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Original question:

LAUNCHXL-F28379D: GPIO Interrupt Malfunction when turning on current sensor input to ADC

CC3220SF-LAUNCHXL: Input Qualification

kshivran
Prodigy 160 points
Part Number: CC3220SF-LAUNCHXL

Hi,

I need to get external interrupt on one of the GPIO of CC3220SF-LAUNCHXL for some functionality. This interrupt is getting triggered even when there is some noise, so I want to put something like input Qualification in C2000 (F28379D).

Can anyone help in this regard?

Thank you.

Best Regards,

Kuldeep 

  • 0
    Guru 73205 points

    Hi Kuldeep,

    CC32xx does not support this feature natively. But you can implement this by software easily. There is multiple ways how this can be achieved. For example:

    • when GPIO interrupt is triggered you will start timer and you will check if GPIO ISR is not called till timer expire
    • another way is to disable ISR when GPIO ISR is triggered and start timer with sampling interval. Inside timer ISR you will read state of GPIO pin to make sure that state is not changed.
    • ... hardware way with RC filter at GPIO pin can be useful as well

    Jan

  • 0 in reply to Jan D
    Prodigy 160 points

    Hi Jan,

    Thank you for your response. It seems useful; I will check if this meets the requirement.

    Best Regards,

    Kuldeep