Interrupt handler for ENC phase inputs?

[jackking]

I am trying to find documentation or an example of the MCUXpresso SDK ENC module that uses interrupts on the phase inputs.

The SDK examples use a polling cycle to look for increments of the position value, but I would like to trigger an interrupt if the position value changes.  I do see that there is an interrupt config for tracking index, but I don't see a corresponding example for the position value.

thanks

[FelipeGarcia]

Hi Jack,

Could you please specify the MCU you are working on?

Best regards,

Felipe

[jackking]

Sure, it is the IMXRT1052

[FelipeGarcia]

Hi Jack,

Unfortunately, we don’t have examples using interrupt for position value. However, you have the following interrupt triggers.

enum _enc_interrupt_enable

{

    kENC_HOMETransitionInterruptEnable = (1U << 0U),  /*!< HOME interrupt enable. */

    kENC_INDEXPulseInterruptEnable = (1U << 1U),      /*!< INDEX pulse interrupt enable. */

    kENC_WatchdogTimeoutInterruptEnable = (1U << 2U), /*!< Watchdog timeout interrupt enable. */

    kENC_PositionCompareInerruptEnable = (1U << 3U),  /*!< Position compare interrupt enable. */

    kENC_SimultBothPhaseChangeInterruptEnable =

        (1U << 4U),                                     /*!< Simultaneous PHASEA and PHASEB change interrupt enable. */

    kENC_PositionRollOverInterruptEnable = (1U << 5U),  /*!< Roll-over interrupt enable. */

    kENC_PositionRollUnderInterruptEnable = (1U << 6U), /*!< Roll-under interrupt enable. */

};

I believe the one you are looking for is kENC_PositionCompareInerruptEnable.

Hope it helps!

Best regards,

Felipe

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