupt for pushbutton for KE06Z SDK.

[tcwong]

Hello,

I'm currently reading a pushbutton input with the function GPIO_PinRead(kGPIO_PORTA,16u) but I'm currently implementing it with the use of polling at the beginning of a while(1) loop. However, I'd like to convert this into an interrupt. How would you do this? Thank you in advance.

Best,

Tyler

[kerryzhou]

Hi Tyler Wong,

   Please use the IRQ function, it will get the pin input interrupt, you can refer to this code:

   SDK_2.6.0_FRDM-KE06Z\boards\frdmke06z\driver_examples\irq

  More details, please check the KE reference manual, IRQ chapter.

Wish it helps you!

If you still have questions about it, please kindly let me know.
Have a great day,
Kerry

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[tcwong]

Thanks for the response Kerry!

I'm still unsure of how to set an input on a certain pin to trigger the IRQflag. Any advice on how to do this? Thank you.

Best,

Tyler

[tcwong]

Actually I just realized PTA5 works because it's an IRQ pin. Are you able to mux PTC0 for example to PTA5 to make it an IRQ pin? Sorry for the double reply.

[kerryzhou · Accepted solution]

Hi Tyler Wong,

    About set the pin on a certain pin to trigger the IRQ, you need to check the pins which has the IRQ function, then use this code to select the IRQ pin:

PORT_SetPinSelect(kPORT_IRQ, kPORT_IRQ_PTA5);              /* pin 79 is configured as IRQ *

You can find the KE06 IRQ pin is:

    kPORT_IRQ_PTA5 = 0U,             /*!< IRQ is mapped to PTA5. */
    kPORT_IRQ_PTI0 = 1U,             /*!< IRQ is mapped to PTI0. */
    kPORT_IRQ_PTI1 = 2U,             /*!< IRQ is mapped to PTI1. */
    kPORT_IRQ_PTI2 = 3U,             /*!< IRQ is mapped to PTI2. */
    kPORT_IRQ_PTI3 = 4U,             /*!< IRQ is mapped to PTI3. */
    kPORT_IRQ_PTI4 = 5U,             /*!< IRQ is mapped to PTI4. */
    kPORT_IRQ_PTI5 = 6U,             /*!< IRQ is mapped to PTI5. */
    kPORT_IRQ_PTI6 = 7U,             /*!< IRQ is mapped to PTI6. *

So, unfortunately, your PTC0 pin don't have the IRQ function, you also can find the details from the KE06 reference manual, chapter 10.2.1 Signal multiplexing and pin assignments.

Do you mind to use the other IRQ pin, or just need to use the PTC0?

If you want to use PTC0, you also can use it's KBI function, then use the KBI interrupt to detect it.

About the KBI code, you can refer to the SDK examples which located in this folder:

SDK_2.6.0_FRDM-KE06Z\boards\frdmke06z\driver_examples\kbi

Wish it helps you!

If you still have questions about it, please kindly let me know.
Have a great day,
Kerry

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